水厂浸没式超滤膜系统运行参数优化  

Optimization of Operation Parameters of Immersed UF Membrane System in WTPs

作　　者：申锋 陶静 岑松岭 曹林春 SHEN Feng;TAO Jing;CEN Songling;CAO Linchun(Nantong Water Group Co.,Ltd.,Nantong 226000,China)

机构地区：[1]南通水务集团有限公司,江苏南通226000

出　　处：《净水技术》2025年第2期79-85,共7页Water Purification Technology

摘　　要：【目的】超滤膜技术在水厂升级改造中已经得到广泛应用,其出水水质好,生物安全性高,但也存在运行和维护成本较高的问题亟待解决。【方法】目前,在浸没式超滤膜运行实践方面,可参考实际项目案例经验较少,狼山水厂浸没式超滤膜设计规模为30万m^(3)/d,采用与前置上向流臭氧活性炭工艺组合使用的方法。【结果】出水水质安全稳定,浑浊度<0.1NTU,颗粒数<10 CNT/m L。【结论】在运行管理中,对膜池选择不同运行参数优化分析发现,若采用水温20℃以下维持原过滤周期,而20℃以上延长过滤周期为4 h的优化方案,可在原有基础上减少约12%的水耗以及约12%的电耗;延长维护性清洗浸泡时间,每年进行1次恢复性清洗,可保障膜系统运行的稳定性;对恢复性清洗药剂重复利用[以2023年6月恢复洗为例,盐酸质量浓度为5000 mg/L,回用7次(回用中补充一部分酸),在原有基础上,节省了约48%的药剂量],可节约运行费用,对于膜法水厂的降本增效具有一定的参考借鉴意义。[Objective]Ultrafiltration membrane technology has been widely applied in the upgrading and reconstruction of water treatment plants(WTPs),with good finished water quality and high biological safety.However,there are also high operating and maintenance costs that need to be addressed urgently.[Methods]At present,in terms of the operation practice of immersion ultrafiltration membrane,there was less experience in actual project cases.The design scale of the immersion ultrafiltration membrane in Langshan WTP was 300000 m^(3)/d,combined with the upstream ozone activated carbon process.[Results]The effluent quality was safe and stable,with a turbidity of less than 0.1 NTU and a particle count of less than 10 CNT/mL.[Conclusions]In operation management,it is found that using an optimization scheme that maintains the original filtration cycle below 20℃and prolongs the filtration cycle for 4 hours above 20℃can reduce water consumption by about 12%and electricity consumption by about 12%on the original basis through optimization analysis of different operating parameters for membrane tanks.Extending the soaking time for maintenance cleaning and conducting a restorative cleaning once a year can ensure the stability of the membrane system operation.Taking the example of resuming washing in June 2023,5000 mg/L hydrochloric acid is reused 7 times(adding some acid during reuse)which saves about 48%of the dosage on the original basis.This indicates that reusing the restorative cleaning agent can save operating consumption.It has certain reference significance for the cost reduction and efficiency increase of membrane WTP.

关 键 词：浸没式超滤膜 水厂 参数优化 稳定性 优化 

分 类 号：TU991[建筑科学—市政工程]