Effects of the Water Head-Drop on Performance of the Self-Forming Bio-Dynamic Membrane
出水水头对自生生物动态膜过滤性能的影响

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 35L·(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 10d when the WHD was 0.5cm in the recovery stage, but it was less than 5h when the WHD was 10cm. The causes of these phenomena were analyzed. It was proposed that each running cycle of the SFDM be started at the WHD of zero.