WUBo,YEChang-ming,WANGXiao-lin,et al.Application of Upflow DDBF in Upgrading and Reconstruction of a WWTP[J].China Water & Wastewater,2022,38(4):103-108.
上向流反硝化深床滤池用于污水厂提标改造
- Title:
- Application of Upflow DDBF in Upgrading and Reconstruction of a WWTP
- Keywords:
- wastewater treatment plant; upgrading and reconstruction; modular water treatment equipment; denitrification deep bed filter(DDBF)
- 摘要:
- 广东省某水质净化厂一期工程原采用SBR+纤维转盘滤池为主体的工艺，提标改造后要求主要出水指标达到《地表水环境质量标准》（GB 3838—2002）的Ⅴ类标准（TN≤15 mg/L），实际出水TP偶尔超标，TN严重超标。提标改造工程在现有SBR工艺后端新增上向流反硝化深床滤池模块化水处理装备，出水COD≤30 mg/L、BOD5≤6 mg/L、TN≤12 mg/L、TP≤0.3 mg/L、SS≤5 mg/L，达到了地表水准Ⅳ类标准，表明上向流反硝化深床滤池脱氮除磷效果好，尤其是脱氮效率较高，最大TN去除量高达29.4 mg/L，相应的反硝化负荷达到2.08 kgNO3--N/（m3·d）。
- Abstract:
- The first phase of a wastewater treatment plant (WWTP) originally adopted SBR and fiber rotary disc filter as the main process. The actual effluent TP occasionally exceeded the standard and TN seriously exceeded the standard. After upgrading reconstruction, it was required that the main effluent quality indexes could reach level V of Environmental Quality Standards for Surface Water (GB 3838-2002) (TN≤15 mg/L). In the upgrading reconstruction project, the modular water treatment equipment of upflow denitrification deep bed filter (DDBF) is added at the back end of the existing SBR process. The effluent COD, BOD5, TN, TP and SS are no more than 30 mg/L, 6 mg/L, 12 mg/L, 0.3 mg/L, and 5 mg/L, respectively, which reached level quasi-Ⅳ of Environmental Quality Standards for Surface Water. The results showed that the upflow DDBF had good nitrogen and phosphorus removal effect, especially for nitrogen that the maximum TN removal amount was as high as 29.4 mg/L, and the corresponding denitrification load reached 2.08 kgNO3--N/(m3·d).
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