Department of Environment, College of Architecture and Environment, Sichuan University, Chengdu 610065, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
Department of Environment, College of Architecture and Environment, Sichuan University, Chengdu 610065, China.
Bioresour Technol. 2022 Apr;349:126830. doi: 10.1016/j.biortech.2022.126830. Epub 2022 Feb 8.
This study investigated the impact of mature compost addition on food waste composting physicochemical properties, bacterial community succession and corresponding metabolic function. Analytical results from two pilot-scale composting treatments with (C20) or without (C0) mature compost demonstrated that mature compost amendment increased the reduction rate of volatile solids by 71.4% and shortened the composting period by 7 days. Microbial dynamics analysis revealed that mature compost addition increased the bacteria abundance related to maturity during the initial stage, and these bacteria (mainly SBR1031 and Actinomarinales) were easier to grow again during cooling stage, thus promoted the maturity of compost. Mature compost addition increased the abundance of Ureibacillus, Lysinibacillus, Limochordaceae and Tepidimicrobium by providing an appropriate temperature environment, which enhanced the amino acid and carbohydrate metabolism function and promoted the degradation of organic matter. Together, these findings revealed the underlying mechanisms of bacterial community succession with mature compost addition.
本研究探讨了成熟堆肥添加对厨余垃圾堆肥理化性质、细菌群落演替及其相应代谢功能的影响。通过两个中试规模的堆肥处理（C20 和 C0）的分析结果表明，成熟堆肥的添加将挥发性固体的减少率提高了 71.4%，并将堆肥周期缩短了 7 天。微生物动态分析表明，成熟堆肥的添加增加了初始阶段与成熟度相关的细菌丰度，这些细菌（主要是 SBR1031 和放线菌目）在冷却阶段更容易再次生长，从而促进了堆肥的成熟。成熟堆肥的添加增加了 Ureibacillus、Lysinibacillus、Limochordaceae 和 Tepidimicrobium 的丰度，为其提供了合适的温度环境，从而增强了氨基酸和碳水化合物代谢功能，并促进了有机物的降解。总的来说，这些发现揭示了成熟堆肥添加促进细菌群落演替的潜在机制。
