相关实验视频

Updated: May 29, 2025

Biocontained Carcass Composting for Control of Infectious Disease Outbreak in Livestock

Biocontained Carcass Composting for Control of Infectious Disease Outbreak in Livestock

Published on: May 6, 2010

膜覆盖的有氧化堆肥通过改善微型有氧状态和增强碳源利用,减轻了氧化排放

Jinpeng Xiong¹, Huiwen Qu², Mary Harty³

¹Engineering Laboratory for AgroBiomass Recycling & Valorizing, College of Engineering, China Agricultural University, Beijing 100083 China; School of Environment, Tsinghua University, Beijing 100084 China; School of Agriculture and Food Science, University College Dublin, Dublin 4, Ireland.

Bioresource technology

|February 1, 2025

概括

覆盖膜的有氧堆肥 (MCAC) 产生微正压,增强有氧层,并减少20-27%的氧化 (N₂O) 排放. 这种方法优化了微生物活动的N₂O缓解.

科学领域:

环境科学环境科学
微生物学微生物学
废物管理废物管理

背景情况:

氧化 (N₂O) 是一种在有氧堆肥过程中排放的有力温室气体.
传统的有氧堆肥方法在控制N2O排放方面存在局限性.
覆盖膜的有氧化堆肥 (MCAC) 是一种具有排放控制潜力的新技术.

研究的目的:

描述MCAC与传统有氧堆肥中的N₂O排放变量和相互作用.
量化MCAC诱导的微正压对堆肥颗粒特性的影响.
阐明 MCAC 中 N₂O 减少的微生物和遗传机制.

主要方法:

在多个尺度 (粒子和堆) 上对N₂O排放进行比较分析.
测量有氧层厚度和微生物功能基因/微生物丰度.
使用MCAC和常规方法对各种碳来源的微生物代谢潜力的分析.

主要成果:

MCAC产生了微正压 (50-500 Pa),使有氧层厚度增加了24-27% .
MCAC显著降低了关键的N₂O相关的功能基因 (nirS,nirK,cnorB,nosZ) 和微生物.
MCAC增强了微生物对各种碳来源的利用,促进了N₂O的减少途径.

结论:

通过改善微空气状态,MCAC有效抑制N₂O生成途径.
在MCAC中增加微生物碳利用,有助于N₂O的减少途径.
MCAC提供了一种可行的策略,可以将堆肥产生的N₂O排放量减少20-27%.

关键词:

碳来源利用利用碳来源的利用.堆肥颗粒有氧层是堆肥颗粒的有氧层.脱基因是指脱基因的基因.脱的细菌可以使其脱.化细菌是一种化细菌.氧化的代谢氧化的代谢被半透膜覆盖的有氧化堆肥是半透膜覆盖的.

更多相关视频

Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures

Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures

Published on: January 7, 2019

Lab-Scale Model to Evaluate Odor and Gas Concentrations Emitted by Deep Bedded Pack Manure

Lab-Scale Model to Evaluate Odor and Gas Concentrations Emitted by Deep Bedded Pack Manure

Published on: July 19, 2018

相关概念视频

Overview of Nitrogen Metabolism

Overview of Nitrogen Metabolism

Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...

Bioremediation

Bioremediation

Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.

The Nitrogen Cycle

The Nitrogen Cycle

Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...