TIANHai-cheng,YANGXi-kai,JIAOWen-hai,et al.Application of AAOA-MBR Process in Jinan Dongkezhan Underground Wastewater Treatment Plant[J].China Water & Wastewater,2023,39(22):78-83.
AAOA+MBR工艺用于济南东客站地下污水处理厂
- Title:
- Application of AAOA-MBR Process in Jinan Dongkezhan Underground Wastewater Treatment Plant
- 摘要:
- 济南东客站污水处理厂设计规模10×104 m3/d，主体工艺为AAOA+MBR，出水BOD5、COD、NH3-N、TP等指标日均值优于《地表水环境质量标准》（GB 3838—2002）中Ⅳ类标准；剩余污泥经机械浓缩+高压隔膜压滤机工艺处理后含水率≤65%。通过采用高负荷的MBR工艺，同时将构筑物上下叠合、合壁共建于地下的方式，克服了用地紧张的限制并满足了高标准的景观环境要求，项目总用地面积仅为《山东省建设用地控制标准》（2019年版）中规定值的2/5，地下箱体占地面积指标仅为0.2 m2/（m3·d-1），低于国内其他地下污水处理厂。通过设置速闭闸门及事故泵房的方式应对超量污水进入箱体造成的淹没风险，并通过抬高地坪、设置排涝泵房的方式使地下箱体免于洪涝威胁。基坑施工中采用了上部适当放坡+下部桩锚支护方案，并在采用管井+集水明排降水的同时设置止水帷幕与回灌井，共同保障了基坑周边输水管线和高压线塔的安全运行。
- Abstract:
- The design scale of Jinan Dongkezhan wastewater treatment plant is 10×104 m3/d, and the key process is AAOA-MBR. The daily average values of BOD5, COD, NH3-N, TP and other indicators in the effluent is better than the class Ⅳ limits specified in Environmental Quality Standards for Surface Water (GB 3838-2002), and the water content of excess sludge is less than 65% after treatment by mechanical thickening and high pressure diaphragm filter press. The limitation of land use is overcome and the requirements of high standard landscape environment are achieved by adopting the high-load MBR process and overlapping the structure up and down and co-building the wall underground. The total footprint area of the project is only 2/5 of the value specified in Shandong Province Construction Land Control Standards (2019 edition), and the underground box covers an area index of only 0.2 m2/(m3·d-1), which is lower than other underground sewage treatment plants in China. The flood risk caused by excess sewage entering the box is prevented by setting the quick-closing gate and the emergency pumping house, and the underground box is free from the threat of flood by raising the floor and setting the drainage pump room. In the construction of the foundation pit, the scheme of proper slope in the upper part and pile anchor support in the lower part is adopted, open channel and well points are constructed for construction drainage while water curtain and recharge well are also set up, which jointly ensure the safe operation of the water transmission pipeline and high voltage tower around the foundation pit.
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