昆明第四水质净化厂MBR工艺降低运行成本的措施

Measures to Reduce Operation Cost of MBR Process in No.4 Kunming WWTP

昆明市第四水质净化厂MBR工艺已运行10年多,在考虑膜折旧成本条件下,一个膜使用周期内的总运行成本约0.68元/m^(3),且随着通量的衰减,用电成本和膜维护成本成为总运行成本增加的主要原因。对该水质净化厂工艺占地、出水水质、再生水利用、设备运行、不同类型的膜更换及使用情况进行了分析,可知节省的土地资源的利用、再生水的利用、膜成本的降低可大幅降低MBR工艺的整体投入成本;从运行管理角度来看,MBR工艺出水稳定、设备运行及膜维护等工作不太复杂,适应性较强。

The MBR process of Kunming No.4 wastewater treatment plant(WWTP)has been in operation for more than ten years.Considering the membrane depreciation cost,the total operation cost within membrane life cycle is about 0.68 yuan/m^(3).The electricity and membrane maintenance costs increase as flux decays mainly cause the increasement of total operation costs.The occupied area,effluent quality,reclaimed water utilization,equipment operation,as well as replacement and use of different types of membranes are analyzed.It concludes that the economical utilization of land resources and reclaimed water as well as the reduction of membrane cost can greatly reduce the overall investment cost of MBR.From the perspective of operation management,MBR process effluent stability,equipment operation and membrane maintenance are not too complicated and have strong adaptation.