SUChuang-jian,CHENZhi-hua,PANZhen-dong,et al.Greenhouse Gas Emission Characteristics of AAO Process in Treating the Rural Domestic Sewage and Synergistic Path of Pollution and Carbon Reduction[J].China Water & Wastewater,2025,41(22):21-26.
AAO工艺处理农村污水的减污降碳协同增效路径
- Title:
- Greenhouse Gas Emission Characteristics of AAO Process in Treating the Rural Domestic Sewage and Synergistic Path of Pollution and Carbon Reduction
- 摘要:
- 针对农村生活污水治理碳排放特征不明晰以及减污降碳协同增效路径不明确的问题，以AAO处理工艺为例，分析不同处理规模下各类温室气体的变化规律，探讨影响温室气体排放的因素及关联度，提出农村生活污水治理碳减排路径。结果表明，AAO工艺处理农村生活污水产生的温室气体以N2O和CO2为主；N2O排放强度不仅与总氮去除率正相关，还与单位污水处理电耗具有极强的正相关性（P=0.82）；CO2排放强度除了直接受单位污水处理电耗影响，还与进水COD浓度具有极强的正相关性（P=0.95）；处理规模较小的AAO工艺不利于节能降耗和实现CO2减排。因此，应鼓励污水源头减量、末端资源化利用、生态处理技术应用、节能处理技术运用等实现农村生活污水减污降碳协同增效。
- Abstract:
- To address the unclear greenhouse gas emissions associated with rural domestic sewage treatment and explore pathways for synergistic pollution and carbon reduction, this study used the AAO treatment process as a case study, analyzed the variations in greenhouse gas emissions with treatment scale, examined the influencing factors and their correlation degrees, and proposed carbon reduction pathways for rural domestic sewage treatment. The results revealed that the AAO process primarily produced nitrous oxide (N2O) and carbon dioxide (CO2). N2O emission intensity was positively correlated with both total nitrogen removal rate (P=0.82) and unit power consumption (P=0.82), while CO2 emission intensity demonstrated direct dependence on power consumption and influent COD concentration (P=0.95). The analysis indicated that small-scale AAO processes are ineffective for energy conservation and CO2 reduction. Therefore, carbon reduction strategies should focus on promoting source reduction, resource utilization, application of ecological treatment technologies and energy-efficient processes to achieve synergistic effects between pollution control and carbon reduction.
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