c. e. n. c. e. chik, s. b. kurniawan, z. n. a. shukri, i. b. terkula, f. wahab, a. endut, f. lananan, h. a. hasan, s. r. s. abdullah & n. a. kasan.  (2024).  chitosan coagulant: coagulation/flocculation studies on turbidity removal from aquaculture wastewater by response surface methodology.  - international journal of environmental science and technology.  805-816. 

jamilah ahmad, nuratiqah marsidi, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman, nur izzati ismail, setyo budi kurniawan.  (2024).  integrating phytoremediation and mycoremediation with biosurfactant-producing fungi for hydrocarbon removal and the potential production of secondary resources.  - chemosphere.  1-24. 

taskeen reza, nur izzati ismail, zahratul huda mohamad riza, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman.  (2024).  microplastic removal in wastewater treatment plants (wwtps) by natural coagulation: a literature review.  - toxics.  1-17. 

benedict terkula iber, donald torsabo, che engku noramalina che engku chik, fachrul wahab, siti rozaimah sheikh abdullah, hassimi abu hassan, nor azman kasan.  (2023).  response surface methodology (rsm) approach to optimization of coagulation-flocculation of aquaculture wastewater treatment using chitosan from carapace of giant freshwater prawn macrobrachium rosenbergii.  - polymers.  1-27. 

nor sakinah mohd said, siti rozaimah sheikh abdullah, nur izzati ismail, hassimi abu hasan, ahmad razi othman.  (2023).  integrating treatment processes of coffee processing mill effluent for reclamation of secondary resources.  - journal of cleaner production.  1-18. 

benedict terkula iber, donald torsabo, chik che engku noramalina che engku, fachrul wahab, siti rozaimah sheikh abdullah, hassimi abu hassan, nor azman kasan.  (2023).  a study on the recovery and characterization of suspended solid from aquaculture wastewater through coagulation/flocculation using chitosan and its viability as organic fertilizer.  - journal of agriculture and food research.  1-10. 

benedict terkula iber, donald torsabo, che engku noramalina che engku chik, fachrul wahab, siti rozaimah sheikh abdullah, hassimi abu hassan and nor azman kasan.  (2023).  a study on the effects of interfering with the conventional sequential protocol for chemical isolation and characterization of chitosan from biowaste of giant freshwater prawn macrobrachium rosenbergii.  - heliyon.  1-19. 

benedict terkula iber, donald torsabo, che engku noramalina che engku chik, fachrul wahab, siti rozaimah sheikh abdullah, hassimi abu hasan, nor azman kasan.  (2023).  optimization of chitosan coagulant from dry legs of giant freshwater prawn, macrobrachium rosenbergii in aquaculture wastewater treatment using response surface methodology (rsm).  - journal of environmental chemical engineering.  1-16. 

khalid s. hashim, abdul kareem k. alsaffar, rasha salah alkizwini, abduljabar h. ali, eduardo alberto lópez-maldonado, jasim m. salman, soltan ms. alenezi, phil salmon, hassimi abu hasan, nadhir al-ansari.  (2023).  adsorption of fluoride on a green adsorbent derived from wastepaper: kinetic, isotherm and characterisation study.  - case studies in chemical and environmental engineering.  1-9. 

hassimi abu hasan, mohd hafizuddin muhamad, bin ji, nur aisyah nazairi, koh weng jiat, saffi irdina sim wan azlan sim, amir fitri muhammad shafiq poh.  (2023).  revolutionizing wastewater treatment with microalgae: unveiling resource recovery, mechanisms, challenges, and future possibilities.  - ecological engineering.  1-25. 

muhammad faidsyafiq othman, hassimi abu hasan, mohd hafizuddin muhamad, badiea s. babaqi.  (2023).  biopolishing of domestic wastewater using polyvinyl alcohol-supported biofilm of bacterial strain bacillus velezensis isolate jb7.  - journal of ecological engineering.  33-42. 

hassimi abu hasan, mohd hafizuddin muhamad, setyo budi kurniawan, junaidah buhari and osama husain abuzeyad.  (2023).  managing bisphenol a contamination: advances in removal technologies and future prospects.  - water.  1-34. 

abudukeremu kadier, raghuveer singh, dongsheng song, farshid ghanbari, nur syamimi zaidi, putu teta prihartini aryanti, dipak a. jadhav, m. amirul islam, mohd sahaid kalil, walid nabgan, aidil abdul hamid, hassimi abu hasan, peng-cheng ma.  (2023).  a novel pico-hydro power (php)-microbial electrolysis cell (mec) coupled system for sustainable hydrogen production during palm oil mill effluent (pome) wastewater treatment.  - international journal of hydrogen energy.  21066-21087. 

lingyang zhang, genji yang, hassimi abu hasan, jie fan, bin ji.  (2023).  adaptation mechanisms of microalgal-bacterial granular sludge to outdoor light-limited conditions.  - environmental research.  1-7. 

radhiatul atiqah ramli shah, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman, nur izzati ismail.  (2023).  prospective plants as biocoagulant-flocculants for removal of total suspended solids in coffee effluent treatment.  - chemical engineering research and design.  282-295. 

jamilah ahmad, siti rozaimah sheikh abdullah, hassimi abu hasan, israa abdulwahab al-baldawi, nuratiqah marsidi, nur izzati ismail.  (2023).  comparative performance of subsurface and free-surface planted beds for polishing real recycled paper effluent: influence of biomass ratio to pollutant.  - journal of water process engineering.  1-10. 

nur nadhirahramli, ahmad razi othman, setyo budikurniawan, siti rozaimah sheikh abdullah, hassimi abu hasan.  (2023).  metabolic pathway of cr(vi) reduction by bacteria: a review.  - microbiological research.  1-14. 

hasanain saad alhares, qahtan adnan ali, mohammed ali a. shaban, mohanad j. m-ridha, hawraa r. bohan, sabah j. mohammed, khalid m. abed, hassimi abu hasan.  (2023).  rice husk coated with copper oxide nanoparticles for 17(alpha)-ethinylestradiol removal from an aqueous solution: adsorption mechanisms and kinetics.  - environmental monitoring and assessment.  1-20. 

qahtan adnan ali, mohammed ali a. shaban, sabah j. mohammed, mohanad j. m-ridha, hussein h. abd-almohi, khalid m. abed, muhammad zulhaziman mat salleh, hassimi abu hasan.  (2023).  date palm fibre waste exploitation for the adsorption of congo redis dye via batch and continuous modes.  - journal of ecological engineering.  259-276. 

hasanain saad alhares, mohammed ali a. shaban, mohammed sadeq salman, mohanad j. m-ridha, sabah j. mohammed, khalid m. abed, mohammed a. ibrahim, ali k. al-banaa & hassimi abu hasan.  (2023).  sunflower husks coated with copper oxide nanoparticles for reactive blue 49 and reactive red 195 removals: adsorption mechanisms, thermodynamic, kinetic, and isotherm studies.  - water air and soil pollution.  1-20. 

junaidah buhari, hassimi abu hasan, setyo budi kurniawan, siti rozaimah sheikh abdullah, and ahmad razi othman.  (2023).  future and challenges of co-biofilm treatment on ammonia and bisphenol a removal from wastewater.  - journal of water process engineering.  1-17. 

