Anaerobic co-digestion of food waste and piggery wastewater: Focusing on the role of trace elements

作者：Zhang Lei; Lee Yong Woo; Jahng Deokjin^*

来源：Bioresource Technology, 2011, 102(8): 5048-5059.

DOI：10.1016/j.biortech.2011.01.082

• Anaerobic digestion
• Co-digestion
• Food waste
• Piggery wastewater
• Trace elements

The objective of this study was to evaluate the feasibility of anaerobic co-digestion of food waste and piggery wastewater, and to identify the key factors governing the co-digestion performance. The analytical results indicated that the food waste contained higher energy potential and lower concentrations of trace elements than the piggery wastewater. Anaerobic co-digestion showed a significantly improved biogas productivity and process stability. The results of co-digestion of the food waste with the different fractions of the piggery wastewater suggested that trace element might be the reason for enhancing the co-digestion performance. By supplementing the trace elements, a long-term anaerobic digestion of the food waste only resulted in a high methane yield of 0.396 m(3)/kg VS(added) and 75.6% of VS destruction with no significant volatile fatty acid accumulation. These results suggested that the typical Korean food waste was deficient with some trace elements required for anaerobic digestion.

• 出版日期2011-4