Center for Water Resource Cycle Research, Korea Institute of Science and Technology, 39-1 Hawalgok-dong, Seongbuk-gu, Seoul, South Korea.
Bioprocess Biosyst Eng. 2012 Oct;35(8):1389-98. doi: 10.1007/s00449-012-0727-z. Epub 2012 May 5.
Non-woven fabric filter- (NWFF) and microfilter-MBR modules were made using 100 μm polypropylene and 0.25 μm polyethylene materials, respectively. The performances and mechanisms of the two processes were investigated, including additional batch filtration tests to find the function of the dynamic gel layer on the membrane surface. The HRT of both MBRs was 9 h and the operating permeate flux was 13 L/m(2)/h. The two MBRs consisted of an anoxic and aerobic reactor. The NWFF or microfilter (MF) was submerged in each of the aerobic reactors. The two MBRs showed similar performances for the removal of organic matters, suspended solids and nitrogen. Cake formation on the NWFF contributed to major resistance, while the gel layer on the microfilter or internal fouling of the pores played a key role in the fouling of the membrane surface. The amount of soluble extracellular polymer substances (EPS) (13 mg/L) of the attached sludge on the NWFF surface was larger than that (11 mg/L) of that suspended sludge. Consequently, the functional gel layer for the coarse and microfilter is established based on the relationship among the EPS, transmembrane pressure and MLSS.
无纺纤维过滤器（NWFF）和微滤膜-MBR 模块分别采用 100μm 的聚丙烯和 0.25μm 的聚乙烯材料制成。研究了这两种工艺的性能和机理，包括额外的分批过滤测试，以发现膜表面动态凝胶层的作用。两种 MBR 的 HRT 均为 9h，运行渗透通量为 13L/m(2)/h。两个 MBR 由缺氧和好氧反应器组成。NWFF 或微滤器（MF）浸没在每个好氧反应器中。两种 MBR 在去除有机物、悬浮物和氮方面表现出相似的性能。NWFF 上的滤饼形成导致主要阻力，而微滤器上的凝胶层或孔内污垢则在膜表面污垢中起关键作用。NWFF 表面附着污泥的可溶细胞外聚合物物质（EPS）（13mg/L）量大于悬浮污泥的 EPS（11mg/L）量。因此，基于 EPS、跨膜压力和 MLSS 之间的关系，为粗滤和微滤建立了功能凝胶层。