nurull muna daud, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman, nur zzati ismail.  (2023).  coagulation-flocculation treatment for batik effluent as a baseline study for the upcoming application of green coagulants/flocculants towards sustainable batik industry.  - heliyon.  1-17. 

mohammad mohammad alnawajha, setyo budi kurniawan, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman.  (2023).  performance of leucaena leucocephala and alum in treating aquaculture: effect of dosage, rapid speed and settling time.  - international journal of environmental science and technology.  9981-9994. 

setyo budi kurniawan, muhammad fauzul imron, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman.  (2023).  coagulation-flocculation of aquaculture effluent using biobased flocculant: from artificial to real wastewater optimization by response surface methodology.  - journal of water processing engineering.  1-20. 

nur nadhirah ramli, setyo budi kurniawan, joshua o. ighalo, nor sakinah mohd said, nuratiqah marsidi, junaidah buhari, radhiatul atiqah ramli shah, maryam zulkili, jahira alias, nurull muna daud, jamilah ahmad, ahmad razi othman, siti rozaimah.  (2023).  a review of the treatment technologies for hexavalent chromium contaminated water.  - biometals.  1189-1219. 

setyo budi kurniawan, azmi ahmad, muhammad fauzul imron, siti rozaimah sheikh abdullah, ahmad razi othman, hassimi abu hasan.  (2023).  performance of chemical-based vs bio-based coagulants in treating aquaculture wastewater and cost-benefit analysis.  - polish journal of environmental studies.  1177-1187. 

muhammad fauzul imron, abiyyu armijn firman firdaus, zhiella octabriani flowerainsyah, dzikro rosyidah, nurina fitriani, setyo budi kurniawan, siti rozaimah sheikh abdullah, hassimi abu hasan, yudha gusti wibowo.  (2023).  phytotechnology for domestic wastewater treatment: performance of pistia stratiotes in eradicating pollutants and future prospects.  - journal of water process engineering.  1-8. 

ghazi m. aziz, sahar i. hussein, mohanad j. m-ridha, sabah j. mohammed, khalid m. abed, mohd hafizuddin muhamad, hassimi abu hasan.  (2023).  activity of laccase enzyme extracted from malva parviflora and its potential for degradation of reactive dyes in aqueous solution.  - biocatalysis and agricultural biotechnology.  1-11. 

junaidah buhari, hassimi abu hasan, nurul farhana mohd rahim, setyo budi kurniawan, siti rozaimah sheikh abdullah, ahmad razi othman.  (2022).  unveiling the optimal ammonia-oxidising bacterial consortium for polishing low ammonia-contaminated wastewater.  - journal of water process engineering.  1-9. 

yeow eu lun, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman, setyo budi kurniawan, muhammad fauzul imron, osama abrahiem al falahi, nor sakinah mohd said, siti shilatul najwa sharuddin, nur izzati ismail.  (2022).  integrated emergent-floating planted reactor for textile effluent: removal potential, optimization of operational conditions and potential forthcoming waste management strategy.  - journal of environmental management.  1-14. 

setyo budi kurniawan, muhammad fauzul imron, siti rozaimah sheikh abdullah, ahmad razi othman, ipung fitri purwanti & hassimi abu hasan.  (2022).  treatment of aquaculture effluent using bacteria-based bioflocculant produced by serratia marcescens.  - journal of water process engineering.  1-8. 

mohanad j. m-ridha, muna faeq ali, ahmed hussein taly, khalid m. abed, sabah j. mohammed, mohd hafizuddin muhamad, hassimi abu hasan.  (2022).  subsurface flow phytoremediation using barley plants for water recovery from kerosene-contaminated water: effect of kerosene concentration and removal kinetics.  - water.  1-12. 

jamal ali kawan, fatihah suja, sagor kumar pramanik, arij yusof, rakmi abdul rahman and hassimi abu hasan.  (2022).  effect of hydraulic retention time on the performance of a compact moving bed biofilm reactor for effluent polishing of treated sewage.  - water.  1-19. 

mohammed a. ibrahim, mohammed ali a. shaban, yaseen rashid hasan, mohanad j. m-ridha, haitham a. hussein, khalid m. abed, sabah j. mohammed, mohd hafizuddin muhamad, hassimi abu hasan.  (2022).  simultaneous adsorption of ternary antibiotics (levofloxacin, meropenem, tetracycline) by sunflower husk coated with copper oxide nanoparticles.  - journal of ecological engineering.  30-42. 

setyo budi kurniawan, nur nadhirah ramli, nor sakinah mohd said, jahira alias, muhammad fauzul imron, siti rozaimah sheikh abdullah, ahmad razi othman, ipung fitri purwanti, and hassimi abu hasan.  (2022).  practical limitations of bioaugmentation in treating heavy metal contaminated soil and role of plant growth promoting bacteria in phytoremediation as a promising alternative approach.  - heliyon.  1-14. 

nurull muna daud, siti rozaimah sheikh abdullah, hassimi abu hasan, nur izzati ismail, yeny dhokikah.  (2022).  integrated physical-biological treatment system for batik industry wastewater: a review on process selection.  - science of the total environment.  1-17. 

khalid m. abed, adeeb hayyan, amal a. m. elgharbawy, hanee f. hizaddin, mohd ali hashim, hassimi abu hasan, mahar diana hamid, fathiah m. zuki, jehad saleh and ahmad gh aldaihani.  (2022).  palm promising biomass precursor for activated carbon to promote lipase activity with the aid of eutectic solvents.  - molecules.  1-15. 

siti noor khaleeda mhd syahri, hassimi abu hasan, siti rozaimah sheikh abdullah, ahmad razi othman, peer mohamed abdul, raja farzarul hanim raja azmy, mohd hafizuddin muhamad.  (2022).  recent challenges of biogas production and its conversion to electrical energy.  - journal of ecological engineering.  251-269. 

fazli rahim, siti rozaimah sheikh abdullah, hassimi abu hassan, setyo budi kurniawan, alias mamat, kamarul arifin yusof and khairil irwan ambak.  (2022).  a feasibility study for the treatment of 1,2 dichloroethane contaminated groundwater using reedbed system and assessment of its natural attenuation.  - science of the total environment.  1-9. 

osama abrahiem al falahi, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman, hind mufeed ewadh, israa abduwahab al-baldawi, siti shilatul najwa sharuddin, setyo budi kurniawan, nur izzati ismail.  (2022).  elimination of mixed ibuprofen and paracetamol from spiked domestic wastewater via a pilot continuous aerated sub-surface constructed wetland system.  - journal of water process engineering.  1-16. 

benedict terkula iber, donald torsabo, che engku noramalina che engku chik, fachrul wahab, siti rozaimah sheikh abdullah, hassimi abu hassan, nor azman kasan.  (2022).  the impact of re-ordering the conventional chemical steps on the production and characterization of natural chitosan from biowaste of black tiger shrimp, penaeus monodon.  - journal of sea research.  1-15. 

osama abrahiem al falahi, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman, hind mufeed ewadh, setyo budi kurniawan, muhammad fauzul imron.  (2022).  occurrence of pharmaceuticals and personal care products in domestic wastewater, available treatment technologies, and potential treatment using constructed wetland: a review.  - process safety and environmental protection.  1067-1088. 

