波纹微通道湍流促进器减缓SFMBR的膜污染效果分析

Analysis the effect of corrugated micro-channel turbulence promoter on reducing membrane fouling of SFMBR

主要通过浸没式平板膜生物反应器的膜污染阻力分布和膜表面的污染特性来分析波纹微通道湍流促进器减缓浸没式平板膜生物反应器的膜污染效果.结果表明,波纹微通道湍流促进器有效地降低了总阻力Rt,降低率达到68.01%,其中的Rrf、Rc和Rp+Ra分别降低54.20%、87.98%和84.00%;滤饼层厚度、有机和无机污染成分都减少,且污染层更易去除.综合膜污染阻力分布和膜表面污染物表征结果从扰流作用强化机理、逆扩散机理、絮凝机理和微孔强化过滤机理四个方面分析了波纹微通道湍流促进器减缓浸没式平板膜生物反应器膜污染的效果.

The aim of the present research was to analyze the effect of corrugated micro-channel turbulence promoters（MCTP） on reducing membrane fouling by investigating the membrane fouling resistance and membrane fouling characteristics of a submerged flat-sheet membrane bioreactor（SFMBR）. The results demonstrated that the corrugated micro-channel turbulence promoters could effectively reduce the total resistance Rt（68.01%）, in which the Rrf, Rc and Rp＋Ra were reduced 54.20%, 87.98% and 84% respectively, the thickness of the cake layer was diminished, the contents of organic and inorganic foulants of SFMBR equipped with MCTP were reduced, and the cake layer was more easily removed by hydraulic conditions compared with the traditional SFMBR. According to membrane fouling resistance distribution and membrane fouling characterization results, the effect of corrugated micro-channel turbulence promoters on reducing membrane fouling was analyzed from the four aspects（turbulent mechanism, counter-diffusion mechanism, flocculation mechanism and the micro-pore enhance mechanism）.