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首页> 外文会议>International Conference on Chemical Engineering and Advanced Materials >Effect of Modified Diatomite Addition on Sludge Properties for Membrane Fouling Alleviation in Submerged Membrane Bioreactor
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Effect of Modified Diatomite Addition on Sludge Properties for Membrane Fouling Alleviation in Submerged Membrane Bioreactor

机译：改性硅藻土对浸没膜生物反应器膜污染污泥特性的影响

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摘要

To alleviate the membrane fouling in membrane bioreactor, a kind of modified diatomite was used as anti-fouling agent to examine the effect on sludge properties in submerged membrane bioreactor for synthetic domestic wastewater treatment. Three submerged membrane bioreactor setups were operated under fixed membrane flux 21.9m /m -h, meanwhile, modified diatomite was added into each membrane bioreactor with dosage of 0mg/L, 1000mg/L and 2000mg/L respectively. Sludge particle size, extracellular polymeric substances and molecular weight distribution were characterized as the activated sludge properties in this study. The experiment results showed that with the increase of modified diatomite dosage, the number of sludge particle size less than 10μm was declined, however, the number between 10-20μm was increased correspondingly. Total extracellular polymeric substances and big molecular weight substances were decreased remarkably with modified diatomite addition dosage of 1000mg/L. The results indicated that addition of modified diatomite could effect of sludge properties in submerged membrane bioreactor. Therefore, membrane filtration performance could be improved by modified diatomite adding which alleviate membrane fouling directly.
机译：为了缓解膜生物反应器中的膜污染，一种改性的硅藻土用作防污剂，以检查淹没膜生物反应器中的污泥性能，用于合成国内废水处理。在固定膜通量21.9m / m-H下，将三种浸没膜生物反应器设置在21.9m / m-h下操作，分别用0mg / L，1000mg / L和2000mg / L的剂量加入修饰的硅藻土。污泥粒度，细胞外聚合物物质和分子量分布的特征在于该研究中的活性污泥性能。实验结果表明，随着改性的硅藻土剂量的增加，污泥粒径小于10μm的次数下降，然而，相应地增加10-20μm。具有1000mg / L的改性硅藻土添加剂量显着降低全细胞外聚合物物质和大分子量物质。结果表明，添加改性的硅藻土可以对浸没膜生物反应器中的污泥性能产生影响。因此，通过改性的硅藻土加入直接缓解膜污染的硅藻土可以改善膜过滤性能。

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