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量化从下水道到废水处理过程中的甲流量

Yijun Yin¹, Xiang Qi¹, Lan Gao¹

¹School of Environment, Tsinghua University, Beijing 100084, P. R. China.

Environmental science & technology

|May 23, 2024

概括

污水处理厂 (WWTP) 排放大量的甲 (CH4). 这项研究揭示了下水道涌入对WWTP CH4排放产生重大影响,突出了气味控制系统作为监测和缓解的关键.

科学领域:

环境科学环境科学
环境工程环境工程
大气化学大气化学

背景情况:

污水处理厂是甲 (CH4) 排放的重要来源.
目前对WWTP产生的CH4排放的监测具有挑战性,因为WWTP产生的CH4排放具有挑战性.
黑盒子是一个黑盒子.
处理过程的性质.
从下水道获得的CH4流入对WWTP总体排放的贡献仍然不太清楚.

研究的目的:

为了量化中国的WWTP产生的CH4排放量.
调查下水道CH4流入对WWTP排放的影响.
评估气味控制系统在CH4监测和缓解方面的潜力.

主要方法:

从中国六个水电站的量化CH4排放量.
利用现有的多区气味控制系统进行监控.
在 Guiyang WWTP 进行 24 小时在线监控.
与水消耗和影响化学氧气需求 (COD) 相关的CH4波动.

主要成果:

在北京WWTP中,近90%的CH4排放来自下水道管道,影响有氧处理区.
贵阳水电厂在入口井释放了CH4,其中的波动与用水量和COD有关.
监测的CH4排放因子在1.5至13.4gCH4/kgCODrem之间,超过了之前的研究.
气味控制系统在CH4的追踪和监测方面被证明是有效的.

结论:

下水道的CH4流入是WWTP排放的一个关键因素,经常被低估.
气味控制系统为WWTP中的CH4管理提供了一种可行且具有成本效益的方法.
准确的CH4排放评估需要考虑下水道流入.

关键词:

在 A2O 技术上,A2O 技术排放因子的排放因子温室气体排放量排放量温室气体排放量排放量甲是一种甲.下水道系统的下水道系统.污水处理污水处理污水处理

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