期刊
BIORESOURCE TECHNOLOGY
卷 329, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.124896
关键词
Composting; Nitrogen pollution risks; Distinct materials; Nitrogen-related microbes; ?Inferred? key genes
资金
- National Natural Science Foundation of China [51978131, 51878132]
- National Key Research and Development Project [2019YFC1906403]
This study evaluated nitrogen pollution risks during composting with distinct materials and components, identifying specific risks and contributing factors in chicken manure, municipal solid waste, and straw waste. The findings provide a foundation for future research and mitigation strategies to address nitrogen pollution during composting.
The aim of this study was to evaluate nitrogen pollution risks from distinct materials composting with the discrepancy of component, including chicken manure, municipal solid and straw waste (CM, MSW, SW). Results showed total nitrogen maximum mean concentrations were observed in CM (39.57 g/kg). Pollution risks in CM were continuous, while MSW and SW mainly concentrated during heating phases. Microbial analysis confirmed that pollution risks from ammonification and nitrification were more prevalent in CM. The risks of pollution caused by nitrate reduction accompanied N2O were the most serious in MSW. The multifunctional nitrogenrelated microbes Pseudomonas and Bacillus were affected by microenvironments and contributed to different pollution risks. Furthermore, PICRUSt analysis identified the ?inferred? key genes (pmoC-amoC, nrfH, nifD etc.) related to nitrogen pollution risks. This study evaluated nitrogen pollution risks and proposed the future directions, providing theoretical basis and feasible optimization measures for the mitigation of nitrogen pollution during composting.
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