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- Title
Contributions of Thermotolerant Bacteria to Organic Matter Degradation under a Hyperthermophilic Pretreatment Process during Chicken Manure Composting.
- Authors
Yun Cao; Lin Wang; Yuting Qian; Yueding Xu; Huashan Wu; Hongying Huang; Zhizhou Chang
- Abstract
Composting technology comprising hyperthermophilic pretreatment (at = 85 °C for 2 to 4 h, HTPRT) and aerobic composting was adopted to accelerate organic matter transformation and enhance nitrogen retention in chicken manure composting. The differences in physio-chemical parameters, successions, and metabolism functions of the bacterial community between HTPRT (85 °C, 4 h) and conventional composting (CK) were compared. The HTPRT composting system reached maturity 18 days in advance of CK. The HTPRT piles showed a lower maximum N loss (27.1% vs. 39.0%). The bacterial structure in the HTPRT system differed remarkably from that in CK. Ureibacillus (22.7%) and Ammoniibacillus (14.1%) were the most predominant species in the thermophilic phase of HTPRT pile, while the curing phase was dominated by Thermobifida (12.8%) and Saccharomonospora (11.8%). The authors' results suggest that HTPRT improved the physical properties of the feedstock by reducing the bulk density, which favored microbiological activity, and thus improving composting efficiency.
- Publication
BioResources, 2019, Vol 14, Issue 3, p6747
- ISSN
1930-2126
- Publication type
Article
- DOI
10.15376/biores.14.3.6747-6766