title: Anaerobic co-digestion of food waste and piggery wastewater: focusing on the role of trace elements.
abstract: 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.
authors.affiliation: Department of Environmental Engineering and Biotechnology, Myongji University, San 38-2, Namdong, Cheoin-Gu, Yongin, Gyeonggi-Do 449-728, Republic of Korea.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Yong-Woo
authors.initials: YW
authors.lastname: Lee
authors.forename: Deokjin
authors.initials: D
authors.lastname: Jahng
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D002849:Chromatography, Gas; D007220:Industrial Waste; D013058:Mass Spectrometry; D013552:Swine; D014131:Trace Elements / Q000378:metabolism*; D014873:Water Pollutants / Q000378:metabolism*
chemical_list: D007220:Industrial Waste; D014131:Trace Elements; D014873:Water Pollutants