title: Two-phase anaerobic co-digestion of food waste and sewage sludge.
abstract: The feasibility and performance of food waste and sewage sludge co-digestion were investigated to gain insight into their resource utilization. In this study, two-phase anaerobic digestion (TPAD) was operated under a total solids mixing ratio of 1:1 and different sludge retention times (SRTs). Results show that an acidogenic reactor with a 5-day SRT obtained the highest acidification efficiency, and its acetic acid content was dominant. The organic removal rate of a methanogenic reactor (MR) with a 20-day SRT and its corresponding TPAD system with a 25-day SRT were both the highest among the MRs and TPAD systems. Volatile solids and total chemical oxygen demand average removal efficiencies of the TPAD system with a 25-day SRT reached 64.7 and 60.8%, respectively. The MR with a 30-day SRT obtained the minimum ratio of volatile fatty acid to alkalinity (0.12). The methane content generated from the different MRs fluctuated at around 70%. All of the above results can provide reference for future research.
authors.affiliation: College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China E-mail: lwsds@163.com.
authors.forename: Feng
authors.initials: F
authors.lastname: Wang
authors.affiliation: College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China E-mail: lwsds@163.com.
authors.forename: Wei-Ying
authors.initials: WY
authors.lastname: Li
authors.affiliation: School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China.
authors.forename: Xue-Nong
authors.initials: XN
authors.lastname: Yi
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage / Q000032:analysis*; D062611:Solid Waste / Q000032:analysis*; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D012722:Sewage; D062611:Solid Waste