南郊水厂超滤膜组合工艺运行情况评价

分析并评价了东营市南郊水厂(10×104m3/d)以超滤为核心的水质改善工程一年来的运行情况.生产实践表明,超滤组合工艺出水水质较工程实施前有很大提升,超滤出水浊度保持在0.02 NTU以下,组合工艺对CODMn、UV254和TOC的平均去除率分别为(44.96±3.69)%、(43.22±2.21)%和(20.10±...

Evaluation of ultrafiltration membrane combination process in Nanjiao Waterworks

Application of UF as the key technology of water quality improving project in Nanjiao Waterworks with a water supply capacity of 10×104 m3/d was analyzed and evaluated for one year.The practical operation indicated that the effluent water quality was largely improved by UF combination process,and the effluent turbidity of UF was kept below 0.02 NTU.The average removal rates of CODMn,UV254 and TOC by UF combination process were（44.96±3.69）%,（43.22±2.21）% and（20.10±1.51）% respectively,which were improved 8.99,10.23 and 7.81 percent points comparing with sand filtration process.Meanwhile,the removal efficiencies of algae and pathogenic microorganism were prominent.The water quality could fully satisfy the requirement of the Standards for Drinking Water Quality（GB 5749-2006）.The conventional process as a pretreatment could retard the synergies of membrane,coagulation,sedimentation,sand filtration and dosing powdered activated carbon（PAC）.It could effectively ensure the stability of UF membrane operation in a sustainable flux.The domestic UF membrane had satisfied water production efficiency and anti-contamination ability.The water cleaning could control the increase of trans-membrane pressure（TMP）effectively,and extend the recoverable chemical cleaning period.The actual investment and operational cost of the UF combination process were lower than the estimated value.