The operating parameters of ultrafiltration process for the treatment of Zhongyun River were carried out.Through the pilot study,four operating parameters,namely,filtration cy-cle,membrane flux,chemically enhanced backwash(CEB)cleaning dosage and cleaning cycle,were optimized.The influence of the operating parameters on the water purification efficiency and membrane contamination control of the ultrafiltration process was analyzed,so as to determine the stable operating parameters of the ultrafiltration process.The results show that the ultrafiltration system could operate stably with a membrane flux of 60～80 LMH and a filtration cycle of 30～60 min.The cleaning dosage of 250～500 ppm CEB could ensure the cleaning effect under different influent conditions.The ultrafiltration system could operate stably with a 7-day cleaning cycle.Moreover,the variation of the operating parameters has no significant effect on the quality of the produced water.
维普
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