title: Scenedesmus-based treatment of nitrogen and phosphorus from effluent of anaerobic digester and bio-oil production.
abstract: In this study, a microalgae-based technology was employed to treat wastewater and produce biodiesel at the same time. A local isolate Scenedesmus sp. was found to be a well suited species, particularly for an effluent from anaerobic digester (AD) containing low carbon but high nutrients (NH3-N=273mgL(-1), total P=58.75mgL(-1)). This algae-based treatment was quite effective: nutrient removal efficiencies were over 99.19% for nitrogen and 98.01% for phosphorus. Regarding the biodiesel production, FAME contents of Scenedesmus sp. were found to be relatively low (8.74% (w/w)), but overall FAME productivity was comparatively high (0.03gL(-1)d(-1)) due to its high biomass productivity (0.37gL(-1)d(-1)). FAMEs were satisfactory to the several standards for the biodiesel quality. The Scenedesmus-based technology may serve as a promising option for the treatment of nutrient-rich wastewater and especially so for the AD effluent.
authors.affiliation: Department of Civil and Environmental Engineering, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea.
authors.forename: Ga-Yeong
authors.initials: GY
authors.lastname: Kim
authors.affiliation: College of Agriculture, Forestry and Natural Resource Management, University of Hawaii at Hilo, 200 W. Kawili St., Hilo, HI 96720, United States.
authors.forename: Yeo-Myeong
authors.initials: YM
authors.lastname: Yun
authors.affiliation: Department of Civil and Environmental Engineering, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea.
authors.forename: Hang-Sik
authors.initials: HS
authors.lastname: Shin
authors.affiliation: Sustainable Bioresource Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 305-806, Republic of Korea.
authors.forename: Hee-Sik
authors.initials: HS
authors.lastname: Kim
authors.affiliation: Department of Civil and Environmental Engineering, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea. Electronic address: hanj2@kaist.ac.kr.
authors.forename: Jong-In
authors.initials: JI
authors.lastname: Han
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D018533:Biomass; D019149:Bioreactors; D002244:Carbon; D005227:Fatty Acids / Q000032:analysis; D050356:Lipid Metabolism; D058086:Microalgae / Q000254:growth & development / Q000378:metabolism; D009584:Nitrogen / Q000032:analysis / Q000378:metabolism*; D010758:Phosphorus / Q000032:analysis / Q000378:metabolism*; D044444:Scenedesmus / Q000254:growth & development / Q000378:metabolism*; D062065:Wastewater / Q000032:analysis; D018508:Water Purification / Q000191:economics / Q000379:methods*
chemical_list: D056804:Biofuels; D002244:Carbon; D005227:Fatty Acids; D009584:Nitrogen; D010758:Phosphorus; D062065:Wastewater
keywords: Anaerobic digestion; Biodiesel; Nitrogen removal; Phosphorus removal; Scenedesmus sp.