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Fibrous coalescence filtration in treating oily wastewater: A review
Journal of Industrial Textiles ( IF 3.2 ) Pub Date : 2021-08-31 , DOI: 10.1177/15280837211040863
Chandra Jeet Singh 1 , Samrat Mukhopadhyay 1 , Raju Seenivasan Rengasamy 1
Affiliation  

Many industries discharge oil-in-water emulsion in the waste stream, often above the permissible limit causing serious environmental hazards. Porous media such as membrane and coalescence beds are employed to treat oily wastewater. A coalescence bed filter consists of either fibrous or granular packing and is used for removing larger oil droplets less than 100 μm from secondary emulsions. Fibrous media have higher porosities and specific surface areas than coarse granular media and hence give higher oil removal efficiency. To design an efficient fibrous coalescence bed filter for treating industrial discharge, understanding the mechanism of oil separation is important. This involves the surface wettability of fibers relating to surface chemistry and roughness. Further, fiber diameter, filter bed’s height, porosity, and pore size in relation to the oil droplet size and throughput and influent oil concentration are interactive parameters that affect the efficiency of coalescence. The performance of coalescence filtration is evaluated by analyzing the oil concentrations and D50 droplet sizes in the influent and effluent. In this article, the above-mentioned subjects are comprehensively reviewed from the reported research works, which highlights the complex nature of fibrous coalescence filtration.



中文翻译:

含油废水处理中的纤维聚结过滤:综述

许多行业在废物流中排放水包油乳液,通常超过允许的限度,造成严重的环境危害。多孔介质如膜床和聚结床用于处理含油废水。聚结床过滤器由纤维或颗粒填料组成,用于从次级乳液中去除小于 100 μm 的较大油滴。纤维介质比粗颗粒介质具有更高的孔隙率和比表面积,因此具有更高的除油效率。要设计用于处理工业排放的高效纤维聚结床过滤器,了解油分离机制很重要。这涉及与表面化学和粗糙度相关的纤维的表面润湿性。此外,纤维直径、滤床高度、孔隙率、与油滴尺寸和吞吐量以及流入油浓度相关的孔径和孔径是影响聚结效率的交互参数。通过分析进水和出水中的油浓度和 D50 液滴尺寸来评估聚结过滤的性能。在本文中,从报告的研究工作中全面回顾了上述主题,突出了纤维聚结过滤的复杂性。

更新日期:2021-08-31
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