摘要：

构建基于A²O与SBR串联工艺的改良型序批式一体化设备（MSBR），以实际生活污水为处理对象，考察了该设备在水量波动、间歇断流和水温变化条件下的运行特征与处理效能，并对其运行经济性进行对比分析。结果表明，在间歇和连续进水两种工况下，COD、NH₄ ⁺-N和TN去除率均达到90%以上，均满足《城镇污水处理厂污染物排放标准》（GB 18918—2002）一级A标准，TP满足一级B标准。当水力停留时间为10.4 h时，COD、NH₄ ⁺-N、TP和TN去除率达到82.4%、88.3%、97.1%和68.3%，此时COD和NH₄ ⁺-N满足GB 18918—2002一级A标准。夏季系统出水COD、NH₄ ⁺-N、TP和TN去除率分别为92.8%、95.7%、93.0%、77.8%，冬季系统出水COD、NH₄ ⁺-N、TP和TN去除率分别为89.8%、89.3%、91.6%、72.3%，COD、NH₄ ⁺-N和TN均满足GB 18918—2002一级A标准，TP满足一级B标准。与现有工艺对比分析表明，MSBR的COD和NH₄ ⁺-N去除负荷明显较高，总运行维护费用为0.67元/t，具有明显的经济优势，可为生活污水处理和生态环境治理提供新技术与新思路。

关键词: 分散式生活污水, 一体化设备, 脱氮除磷, 抗冲击负荷

Abstract:

A modified sequencing batch integrated plant(MSBR) with A²O and SBR tandem process was constructed to treat actual domestic wastewater, the operational characteristics and treatment efficacy of the plant were investigated under the conditions of water volume fluctuation, intermittent interruptions, and water temperature changes, and its operational economics were comparatively analyzed. The results showed that COD, NH₄ ⁺-N and TN removal rates under the two situations of intermittent and continuous water intake achieved more than 90%,all of which satisfied the standard of Class I-A, while TP met the standard of Class I-B. When the hydraulic retention time was decreased to 10.4 h, the removal rates of COD, NH₄ ⁺-N, TP, and TN reached 82.4%, 88.3%, 97.1%, and 68.3%, and the removal rates of COD and NH₄ ⁺-N subsequently met the standard of class A. The removal rates of COD, NH₄ ⁺-N, TP, and TN in the effluent were 92.8%, 95.7%, 93.0% and 77.8% in the summer and 89.8%, 89.3%, 91.6% and 72.3% in the winter, respectively. COD, NH₄ ⁺-N, and TN satisfied “Discharge standard of pollutants for municipal wastewater treatment plant”(GB 18918-2002) the class A standards, whereas TP met the class B standards. Comparative analysis with the existing process showed that MSBR had significantly higher COD and NH₄ ⁺-N removal loads, and the total operation and maintenance costs was 0.67 yuan/t. With obvious economic advantages, it could provide potential technological and conceptual innovations for domestic sewage treatment and ecological environmental management.

Key words: decentralized domestic sewage, integrated equipment, nitrogen and phosphorus removal, impact load resistance

中图分类号: 

• X703.1