Recent advances in anaerobic co-digestion of excess sludge and food waste
ZHANG Xing-xing1, JIAO Peng-bo1, YANG Hui-ying1, WU Rui-min1, LI Yong-mei2, MA Li-ping1
1. School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China; 2. School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Abstract：In order to promote the industrial-scale application of anaerobic co-digestion (AcoD) of sewage excess sludge (ES) with food waste (FW) and enhance its energy recovery efficiency, this study systematically summarized the mechanisms of AcoD process, the distribution of co-digestive products and the factors that may affect the AcoD performance, the important research advances of direct interspecific electron transfer in AcoD were then reviewed, followed by the novel perspectives of AcoD process were proposed, such as developing efficient and economic methods for feedstock pretreatment, characterizing substrates degradation, understanding metabolic regulation by omics technologies, mitigating the effect of potential inhibitors in the AcoD systems, and in-situ coupling with other wastes, to improve digestion performance and stability. This study may provide a guidance and reference for efficient energy recovery of urban organic solid wastes.
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