A cartridge based fibrous filtration system has been designed and investigated. For the fibrous medium, needle-punch nonwoven structure has been selected and different nonwoven samples are analysed for the water purification. A series of different needle-punched nonwovens made of polypropylene have been produced by changing mass per unit area, needling density and fibre linear density. A chemical oxygen demand test has been employed to obtain the filtration efficiency (FE). The FE obtained for these samples ranges from 8.84% to 78.04% in purifying the reference water (mud water). It has been found that the FE increases with increase in mass per unit area and needling density (p < 0.01). Also, the filter media made of finer fibres displays higher FE than coarser fibre (p < 0.01). On examining the filter performance in multiple filtration cycles, it is found that the FE increases initially and finally reaches to a saturation value. A good correlation (r² > 0.95) has been found for the FE of each cycle with the air permeability, thickness and weight density of the loaded filter. The FE of the bare nonwoven (maximum FE) further improves (95%) by incorporating activated particles.

中文翻译：

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使用无纺布筒式过滤器系统进行水过滤

基于筒的纤维过滤系统已被设计和研究。对于纤维介质，已选择针刺非织造结构，并分析了不同的非织造样品进行水净化。通过改变单位面积的质量，针刺密度和纤维线密度，可以生产出一系列由聚丙烯制成的针刺无纺布。已使用化学需氧量测试来获得过滤效率（FE）。这些样品在纯化参比水（泥水）时获得的FE为8.84％至78.04％。已经发现，FE随着单位面积质量和针刺密度的增加而增加（p ＜0.01）。而且，由较细纤维制成的过滤介质显示出的FE比较粗纤维高（p <0.01）。在检查多个过滤循环中的过滤器性能时，发现FE最初增加，最终达到饱和值。良好的相关性（对于每个循环的FE，发现r ² > 0.95），且其透气度，厚度和所装载过滤器的重量密度均如此。通过掺入活性颗粒，裸露无纺布的FE（最大FE）进一步提高（95％）。