北方某再生水厂MBR工艺设计

MBR因其显著的优势成为市政污水深度处理领域最有效的技术之一，但高昂的运行成本限制了MBR的推广应用。以北方某再生水厂大型MBR污水处理工程为例，探究所采用的新型膜装置以及合理的工艺设计对膜污染及运行能耗的控制效果。实际运行数据分析得出以下结论:1）进水污染物浓度虽然有较大波动，但其出水水质稳定，各项指标优于排放标准（DB 11/890—2012《城镇污水处理厂水污染物排放标准》）中B标准的要求。2）MBR系统采用PVDF材质，TIPS工艺制造的膜产品，膜丝强度大，组器填充密度高达895 m2/m3。3）MBR工艺采用先进的预处理系统和高强度脉冲曝气系统有效缓解膜污染，节省曝气量约25%。

MBR PROCESS DESIGN IN A RECLAIMED WATER PLANT IN NORTH CHINA

MBR had become one of the most effective technologies in the field of municipal wastewater advanced treatment due to its obvious advantages, but its high operating cost limited its promotion and application. Taking a large MBR sewage treatment project of a reclaimed water plant in North China for example, membrane pollution and operation energy consumption were explored by adopting new membrane device and reasonable process design. The following conclusions were drawn by analyzing the actual operation data as follows:1) although the concentration of the influent pollutants fluctuated greatly, the effluent quality was stable and water quality indices were superior than the class B requirements specified in Water Pollutants for Municipal Wastewater Treatment Plants(DB 11/890-2012); 2) the membrane products in applied in the MBR system was PVDF material and prepared by TIPS method. The membrane featured high strength and high filling density, reaching 895 m2/m3; 3) advanced pre-treatment system and high intensity pulse aeration system were adopted in the MBR to effectively reduce the membrane fouling, and then the aeration cost was reduced by about 25%.