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在有机废物堆肥过程中,氧化的微生物来源和消化槽

Zhicheng Xu^1,2, Xingzu Gao¹, Guoxue Li²

¹Key Laboratory of Plant-Soil Interactions of Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.

Environmental science & technology

|April 22, 2024

概括

由于特定的细菌,堆肥会排放氧化 (N2O). 控制这些微生物,特别是那些缺乏nosZ的微生物,并促进消耗N2O的细菌可以减少排放.

科学领域:

环境微生物学环境微生物学
生物地质化学循环的过程
废物管理废物管理

背景情况:

堆肥是一种关键的有机废物管理策略.
氧化 (N2O) 是在堆肥过程中排放的重要温室气体.
了解微生物N2O的生产和消费对于减少排放至关重要.

研究的目的:

研究细菌在堆肥过程中N2O排放中的基因组和生理作用.
在整个堆肥过程中识别微生物N2O来源和沉积点.
为制定减轻N2O排放的战略提供见解.

主要方法:

用基因组解析的元基因组学来分析细菌群落.
分解了与N2O代谢相关的细菌基因组结构和生理功能.
N2O和氧化 (NO) 的动态与特定的微生物群体有关.

主要成果:

N2O排放最初是由缺乏nosZ的脱剂驱动的.
在热友阶段的高温抑制了大多数脱剂,除了含有nirK的.
缺乏nosZ的脱剂在冷却阶段增加了N2O的产量.
有机生物降解对产生N2O但不消耗N2O的细菌的脱剂具有有限的能量.
含有nosZ的细菌,特别是非化剂 (nosZII型),主导了N2O下水槽.

结论:

针对含有nirKS的脱剂和促进nosZ携带的细菌可以减轻堆肥N2O排放.
操纵微生物群落为在堆肥中有效减少N2O提供了一条途径.
了解N2O生产和消费之间的平衡是可持续堆肥的关键.

关键词:

细菌生理行为细菌生理行为堆肥堆肥是用来堆肥的基因组为中心的元基因组学.温室气体排放的温室气体排放量氧化是什么?氧化是什么?源泉和水槽的情况.

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