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Indexed by:期刊论文

Date of Publication:2012-08-01

Journal:WASTE MANAGEMENT

Included Journals:EI、SCIE、PubMed、ESI高被引论文

Volume:32

Issue:8

Page Number:1509-1515

ISSN No.:0956-053X

Key Words:Anaerobic digestion; Cobalt; Food waste; Iron; Trace element

Abstract:The purpose of this study was to examine if long-term anaerobic digestion of food waste in a semi-continuous single-stage reactor could be stabilized by supplementing trace elements. Contrary to the failure of anaerobic digestion of food waste alone, stable anaerobic digestion of food waste was achieved for 368 days by supplementing trace elements. Under the conditions of OLR (organic loading rates) of 2.19-6.64 g VS (volatile solid)/L day and 20-30 days of HRT (hydraulic retention time), a high methane yield (352-450 mL CH4/g VSadded) was obtained, and no significant accumulation of volatile fatty acids was observed. The subsequent investigation on effects of individual trace elements (Co, Fe, Mo and Ni) showed that iron was essential for maintaining stable methane production. These results proved that the food waste used in this study was deficient in trace elements. (c) 2012 Published by Elsevier Ltd.