title: Digestion and dewatering characteristics of waste activated sludge treated by an anaerobic biofilm system.
abstract: Immobilization of microorganisms for sludge anaerobic digestion was investigated in this study. The effects of filler properties on anaerobic digestion and dewaterability of waste activated sludge were assessed at mesophilic temperature in batch mode. The results showed that the duration of the methanogenic stage of reactors without filler, with only filler, and with pre-incubated filler was 39days, 19days and 13days, respectively, during which time the protein was degraded by 45.0%, 29.4% and 30.0%, and the corresponding methane yield was 193.9, 107.2 and 108.2mL/g volatile suspended solids added, respectively. On day 39, the final protein degradation efficiency of the three reactors was 45.0%, 40.9% and 42.0%, respectively. The results of normalized capillary suction time and specific resistance to filtration suggested that the reactor incorporating pre-incubated filler could improve the dewaterability of digested sludge, while the effect of the reactor incorporating only filler on sludge dewaterability was uncertain.
authors.affiliation: State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai 200092, PR China.
authors.forename: Tianfeng
authors.initials: T
authors.lastname: Wang
authors.affiliation: Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, PR China; Centre for the Technology Research and Training on Household Waste in Small Towns & Rural Area, Ministry of Housing and Urban-Rural Development of PR China (MOHURD), PR China.
authors.forename: Liming
authors.initials: L
authors.lastname: Shao
authors.affiliation: State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai 200092, PR China.
authors.forename: Tianshui
authors.initials: T
authors.lastname: Li
authors.affiliation: State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai 200092, PR China; Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, PR China.
authors.forename: Fan
authors.initials: F
authors.lastname: Lü
authors.affiliation: State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai 200092, PR China; Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, PR China; Centre for the Technology Research and Training on Household Waste in Small Towns & Rural Area, Ministry of Housing and Urban-Rural Development of PR China (MOHURD), PR China. Electronic address: solidwaste@tongji.edu.cn.
authors.forename: Pinjing
authors.initials: P
authors.lastname: He
mesh_terms: D000693:Anaerobiosis; D001426:Bacterial Proteins / Q000378:metabolism; D001673:Biodegradation, Environmental; D018441:Biofilms; D001704:Biopolymers / Q000032:analysis; D019149:Bioreactors / Q000382:microbiology; D005374:Filtration; D008697:Methane / Q000032:analysis; D010100:Oxygen / Q000032:analysis; D010316:Particle Size; D012722:Sewage / Q000382:microbiology*; D013997:Time Factors; D014835:Volatilization; D062065:Wastewater / Q000382:microbiology*; D018508:Water Purification / Q000379:methods*
chemical_list: D001426:Bacterial Proteins; D001704:Biopolymers; D008697:Methane; D010100:Oxygen; D012722:Sewage; D062065:Wastewater
keywords: Anaerobic digestion; Dewaterability; Filler; Microorganism immobilization; Waste activated sludge