ZHOUJia-zhong,HANWen-jie,SONGPing-zhou,et al.BFM Process Design and Operation Analysis of an Intensive WWTP in North China[J].China Water & Wastewater,2023,39(18):126-132.
华北某集约型污水厂BFM工艺设计与运行分析
- Title:
- BFM Process Design and Operation Analysis of an Intensive WWTP in North China
- Keywords:
- suspended carrier; biofilm; magnetic loading precipitation; BFM; emergency treatment; rainy season overflow; prefabricated
- 摘要:
- 华北某新建处理规模为2×104 m3/d的污水处理设施，面临占地受限、进水水质复杂（含工业废水）、出水水质要求高（需达到地表水准Ⅴ类标准）、需在4个月内通水达标等难题。采用BFM为核心工艺，即纯膜MBBR工艺（B段）与改良磁加载沉淀工艺（M段），同时采用模块化设计，80 d完成了设计施工，20 d实现了通水达标。工艺流程为预处理+BFM+臭氧氧化+转盘滤池，B段总HRT仅为10 h，不设二沉池；M段设计表面负荷为11.57 m3/（m2·h）；除预处理采用土建形式，其余均采用模块方式，可以缩短建设周期。全厂出水COD、氨氮、TN、TP、SS分别为（21.86±3.26）、（0.44±0.24）、（10.19±1.37）、（0.09±0.03）、（4.77±0.89） mg/L，出水水质稳定达到地表水准Ⅴ类标准。当BFM出水COD>30 mg/L时开启臭氧氧化装置。智水优控信息控制平台的加载，提高了污水厂的综合运营管理水平，实现了26%的节能降耗。本项目经营成本为0.98元/m3。
- Abstract:
- The treatment capacity of a new WWTP in north China is 2×104 m3/d, which faced with many problems, such as limited land occupation, complex quality of influent containing industrial wastewater, high effluent quality to reach level quasi-V standard for surface water within four months. BFM was adopted as core process, which consists of pure moving bed biofilm reactor, MBBR in section B and improved magnetic coagulation precipitation process in section process M. At the same time, the modular design was adopted. The design and construction were completed in 80 days, and the water supply reached the standard in 20 days. The process flow is pretreatment, BFM, ozone oxidation, and rotary filter. The HRT of section B without secondary sedimentation tank is 10 h. The design surface load of section M is 11.57 m3/(m2·h). Except that the pre?processing adopts civil construction, the rest sections are modular, which shortens the construction period. The effluent of COD, NH4+-N, TN, TP and SS are (21.86±3.26), (0.44±0.24), (10.19±1.37), (0.09±0.03) and (4.77±0.89) mg/L respectively. The effluent quality could stably superior to the design effluent criteria of level quasi-V. When the COD of BFM effleunt exceeds 30 mg/L, the ozone oxidation device will be started. The loading of artificial intelligence system improves the comprehensive operation and management level of WWTP, and saves 26% of energy and consumption. The operating cost of this project is 0.98 yuan/m3.
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