Different fouling modes of submerged hollow-fiber and flat-sheet membranes induced by high strength wastewater with concurrent biofouling
Different fouling modes of submerged hollow-fiber and flat-sheet membranes induced by high strength wastewater with concurrent biofouling
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DOI：
10.1016/j.desal.2004.12.030
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发表时间：
2005-08-15
期刊：
影响因子：
9.9
通讯作者：
Fukushi, K
中科院分区：
文献类型：
--
作者：
Hai, FI;Yamamoto, K;Fukushi, K
探索两个主要的商业化平板和中空纤维膜在浸没式膜真菌反应器进料与合成的纺织废水显示显着差异的程度和机制之间的两种类型的污染，表明一个特定的情况下，选择范围之间的两个工业废水处理。中空纤维膜表现出由真菌和淀粉组成的滤饼层的污染，强度与操作通量（0.05-0.3 m/d）成正比。相反，平板膜遭受超过0.2 m/d的临界通量的立即内部孔堵塞。在实验过程中的主要成分的合成废水分别，而介质中只含有淀粉和染料引起的污染可以忽略不计，通量依赖性的孔堵塞是显而易见的中空纤维（0.288米/天）和平板膜（1.3米/天）的淀粉和染料的混合物。尽管这两种膜都实现了99%的显着颜色和97%TOC去除，但在相似条件下两种类型和在不同暴露条件下相同类型的膜具有不同模式和强度的结垢保证了开发用于这种柠檬酸盐废水的合适模块。
Exploration of two major commercialized flat-sheet and hollow-fiber membranes in a submerged membrane fungi reactor fed with a synthetic textile wastewater revealed striking differences in the extent and mechanism of fouling between the two types, indicating a case-specific scope of choice between the two for industrial wastewater treatment. The hollow-fiber membrane exhibited fouling with a cake layer composed of fungi and starch, intensity being proportional to the operating flux (0.05-0.3 m/d). Conversely, the flat-sheet membrane suffered from immediate internal pore blocking beyond a critical flux of 0.2 m/d. During the experiment with major constituents of the synthetic wastewater separately, while media containing only starch and only dye induced negligible fouling, flux-dependent pore blocking was evident for both the hollow-fiber (0.288 m/d) and flat-sheet membranes (1.3 m/d) for the mixture of starch and dye. Despite a remarkable 99% color and 97% TOC removal achieved by both membranes, fouling with different modes and intensity for the two types under similar conditions and for the same type of membrane under different exposure conditions warrants development of suitable modules for such recalcitrant wastewater.