title: Importance of storage time in mesophilic anaerobic digestion of food waste.
abstract: Storage was used as a pretreatment to enhance the methanization performance of mesophilic anaerobic digestion of food waste. Food wastes were separately stored for 0, 1, 2, 3, 4, 5, 7, and 12days, and then fed into a methanogenic reactor for a biochemical methane potential (BMP) test lasting up to 60days. Relative to the methane production of food waste stored for 0-1day (285-308mL/g-added volatile solids (VSadded)), that after 2-4days and after 5-12days of storage increased to 418-530 and 618-696mL/g-VSadded, respectively. The efficiency of hydrolysis and acidification of pre-stored food waste in the methanization reactors increased with storage time. The characteristics of stored waste suggest that methane production was not correlated with the total hydrolysis efficiency of organics in pre-stored food waste but was positively correlated with the storage time and acidification level of the waste. From the results, we recommend 5-7days of storage of food waste in anaerobic digestion treatment plants.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuses, Tongji University, Shanghai 200092, China. Electronic address: lvfan.rhodea@tongji.edu.cn.
authors.forename: Fan
authors.initials: F
authors.lastname: Lü
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuses, Tongji University, Shanghai 200092, China.
authors.forename: Xian
authors.initials: X
authors.lastname: Xu
authors.affiliation: Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, 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, Shanghai 200092, China.
authors.forename: Liming
authors.initials: L
authors.lastname: Shao
authors.affiliation: Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, 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, Shanghai 200092, China. Electronic address: solidwaste@tongji.edu.cn.
authors.forename: Pinjing
authors.initials: P
authors.lastname: He
mesh_terms: D000693:Anaerobiosis; D005502:Food; D008697:Methane / Q000032:analysis; D012037:Refuse Disposal / Q000379:methods*; D014866:Waste Products / Q000032:analysis*
chemical_list: D014866:Waste Products; D008697:Methane
keywords: Bio-pretreatment; Biochemical methane potential; Fermentation; Food waste; Hydrolysates; Storage