title: Reuse of effluent water from a municipal wastewater treatment plant in microalgae cultivation for biofuel production.
abstract: This study assessed the usability of effluent water discharged from a secondary municipal wastewater treatment plant for mass cultivation of microalgae for biofuel production. It was observed that bacteria and protozoa in the effluent water exerted a negative impact on the growth of Chlorella sp. 227. To reduce the effect, filtration or UV-radiation were applied on the effluent water as pre-treatment methods. Of all the pretreatment options tested, the filtration (by 0.2 μm) resulted in the highest biomass and lipid productivity. To be comparable with the growth in the autoclaved effluent water, the filtration with a proper pore size filter (less than 0.45 μm) or UV-B radiation of a proper dose (over 1620 mJ cm(-2)) are proposed. These findings led us to conclude that the utilization can be realized only when bacteria and other microorganisms are greatly reduced or eliminated from the effluent prior to its use.
authors.affiliation: Department of Civil and Environmental Engineering, Pusan National University, Busan 609-735, Republic of Korea.
authors.forename: Sunja
authors.initials: S
authors.lastname: Cho
authors.forename: Thanh Thao
authors.initials: TT
authors.lastname: Luong
authors.forename: Dukhaeng
authors.initials: D
authors.lastname: Lee
authors.forename: You-Kwan
authors.initials: YK
authors.lastname: Oh
authors.forename: Taeho
authors.initials: T
authors.lastname: Lee
mesh_terms: D056804:Biofuels / Q000032:analysis*; D001709:Biotechnology / Q000379:methods*; D002244:Carbon / Q000032:analysis; D002708:Chlorella / Q000254:growth & development; D002947:Cities; D004952:Esters / Q000032:analysis; D058086:Microalgae / Q000254:growth & development*; D009584:Nitrogen / Q000032:analysis; D009930:Organic Chemicals / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D059027:Recycling; D014865:Waste Disposal, Fluid; D018508:Water Purification / Q000379:methods*
chemical_list: D056804:Biofuels; D004952:Esters; D009930:Organic Chemicals; D010758:Phosphorus; D002244:Carbon; D009584:Nitrogen