title: Performance evaluation of a novel anaerobic digestion operation process for treating high-solids content chicken manure: Effect of reduction of the hydraulic retention time at a constant organic loading rate.
abstract: A novel feeding strategy was adopted in this study and the effect of reduction in hydraulic retention time (HRT) on the anaerobic digestion of chicken manure (CM) with a constant organic loading rate of 6.0gVS/L/d was investigated. The lab-scale CSTR was operated at 38°C and HRTCMwas reduced from 52days to 5days. At HRTCMof 20-45days, the reactor was relatively stable in terms of the volumetric biogas production rates and specific biogas production (SBP), which were 2.2-2.4L/L/d and 338.3-418.7mL/gVSadded, respectively. However, process instability and VFA accumulation occurred when the HRTCMwas reduced to 10days due to excess microbes washout. The reduction in HRTCMto 5days caused SBP to decrease to 198.7mL/gVSaddedand the acetic acid content to exceed 6000mg/L. The biomass balance model showed that the biomass concentration at HRTCMof 20-52days (0.473-0.615gVSS/L) was notably higher than that at HRTCMof 5-10days (0.173gVSS/L).
authors.affiliation: Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China; College of Engineering (Biomass Engineering Center), China Agricultural University, Beijing 100083, PR China. Electronic address: zhang394982409@126.com.
authors.forename: Wanqin
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, PR China.
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Lang
authors.affiliation: Department of Biochemical Conversion, Deutsches Biomasseforschungszentrum gemeinnützige GmbH (DBFZ), Leipzig 04347, Germany.
authors.forename: Zhendong
authors.initials: Z
authors.lastname: Pan
authors.affiliation: Department of Biochemical Conversion, Deutsches Biomasseforschungszentrum gemeinnützige GmbH (DBFZ), Leipzig 04347, Germany.
authors.forename: Yingqing
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: Department of Biochemical Conversion, Deutsches Biomasseforschungszentrum gemeinnützige GmbH (DBFZ), Leipzig 04347, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Liebetrau
authors.affiliation: Department of Biochemical Conversion, Deutsches Biomasseforschungszentrum gemeinnützige GmbH (DBFZ), Leipzig 04347, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Nelles
authors.affiliation: Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China.
authors.forename: Hongmin
authors.initials: H
authors.lastname: Dong
authors.affiliation: College of Engineering (Biomass Engineering Center), China Agricultural University, Beijing 100083, PR China.
authors.forename: Renjie
authors.initials: R
authors.lastname: Dong
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D056804:Biofuels; D019149:Bioreactors; D002645:Chickens; D008372:Manure; D008697:Methane
chemical_list: D056804:Biofuels; D008372:Manure; D008697:Methane
keywords: Ammonia inhibition; Anaerobic digestion; Biomass yield; Chicken manure; Hydraulic retention time; Kinetics