CHENTao,LIFeng,MAOWen-long,et al.Application Example of Tail Water from a Sewage Treatment Station by Constructed Wetland and Stabilization Pond System[J].China Water & Wastewater,2022,38(22):102-106.
人工湿地-稳定塘处理生活污水站尾水应用实例
- Title:
- Application Example of Tail Water from a Sewage Treatment Station by Constructed Wetland and Stabilization Pond System
- Keywords:
- domestic sewage; constructed wetland; horizontal subsurface flow wetland; cellulose carbon source; surface flow wetland; stabilization pond
- 摘要:
- 针对污水处理站执行的排放标准与地表水考核要求存在差距的问题，选择人工湿地-稳定塘系统对生活污水站处理尾水进行深度净化。以河南某乡镇污水处理站为例，结合尾水水质特性，设计了处理规模为2 000 m3/d的人工湿地（一级反硝化水平潜流湿地+二级水平潜流湿地+表面流湿地）-稳定塘系统，该系统稳定运行后，出水COD、NH3-N、TP指标优于《地表水环境质量标准》（GB 3838—2002）中Ⅳ类标准，TN降至4.78 mg/L以下；玉米芯为反硝化菌持续性提供有机碳源，显著提升了湿地的脱氮效果；湿地基质床内丰富稳定的生物群落，保障了湿地系统的运行效果。
- Abstract:
- In view of the gap between the discharge standards of sewage treatment stations and the assessment requirements of surface water, the constructed wetland and stabilization pond system was selected for advanced treatment of domestic sewage. Taking a sewage treatment station of a town in Henan Province as an example, aiming at the characteristics of tail water quality, a constructed wetland, which consists of primary denitrification horizontal subsurface flow wetland, secondary horizontal subsurface flow wetland and surface flow wetland, and stabilization pond system with a treatment capacity of 2 000 m3/d was designed. After the stable operation of the system, the effluent quality indexes of COD, NH3-N and TP were better than the level Ⅳ criteria in Environmental Quality Standards for Surface Water (GB 3838-2002), and the TN concentration was below 4.78 mg/L. Corn cob provided organic carbon source for denitrifying bacteria continuously, which significantly improved the nitrogen removal effect of wetland system. The abundant and stable biological community in wetland matrix bed ensured the operation effect of wetland system.
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