QIANXiao-yong,HUJing,LIDan,et al.Calculation and Characteristics of Greenhouse Gas Emission from Urban Wastewater Treatment Plants in Shanghai[J].China Water & Wastewater,2022,38(21):39-44.
上海城镇污水处理厂温室气体排放核算及其特征
- Title:
- Calculation and Characteristics of Greenhouse Gas Emission from Urban Wastewater Treatment Plants in Shanghai
- Keywords:
- urban wastewater treatment; greenhouse gas; calculation method; emission characteristics; Shanghai City
- 摘要:
- 基于城镇排水统计数据，核算了上海全市及各座城镇污水处理厂的温室气体排放量和排放强度，并分析了城镇污水处理厂温室气体排放强度的影响因素。结果表明，上海城镇污水处理厂的温室气体年排放总量约为190×104 t（以CO2当量计，下同），处理单位污水的温室气体排放强度为0.75 kg/m3；采用氧化沟工艺的污水处理厂温室气体排放强度平均为0.71 kg/m3，显著低于采用其他处理工艺的污水处理厂（P<0.05）；温室气体排放强度与单位污水处理电耗呈极显著正相关（P<0.01）、与COD去除率呈显著正相关（P<0.05）。从上海市各座城镇污水处理厂的温室气体排放强度来看，对照国际先进水平仍有温室气体减排潜力。
- Abstract:
- Based on the statistical data of urban wastewater treatment, the greenhouse gas emission and its emission intensity of urban wastewater treatment plants in Shanghai were calculated, and the influencing factors of greenhouse gas emission intensity were analyzed. The annual total greenhouse gas emission of urban wastewater treatment plants in Shanghai was approximately 1.9 million tons (measured by CO2 equivalent, the same below), and the greenhouse gas emission intensity per unit wastewater treatment was 0.75 kg/m3. The greenhouse gas emission intensity of wastewater treatment plants using oxidation ditch process was 0.71 kg/m3 on average, which was significantly lower than that of other treatment processes (P<0.05). In addition, greenhouse gas emission intensity was significantly positively correlated with unit wastewater treatment power consumption (P<0.01), and positively correlated with COD removal rate (P<0.05). According to the greenhouse gas emission intensity of urban wastewater treatment plants in Shanghai, there is still potential to reduce greenhouse gas emission compared with the international advanced level.
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