Improved nitrogen conservation capacity during composting of dairy manure amended with oil shale semi-coke as the porous bulking agent
| Autor: | Mingyi Lu, Yu-Zhong Zhao, Rong-Bo Guo, Xiaoshuang Shi, Hui Peng, Xu Li |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
Municipal solid waste Nitrogen Health Toxicology and Mutagenesis 0211 other engineering and technologies Firmicutes 02 engineering and technology 010501 environmental sciences engineering.material Retort Solid Waste 01 natural sciences law.invention law Environmental Chemistry Organic matter Polycyclic Aromatic Hydrocarbons Waste Management and Disposal Coke 0105 earth and related environmental sciences chemistry.chemical_classification 021110 strategic defence & security studies Compost Composting Biodegradation Pulp and paper industry Pollution Manure Nitrification Aerobiosis Actinobacteria Biodegradation Environmental chemistry engineering Environmental science Oil shale |
| Zdroj: | Journal of hazardous materials. 388 |
| ISSN: | 1873-3336 |
| Popis: | Oil shale semi-coke is the solid waste produced from the retorting process of oil shale, which may cause pollution to the environment without reasonable disposing. In this study, semi-coke was used as the bulking agent during composting to accelerate biodegradation of the organics as well as decrease the nitrogen loss. Results showed that the addition of semi-coke could accelerate biodegradation of the organics, with a raise in the organic matter loss from 44.99 % to 47.05 % compared with the control. Furthermore, the nitrogen loss significantly decreased from 40.00%-14.70 % in the treatment added with semi-coke due to less emission of NH3 and much more transformation of NH4+-N to NO3--N by nitrification, which could be explained by the increasing abundance of ammonia-oxidizing bacteria and archaea at the late composting stage and drastic shift of the microbial community like Chloroflexi, Firmicutes and Actinobacteria. After the composting cycle, the maturity of the produced compost was elevated greatly in the treatments amended with semi-coke. The result of PAHs detection suggested that there were low PAHs content in the raw oil shale semi-coke and they could be removed effectively to within the range for land application by composting especially when the surfactant was added. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect