title: Evaluation and characterization during the anaerobic digestion of high-strength kitchen waste slurry via a pilot-scale anaerobic membrane bioreactor.
abstract: The anaerobic digestion of high-strength kitchen waste slurry via a pilot-scale anaerobic membrane bioreactor (AnMBR) was investigated at two different operational modes, including no sludge discharge and daily sludge discharge of 20 L. The AnMBR provided excellent and reliable permeate quality with high COD removal efficiencies over 99%. The obvious accumulations of long chain fatty acids (LCFAs) and Ca(2+) were found in the anaerobic digester by precipitation and agglomeration. Though the physicochemical process contributed to attenuating the free LCFAs toxicity on anaerobic digestion, the digestion efficiency was partly influenced for the low bioavailability of those precipitates. Moreover, higher organic loading rate (OLR) of 5.8 kg COD/(m(3) d) and digestion efficiency of 78% were achieved as the AnMBR was stably operated with sludge discharge, where the membrane fouling propensity was also alleviated, indicating the crucial significance of SRT control on the treatment of high-strength kitchen waste slurry via AnMBRs.
authors.affiliation: School of Evironmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, PR China.
authors.forename: Xiaolan
authors.initials: X
authors.lastname: Xiao
authors.affiliation: School of Evironmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, PR China.
authors.forename: Zhenxing
authors.initials: Z
authors.lastname: Huang
authors.affiliation: School of Evironmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, PR China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou 215009, PR China. Electronic address: wqruanjn@gmail.com.
authors.forename: Wenquan
authors.initials: W
authors.lastname: Ruan
authors.affiliation: School of Evironmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, PR China.
authors.forename: Lintao
authors.initials: L
authors.lastname: Yan
authors.affiliation: School of Evironmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, PR China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou 215009, PR China.
authors.forename: Hengfeng
authors.initials: H
authors.lastname: Miao
authors.affiliation: School of Evironmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, PR China.
authors.forename: Hongyan
authors.initials: H
authors.lastname: Ren
authors.affiliation: School of Evironmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, PR China.
authors.forename: Mingxing
authors.initials: M
authors.lastname: Zhao
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D005374:Filtration / Q000295:instrumentation* / Q000379:methods; D008567:Membranes, Artificial; D012722:Sewage / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods
chemical_list: D008567:Membranes, Artificial; D012722:Sewage; D062065:Wastewater
keywords: Anaerobic digestion; Anaerobic membrane bioreactor (AnMBR); Kitchen waste slurry; Long chain fatty acids (LCFAs); Membrane fouling