PubAg

Main content area

Bacterial community succession during pig manure and wheat straw aerobic composting covered with a semi-permeable membrane under slight positive pressure

Author:
Ma, Shuangshuang, Fang, Chen, Sun, Xiaoxi, Han, Lujia, He, Xueqin, Huang, Guangqun
Source:
Bioresource technology 2018 v.259 pp. 221-227
ISSN:
0960-8524
Subject:
Cellvibrionales, Clostridiales, Pseudomonas, anaerobes, bacteria, bacterial communities, composting, discriminant analysis, emissions, fermentation, genes, organic fertilizers, organic matter, pig manure, principal component analysis, ribosomal RNA, wheat straw
Abstract:
Bacteria play an important role in organic matter degradation and maturity during aerobic composting. This study analyzed composting with or without a membrane cover in laboratory-scale aerobic composting reactor systems. 16S rRNA gene analysis was used to study the bacterial community succession during composting. The richness of the bacterial community decreased and the diversity increased after covering with a semi-permeable membrane and applying a slight positive pressure. Principal components analysis based on operational taxonomic units could distinguish the main composting phases. Linear Discriminant Analysis Effect Size analysis indicated that covering with a semi-permeable membrane reduced the relative abundance of anaerobic Clostridiales and pathogenic Pseudomonas and increased the abundance of Cellvibrionales. In membrane-covered aerobic composting systems, the relative abundance of some bacteria could be affected, especially anaerobic bacteria. Covering could effectively promote fermentation, reduce emissions and ensure organic fertilizer quality.
Agid:
6344030