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首页> 外文期刊>Journal of industrial and engineering chemistry >Split injection of coagulant to enhance the water permeability of a cake layer in a coagulation-microfiltration process
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Split injection of coagulant to enhance the water permeability of a cake layer in a coagulation-microfiltration process

机译：分凝注入凝结剂以提高凝结-微滤过程中滤饼层的透水性

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摘要

A split injection of an aluminum coagulant at the initial stage of rapid mixing was investigated to improve the water permeability of a cake layer composed of chemical flocs on a microfiltration membrane surface. The split ratio of the first to second injections was changed to find an optimized injection condition. With an increase in the split ratio, the cake compressibility index decreased because compact chemical flocs were produced with reduced dosage of the second injection, but the specific cake resistance increased due to small size of chemical flocs with the insufficient amount of coagulant at the second injection. At a small split ratio, the particle size distribution of the split injection was similar to that of normal single injection, and the compressibility index was small, leading to better water permeability of the cake layer at higher pressure. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：为了快速改善微滤膜表面上由化学絮凝物组成的滤饼层的透水性，研究了快速混合初期分批注入的铝凝结剂。更改第一次进样与第二次进样的分流比，以找到最佳的进样条件。随着分流比的增加，饼的压缩指数降低，因为在第二次注射的剂量减少时产生了致密的化学絮凝物，但是由于第二次注射时凝结剂的量不足，化学絮凝物的尺寸小，因此比饼抗性增加。 。在较小的分流比下，分流进样的粒度分布与常规单次进样相似，可压缩性指数也较小，从而导致滤饼层在较高压力下具有更好的透水性。 （C）2014大韩工业化学工程学会。由Elsevier B.V.发布。保留所有权利。

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