A review of the upgrading technology for the A2/O process of municipal wastewater treatment plants under high discharge standards in China
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摘要: 以“十一五”和“十二五”期间的A2/O升级改造技术成果为基础, 结合当前运行良好且具有代表性的改良A2/O工艺, 从原位优化改造和深度处理等方面总结了高排放标准下城镇污水厂A2/O工艺升级改造的技术对策. 介绍了具有代表性的A2/O升级改造示范工程的运行情况, 并对A2/O工艺的优化和推广使用提供建议.Abstract: This paper provides an overview of the technical achievements in A2/O upgrading during the 11th and 12th Five-Year Plans as well as the current successful operation of the improved A2/O process. We summarize the measures used for upgrading the A2/O process of municipal wastewater treatment plants under high discharge standards with respect to in-situ optimization and advanced treatment. Finally, we review the operating state of representative A2/O upgrade demonstration projects and offer suggestions for optimization and promotion of the A2/O process.
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表 1 全国重点流域污水厂污染物排放标准(以太湖流域、巢湖流域、滇池流域为例)
Tab. 1 Discharge standards for municipal wastewater treatment plants in key basins (Taihu Basin, Chaohu Basin, and Dianchi Basin)
标准号 适用范围 类别 COD 氨氮 总氮 总磷 GB18918—2002 [13] 全国范围 一级A 50 5(8) 15 0.5 DB 32/1072—2018[14] 江苏省太湖流域 一、二级保护区 40 3(5) 10(12) 0.3 其他区域 50 4(6) 12(15) 0.5 DB 33/2169—2018[15] 浙江省太湖流域 新建城镇污水厂 30 1.5(3) 10(12) 0.3 现有城镇污水厂 40 2(4) 12(15) 0.3 DB 34/2710—2016[16] 安徽省巢湖流域 现有城镇污水厂 Ⅰ类别 50 5(8) 15 0.5 Ⅱ类别 100 5(8) – 0.5 新建城镇污水厂 Ⅰ类别 40 2(3) 10(12) 0.3 Ⅱ类别 50 5 15 0.5 DB 5301/T 43—2020 [17] 昆明市 A级 20 1(1.5) 5(10) 0.05 B级 30 1.5(3) 10(15) 0.3 C级 40 3(5) 15 0.4 D级 40 5(8) 15 0.5 E级 70 – – 2 注: Ⅰ类别为接纳污水中工业废水量 < 50%的城镇污水厂; Ⅱ类别为接纳污水中废水量 ≥ 50%的城镇污水厂; 括号外数值为水温>12℃时的控制指标, 括号内数值为水温 ≤ 12℃时的控制指标. 表中数据单位为 mg/L. -
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