纯膜MBBR与磁沉淀组合工艺处理村镇生活污水工程实例  

Example of Combined Process of Pure Membrane MBBR and Magnetic Sedimentation for Rural Domestic Wastewater Treatment Project

作　　者：彭展 谢依廷 张玥 黄世全 黎继红 PENG Zhan;XIE Yiting;ZHANG Yue;HUANG Shiquan;LI Jihong(CSCEC SCIMEE Sci.&Tech.Co.,Ltd.,Chengdu 610045,China)

机构地区：[1]中建环能科技股份有限公司,四川成都610045

出　　处：《净水技术》2025年第4期166-171,181,共7页Water Purification Technology

基　　金：四川省科技成果转移化示范项目(2023ZHCG0052-01)。

摘　　要：【目的】以湖北某村镇污水处理工程项目为例,对纯膜移动床生物膜反应器(MBBR)+磁混凝沉淀组合工艺处理村镇生活污水的设计参数、处理效果和效益进行分析,分析该组合工艺在村镇生活污水处理上的适用性。【方法】项目设计总处理规模为4000 m^(3)/d,在3个村镇生活污水收集点附近各建1座污水处理站对各个站点的村镇生活污水进行处理,根据进出水水质要求,设计采用预处理+纯膜MBBR+磁混凝沉淀处理工艺对该污水进行处理。【结果】该系统工艺对化学需氧量(COD_(Cr))、氨氮和总磷(TP)指标的平均去除率分别可达到85.71%、80.38%和90.82%,设计出水主要指标优于《地表水环境质量标准》(GB 3838—2002)的要求。该系统的生物工艺采用纯膜MBBR,MBBR池后端不设二沉池且无污泥回流装置,泥水分离和深度处理单元通过磁混凝沉淀池工艺完成。吨水直接运行成本较类似工艺经营成本更省。【结论】该组合工艺具有处理效果好、运行方便、流程简单、占地小、投资省和运营费用低等优点,不仅适用于进水低氨氮的提标改造等项目(一般进水氨氮≤8 mg/L),也适用于村镇污水等进水氨氮较高的情况,可为我国村镇生活污水及分散污水高标准处理与回用提供设计借鉴与案例参考。[Objective]Taking a wastewater treatment project in a village in Hubei as an example,the design parameters,treatment effects and benefits of the pure moving-bed biofilm reactor(MBBR)+magnetic coagulation sedimentation combined process for treating village domestic wastewater are analyzed,and analyzes the applicability of this combined process for treating village domestic wastewater.[Methods]The total design treatment scale of the project is 4000 m^(3)/d.A wastewater treatment station is been built near three village and town domestic wastewater collection points to treat the village and town domestic wasterwater at each site.According to the water quality requirements of the influent and effluent,the design adopted pretreatment+pure MBBR+magnetic coagulation sedimentation treatment process treated this wastewater.[Results]The average removal rate of chemical oxygen demand(CODCr),ammonia nitrogen and total phosphorus(TP)indices of system are reached 85.71%,80.38% and 90.82%,respectively.The main indices of designed water quality are better than the Environmental Quality Standards for surface water(GB 3838—2002).The biological process of this system uses pure MBBR.There is no secondary sedimentation tank at the back end of the MBBR tank and no sludge return device.The sludge-water separation and advanced treatment unit are completed through the magnetic coagulation sedimentation tank process.[Conclusion]This combined process has the advantages of good treatment effect,convenient operation,simple process,small footprint,low investment and low operating costs.It is not only suitable for projects such as the standard improvement and transformation of low influent ammonia nitrogen(generally,influent ammonia nitrogen is≤8 mg/L),it is also suitable for rural wastewater and other situations where incoming water ammonia nitrogen is high,and can provide design reference and case reference for high-standard treatment and reuse of domestic wastewater and dispersed wastewater in villages and towns in our country.

关 键 词：纯膜MBBR 磁混凝沉淀 村镇生活污水 工程应用 高排放标准 

分 类 号：TU992[建筑科学—市政工程]