State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
Environ Pollut. 2024 Nov 1;360:124655. doi: 10.1016/j.envpol.2024.124655. Epub 2024 Aug 2.
With the proposal of dual carbon goals and stringent effluent standards, the path of mitigating greenhouse gas (GHG) emissions from wastewater treatment plants (WWTPs) has gained significant research attention. Here, we evaluate the impact of season, elevated standards, operating parameters, and using clean energy on GHG emissions from 8 typical WWTPs in Beijing based on 180 monthly monitoring data. Coupled with the increasing demand for wastewater treatment and 77% more chemical oxygen demand being removed in 2017, total GHG emissions from 5 WWTPs increased by 89% compared to the status quo in 2007, and after energy structure reform total GHG emissions decreased by 17% in 2021. Scenario analysis reveals that energy recovery and clean energy utilization provide 64% and 48% mitigation potential by 2050, respectively. We argue stricter effluent standard leads to GHG emissions growth in WWTPs; meanwhile, process optimization, proper temperature and targeted policies at WWTPs can reduce GHG emissions.
随着双碳目标的提出和污水排放标准的提高，减轻污水处理厂温室气体（GHG）排放的路径引起了广泛关注。本研究基于 180 个月的监测数据，评估了季节变化、排放标准提高、运行参数和清洁能源利用对北京 8 座典型污水处理厂 GHG 排放的影响。由于污水处理需求的增加，以及 2017 年化学需氧量去除量增加了 77%，与 2007 年现状相比，5 座污水处理厂的总 GHG 排放量增加了 89%，而在 2021 年进行能源结构改革后，总 GHG 排放量减少了 17%。情景分析表明，到 2050 年，能源回收和清洁能源利用分别具有 64%和 48%的减排潜力。我们认为，更严格的污水排放标准会导致污水处理厂 GHG 排放增加；同时，在污水处理厂采取工艺优化、适当的温度控制和有针对性的政策，可以减少 GHG 排放。
