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Published on: February 13, 2016
[Effects of the water head-drop on performance of the self-forming bio-dynamic membrane]
Bin Fan1, Xia Huang, Zhaokun Luan
1State Key Laboratory of Environmental Aquatic Chemistry, Chinese Academy of Sciences, Department of Environmental Science and Engineering, Tsinghua University, Beijing, China.
Abstract:
To raise the water-head drop (WHD) is unbeneficial to the recovery of the self forming bio-dynamic membrane (SFDM). With the rising of the WHD, the stable flux of the SFDM gradually rised to the maximum, about 35 L.(m2.h)-1, but it had a trend to decline if the WHD was further raised. The duration of the stable stage of the SFDM declined remarkably with the WHD being increased in the recovery stage. The duration of the stable stage was more than 10 d when the WHD was 0.5 cm in the recovery stage, but it was less than 5 h when the WHD was 10 cm. The causes of these phenomena were analyzed. It was proposed that each running cycle of the SFDM be started at the WHD of zero.
