Anaerobic codigestion of pretreated wheat straw with cattle manure and analysis of the microbial community. (June 2015)

• Record Type: Journal Article
• Authors: Song, Zilin; Zhang, Chao
• Is Part Of: Bioresource technology. Volume 186(2015)
• Page Start: 128
• Page End: 135
• Publication Date: 2015-06
• Subjects: H2O2 pretreatment -- Wheat straw -- Cattle manure -- Codigestion -- Microbial community; 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.2015.03.028
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Wheat straw (WS) pretreated with H2 O2 was codigested with cattle manure (CM). Methanogenic community was measured by the high-throughput sequencing technique. The optimal concentration of H2 O2 for treating WS was 3%. A 40:60 ratio of H2 O2 -treated WS mixed with CM produced the highest methane yield. Methanogen shifted from acetoclastic to hydrogenotrophic population in digestion. Abstract: Wheat straw (WS) was pretreated with four concentrations of H2 O2 (1%, 2%, 3%, and 4%) and was anaerobically codigested with dairy cattle manure (CM) at various ratios from 100:0 to 0:100. Wet-state H2 O2 pretreatment effectively enhanced the biodegradability and methane yield of the WS. The optimal concentration of H2 O2 for treating WS was 3%. The methane yield was higher with the codigestion of CM and H2 O2 -treated WS than with untreated WS and higher than with H2 O2 -treated WS alone or CM alone. A 40:60 ratio of H2 O2 -treated WS mixed with CM produced the highest yield of methane (320.8 mL g volatile solid (VS) −1 ). Results of high-throughput sequencing indicated that the methanogenic community shifted during the codigestion from the acetoclastic methanogens, Methanosarcina, to the hydrogenotrophic methanogens, Methanosphaera and Methanoculleus .