title: High-strength fermentable wastewater reclamation through a sequential process of anaerobic fermentation followed by microalgae cultivation.
abstract: In this study, the sequential process of anaerobic fermentation followed by microalgae cultivation was evaluated from both nutrient and energy recovery standpoints. The effects of different fermentation type on the biogas generation, broth metabolites' composition, algal growth and nutrients' utilization, and energy conversion efficiencies for the whole processes were discussed. When the fermentation was designed to produce hydrogen-dominating biogas, the total energy conversion efficiency (TECE) of the sequential process was higher than that of the methane fermentation one. With the production of hydrogen in anaerobic fermentation, more organic carbon metabolites were left in the broth to support better algal growth with more efficient incorporation of ammonia nitrogen. By applying the sequential process, the heat value conversion efficiency (HVCE) for the wastewater could reach 41.2%, if methane was avoided in the fermentation biogas. The removal efficiencies of organic metabolites and NH4+-N in the better case were 100% and 98.3%, respectively.
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China; CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China.
authors.forename: Wenqiang
authors.initials: W
authors.lastname: Qi
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
authors.forename: Taojing
authors.initials: T
authors.lastname: Chen
authors.affiliation: CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China. Electronic address: wangliang@sari.ac.cn.
authors.forename: Liang
authors.initials: L
authors.lastname: Wang
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
authors.forename: Minghong
authors.initials: M
authors.lastname: Wu
authors.affiliation: CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China.
authors.forename: Quanyu
authors.initials: Q
authors.lastname: Zhao
authors.affiliation: CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wei
mesh_terms: D056804:Biofuels / Q000382:microbiology; D019149:Bioreactors; D005285:Fermentation; D006859:Hydrogen / Q000378:metabolism; D008697:Methane / Q000378:metabolism; D058086:Microalgae / Q000378:metabolism; D062065:Wastewater; D018508:Water Purification / Q000379:methods*
chemical_list: D056804:Biofuels; D006859:Hydrogen; D008697:Methane; D062065:Wastewater
keywords: Energy; Fermentation; Hydrogen; Microalgae; Nutrient recovery; Wastewater