在污水泥堆肥过程中模拟温室气体排放,使用高度氧气通风
Haiguang Qin1, Yixiao Chen2, Yanpeng Cai3
1Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, 510006, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin, 541004, China.
Environmental research
|March 27, 2025
概括
通过优化通风和矩阵孔隙性,可以减少堆肥产生的温室气体排放. 数字模拟显示,增加氧气度显著降低甲排放.
科学领域:
- 环境科学 环境科学
- 废物管理 废物管理
- 生物技术是生物技术.
背景情况:
- 持续的温室气体 (GHG) 排放,特别是甲 (CH4) 和氧化 (N2O),对堆肥的可持续性构成挑战.
- 堆肥矩阵的多孔性和空气化显著影响溶解氧 (DO) 分布和随后的温室气体排放.
研究的目的:
- 开发一种新的数值模拟方法,以优化堆肥中的氧气供应和矩阵孔隙性.
- 建立基于DO分布的温室气体排放的匹配方程.
主要方法:
- 开发了一种数字模拟方法,其中包括DO分布模型和温室气体适配方程.
- 参数是从试点实验中得出的,这些实验是对各种不同度的氧气 (20.9%和40.0%) 的污水泥堆肥.
主要成果:
- 将氧气度从20.9%提高到100.0%将CH4排放率降低了53%-96%,当空气不运动区域在0.2和0.5.5之间时.
- 在相同的条件下,N2O排放率呈现变化,下降7%或增加59%.
结论:
- 开发的数值模拟方法有效地模拟了堆肥中的温室气体排放.
- 这种方法可以帮助开发新技术,通过优化氧气供应和矩阵孔隙性来减少堆肥温室气体.
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