The influence of granular materials on the operation and membrane fouling characteristics of submerged MBRs
The influence of granular materials on the operation and membrane fouling characteristics of submerged MBRs
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DOI：
10.1016/j.memsci.2014.05.057
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发表时间：
2014-11
影响因子：
9.5
通讯作者：
Tokihiro Kurita;K. Kimura;Y. Watanabe
中科院分区：
文献类型：
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作者：
Tokihiro Kurita;K. Kimura;Y. Watanabe
在膜生物反应器(MBR)中，用于减轻膜污染的曝气是能耗的最大部分。为了减少MBR运行过程中的能耗，必须开发其他方法来控制膜污染。由于颗粒对膜表面的机械清洗作用，应在浸没式膜生物反应器中引入颗粒以减轻膜污染。本研究评估了投加颗粒物可减少浸没式MBR曝气量的可能性，并考察了投加颗粒物时的膜污染特性。两个小试MBR与合成废水并行运行，并将颗粒引入一个MBR。颗粒膜生物反应器运行稳定，曝气后仍可减少50%。可逆性污垢几乎完全通过颗粒的引入得到控制。然而，由于滤饼的去除，颗粒促进了不可逆的污垢，起到了动态过滤的作用。颗粒物的总体好处是明显的；尽管在没有颗粒物的情况下，可逆性污染占主导地位。颗粒使用不同，污染特征也不同。这些特性变化也可以用没有动态过滤效应来解释。
Aeration to mitigate membrane fouling accounts for the largest fraction of energy consumed in membrane bioreactors (MBRs). To reduce the energy consumed during MBR operation, alternative methods must be developed to control membrane fouling. Granules should be introduced into submerged MBRs to mitigate membrane fouling due to their mechanical cleaning effect on the membrane surface. This study assessed the possible reduction in aeration for submerged MBRs through introducing granules and investigated membrane fouling characteristics from using granules. Two bench-scale MBRs operated in parallel with synthetic wastewater, and granules were introduced into one MBR. The MBR with granules operated stably even after aeration was reduced by 50%. Reversible fouling was almost entirely controlled through the introduction of granules. However, the granules promoted irreversible fouling due to cake elimination, which acted as a dynamic filter. The overall benefit from granules was apparent; although, reversible fouling dominated in the absence of granules. The foulant characteristics differed with granule use. These characteristic changes were also explained by the absence of the dynamic filtration effect.