Zhang Shuqun, Fu Tao, Tang Jiahuan, Liu Dandan, Zheng Xincheng, Shangguan Huayuan, Lin Hao, Yu Zhen, Zeng Raymond Jianxiong
Fujian Provincial Key Laboratory of Eco-Industrial Green Technology, College of Ecology and Resources Engineering, Wuyi University, Wuyishan, 354300, China; Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China.
J Environ Manage. 2025 Jan;373:123611. doi: 10.1016/j.jenvman.2024.123611. Epub 2024 Dec 5.
Hyperthermophilic composting (HTC) with excellent disposal effect is a novel composting technology by inoculating exogenous thermophilic microorganisms. However, the role of exogenous thermophilic microorganisms in HTC remains debated, especially for the applicability of different compost feedstocks. In this study, the role of Parageobacillus toebii during HTC using chicken and pig manure was investigated. The addition of P. toebii could raise the maximum temperature to 78.2 °C and obviously enhanced maturation effect in chicken manure composting. However, the enhancement effect of P. toebii was weaker in pig manure compost, and the maximum temperature only reached 73 °C. Addition of P. toebii could stimulated functional microbial communities for C&N transformation, increased temperature, and promoted the growth of thermophilic microorganisms in chicken manure composting. Component analyses showed that chicken manure had higher bioavailability compared to pig manure. Correlation analysis indicated that P. toebii activated as a "leader", stimulating metabolic activity among functional microbial communities and enhancing organic matter degradation for heat release, while its activation depended on the bioavailability of the raw material. This study provides important insights into the role and application of exogenous microorganisms in promoting HTC.
超高温堆肥（HTC）处置效果优异，是一种通过接种外源嗜热微生物的新型堆肥技术。然而，外源嗜热微生物在HTC中的作用仍存在争议，尤其是对于不同堆肥原料的适用性。本研究调查了嗜热栖热芽孢杆菌（Parageobacillus toebii）在以鸡粪和猪粪为原料的HTC过程中的作用。添加嗜热栖热芽孢杆菌可使鸡粪堆肥的最高温度升至78.2℃，并显著增强腐熟效果。然而，嗜热栖热芽孢杆菌在猪粪堆肥中的增强作用较弱，最高温度仅达73℃。添加嗜热栖热芽孢杆菌可刺激鸡粪堆肥中参与碳氮转化的功能微生物群落，提高温度，并促进嗜热微生物生长。成分分析表明，鸡粪的生物有效性高于猪粪。相关性分析表明，嗜热栖热芽孢杆菌作为“主导者”被激活，刺激功能微生物群落间的代谢活性，增强有机物降解以释放热量，而其激活取决于原料的生物有效性。本研究为外源微生物在促进HTC中的作用及应用提供了重要见解。