azmi ahmad, setyo budi kurniawan, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman.  (2022).  exploring extraction methods for plant-based coagulants and their future approaches.  - science of the total environment.  1-11. 

siti nur hatika abu bakar, hassimi abu hasan, abdul wahab mohammad, siti rozaimah sheikh abdullah, mohd hafizuddin muhamad.  (2022).  interactions between operating parameters of moving bed biofilm reactors in treating palm oil mill effluent.  - process safety and environmental protection.  567-575. 

mohammad mohammad alnawajha, setyo budi kurniawan, muhammad fauzul imron, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman.  (2022).  plant-based coagulants/flocculants characteristics, mechanisms, possible utilization in treating aquaculture effluent and benefiting from the recovered nutrients.  - environmental science and pollution research.  58430-58453. 

ahmad razi othman, nur shuhada ismail, siti rozaimah sheikh abdullah, hassimi abu hasan, setyo budi kurniawan, siti shilatul najwa sharuddin, nur izzati ismail.  (2022).  potential of indigenous biosurfactant-producing fungi from real crude oil sludge in.  - journal of environmental chemical engineering.  1-12. 

azmi ahmad, setyo budi kurniawan, jamilah ahmad, jahira alias, nuratiqah marsidi, nor sakinah mohd said, aiman syafiqah, junaidah buhari, nur nadhirah ramli, nurul farhana mohd rahim, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman.  (2022).  dosage-based application versus ratio-based approach for metal- and plant-based coagulants in wastewater treatment: merits, limitations and applicability.  - journal of cleaner production.  1-12. 

azmi ahmad, setyo budi kurniawan, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman.  (2022).  contaminants of emerging concern (cecs) in aquaculture effluent: insight into breeding and rearing activities, alarming impacts, regulations, performance of wastewater treatment unit and future approa.  - chemosphere.  1-15. 

z. m. hanafiah, w. h. m. wan mohtar, h. a. hasan, h. s. jensen, a. klaus, s. sharil, w. a. a. q. i. wan mohtar.  (2022).  ability of ganoderma lucidum mycelial pellets to remove ammonia and organic matter from domestic wastewater.  - international journal of environmental science and technology.  7307-7320. 

setyo budi kurniawan, muhammad fauzul imron, che engku noramalina che engku chik, amina adedoja owodunni, azmi ahmad, mohammad alnawajha, nurul farhana mohd rahim, siti rozaimah sheikh abdullah, nor azman kasan, suzylawati ismail, ahmad razi othman, and h.  (2022).  what compound inside biocoagulants/bioflocculants is contributing the most to the coagulation and flocculation processes?.  - science of the total environment.  1-25. 

setyo budi kurniawan, azmi ahmad, muhammad fauzul imron, siti rozaimah sheikh abdullah, ahmad razi othman and hassimi abu hasan.  (2022).  potential of microalgae cultivation using nutrient-rich wastewater and harvesting performance by biocoagulants/bioflocculants: mechanism, multi-conversion of biomass into valuable products, and future.  - journal of cleaner production.  1-24. 

hassimi abu hasan, dheenesh sai annanda shanmugam, siti rozaimah sheikh abdullah, mohd hafizuddin muhamad, and setyo budi kurniawan.  (2022).  potential of using dual-media biofilm reactors as a real coffee industrial effluent pre-treatment.  - water.  1-19. 

maryam zulkifli, hassimi abu hasan, siti rozaimah sheikh abdullah, mohd hafizuddin muhamad.  (2022).  a review of ammonia removal using a biofilm-based reactor and its challenges.  - journal of environmental management.  1-24. 

setyo budi kurniawan, muhammad fauzul imron, lukasz slugocki, kacper nowakowski, azmi ahmad, dhuroton najiya, siti rozaimah sheikh abdullah, ahmad razi othman, ipung fitri purwanti, hassimi abu hasan.  (2022).  assessing the effect of multiple variables on the production of bioflocculant by serratia marcescens flocculating activity, kinetics, toxicity, and flocculation mechanism.  - science of the total environment.  1-12. 

jahira alias, hassimi abu hasan, siti rozaimah sheikh abdullah, ahmad razi othman.  (2022).  properties of bioflocculant-producing bacteria for high flocculating activity efficiency.  - environmental technology & innovation.  1-10. 

abudukeremu kadier, junying wang, k.chandrasekhar, peyman abdeshahian, m. amirul islam, farshid ghanbari, mukul bajpai, surjit singh katoch, prashant basavara bhagawati, hui li, mohd sahaid kalil, aidil abdul hamid, hassimi abu hasan, peng-cheng ma.  (2022).  performance optimization of microbial electrolysis cell (mec) for palm oil mill effluent (pome) wastewater treatment and sustainable bio-h2 production using response surface methodology (rsm).  - international journal of hydrogen energy.  15464-15479. 

azmi ahmad, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman, nur izzati ismail.  (2022).  potential of local plant leaves as natural coagulant for turbidity removal.  - environmental science and pollution research.  2579-2587. 

ahmad razi othman, hassimi abu hasan, mohd hafizzudin mohamad, nur izzati ismail, siti rozaimah sheikh abdullah.  (2021).  microbial degradation of microplastics by enzymatic processes: a review.  - environmental chemistry letters.  3057-3073. 

chin sze yee, victor tosin okomoda, fakriah hashim, khor waiho, siti rozaimah sheikh abdullah, alamanjo cosmas, hassimi abu hasan, emienour muzalina mustafa, and nor azman kasan.  (2021).  marine microalgae co-cultured with floc-forming bacterium: insight into growth and lipid productivity.  - peerj.  1-18. 

hassimi abu hasan, nuradila jamal, siti rozaimah sheikh abdullah, siti nur hatika abu bakar, mohd hafizuddin muhamad, xiangkun li.  (2021).  effective iron-accumulating bacteria isolated from chemical laboratory drainage for iron removal.  - journal of ecological engineering.  187-194. 

israa abdulwahab al-baldawi, siti rozaimah sheikh abdullah, nur izzati ismail, hassimi abu hasan.  (2021).  biodecolourisation of methylene blue in water using recycled paper mill activated sludge culture in a sequencing batch reactor.  - malaysian journal of biochemistry & molecular biology.  29-36. 

nurull muna daud, siti rozaimah sheikh abdullah, hassimi abu hasan and nur izzati ismail.  (2021).  toxicity test of scirpus grossus and eichhornia crassipes for textile wastewater phytoremediation.  - malaysian journal of biochemistry & molecular biology.  122-130. 

nurul noramelya zulkefli, mohd shahbudin masdar, wan nor roslam wan isahak, siti nur hatika abu bakar, hassimi abu hasan, nabilah mohd sofian.  (2021).  application of response surface methodology for preparation of znac2/cac adsorbents for hydrogen sulfide (h2s) capture.  - catalysts.  1-25. 

setyo budi kurniawan, azmi ahmad, nor sakinah mohd said, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman, ipung fitri purwanti, muhammad fauzul imron.  (2021).  macrophytes as wastewater treatment agent: nutrient uptake and potential of produced biomass utilization toward circular economy initiative.  - science of the total environment.  1-14. 

