Summary of operation experience of nanofiltration membrane treatment system in Zhangjiagang No.4 water treatment plant
The expansion project of Zhangjiagang No.4 drinking water treatment plant adopted a double membrane advanced treatment process of"coagulation-sedimentation-ultrafiltration-nano-filtration(NF)"using Yangtze River water as raw water.The total daily water production capacity was 211 000 m3,and the daily water production capacity of NF system was 100 000 m3.This paper collected long-term operational data of NF water plant,including SDI,residual chlorine,turbidity,pressure changes,main monitoring indicators of NF units(conductivity,COD and TDS),cleaning agents,water plant equipment,etc.,mainly summarized the operation experience and discussion of the NF system in the current operation mode,washing strategy,sterilization operation,water quality,consumptions of power and reagents.An analysis was conducted on the impact of tempera-ture on membrane treatment efficiency,control of membrane fouling,and conflicts in water plant cleaning pipelines,and proposed the related solutions in the operation process.Hope to provide ref-erence for industry related cases.
Zhangjiagang No.4 water trement plantNanofiltrationAdvanced treatmentRun-ning and maintenance
万方数据
维普
