ZHANG Juan,NIU Yu-hai,ZHANG Zi-li,et al.Operational Efficiency of Short-flow Ultrafiltration Process Treating Water from South-to-North Water Diversion Project[J].China Water & Wastewater,2020,36(23 23):37-41.
Operational Efficiency of Short-flow Ultrafiltration Process Treating Water from South-to-North Water Diversion Project
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
23 23
Page:
37-41
Column:
Date of publication:
2020-12-01
- Keywords:
- water from South-to-North Water Diversion Project; UF membrane; short-flow process; water purification efficiency; chemical cleaning; transmembrane pressure (TMP)
- Abstract:
- Short-flow ultrafiltration (UF) purification process was used to treat water from South-to-North Water Diversion Project, and water purification efficiency and membrane fouling were analyzed. According to the results of effluent quality, no matter how turbidity in the raw water and influent of the membrane changed, effluent turbidity maintained consistently at about 0.1 NTU and its qualification rate was up to 100%, and CODMn concentration in the effluent was always less than 2.0 mg/L and its qualification rate was also 100%. The process had 100% removal efficiency of almost all pathogenic microorganisms (such as Escherichia coli) and stable performance, and the effluent quality could meet Standards for Drinking Water Quality (GB 5749-2006). Results of field operation showed that it would take a long time to restore the membrane flux and reduce the transmembrane pressure (TMP) if the membrane was badly polluted. Membrane fouling was relieved and the TMP was maintained in a very low range by adjusting the washing procedure. Therefore, “zero-membrane fouling” technologies with good performance and low energy consumption could be realized.
Last Update:
2020-12-01