School of Environment, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, China.
Environ Sci Pollut Res Int. 2019 Mar;26(9):8928-8938. doi: 10.1007/s11356-019-04404-x. Epub 2019 Feb 4.
Reducing the emissions of NH and greenhouse gases (GHGs) during composting is essential for improving compost quality and controlling environmental pollution. This paper investigates the effects of pelelith (P) combined with dicyandiamide (DCD) on gaseous emissions and the fungal community diversity during sewage sludge (SS) composting. Results showed that the P and P + DCD treatments decreased the cumulative gaseous emissions by 41% and 22% for NH, 21% and 34% for NO, and 31.5% and 33.0% for CH, respectively. The evolution of the fungal community analysis showed that Ascomycota and unclassified fungi dominated during the thermophilic stage, while only Ascomycota was the dominant fungal phylum during the maturity stage, composing 62%, 66%, and 73% of the total fungal community in the control, P, and P + DCD, respectively. The P and P + DCD significantly increased the fungal community richness at the genus level. Fungal community abundance was found to be significantly related to temperature, pH, organic matter, and total Kjeldahl nitrogen, which also influence the gaseous emissions during SS composting. It suggested that the combined addition of pelelith and dicyandiamide (DCD) was an effective method for reducing the emissions of NH and greenhouse gases during SS composting.
减少堆肥过程中 NH 和温室气体（GHG）的排放对于提高堆肥质量和控制环境污染至关重要。本文研究了沸石（P）与双氰胺（DCD）联合添加对污水污泥（SS）堆肥过程中气态排放和真菌群落多样性的影响。结果表明，P 和 P+DCD 处理分别使 NH 的累积排放量减少了 41%和 22%，NO 减少了 21%和 34%，CH 减少了 31.5%和 33.0%。真菌群落分析的演变表明，在高温阶段，子囊菌门和未分类真菌占主导地位，而在成熟阶段，只有子囊菌门是主要的真菌门，分别占对照、P 和 P+DCD 中总真菌群落的 62%、66%和 73%。P 和 P+DCD 显著增加了属水平的真菌群落丰富度。发现真菌群落丰度与温度、pH 值、有机质和总凯氏氮显著相关，这些因素也影响 SS 堆肥过程中的气态排放。这表明沸石和双氰胺（DCD）的联合添加是减少 SS 堆肥过程中 NH 和温室气体排放的有效方法。
