title: Integrated approach to sustain biogas production in anaerobic digestion of chicken manure under recycled utilization of liquid digestate: Dynamics of ammonium accumulation and mitigation control.
abstract: The dynamics of ammonium accumulation and mitigation control in anaerobic digestion of chicken manure under the recycled utilization of liquid digested slurry were investigated by using an integrated approach in two laboratory-scale semi-continuously stirred tank reactors. In the reactor with direct recycled utilization of the anaerobic digested liquid slurry, total volatilized fatty acids (in CH3COOH) and NH4(+)-N increased from 1600mg/L to 8000mg/L and from 2600mg/L to 5000mg/L, respectively. The daily volumetric biogas production decreased from 1.4±0.1L/(L·d) to 0.8±0.1L/(L·d) with a reduction efficiency of 43±4%. Air stripping was integrated for ammonium mitigation of recycled liquid digested slurry and was shown to effectively reduce the ammonium to 3000mg/L. Correspondingly, the biogas production was recovered back to 1.4±0.1L/(L·d). This indicated the potential of the integration of air stripping for ammonium mitigation in an anaerobic digestion process with liquid digested slurry recirculation.
authors.affiliation: Key Laboratory of Clean Utilization Technology for Renewable Energy in Ministry of Agriculture, College of Engineering, China Agricultural University, Beijing, PR China.
authors.forename: Shubiao
authors.initials: S
authors.lastname: Wu
authors.affiliation: Key Laboratory of Clean Utilization Technology for Renewable Energy in Ministry of Agriculture, College of Engineering, China Agricultural University, Beijing, PR China.
authors.forename: Ping
authors.initials: P
authors.lastname: Ni
authors.affiliation: Key Laboratory of Clean Utilization Technology for Renewable Energy in Ministry of Agriculture, College of Engineering, China Agricultural University, Beijing, PR China.
authors.forename: Jiaxi
authors.initials: J
authors.lastname: Li
authors.affiliation: Key Laboratory of Clean Utilization Technology for Renewable Energy in Ministry of Agriculture, College of Engineering, China Agricultural University, Beijing, PR China.
authors.forename: Hao
authors.initials: H
authors.lastname: Sun
authors.affiliation: Key Laboratory of Clean Utilization Technology for Renewable Energy in Ministry of Agriculture, College of Engineering, China Agricultural University, Beijing, PR China.
authors.forename: Yanfei
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Key Laboratory of Clean Utilization Technology for Renewable Energy in Ministry of Agriculture, College of Engineering, China Agricultural University, Beijing, PR China.
authors.forename: Hongzhen
authors.initials: H
authors.lastname: Luo
authors.affiliation: Institute of Biosystems Engineering, Poznan University of Life Sciences, Poland.
authors.forename: Jacek
authors.initials: J
authors.lastname: Dach
authors.affiliation: Key Laboratory of Clean Utilization Technology for Renewable Energy in Ministry of Agriculture, College of Engineering, China Agricultural University, Beijing, PR China. Electronic address: wushubiao@gmail.com.
authors.forename: Renjie
authors.initials: R
authors.lastname: Dong
mesh_terms: D064751:Ammonium Compounds / Q000032:analysis*; D000818:Animals; D056804:Biofuels; D019149:Bioreactors; D002645:Chickens; D005232:Fatty Acids, Volatile / Q000032:analysis; D008372:Manure; D059027:Recycling
chemical_list: D064751:Ammonium Compounds; D056804:Biofuels; D005232:Fatty Acids, Volatile; D008372:Manure
keywords: Air stripping; Ammonium inhibition; Anaerobic digestion; Chicken manure; Effluent recirculation