mohanad j. m-ridha, suhair l. zeki, sabah j. mohammed, khalid m. abed, hassimi abu hasan.  (2021).  heavy metals removal from simulated wastewater using horizontal subsurface constructed wetland.  - journal of ecological engineering.  243-250. 

hassimi abu hasan, jahira alias, farahanim nabila arbain, siti rozaimah sheikh abdullah, nor azman kasan, mohd hafizuddin muhamad.  (2021).  reusing sago mill effluent as a substrate for bio-based polymeric flocculant fermentation: optimisation of operational conditions.  - environmental technology & innovation.  1-11. 

silambarasi mooralitharan, zarimah mohd hanafiah, teh sabariah binti abd manan, hassimi abu hasan, henriette s. jensen, wan abd al qadr imad wan-mohtar, wan hanna melini wan mohtar.  (2021).  optimization of mycoremediation treatment for the chemical oxygen demand (cod) and ammonia nitrogen (an) removal from domestic effluent using wild-serbian ganoderma lucidum (wsgl).  - environmental science and pollution research.  32528-32544. 

setyo budi kurniawan, siti rozaimah sheikh abdullah, ahmad razi othman, ipung fitri purwanti, muhammad fauzul imron, nur izzati ismail, azmi ahmad, hassimi abu hasan.  (2021).  isolation and characterization of bioflocculant-producing bacteria from aquaculture effluent and its performance in treating high turbid water.  - journal of water process engineering.  1-10. 

osama abrahiem al falahia, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman, hind mufeed ewadh, israa abdulwahab al-baldawi, setyo budi kurniawan, muhammad fauzul imron, nur izzati ismail.  (2021).  simultaneous removal of ibuprofen, organic material, and nutrients from domestic wastewater through a pilot-scale vertical sub-surface flow constructed wetland with aeration system..  - journal of water process engineering.  1-13. 

nor sakinah mohd said, setyo budi kurniawan, siti rozaimah sheikh abdullah, hassimi abu hassan, ahmad razi othman, nur izzati ismail.  (2021).  competence of lepironia articulata in eradicating chemical oxygen demand and ammoniacal nitrogen in coffee processing mill effluent and its potential as green straw.  - science of the total environment.  1-8. 

mohd hafizuddin muhamad, siti rozaimah sheikh abdullah, hassimi abu hasan, siti nur hatika abu bakar, setyo budi kurniawan, nur izzati ismail.  (2021).  a hybrid treatment system for water contaminated with pentachlorophenol: removal performance and bacterial community composition.  - journal of water process engineering.  1-14. 

donald anak juan, hassimi abu hasan, mohd hafizuddin muhamad, siti rozaimah sheikh abdullah, siti nur hatika abu bakar, junaidah buhari.  (2021).  physico-chemical and biological techniques of bisphenol a removal in aqueous solution.  - journal of ecological engineering.  136-148. 

azmi ahmad, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman, nur izzati ismail.  (2021).  plant-based versus metal-based coagulants in aquaculture wastewater treatment: effect of mass ratio and settling time.  - journal of water process engineering.  1-8. 

setyo budi kurniawan, azmi ahmad, nurul farhana mohd rahim, nor sakinah mohd said, mohammad mohammad alnawajha, muhammad fauzul imron, siti rozaimah sheikh abdullah, ahmad razi othman, nur izzati ismail, hassimi abu hasan.  (2021).  aquaculture in malaysia: water-related environmental challenges and opportunities for cleaner production.  - environmental technology & innovation.  1-18. 

siti shilatul najwa sharuddin, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman, nur izzati ismail.  (2021).  potential bifunctional rhizobacteria from crude oil sludge for hydrocarbon degradation and biosurfactant production.  - process safety and environmental protection.  108-121. 

ainil farhan mohd udaiyappan, hassimi abu hasan, mohd sobri takriff, siti rozaimah sheikh abdullah, nazlina haiza mohd yasin, bin ji.  (2021).  cultivation and application of scenedesmus sp. strain ukm9 in palm oil mill effluent treatment for enhanced nutrient removal.  - journal of cleaner production.  1-10. 

maryam aqilah norhan, siti rozaimah sheikh abdullah, hassimi abu hasan & nur izzati ismail.  (2021).  a constructed wetland system for bio-polishing palm oil mill effluent and its future research opportunities.  - journal of water process engineering.  1-8. 

siqi fan, bin ji, hassimi abu hasan, jie fan, shaodong guo, jian wang & julin yuan.  (2021).  microalgal-bacterial granular sludge process for non-aerated aquaculture wastewater treatment.  - bioprocess and biosystems engineering.  1733-1739. 

berhanuddin ms, aris a, chelliapan s, abdul majid z, hasan ha.  (2021).  nutrients removal by titanium dioxide-zeolite (tdz) composite.  - international journal of current research and review.  2-7. 

hind munaem ahmed, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman, nur izzati ismail, setyo budi kurniawan.  (2021).  phytotoxicity of coffee wastewater to water hyacinth as prior step to phytotreatment assessment: influence of concentration and amount of plant biomass.  - environmental engineering and management journal.  317-328. 

setyo budi kurniawan, siti rozaimah sheikh abdullah, muhammad fauzul imron, azmi ahmad, nor sakinah mohd said, nurul farhana mohd rahim, mohammad mohammad alnawajha, hassimi abu hasan, ahmad razi othman, ipung fitri purwanti.  (2021).  potential of valuable materials recovery from aquaculture wastewater: an introduction to resource reclamation.  - aquaculture research.  2954-2962. 

azmi ahmad, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman & nur izzati ismail.  (2021).  aquaculture industry: supply and demand, best practices, effluent and its current issues and treatment technology.  - journal of environmental management.  1-14. 

nadya hussin al sbani, siti rozaimah sheikh abdullah, mushrifah idris, hassimi abu hasan, mohd izuan effendi halmi, omar hamed jehawi,nur izzati ismail.  (2021).  pah-degrading rhizobacteria of lepironia articulata for phytoremediation enhancement.  - journal of water process engineering.  1-11. 

siti nur hatika abu bakar, hassimi,abu hasan, siti rozaimah sheikh abdullah, nor azman kasan, mohd hafizuddin,muhamad, setyo budi kurniawan.  (2021).  a review of the production process of bacteria-based polymeric flocculants.  - journal of water process engineering.  1-13. 

nor sakinah mohd said, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman, nur izzati ismail.  (2021).  endurance of phragmites karka in removing colour and suspended solids from industrial coffee processing effluents in a continuous reed bed system.  - journal of water process engineering.  1-7. 

mohd hafizuddin muhamad, siti rozaimah sheikh abdullah, hassimi abu hasan, siti nur hatika abu bakar.  (2020).  multimedia-sequencing batch biofilm reactor in treating recycled paper mill effluent containing high level of pentachlorophenol: long-term performance, mechanism and kinetic studies.  - journal of water process engineering.  1-17. 

israa abdul wahab al-baldawi, siti rozaimah sheikh abdullah, asia fadhile almansoory, nur izzati ismail, hassimi abu hasan, nurina anuar.  (2020).  role of salvinia molesta in biodecolorization of methyl orange-dye from water.  - scientific reports.  1-9. 

