title: Mixotrophic cultivation of a microalga Scenedesmus obliquus in municipal wastewater supplemented with food wastewater and flue gas CO2 for biomass production.
abstract: The biomass and lipid/carbohydrate production by a green microalga Scenedesmus obliquus under mixotrophic condition using food wastewater and flue gas CO2 with municipal wastewater was investigated. Different dilution ratios (0.5-2%) of municipal wastewater with food wastewater were evaluated in the presence of 5, 10 and 14.1% CO2. The food wastewater (0.5-1%) with 10-14.1% CO2 supported the highest growth (0.42-0.44 g L(-1)), nutrient removal (21-22 mg TN L(-1)), lipid productivity (10-11 mg L(-1)day(-1)) and carbohydrate productivity (13-16 mg L(-1)day(-1)) by S. obliquus after 6 days of cultivation. Food wastewater increased the palmitic and oleic acid contents up to 8 and 6%, respectively. Thus, application of food wastewater and flue gas CO2 can be employed for enhancement of growth, lipid/carbohydrate productivity and wastewater treatment efficiency of S. obliquus under mixotrophic condition, which can lead to development of a cost effective strategy for microalgal biomass production.
authors.affiliation: Green City Technology Institute, Korea Institute of Science and Technology, Seoul 136-791, South Korea.
authors.forename: Min-Kyu
authors.initials: MK
authors.lastname: Ji
authors.affiliation: Green City Technology Institute, Korea Institute of Science and Technology, Seoul 136-791, South Korea.
authors.forename: Hyun-Shik
authors.initials: HS
authors.lastname: Yun
authors.affiliation: Green City Technology Institute, Korea Institute of Science and Technology, Seoul 136-791, South Korea.
authors.forename: Young-Tae
authors.initials: YT
authors.lastname: Park
authors.affiliation: Department of Natural Resources and Environmental Engineering, Hanyang University, Seoul 133-791, South Korea.
authors.forename: Akhil N
authors.initials: AN
authors.lastname: Kabra
authors.affiliation: Green City Technology Institute, Korea Institute of Science and Technology, Seoul 136-791, South Korea.
authors.forename: In-Hwan
authors.initials: IH
authors.lastname: Oh
authors.affiliation: Green City Technology Institute, Korea Institute of Science and Technology, Seoul 136-791, South Korea. Electronic address: jchoi@kist.re.kr.
authors.forename: Jaeyoung
authors.initials: J
authors.lastname: Choi
mesh_terms: D056804:Biofuels; D018533:Biomass; D050260:Carbohydrate Metabolism; D002245:Carbon Dioxide / Q000737:chemistry / Q000378:metabolism*; D005502:Food; D050356:Lipid Metabolism; D044444:Scenedesmus / Q000254:growth & development / Q000378:metabolism / Q000502:physiology*; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D056804:Biofuels; D002245:Carbon Dioxide; D062065:Wastewater
keywords: Bio-energy; Biomass; Flue gas CO(2); Food wastewater; Scenedesmus obliquus