Semi-continuous anaerobic digestion of extruded OFMSW: Process performance and energetics evaluation. (January 2018)

• Record Type: Journal Article
• Authors: Mu, Lan; Zhang, Lei; Zhu, Kongyun; Ma, Jiao; Li, Aimin
• Is Part Of: Bioresource technology. Volume 247(2018)
• Page Start: 103
• Page End: 115
• Publication Date: 2018-01
• Subjects: Extrusion pretreatment -- OFMSW -- Food waste -- Trace metal -- Anaerobic digestion; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2017.09.085
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: A typical extruded OFMSW was comprehensively characterized. The extruded OFMSW showed a high BMP and good long-term stability. A high net electricity output of 129.19–156.37 kWh/ton raw MSW was obtained. Co-digestion of the extruded OFMSW with food waste showed an increased energy output. Abstract: Recently, extrusion press treatment shows some promising advantages for effectively separating of organic fraction of municipal solid waste (OFMSW) from the mixed MSW, which is critical for their following high-efficiency treatment. In this study, an extruded OFMSW obtained from a demonstrated MSW treatment plant was characterized, and submitted to a series of semi-continuous anaerobic experiments to examine its biodegradability and process stability. The results indicated that the extruded OFMSW was a desirable substrate with a high biochemical methane potential (BMP), balanced nutrients and reliable stability. For increasing organic loading rates (OLRs), feeding higher volatile solid (VS) contents in feedstock was much better than shortening the hydraulic retention times (HRTs), while excessively high contents caused a low biodegradability due to the mass transfer limitation. For energetics evaluation, a high electricity output of 129.19–156.37 kWh/ton raw MSW was obtained, which was further improved by co-digestion with food waste.