siti nur hatika abu bakar, hassimi abu hasan, abdul wahab mohammad, siti rozaimah sheikh abdullah, rahmat ngteni, khairul muis mohamed yusof.  (2020).  erratum to `performance of a laboratory-scale moving bed biofilm reactor (mbbr) and its microbial diversity in palm oil mill effluent (pome) treatment` [process saf. environ. prot. 142 (2020) 325-335].  - process safety and environmental protection.  1. 

mahmoud a.m. al-alwania, hassimi abu hasan, najeeb kaid nasser al-shorgani, abu baker s.a. al-mashaan.  (2020).  natural dye extracted from areca catechu fruits as a new sensitiser for dye-sensitised solar cell fabrication: optimisation using d-optimal design.  - materials chemistry and physics.  1-9. 

hassimi abu hasan, ezril hafiz razali, mohd hafizuddin muhamad, and siti rozaimah sheikh abdullah.  (2020).  bioflocculant production using palm oil mill and sago mill effluent as a fermentation feedstock: characterization and mechanism of flocculation.  - journal of environmental management.  1-8. 

nor sakinah mohd said, siti rozaimah sheikh abdullah, nur izzati ismail, hassimi abu hasan, ahmad razi othman.  (2020).  phytoremediation of real coffee industry effluent through a continuous two-stage constructed wetland system.  - environmental technology & innovation.  1-12. 

atyaf farooq alshekhli, hassimi abu hasan, mohd hafizuddin muhamad, siti rozaimah sheikh abdullah.  (2020).  development of adsorbent from phytoremediation plant waste for methylene blue removal.  - journal of ecological engineering.  207-215. 

hassimi abu hasan, mohd hafizuddin muhammad, nur 'izzati ismail.  (2020).  a review of biological drinking water treatment technologies for contaminants removal from polluted water resources.  - journal of water process engineering.  1-16. 

ahmad razi othman nur suhada mohd halimi muhammad shafiq sharafuddin mat zaini hassimi abu hasan nur izzati ismail siti rozaimah sheikh abdullah.  (2020).  degradation of carbofuran using malaysian isolate bacillus sp..  - malaysian journal of biochemistry and molecular biology.  1-7. 

mohd aidil kamaruzzaman, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman, maizom hassan & mushrifah idris.  (2020).  characterisation of pb-resistant plant growth-promoting rhizobacteria (pgpr) from scirpus grossus.  - biocatalysis and agricultural biotechnology.  1-7. 

setyo budi kurniawan, muhammad fauzul imron, nor sakinah said, nur izzati ismail, siti rozaimah sheikh abdullah, hassimi abu hasan, ahmad razi othman, ipung fitri purwanti.  (2020).  challenges and opportunities of biocoagulant/bioflocculant application for drinking water and wastewater treatment and its potential for sludge recovery.  - international journal of environmental research and public health.  1-33. 

ipung fitri purwanti, harmin sulistyaning titah, bieby voijant tangahu, sarwoko mangkoedihardjo, mahdiyah anes, rizki mona syawlia and hassimi abu hassan.  (2020).  optimization of the coagulation flocculation process of benowo landfill using polyaluminum chloride and chitosan.  - ecology, environment and conservation.  S119-S123. 

ainil farhan mohd udaiyappan, hassimi abu hasan, mohd sobri takriff, siti rozaimah sheikh abdullah, toshinari maeda, nurul asyifah mustapha, nazlina haiza mohd yasin, noor irma nazashida mohd hakimi.  (2020).  microalgae-bacteria interaction in palm oil mill effluent treatment.  - journal of water process engineering.  1-12. 

omar hamed jehawi, siti rozaimah sheikh abdullah, setyo budi kurniawan, mushrifah idris, nur izzati ismail, nadya hussin al sbani, mushrifah idris mohd hafizuddin muhamad, hassimi abu hasan.  (2020).  performance of pilot hybrid reed bed constructed with aeration system on nutrient removal for domestic wastewater treatment.  - environmental technology & innovation.  1-9. 

jamal ali kawan, fatihah suja, hassimi abu hasan, othman jaafar and rakmi abd rahman.  (2020).  development of malaysian wastewater polishing index: case study on a moving bed biofilm reactor.  - journal of ecological engineering.  1-8. 

siti nur hatika abu bakar, hassimi abu hasan, abdul wahab mohammad, siti rozaimah sheikh abdullah, rahmat ngteni, khairul muis mohamed yusof.  (2020).  performance of a laboratory-scale moving bed biofilm reactor (mbbr) and its microbial diversity in palm oil mill effluent (pome) treatment.  - process safety and environmental protection.  325-335. 

daniah ali hassoon nash, siti rozaimah sheikh abdullah, hassimi abu hasan, mushrifah idris, ahmad razi othman, israa abdulwahab al-baldawi, nur izzati ismail.  (2020).  utilisation of an aquatic plant (scirpus grossus) for phytoremediation of real sago mill effluent.  - environmental technology and innovation.  1-11. 

sajjad al-amshawee, mohd yusri bin mohd yunus, abdul aziz mohd azoddein, david geraint hassell, ihsan habib dakhil, hassimi abu hasan.  (2020).  electrodialysis desalination for water and wastewater: a review.  - chemical engineering journal.  1-19. 

nadya hussin al sbani, siti rozaimah sheikh abdullah, mushrifah idris, hassimi abu hasan, israa abdulwahab al-baldawi, omar hamed jehawi & nur izzati ismail.  (2020).  remediation of pahs-contaminated water and sand by tropical plant (eleocharis ochrostachys) through sub-surface flow system.  - environmental technology and innovation.  1-9. 

nur izzati ismail, siti rozaimah sheikh abdullah, mushrifah idris, setyo budi kurniawan, mohd izuan effendi halmi, nadya hussin al sbani, omar hamed jehawi & hassimi abu hasan.  (2020).  applying rhizobacteria consortium for the enhancement of scirpus grossus growth and phytoaccumulation of fe and al in pilot constructed wetlands..  - journal of environmental management.  1-12. 

azlin abd kadir, siti rozaimah sheikh abdullah, babul airianah othman, hassimi abu hasan, ahmad razi othman, muhammad fauzul imron, setyo budi kurniawan, nur izzati ismail.  (2020).  dual function of lemna minor and azolla pinnata as phytoremediator for palm oil mill effluent and as feedstock.  - chemosphere.  1-13. 

nur izzati ismail, siti rozaimah sheikh abdullah, mushrifah idris, hassimi abu hasan, mohd izuan effendi halmi, nadya hussin al sbani, omar hamed jehawi.  (2019).  simultaneous bioaccumulation and translocation of iron and aluminium from mining wastewater by scirpus grossus.  - desalination and water treatment.  133-142. 

omar h. jehawi, siti rozaimah s. abdullah, hassimi a. hassan, nadya h. al sbani, nur izzati ismail & saleh o. a. handi.  (2019).  kinetic of nutrient removal in low-strength domestic wastewater under continuous operation of pilot scale of hybrid reed bed system (sf-vf-hf).  - journal of engineering and applied sciences.  9154-9161. 

