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Investigation of ceramic membranes performance for tannery wastewater treatment

机译:陶瓷膜处理制革废水性能的研究

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The objective of this study was to investigate the treatment of highly polluted tannery wastewater using ceramic microfiltration (MF) and ultrafiltration (UF) membranes. The impact of membrane pore size and pressure on permeate flux, chemical oxygen demand (COD), and color reduction was examined. All experiments were performed at a lab-scale, using cross-flow ceramic membrane test unit. Three different single-channel tubular ceramic membrane modules (gamma-Al2O3, Media, and Process Technology, Inc., USA) with average pore sizes of 10, 50, and 200 nm were used. Wastewater sample was obtained from the effluent of tannery at organized industrial district of the city of Isparta, Turkey. Clean water flux tests were conducted before and after wastewater treatment. Permeate flux was reduced due to membrane fouling after all operation and fouling was removed effectively using chemical cleaning procedures. More than 95% color removal was consistently achieved with both UF membranes (10 and 50 nm). COD reductions ranged between 58 and 90% at all pressures for UF membranes tested in the wastewater. As the test pressure of the UF ceramic membranes increased, COD and color reduction also increased. It was concluded that ceramic UF membranes with 10 nm average pore size can be used in removing COD and color from highly polluted tannery wastewater.
机译:这项研究的目的是研究使用陶瓷微滤(MF)和超滤(UF)膜处理高污染皮革厂废水的方法。检查了膜孔径和压力对渗透通量,化学需氧量(COD)和颜色减少的影响。所有实验均使用错流陶瓷膜测试装置以实验室规模进行。使用了三种平均孔径分别为10、50和200 nm的不同的单通道管状陶瓷膜组件(γ-Al2O3,Media and Process Technology,Inc。,美国)。废水样品是从土耳其伊斯巴达市有组织的工业区的制革厂废水中获得的。在废水处理之前和之后进行净水通量测试。在所有操作之后,由于膜结垢而降低了渗透通量,并使用化学清洁程序有效地去除了结垢。两种超滤膜(10和50 nm)均能始终实现95%以上的脱色。在废水中测试的超滤膜在所有压力下,化学需氧量的减少范围在58%至90%之间。随着超滤陶瓷膜测试压力的增加,化学需氧量和颜色减少也增加。结论是,平均孔径为10 nm的陶瓷超滤膜可用于去除高污染制革废水中的COD和颜色。

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