AI Article Synopsis
- The study investigates the effects of adding phosphorus slag (PS) to sewage sludge (SS) composting, aiming to understand its impact on greenhouse gas emissions and the process of humification.
- The introduction of PS not only increased temperatures during composting but also led to significant reductions in nitrogen oxide (NO) emissions, by as much as 88.6% with higher concentrations of PS.
- Additionally, the use of PS improved microbial diversity and waste aeration, enhancing beneficial bacteria while reducing harmful species, showcasing PS as a viable and efficient waste treatment option.
Article Abstract
During the composting of sewage sludge (SS), a quantity of greenhouse gases has been produced. This study aimed to clarify the microbial mechanisms associated with the addition of industrial solid waste phosphorus slag (PS) to SS composting, specifically focusing on its impact on greenhouse gas emissions and the humification. The findings indicated that the introduction of PS increased the temperature and extended the high-temperature phase. Moreover, the incorporation of 10% and 15% PS resulted in a decrease of NO emissions by 68.9% and 88.6%, respectively. Microbial diversity analysis indicated that PS improved waste porosity, ensuring the aerobic habitat. Therefore, the environmental factors of the system were altered, leading to the enrichment of various functional bacterial species, such as Firmicutes and Chloroflexi, and a reduction of pathogenic bacterium Dokdonella. Consequently, incorporating PS into SS composting represents an effective waste treatment strategy, exhibiting economic feasibility and promising application potential.
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| http://dx.doi.org/10.1016/j.jenvman.2024.122740 | DOI Listing |
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