title: Integrated expanded granular sludge bed and sequential batch reactor treating beet sugar industrial wastewater and recovering bioenergy.
abstract: The exponential rise in energy demand vis-à-vis depletion of mineral oil resources has accelerated recovery of bioenergy from organic waste. In this study, a laboratory-scale anaerobic (An)/aerobic (Ar) system comprising of expanded granular sludge bed (EGSB) reactor coupled to an aerobic sequential batch reactor (SBR) was constructed to treat beet sugar industrial wastewater (BSIW) of chemical oxygen demand (COD) 1665 mg L-1while harnessing methane gas. The EGSB reactor generated methane at the rate of 235 mL/g COD added, with considerably higher than previously reported methane content of 86 %. Meanwhile, contaminants were successfully reduced in the combined An/Ar system, realizing a removal rate of more than 71.4, 97.3, 97.7, and 99.3 % of organic matter as total phosphorus, total nitrogen, biological oxygen demand (BOD), and soluble COD, respectively. Microbial community analysis showed that the bacterial genus Clostridium sp. and archaeal genus Methanosaeta sp. dominated the EGSB reactor, while Rhodobacter sp. dominance was observed in the SBR. The obtained experimental results indicate that the integration of expanded granular sludge bed and sequential batch reactor in treating BSIW obtained competitively outstanding performance.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, People's Republic of China.
authors.forename: Ambuchi John
authors.initials: AJ
authors.lastname: Justo
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, People's Republic of China.
authors.forename: Liu
authors.initials: L
authors.lastname: Junfeng
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, People's Republic of China.
authors.forename: Shan
authors.initials: S
authors.lastname: Lili
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, People's Republic of China.
authors.forename: Wang
authors.initials: W
authors.lastname: Haiman
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, People's Republic of China.
authors.forename: Moirana Ruth
authors.initials: MR
authors.lastname: Lorivi
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, People's Republic of China.
authors.forename: Mohammed O A
authors.initials: MO
authors.lastname: Mohammed
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, People's Republic of China.
authors.forename: Zhou
authors.initials: Z
authors.lastname: Xiangtong
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin, 150090, People's Republic of China. yujief@hit.edu.cn.
authors.forename: Feng
authors.initials: F
authors.lastname: Yujie
mesh_terms: D000332:Aerobiosis; D000693:Anaerobiosis; D027461:Beta vulgaris; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology; D003013:Clostridium / Q000378:metabolism; D007220:Industrial Waste; D008697:Methane / Q000096:biosynthesis; D019640:Methanosarcinales / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism; D016992:Rhodobacter / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater; D014874:Water Pollutants, Chemical / Q000378:metabolism
chemical_list: D007220:Industrial Waste; D008697:Methane; D009584:Nitrogen; D010758:Phosphorus; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Aerobic system; Anaerobic system; Biogas production; Mesophilic condition; Microbial community analysis; Wastewater treatment