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Experimental Study on Two-Phase Mesophilic Anaerobic Co-Digestion for Kitchen Waste and Sewage Sludge
Pages: 54-57,71
Year: Issue:  1
Journal: Water Purification Technology

Keyword:  kitchen wastesewage sludgetwo-phase co-digestionmesophilic anaerobic digestion methaneproduction;
Abstract: The impact of mixing proportion and sludge retention time on two-phase mesophilic anaerobic co-digestion for kitchen waste and sewage sludge was studied under mixing ratios of 1∶3 and 1∶1 on TS basis. Under the mixing ratio of 1∶1,more biogas was produced and more organic pollutants were removed,while better operation stability was observed,simultaneously. With the increase of sludge retention time,organic load and methane production rate of the two-phase co-digestion system decreased accordingly,while the biogas yield as well as organic pollutants removal rate increased,gradually. Under the mixing ratio of 1∶1,25 d was proved to be the optimum SRT of two-phase anaerobic co-digestion system while methane content,methane production rate,special methane production and VS removal rate reached 71%,0. 7 L/L·d,0. 69 L/gVSremoved and 64. 7%,respectively.
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