Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, 210095, China; Key Laboratory of Crop and Livestock Integrated Farming, Ministry of Agriculture and Rural Affairs, Nanjing, 210014, China.
Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, 210095, China; Key Laboratory of Crop and Livestock Integrated Farming, Ministry of Agriculture and Rural Affairs, Nanjing, 210014, China; College of Resources and Environment, Nanjing Agricultural University, Nanjing, 210095, China.
J Environ Manage. 2022 Aug 15;316:115215. doi: 10.1016/j.jenvman.2022.115215. Epub 2022 May 7.
Hyperthermophilic pretreatment composting (HPC) has the advantages of enhanced composting efficiency and accelerated humic substance (HS) over conventional composting (CC). However, the mechanisms towards the accelerated humification process by HPC are still not clear. By means of sterilization technology, the roles of abiotic and biotic components on the formation of HS can be distinguished. The study investigated the humification degree and the succession of microbial community during HPC of pig manure. The mechanisms underlying the accelerated humification by HPC was identified using gamma sterilization. Results showed that HS content increased significantly by 13.72% in HPC and 29.93% in sterilized HPC inoculated with 1% CC (HPC_I), compared with 8.76% increase in CC and 7.12% increase in sterilized CC inoculated with 1% HPC during composting (CC_I). Compared with CC and CC_I, stronger intensities of HA-like and fulvic acid-like components were observed in HPC and HPC_I. Results showed that physicochemical properties, especially pH, were the key factors in accelerating the humification in HPC, while both physicochemical properties and microbial community contributed to the HA formation in CC. The study contributed to a better understanding of the mechanism towards the accelerated humification degree in HPC.
高温预处理堆肥（HPC）相较于传统堆肥（CC）具有提高堆肥效率和加速腐殖质（HS）形成的优点。然而，高温预处理堆肥加速腐殖化过程的机制仍不清楚。通过灭菌技术，可以区分非生物和生物成分在 HS 形成过程中的作用。本研究通过高温预处理猪粪堆肥，探讨了堆肥过程中腐殖化程度和微生物群落的演替。利用γ射线灭菌技术，确定了高温预处理加速腐殖化的机制。结果表明，与 CC 和 1%高温预处理接种 1% CC（HPC_I）相比，HS 含量分别显著增加了 13.72%和 29.93%，而 CC 和 1% CC 接种 1%高温预处理（CC_I）分别增加了 8.76%和 7.12%。与 CC 和 CC_I 相比，HPC 和 HPC_I 中 HA 样和富里酸样组分的强度更强。结果表明，理化性质，特别是 pH 值，是加速 HPC 腐殖化的关键因素，而理化性质和微生物群落都有助于 CC 中 HA 的形成。本研究有助于更好地理解高温预处理加速腐殖化程度的机制。
