Journal
BIORESOURCE TECHNOLOGY
Volume 330, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.124950
Keywords
Start-up of low-temperature compost; Organic compounds; Key bacteria; Enzyme activity; Chicken manure
Funding
- National Natural Science Foundation of China [51778116, 51878132, 51378097]
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The research showed that key bacteria and enzyme activities play a crucial role in the degradation of organic compounds in low-temperature composting environment, which can significantly promote the degradation process of organic compounds in chicken manure.
During composting of chicken manure, the degradation of organic compounds is a key factor affecting the fate of chicken manure in the low temperature environment. Here, we studied the changes of main organic compounds, including carbohydrates, proteins and lipids and the role of key bacteria in composted at 10 ?C. The degradation rates of total sugar and protein in inoculation group were 41.11% and 47.63% respectively, which were related to the activities of carbohydrate related enzymes. The key bacteria from composting have better degradation of organic compounds capacities than others, and improve the enzyme activity. Cluster heatmap verified that the microbial community and enzyme activity were the primary driving factors of organic compounds degradation. Thus, the co-regulation of key microbial and enzyme activity made it possible to promote degradation of organic compounds drastically by microbial metabolism. These above findings are beneficial to improving the utilization of livestock manure in cold areas.
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