suhair hussein safauldeen, hassimi abu hasan and siti rozaimah sheikh abdullah.  (2019).  phytoremediation efficiency of water hyacinth for batik textile effluent treatment.  - journal of ecological engineering.  177-187. 

zarimah mohd hanafiah, wan hanna melini wan mohtar, hassimi abu hasan, henriette stokbro jensen, anita klaus, wan abd al qadr imad wan-mohtar.  (2019).  performance of wild-serbian ganoderma lucidum mycelium in treating synthetic sewage loading using batch bioreactor.  - scientific reports.  1-12. 

saja radhi nayyef alanbary, siti rozaimah sheikh abdullah, israa abdul wahab al-baldawi, hassimi abu hasan, nurina anuar, ahmad razi othman & fatihah suja.  (2019).  phytotoxicity of contaminated sand containing crude oil sludge on ludwigia octovalvis.  - journal of ecological engineering.  246-255. 

muhamad farhan md yusoff, siti rozaimah sheikh abdullah, hassimi abu hasan, hawati janor & habibah ahmad.  (2019).  performance of continuous pilots ubsurface constructed wetland using scirpus grossus for removal of cod, colour and suspended solid in recycled pulp and paper effluent.  - environmental technology & innovation.  . 

daniah ali hassoon nash, siti rozaimah sheikh abdullah, hassimi abu hasan, mushrifah idris, nurul fadhilah muhammad, israa abdulwahab al-baldawi, nur izzati ismail.  (2019).  phytoremediation of nutrients and organic carbon from sago mill effluent using water hyacinth (eichhornia crassipes).  - journal of engineering and technological sciences.  573-584. 

nuratiqah marsidi, hassimi abu hasan, mohd izuan effendi halmi, siti rozaimah sheikh abdullah.  (2019).  resistance of native bacteria isolated from activated sludge towards iron and manganese.  - malaysian journal of analytical sciences.  131-137. 

asia fadhile almansoory, hassimi abu hasan, siti rozaimah sheikh abdullah, mushrifah idris, nurina anuar, wedad m. al-adiwish.  (2019).  biosurfactant produced by the hydrocarbon-degrading bacteria: characterization, activity and applications in removing tph from contaminated soil.  - environmental technology & innovation.  1-11. 

samsun nahar, md. riad hasan, abdul amir h. kadhum, hassimi abu hasan, m.f.m. zain.  (2019).  photocatalytic degradation of organic pollutants over visible light active plasmonic ag nanoparticle loaded ag2so3 photocatalysts.  - journal of photochemistry and photobiology a: chemistry.  . 

enas abdulqader, siti rozaimah abdullah, hassimi abu hasan, nur izzati ismail, reehan adne ab. rahim, mushrifah idris.  (2019).  plant-assisted remediation of wastewater contaminated with methyl orange using scirpus grossus.  - journal of environmental biology.  515-523. 

n.h. kasmuri1, s. k. kamarudin, s. r. s. abdullah, h. a. hasan, a. md. som.  (2019).  integrated advanced nonlinear neural network-simulink controlsystem for production of bio-methanol from sugar cane bagasse viapyrolysis.  - energy.  . 

mohd shaiful sajab, nur nadia nazirah ismail, jude santanaraj, abdul wahab mohammad, hassimi abu hassan, chin hua chia, sarani zakaria, anamt mohamed noor.  (2019).  insight observation into rapid discoloration of batik textile effluent by in situ formations of zero valent iron.  - sains malaysiana.  393-399. 

mohd aidil kamaruzzaman, siti rozaimah sheikh abdullah, hassimi abu hasan, maizom hassan, mushrifah idris, nur izzati ismail.  (2019).  potential of hexavalent chromium-resistant rhizosphere bacteria in promoting plant growth and hexavalent chromium reduction.  - journal of environmental biology.  427-433. 

mohd hafizuddin muhamad, siti rozaimah sheikh abdullah, hassimi abu hasan, nur izzati ismail.  (2019).  effects of pentachlorophenol load on pcp, cod and nh3- n removal in lab-scale multimedia-sequencing batch biofilm reactor treating recycled paper mill wastewater.  - journal of environmental biology.  556-562. 

enas abdulqader, siti rozaimah abdullah, hassimi abu hasan, reehan adre ab. rahim, mushrifah idris, mohd aidil kamaruzzaman, nur izzati ismail.  (2019).  isolation and identification of tolerant bacteria from roots of scirpus grossus exposed to mixed synthetic dye.  - plant archives.  2034-2039. 

fuzieah subari, siti rozaimah sheikh abdullah, hassimi abu hasan & norliza abd. rahman.  (2018).  biological removal of ammonia by naturally grown bacteria in sand biofilter.  - malaysian journal of analytical sciences.  . 

israa abdulwahab albaldawi, siti rozaimah sheikh abdullah, nurina anuar, hassimi abu hasan.  (2018).  phytotransformation of methylene blue from water using aquatic plant (azolla pinnata).  - environmental technology & innovation.  . 

nuratiqah marsidi, hassimi abu hasan, siti rozaimah sheikh abdullah.  (2018).  a review of biological aerated filters for iron and manganese ions removal in water treatment.  - journal of water process engineering.  1-12. 

fathiyyah mohd zainudin, hassimi abu hasan, siti rozaimah sheikh abdullah.  (2018).  an overview of the technology used to remove trihalomethane (thm), trihalomethane precursors, and trihalomethane formation potential (thmfp) from water and wastewater.  - journal of industrial and engineering chemistry.  1-14. 

azlin abd kadir, siti rozaimah sheikh abdullah & hassimi abu hasan.  (2018).  comparative phytotoxicity of azolla pinnata and lemna minor in treated palm oil mill effluent.  - international journal of engineering and technology (uae).  . 

fuzieah subari, mohd aidil kamaruzzaman, siti rozaimah sheikh abdullah, hassimi abu hasan & ahmad razi othman.  (2018).  simultaneous removal of ammonium and manganese in slow sand biofilter (ssb) by naturally grown bacteria from lake water and its diverse microbial community.  - journal of environmental chemical engineering.  . 

mohd hafizuddin muhamad, siti rozaimah sheikh abdullah, hassimi abu hasan, reehan adnee abd. rahim, siti nur hatika abu bakar, nur izzati ismail, mohd izuan effendi halmi.  (2018).  adsorption isotherm and kinetic studies of pentachlorophenol removal from aqueous solution onto coconut shell-based granular activated carbon.  - journal of environmental science and technology.  . 

harmin sulistiyaning titah, mohd izuan effendi bin halmi, siti rozaimah sheikh abdullah, hassimi abu hasan, mushrifah idris, nurina anuar.  (2018).  statistical optimization of the phytoremediation of arsenic by ludwigia octovalvis in a pilot reed bed using response surface methodology (rsm) versus an artificial neural network (ann).  - international journal of phytoremediation.  . 

siti norleela selamat, mohd izuan effendi halmi, siti rozaimah sheikh abdullah, mushrifah idris, hassimi abu hassan & nurina anuar.  (2018).  optimization of lead (pb) bioaccumulation in melastoma malabathricum l. by response surface methodology (rsm).  - rendiconti lincei - scienze fisiche e naturali.  43-51. 

