Biogas Potential of Food Waste-Recycling Wastewater after Oil–Water Separation

Gyuseong Han, Juhee Shin, Myoung-Eun Lee and Seung Gu Shin ()
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Gyuseong Han: Eco-Technology Research Team, Technology Research Center, Hyundai Engineering & Construction, 75 Yulgok-ro, Jongno-gu, Seoul 03058, Republic of Korea
Juhee Shin: Future Convergence Technology Research Institute, Gyeongsang National University, 501 Jinjudae-ro, Jinju 52828, Republic of Korea
Myoung-Eun Lee: Future Convergence Technology Research Institute, Gyeongsang National University, 501 Jinjudae-ro, Jinju 52828, Republic of Korea
Seung Gu Shin: Future Convergence Technology Research Institute, Gyeongsang National University, 501 Jinjudae-ro, Jinju 52828, Republic of Korea

Energies, 2024, vol. 17, issue 17, 1-10

Abstract: This study explores the potential of food waste-recycling wastewater (FRW) for biogas production, emphasizing oil–water separation before anaerobic digestion. Three FRW samples were analyzed: non-treated (FRW), water–oil separated (FRW_sep), and mixed with domestic sewage (FRW_mix). Physicochemical characterization showed a 26% reduction in crude lipid content after oil–water separation. The biochemical methane potential (BMP) tests revealed similar methane yields for FRW_sep and FRW_mix compared to non-treated FRW. Microbial analysis identified Firmicutes and Methanoculleus as active populations. Energy balance suggests that combining biodiesel and biogas production can enhance net energy recovery. This research indicates that oil–water separation in FRW treatment can optimize anaerobic digestion, contributing to sustainable waste management and renewable energy generation.

Keywords: anaerobic digestion; food waste leachate; municipal sewage; next-generation sequencing; microbial community (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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