Multi-omics reveal the structure and function of microbial community in co-digestion of corn straw and pig manure. (1st November 2021)

• Record Type: Journal Article
• Authors: Wang, Min; Liu, Yang; Jiang, Xinru; Fang, Junnan; Lyu, Qingyang; Wang, Xinhui; Yan, Zhiying
• Is Part Of: Journal of cleaner production. Volume 322(2021)
• Publication Date: 2021-11-01
• Subjects: Co-digestion -- Digester feeding -- Metagenomics analysis -- Taxonomic pattern -- Functional pattern; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2021.129150
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Metagenomic sequencing, basing on whole genomic analysis, was carried out to explain the taxonomic and functional patterns of microbial communities in co-digestion and mono-digestions with corn straw and pig manure. Bacteroides graminisolvens and Clostridium stercorarium, the dominant species for corn straw degradation, and Proteiniphilum acetatigenes, emphasizing on protein decomposition, performed the optimum abundance during the co-digestion to improve efficiency of substrate decomposition. Methanosaeta concilii was the richest species during the process of bio-methane production, whose quantity and status in co-digestion were better than in mono-digestion. Analysis of functional patterns indicated that the carbohydrate-active enzymes in co-digestion were sustained abundant resulting short lag time, and the abundance of enzymes involving in methanogenesis were extremely high in co-digestion indicating the active methane metabolism. An adequate understanding of taxonomic and functional patterns further revealed the mechanism of rapid startup and superb methane production in co-digestion. Highlights: Metagenome was sequenced to analyze taxonomic and functional patterns. Clostridium stercorarium was the specific species for corn straw degradation. Analysis of functional patterns further revealed the high efficiency of co-digestion. Co-digestion of corn straw and pig manure contributed to sustained high efficiency.