title: Cultivation of Chlorella vulgaris JSC-6 with swine wastewater for simultaneous nutrient/COD removal and carbohydrate production.
abstract: Swine wastewater, containing a high concentration of COD and ammonia nitrogen, is suitable for the growth of microalgae, leading to simultaneous COD/nutrients removal from the wastewater. In this study, an isolated carbohydrate-rich microalga Chlorella vulgaris JSC-6 was adopted to perform swine wastewater treatment. Nearly 60-70% COD removal and 40-90% NH3-N removal was achieved in the mixotrophic and heterotrophic culture, depending on the dilution ratio of the wastewater, while the highest removal percentage was obtained with 20-fold diluted wastewater. Mixotrophic cultivation by using fivefold diluted wastewater resulted in the highest biomass concentration of 3.96 g/L. The carbohydrate content of the microalga grown on the wastewater can reach up to 58% (per dry weight). The results indicated that the microalgae-based wastewater treatment can efficiently reduce the nutrients and COD level, and the resulting microalgal biomass had high carbohydrate content, thereby having potential applications for the fermentative production of biofuels or chemicals.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China.
authors.forename: Wanqian
authors.initials: W
authors.lastname: Guo
authors.affiliation: Department of Chemical and Material Engineering, Tunghai University, Taichung, Taiwan.
authors.forename: Hong-Wei
authors.initials: HW
authors.lastname: Yen
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China.
authors.forename: Shih-Hsin
authors.initials: SH
authors.lastname: Ho
authors.affiliation: Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan.
authors.forename: Yung-Chung
authors.initials: YC
authors.lastname: Lo
authors.affiliation: Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan.
authors.forename: Chieh-Lun
authors.initials: CL
authors.lastname: Cheng
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China.
authors.forename: Nanqi
authors.initials: N
authors.lastname: Ren
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China; Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan; Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 701, Taiwan. Electronic address: changjs@mail.ncku.edu.tw.
authors.forename: Jo-Shu
authors.initials: JS
authors.lastname: Chang
mesh_terms: D000818:Animals; D056804:Biofuels; D057919:Biological Oxygen Demand Analysis; D018533:Biomass; D050260:Carbohydrate Metabolism; D002241:Carbohydrates / Q000032:analysis; D048408:Chlorella vulgaris / Q000254:growth & development* / Q000378:metabolism; D005947:Glucose / Q000378:metabolism; D052836:Heterotrophic Processes; D008372:Manure; D058086:Microalgae / Q000254:growth & development / Q000378:metabolism; D013552:Swine; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry
chemical_list: D056804:Biofuels; D002241:Carbohydrates; D005947:Glucose; D008372:Manure; D062065:Wastewater
keywords: Carbohydrate; Chlorella vulgaris; Heterotrophic growth; Mixotrophic growth; Swine wastewater