title: Simultaneous nutrient removal, optimised CO2 mitigation and biofuel feedstock production by Chlorogonium sp. grown in secondary treated non-sterile saline sewage effluent.
abstract: The phycoremediation process has great potential for effectively addressing environmental pollution. To explore the capabilities of simultaneous algal nutrient removal, CO2 mitigation and biofuel feedstock production from spent water resources, a Chlorogonium sp. isolated from a tilapia pond in Hong Kong was grown in non-sterile saline sewage effluent for a bioremediation study. With high removal efficiencies of NH3-N (88.35±14.39%), NO3(-)-N (85.39±14.96%), TN (93.34±6.47%) and PO4(3-)-P (91.80±17.44%), Chlorogonium sp. achieved a CO2 consumption rate of 58.96 mg L(-1) d(-1), which was optimised by the response surface methodology. Under optimised conditions, the lipid content of the algal biomass reached 24.26±2.67%. Overall, the isolated Chlorogonium sp. showed promising potential in the simultaneous purification of saline sewage effluent in terms of tertiary treatment and CO2 sequestration while delivering feedstock for potential biofuel production in a waste-recycling manner.
authors.affiliation: School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China.
authors.forename: Kwan Yin
authors.initials: KY
authors.lastname: Lee
authors.affiliation: School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China.
authors.forename: Tsz Wai
authors.initials: TW
authors.lastname: Ng
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
authors.forename: Guiying
authors.initials: G
authors.lastname: Li
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
authors.forename: Taicheng
authors.initials: T
authors.lastname: An
authors.affiliation: School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China.
authors.forename: Ka Ki
authors.initials: KK
authors.lastname: Kwan
authors.affiliation: School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China.
authors.forename: King Ming
authors.initials: KM
authors.lastname: Chan
authors.affiliation: School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China.
authors.forename: Guocheng
authors.initials: G
authors.lastname: Huang
authors.affiliation: School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China.
authors.forename: Ho Yin
authors.initials: HY
authors.lastname: Yip
authors.affiliation: School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China. Electronic address: pkwong@cuhk.edu.hk.
authors.forename: Po Keung
authors.initials: PK
authors.lastname: Wong
mesh_terms: D001673:Biodegradation, Environmental; D056804:Biofuels; D018533:Biomass; D002245:Carbon Dioxide / Q000737:chemistry*; D000460:Chlorophyta / Q000378:metabolism*; D006723:Hong Kong; D006863:Hydrogen-Ion Concentration; D008055:Lipids / Q000737:chemistry; D058086:Microalgae / Q000378:metabolism; D009584:Nitrogen / Q000737:chemistry; D010101:Oxygen Consumption; D058433:Photobioreactors; D061005:Ponds; D012492:Salts / Q000737:chemistry; D012722:Sewage; D013499:Surface Properties; D014865:Waste Disposal, Fluid / Q000379:methods; D062065:Wastewater; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification / Q000379:methods*
chemical_list: D056804:Biofuels; D002245:Carbon Dioxide; D008055:Lipids; D009584:Nitrogen; D012492:Salts; D012722:Sewage; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Algal biofuel; CO(2) capture; Microalgae; Phycoremediation; Saline sewage effluent treatment