hind m. ewadh, siti rozaimah abdullah, nurina anwar, hassimi abu hasan & mufeed jalil ewadh.  (2018).  the effect of pharmaceuticals and personal care products (ppcps) on human embryonic cells 293hek proliferation.  - journal of pharmaceutical sciences and research.  . 

nurull muna daud, siti rozaimah sheikh abdullah, hassimi abu hasan.  (2018).  response surface methodological analysis for the optimization of acid catalyzed transesterification biodiesel wastewater pretreatment using coagulation flocculation process.  - process safety and environmental protection.  184-192. 

nur anira syafiqah hazman, nazlina haiza mohd yasin, mohd sobri takriff, hassimi abu hasan, kamrul fakir kamarudin, noor irma nazashida mohd hakimi.  (2018).  integrated palm oil mill effluent treatment and co2 sequestration by microalgae.  - sains malaysiana.  . 

abdualati ibrahim al-tabib, najeeb kaid nasser al-shorgani, hassimi abu hasan, aidil abdul hamid and mohd sahaid kalil.  (2018).  assessment of the detoxification of palm kernel cake hydrolysate for butanol production by clostridium. acetobutylicum ym1.  - biocatalysis and agricultural biotechnology.  105-109. 

abudukeremu kadier, mohd sahaid kalil, manoj pudukudy, hassimi abu hasan, azah mohamed and aidil abdul hamid.  (2018).  pico hydropower (php) development in malaysia: potential, present status, barriers and future perspectives.  - renewable and sustainable energy reviews.  2796-2805. 

siti nur hatika abu bakar, hassimi abu hasan, abdul wahab mohammad, siti rozaimah sheikh abdullah, teow yeit haan, rahmat ngteni and khairul muis mohamed.  (2018).  a review of moving-bed biofilm reactor technology for palm oil mill effluent treatment.  - journal of cleaner production.  1532-1545. 

hassimi abu hasan, siti rozaimah sheikh abdullah, siti kartom kamarudin, noorhisham tan kofli.  (2018).  hrt effect on simultaneous cod, ammonia and manganese removal from drinking water treatment system using a biological aerated filter (baf).  - environmental engineering and management journal.  . 

abdualati ibrahim al-tabib, najeeb kaid nasser al-shorgani, hassimi abu hasan, aidil abdul hamid and mohd sahaid kalil.  (2017).  production of acetone- butanol and ethanol (abe) by clostridium acetobutylicum ym1 from pretreated palm kernel cake in batch culture fermentation.  - bioresources.  3371-3386. 

khuzaimah arifin; siti masrinda tasirin; hassimi abu hasan; lim kean long.  (2017).  towards net carbon neutrality.  - jurnal teknologi.  1-130. 

n.h. kasmuri, s.k. kamarudin, s.r.s. abdullah, h.a. hasan, a.md. som.  (2017).  process system engineering aspect of bio-alcohol fuel production from biomass via pyrolysis: an overview.  - renewable and sustainable energy reviews.  914-923. 

samsun nahar, m.f.m. zain, abdul amir h. kadhum, hassimi abu hasan , md riad hasan.  (2017).  advances in photocatalytic co2 reduction with water: a review.  - materials.  1-26. 

enas abdulqader saeed almaamary, siti rozaimah sheikh abdullah, hassimi abu hassan, reehan adne abdul rahman & mushrifah idris.  (2017).  treatment of methylene blue in wastewater using scirpus grossus.  - malaysian journal of analytical sciences.  182-187. 

nur izzati ismail, siti rozaimah sheikh abdullah, mushrifah idris, hassimi abu hasan, mohd izuan effendi halmi, nadya hussin al sbani, omar hamed jehawi, salmi nur ain sanusi and mohd hafifi hashim.  (2017).  accumulation of fe-al by scirpus grossus grown in synthetic bauxite mining wastewater and identification of its resistant rhizobacteria.  - environmental engineering science.  367-375. 

jamilah ahmad, siti rozaimah sheikh abdullah, hassimi abu hassan, reehan adne abdul rahman & mushrifah idris.  (2017).  screening of tropical native aquatic plants for polishing pulp and paper mill final effluent.  - malaysian journal of analytical sciences.  105-112. 

asia fadhile almansoory, hassimi abu hasan, mushrifah idris, siti rozaimah sheikh abdullah, nurina anuar, & el mubarak musa tibin.  (2017).  biosurfactant production by the hydrocarbon-degrading bacteria (hdb) serratia marcescens: optimization using central composite design (ccd).  - journal of industrial and engineering chemistry.  272-280. 

ainil farhan mohd udaiyappan, hassimi abu hasan, mohd sobri takriff, siti rozaimah sheikh abdullah.  (2017).  a review of the potentials, challenges and current status of microalgae biomass applications in industrial wastewater treatment.  - journal of water process engineering.  8-21. 

salmi nur ain sanusi, mohd izuan effendi halmi, siti rozaimah sheikh abdullah, hassimi abu hassan, firdaus mohamad hamzah & mushrifah idris.  (2016).  comparative process optimization of pilot scale total petroleum hydrocarbon (tph) degradation by paspalum scrobiculatum l. hack using response surface methodology (rsm) and artificial neural network.  - ecological engineering.  524-534. 

nuratiqah marsidi, chan khan nye, siti rozaimah sheikh abdullah, hassimi abu hassan and mohd izuan effendi halmi.  (2016).  phytoremediation of naproxen in waste water using vetiver zizaniodes.  - journal of engineering science and technology (jestec).  1086-1097. 

hassimi abu hasan, siti masrinda tasirin and khuzaimah arifin.  (2016).  special issue on the 28th symposium of malaysian chemical engineers (somche 2015).  - journal of engineering science and technology.  1-136. 

muhammad said, hassimi abu hasan, mohd tusirin mohd nor and abdul wahab mohammad.  (2016).  removal of cod, tss and colour from palm oil mill effluent (pome) using montmorillonite.  - desalination and water treatment.  10490-10497. 

hassimi abu hasan, siti rozaimah sheikh abdullah, nor ashikin shafinaz whayab, fathiyyah mohd zainudin, muhammad farhan md yusoff.  (2016).  design of supporting media for growth of biofilm in treating industrial wastewater.  - indian journal of science & technology.  1-6. 

muhammad h.j. khadidi, mohd s. kalil, aidil a. hamid and hassimi a. hasan.  (2016).  characterization and performance evaluation of reused wabe as flocculants agent to treat paper mill wastewater.  - journal of engineering science and technology.  694-703. 

hassimi abu hasan, siti rozaimah sheikh abdullah, noorhisham tan kofli, shy jay yeoh.  (2016).  interaction of environmental factors on simultaneous biosorption of lead and manganese ions by locally isolated bacillus cereus.  - journal of industrial and engineering chemistry.  295-305. 

fathiyyah mohd zainudin, hassimi abu hasan and siti rozaimah sheikh abdullah.  (2016).  characterization of trihalomethanes (thms) levels in surface water, domestic and industrial wastewater.  - journal of environmental science and technology.  268-276. 

