Dynamic Membrane Formation Mechanisms of a Combined Coagulation Dynamic Membrane Process in Treating Polluted River Water at a Constant Pressure

2009 3rd International Conference on Bioinformatics and Biomedical Engineering Pub Date : 2009-06-11 DOI:10.1109/ICBBE.2009.5162667

Chunhua Xu, B. Gao, Baichuan Cao, Weifeng Liu, Yang Song, Dandan Cheng

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引用次数: 1

Abstract

The dynamic membrane formation mechanisms and filtration mechanisms were investigated at 4 cm and 8 cm water head drop (WHD). Flux variation, resistance plot curve shape, the relationship t/V - t and t/V - V were investigated to study the dynamic membrane formation and filtration. And effluent turbidity and particles size distribution were also used to demonstrate the effluent particles size. Based on the flux stability, the dynamic membrane formation time is 120 min and 70 min for 4 cm and 8 cm WHD respectively. According to the forces analysis of a streaming particle, the reason was given about less time is needed for the dynamic membrane formation at higher WHD. Through the analysis of the resistance curve plot and the relationship of t/V - t and t/V - V, the dynamic membrane firstly is formed by cake growth, then small particles were captured by the formed cake, in this stage internal fouling is the dominant mechanism. After the dynamic membrane formation, screening becomes leading operation for particles removal including lager particles and small particles. Turbidity was used to illuminate the suspended solids in the effluent. Effluent turbidity shows that the membrane module occupies the good ability for particles removal before the dynamic membrane formation. Particles size distribution indicates that particles removal ability was formed gradually.

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恒压联合混凝动膜工艺处理污染河水的动态成膜机理

研究了4 cm和8 cm水头下的动态成膜机理和过滤机理。考察了通量变化、阻力图曲线形状、t/V - t和t/V - V的关系，以研究动态膜的形成和过滤。用出水浊度和粒径分布来表征出水粒径。基于通量稳定性，在4 cm和8 cm WHD条件下动态成膜时间分别为120 min和70 min。通过对流态颗粒的受力分析，给出了在高水位差条件下动态成膜所需时间较短的原因。通过对阻力曲线图和t/V - t、t/V - V关系的分析，发现动态膜首先由滤饼生长形成，然后小颗粒被形成的滤饼捕获，这一阶段内部结垢是主要机理。动态成膜后，筛分成为除颗粒的主要操作，包括大颗粒和小颗粒。浊度被用来说明废水中的悬浮物。出水浊度表明，该膜模块在动态成膜前具有良好的颗粒去除能力。粒径分布表明，颗粒去除能力是逐渐形成的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2009 3rd International Conference on Bioinformatics and Biomedical Engineering

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