title: Effects of total solids content on performance of sludge mesophilic anaerobic digestion and dewaterability of digested sludge.
abstract: The role of total solids (TS) content on sludge mesophilic anaerobic digestion (AD) was investigated in batch reactors. A range of TS below 10% was evaluated with two replicates. The volumetric biogas production rate (VBPR) increased with increasing initial TS. On day 5, VBPR increased from 133.2±11.2mLL-1d-1at TS 2% to 1111.7±58.1mLL-1d-1at TS 10%. The ultimate biogas yield (P) firstly increased and then decreased with the increasing TS. The greatest P was 246.8mLg-1-VSaddedat TS 8%. The corresponding free ammonia nitrogen (FAN) and total ammonia nitrogen (TAN) were 84.0±16.1 and 1163.0±108.6mgL-1, respectively. Normalized capillary suction time (NCST) and solid content of thickened sludge obtained by centrifuging sludge increased with increasing TS. On day 49, NCST were 1.2±0.2 (TS=2%) and 13.2±1.1 (TS=10%)sg-1-TS. Meanwhile, solid content of thickened sludge was 7.5±0.5 (TS=2%) and 15.4±0.0% (TS=10%). In summary, high VBPR and dewatering effects were obtained after TS content optimization.
authors.affiliation: School of Chemistry and Environmental Engineering, Jiujiang University, Jiujiang 332005, PR China.
authors.forename: Dong
authors.initials: D
authors.lastname: An
authors.affiliation: School of Chemistry and Environmental Engineering, Jiujiang University, Jiujiang 332005, PR China; Jiangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang 332005, PR China; Jiujiang Key Laboratory of Basin Management and Ecological Protection, Jiujiang 332005, PR China. Electronic address: gloomysmile@163.com.
authors.forename: Tianfeng
authors.initials: T
authors.lastname: Wang
authors.affiliation: Beijing Municipal Engineering Professional Design Institute Co., Ltd, Beijing 100037, PR China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhou
authors.affiliation: School of Chemistry and Environmental Engineering, Jiujiang University, Jiujiang 332005, PR China.
authors.forename: Chaosheng
authors.initials: C
authors.lastname: Wang
authors.affiliation: School of Chemistry and Environmental Engineering, Jiujiang University, Jiujiang 332005, PR China.
authors.forename: Qiyong
authors.initials: Q
authors.lastname: Yang
authors.affiliation: School of Chemistry and Environmental Engineering, Jiujiang University, Jiujiang 332005, PR China.
authors.forename: Bingjie
authors.initials: B
authors.lastname: Xu
authors.affiliation: College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China.
authors.forename: Qingfang
authors.initials: Q
authors.lastname: Zhang
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000693:Anaerobiosis; D003890:Desiccation; D008697:Methane / Q000032:analysis; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D000393:Air Pollutants; D012722:Sewage; D008697:Methane
keywords: Ammonia; Dewaterability; Extracellularpolymeric substances (EPS); Ultimate biogas yield (P); Volumetric biogas production rate (VBPR)