eprintid: 14946 rev_number: 2 eprint_status: archive userid: 1 dir: disk0/00/01/49/46 datestamp: 2023-11-10 03:29:32 lastmod: 2023-11-10 03:29:32 status_changed: 2023-11-10 01:58:14 type: article metadata_visibility: show creators_name: Leong, W.H. creators_name: Lim, J.W. creators_name: Lam, M.K. creators_name: Lam, S.M. creators_name: Sin, J.C. creators_name: Samson, A. title: Novel sequential flow baffled microalgal-bacterial photobioreactor for enhancing nitrogen assimilation into microalgal biomass whilst bioremediating nutrient-rich wastewater simultaneously ispublished: pub keywords: Flow rate; Nitrogen; Nutrients; Photobioreactors; Productivity; Wastewater treatment, Bacterial consortium; Biomass productivity; Extra-cellular polymeric substances; Hydraulic retention time; Nitrogen assimilation; Specific growth rate; Sustainable wastewater treatments; Synergistic interaction, Biomass, ammonia; arsenic; cadmium; copper; iron; manganese; nickel; nitrate; nitrite; nitrogen; zinc, biomass; bioreactor; bioremediation; concentration (composition); exopolymer; growth rate; microalga; wastewater; wastewater treatment; water treatment, activated sludge; algal growth; bacterium contamination; biomass; biomass production; bioremediation; biotransformation; carbon source; Chlorella vulgaris; community structure; continuous process; controlled study; daughter cell; flow rate; hydraulic retention time; inorganic nutrient; microalga; municipal wastewater; nitrification; nitrogen concentration; nitrogen fixation; nonhuman; nutrient uptake; polymerization; sewage treatment plant; titrimetry; waste water management; biomass; photobioreactor; wastewater, Bacteria (microorganisms), Biomass; Microalgae; Nitrogen; Nutrients; Photobioreactors; Waste Water note: cited By 42 abstract: A novel sequential flow baffled microalgal-bacterial (SFB-AlgalBac) photobioreactor was designed to cater for the synergistic interactions between microalgal and bacterial consortia to enhance nitrogen assimilation into microalgal biomass from nutrient-rich wastewater medium. The performance of the SFB-AlgalBac photobioreactor was found to be optimum at the influent flow rate of 5.0 L/d, equivalent to 20 days of hydraulic retention time (HRT). The highest microalgal nitrogen assimilation rate (0.0271 /d) and biomass productivity (1350 mg/d) were recorded amidst this flow rate. Further increase to the 10.0 L/d flow rate reduced the photobioreactor performance, as evidenced by a reduction in microalgal biomass productivity (>10). The microalgal biomass per unit of nitrogen assimilated values were attained at 16.69 mg/mg for the 5.0 L/d flow rate as opposed to 7.73 mg/mg for the 10.0 L/d flow rate, despite both having comparable specific growth rates. Also, the prior influent treatment by activated sludge was found to exude extracellular polymeric substances which significantly improved the microalgal biomass settleability up to 37. The employment of SFB-AlgalBac photobioreactor is anticipated could exploit the low-cost nitrogen sources from nutrient-rich wastewaters via bioconversion into valuable microalgal biomass while fulfilling the requirements of sustainable wastewater treatment technologies. © 2020 Elsevier B.V. date: 2021 publisher: Elsevier B.V. official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85095850402&doi=10.1016%2fj.jhazmat.2020.124455&partnerID=40&md5=6f0f6709081539a37bc74a21da298506 id_number: 10.1016/j.jhazmat.2020.124455 full_text_status: none publication: Journal of Hazardous Materials volume: 409 refereed: TRUE issn: 03043894 citation: Leong, W.H. and Lim, J.W. and Lam, M.K. and Lam, S.M. and Sin, J.C. and Samson, A. (2021) Novel sequential flow baffled microalgal-bacterial photobioreactor for enhancing nitrogen assimilation into microalgal biomass whilst bioremediating nutrient-rich wastewater simultaneously. Journal of Hazardous Materials, 409. ISSN 03043894