hassimi abu hasan, siti rozaimah sheikh abdullah, ali waheid nakemish al-attabi, daniah ali hassoon nash, nurina anuar, norliza abd. rahman, harmin sulistiyaning titah.  (2016).  removal of ibuprofen, ketoprofen, cod and nitrogen compounds from pharmaceutical wastewater using aerobic suspension-sequencing batch reactor (assbr).  - separation and purification technology.  215-221. 

nadya hussin al-sbani, siti rozaimah sheikh abdullah, mushrifah idris, hassimi abu hasan, omar hamed jehawi & nur izzati ismail.  (2016).  toxicity test of hydrocarbon exposure on lepironia articulate in phytoremediation process.  - asian journal of chemistry.  30-34. 

azrul a.mutalib, khairul nizam abd. maulud, norhana arsad, hassimi abu hasan.  (2016).  journal of engineering science & technology.  - journal of engineering science & technology.  1-110. 

jamal ali kawan, hassimi abu hasan, fatihah suja`, othman bin jaafar, rakmi abd-rahman.  (2016).  a review on sewage treatment and polishing using moving bed bioreactor (mbbr).  - journal of engineering science and technology.  1098-1120. 

nadya hussin al-sbani, siti rozaimah sheikh abdullah, mushrifah idris, hassimi abu hasan, omar hamed jehawi & nur izzati ismail.  (2016).  sub-surface flow system for pahs removal in water using lepironia articulate under greenhouse conditions.  - ecological engineering.  1-8. 

siti afifah muda, omar syah jehan elham, hassimi abu hasan & siti rozaimah sheikh abdullah.  (2016).  production of biogas through anaerobic digestion of cabomba furcata in digester batch system.  - malaysian journal of analytical sciences.  1491-1497. 

asia fadhile almansoory, hassimi abu hasan, mushrifah idris, siti rozaimah sheikh abdullah and nurina anuar.  (2015).  potential application of a biosurfactant in phytoremediation technology for treatment of gasoline-contaminated soil.  - ecological engineering.  113-120. 

siti rozaimah sheikh abdullah, mohd shahbuddin mastar, hassimi abu hasan.  (2015).  course outcome achievement in fundamentals of thermodynamics course through direct and indirect measurement.  - journal of engineering science and technology.  74-81. 

mohd hafizuddin muhamad, siti rozaimah sheikh abdullah, hassimi abu hasan.  (2015).  efficiency of attached-growth sequencing batch reactor in the treatment of recycled paper mill wastewater.  - jurnal teknologi.  89-94. 

muhammad said, abdul wahab mohammad, mohd tusirin mohd nor, siti rozaimah sheikh abdullah & hassimi abu hasan.  (2015).  investigation of three pre-treatment methods prior to nanofiltration membrane for palm oil mill effluent treatment.  - saians malaysiana.  421-427. 

hassimi abu hasan, siti rozaimah sheikh abdullah, siti kartom kamarudin and noorhisham tan kofli.  (2015).  effective curves of completing simultaneous ammonium and manganese removal in polluted water using a biological aerated filter.  - journal of industrial and engineering chemistry.  153-159. 

nur izzati ismail, siti rozaimah sheikh abdullah, mushrifah idris, hassimi abu hasan, nadya hussin al sbani and omar hamed jehawi.  (2015).  tolerance and survival of scirpus grossus and lepironia articulata in synthetic mining wastewater.  - journal of environmental science and technology.  232-237. 

omar hamed jehawi, siti rozaimah sheikh abdullah, mushrifah idris, hassimi abu hasan, nadya hussin al sbani, nur izzati ismail.  (2015).  removal of chemical oxygen demand (cod) from domestic wastewater using hybrid reed bed system.  - applied mechanics and materials.  1226-1230. 

hassimi abu hasan, shahrizan jamaludin and siti rozaimah sheikh abdullah.  (2015).  aeration control based on a neural network in a biological aerated filter for simultaneous removal of ammonia and manganese.  - journal of environmental science and technology.  278-288. 

mohd hafizuddin muhamad, siti rozaimah sheikh abdullah, hassimi abu hasan and reehan adne abd. rahim.  (2015).  comparison of the efficiencies of attached- versus suspended-growth sbr systems in the treatment of recycled paper mill wastewater.  - journal of environmental management.  115-124. 

nurull muna daud, siti rozaimah sheikh abdullah, hassimi abu hasan & zahira yaakob.  (2015).  production of biodiesel and its wastewater treatment technologies: a review.  - process safety and environmental protection.  487-508. 

ong c.b., mohammad a.w., abdullah s.r.s., hasan h.a., koo c.h..  (2015).  pilot study for sewage wastewater reclamation and reuse using ro membrane: comparison of different pre-treatment systems.  - desalination and water treatment.  900-907. 

n.m. daud, h. abu hasan, s.r. sheikh abdullah.  (2014).  review: application coagulation-biological aerated filter (cbaf) system for biodiesel wastewater treatment.  - australian journal of basic and applied sciences.  296-298. 

israa abdulwahab albaldawi, siti rozaimah sheikh abdullah, hassimi abu hasan, fatihah suja, nurina anuar & mushrifah idris.  (2014).  optimized conditions for phytoremediation of diesel by scirpus grossus in horizontal subsurface flow constructed wetlands using (hsfcws) response surface methodology.  - journal of environmental management.  140:152-159. 

omar hamed jehawi, siti rozaimah sheikh abdullah, hassimi abu hasan, nurina anuar, mushrifah idris, nadya hussin al sbani, nur izzati ismail.  (2014).  a reed bed system for the treatment of domestic wastewater and micropollutants.  - australian journal of basic and applied sciences.  280-283. 

muhammad said, abdul wahab mohammad, mohd tusirin mohd nor, siti rozaimah sheikh abdullah and hassimi abu hasan.  (2014).  chemical cleaning of fouled polyethersulphone membranes during ultrafiltration of palm oil mill effluent.  - membrane water treatment.  207-219. 

chin boon ong, abdul wahab mohammad, siti rozaimah sheikh abdullah, hassimi abu hasan, chai hoon koo.  (2014).  pilot study for sewage wastewater reclamation and reuse using ro membrane: comparison of different pre-treatment systems.  - desalination and water treatment.  1-8. 

hassimi abu hasan, siti rozaimah sheikh abdullah, siti kartom kamarudin, noorhisham tan kofli and nurina anuar.  (2014).  kinetic evaluation of simultaneous cod, ammonia and manganese removal from drinking water using a biological aerated filter system.  - separation and purification technology.  130:56-64. 

hassimi abu hasan, siti rozaimah sheikh abdullah, siti kartom kamarudin, noorhisham tan kofli.  (2013).  on-off control of aeration time in the simultaneous removal of ammonia and manganese using a biological aerated filter system.  - process safety and environmental protection.  91:415-422. 

hassimi abu hasan, siti rozaimah sheikh abdullah, siti kartom kamarudin, noorhisham tan kofli, nurina anuar.  (2013).  simultaneous nh4+-n and mn2+ removal from drinking water using a biological aerated filter system: effects of different aeration rates.  - separation and purification technology.  118:547-556. 

chin boon ong, abdul wahab mohammad, siti rozaimah sheikh abdullah, hassimi abu hasan.  (2013).  performance investigation of pilot study for wastewater reclamation using ferric chloride as coagulant.  - jurnal teknologi.  95-99.