Nywening J P, Zhou H, Husain H
CH2M Hill Canada, 255 Consumers Road, Toronto, Ontario M2L 5B6, Canada.
Water Sci Technol. 2007;56(6):155-62. doi: 10.2166/wst.2007.644.
Parallel experimental tests to measure mixed liquor filterability for submerged membrane bioreactors were conducted over a six month period using three ZW-500 pilot plants and a ZW-10 lab-scale filterability apparatus. Non-air sparged conditions during the tests yielded operation behaviour that was equivalent to dead-end filtration. The fouling resistance increased linearly with the intercepted mass until a critical point was reached at which point significant cake compression was induced and the resistance began to increase exponentially. Although the point of cake compression appears to be dependent on the membrane module design, similar resistance per unit solid mass intercepted per unit area (R(mass)) values were observed when the same mixed liquor was filtered. Coupled with the established correlation between the R(mass) and the critical flux, it is suggested that the filterability test results from a side-stream, lab-scale module may be used to predict fouling potential in a full scale MBR wastewater treatment system without interrupting the full-scale MBR operation.
在六个月的时间里，使用三个ZW - 500中试装置和一个ZW - 10实验室规模的过滤性能测试装置，对浸没式膜生物反应器的混合液过滤性能进行了平行实验测试。测试过程中不进行曝气的条件产生了等同于死端过滤的运行行为。污垢热阻随截留质量线性增加，直到达到一个临界点，此时会引起显著的滤饼压缩，热阻开始呈指数增加。尽管滤饼压缩点似乎取决于膜组件设计，但当过滤相同的混合液时，观察到单位面积截留的单位固体质量的热阻（R(mass)）值相似。结合R(mass)与临界通量之间已建立的相关性，表明来自旁流实验室规模膜组件的过滤性能测试结果可用于预测全尺寸膜生物反应器废水处理系统中的污垢潜力，而无需中断全尺寸膜生物反应器的运行。
