YUZhong-qing,ZHAOLe-hu,ZHANGJun-jie,et al.Application of Ozonation Coupled UV/H2O2 Process in Upgrading and Expansion of a Wastewater Treatment Plant[J].China Water & Wastewater,2023,39(6):60-65.
臭氧氧化耦合UV/H2O2工艺用于污水厂提标扩容工程
- Title:
- Application of Ozonation Coupled UV/H2O2 Process in Upgrading and Expansion of a Wastewater Treatment Plant
- 关键词:
- 准Ⅳ类标准; 混凝沉淀; 反硝化深床滤池; 臭氧氧化耦合UV/H2O2工艺; 提标改造
- Keywords:
- quasi class Ⅳ standard; coagulation sedimentation; denitrification deep bed filter; ozonation coupled UV/H2O2; upgrading and reconstruction
- 摘要:
- 安徽某污水处理厂现状规模为6.0×104 m3/d，一、二期建设规模均为3.0×104 m3/d，二级生化工艺分别采用“厌氧池+Orbal氧化沟”和A2/O工艺，一期、二期生化出水汇合后进入“混合絮凝三沉池+V型滤池”深度处理流程，出水水质执行一级A排放标准。提标扩容工程需扩容3.0×104 m3/d，且出水水质执行地表水准Ⅳ类标准，其中COD、氨氮及总磷执行《地表水环境质量标准》（GB 3838—2002）Ⅳ类标准，其余指标执行一级A标准。扩容工程二级生化处理采用A2/O工艺，深度处理采用“混合絮凝三沉池+反硝化深床滤池+臭氧氧化耦合UV/H2O2”工艺，其中，一、二期的V型滤池出水也进入臭氧氧化耦合UV/H2O2工艺处理。鉴于该污水厂上游接入两个工业园区污水处理厂出水，因此针对难降解COD采用了臭氧氧化耦合UV/H2O2工艺，同时臭氧氧化兼具消毒作用，节省了投资和用地。实际运行结果表明，出水水质达到设计标准。
- Abstract:
- The current scale of a wastewater treatment plant in Anhui is 6.0×104 m3/d, and the construction scale of phase Ⅰ and phase Ⅱ projects are both 3.0×104 m3/d. The secondary biochemical processes are “anaerobic tank and Orbal oxidation ditch” and A2/O process, respectively. The effluent from biochemical treatment of phase Ⅰ and phase Ⅱ projects is merged into the advanced treatment process consisting of mixed flocculation tertiary sedimentation tank and V-type filter, and the effluent is required to meet the first level A discharge standard. The scale of the expansion project is expanded by 3.0×104 m3/d, and the effluent COD, ammonia nitrogen and total phosphorus are required to meet the class Ⅳ criteria specified in Environmental Quality Standards for Surface Water (GB 3838-2002), and other indicators shall meet the first level A discharge standard. The secondary biochemical treatment of the expansion project is A2/O process, and the advanced treatment consists of mixed flocculation tertiary sedimentation tank, denitrification deep bed filter and ozonation coupled UV/H2O2. The effluent from the V-type filters in phase Ⅰ and phase Ⅱ projects is also treated by the ozonation coupled UV/H2O2 process. As the wastewater treatment plant also receives the effluent from two industrial park wastewater treatment plants upstream, ozonation coupled UV/H2O2 process is thus adopted for treating the refractory compounds. In addition, ozonation also has the function of disinfection, which saves investment and footprint area. The actual operational results show that the effluent quality meets the design standard.
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