Methane production from the co-digestion of pig manure and corn stover with the addition of cucumber residue: Role of the total solids content and feedstock-to-inoculum ratio. (June 2020)

• Record Type: Journal Article
• Authors: Wang, Yaya; Zhang, Jiaxing; Li, Yangyang; Jia, Shufei; Song, Yang; Sun, Yanbo; Zheng, Zehui; Yu, Jiadong; Cui, Zongjun; Han, Yiyu; Hao, Jianjun; Li, Guoxue
• Is Part Of: Bioresource technology. Volume 306(2020)
• Publication Date: 2020-06
• Subjects: Anaerobic co-digestion -- Total solid content -- Feedstock-to-inoculum ratio -- Net present value -- Internal rate of return; 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.2020.123172
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: The methane yield mainly decreased with increasing TS content and F/I ratio. The TS content of 10% was mostly affected by an increased F/I ratio. The Kh and Rmax decreased with increasing TS content and F/I ratio. A TS content of 30% had the highest net present value and internal rate of return. SS-AD were financially attractive especially at a lower F/I ratio. Abstract: This study investigated performance and stability of increasing total solids (TS) content (10–30%) and feedstock-to-inoculum (F/I) ratios (1, 2) on anaerobic co-digestion of agricultural wastes. The cumulative methane yields generally decreased with the increasing TS content except for the TS content of 30% at F/I ratio of 1 and TS content of 10% at F/I ratio of 2. This was consistent with the maximum methane production rate (Rmax ) and rate of the hydrolysis (Kh ) stage in reactors. The pH, VFAs and NH4 + -N content were positively correlated with increasing TS contents and F/I ratios. Economic analysis results indicated the net present value generally increased with increasing TS contents and TS content of 30% at F/I ratio of 1 had the highest net present value (5.7 million US$) and internal rate of return (41.9%). This indicated solid-state anaerobic digestion was financially attractive under analyzed conditions.