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首页> 美国卫生研究院文献>Membranes >On The Relationship between Suspended Solids of Different Size the Observed Boundary Flux and Rejection Values for Membranes Treating a Civil Wastewater Stream
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On The Relationship between Suspended Solids of Different Size the Observed Boundary Flux and Rejection Values for Membranes Treating a Civil Wastewater Stream

机译：不同尺寸的悬浮物观察到的边界通量与处理民用废水膜的排斥值之间的关系

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Membrane fouling is one of the main issues in membrane processes, leading to a progressive decrease of permeability. High fouling rates strongly reduce the productivity of the membrane plant, and negatively affect the surviving rate of the membrane modules, especially when real wastewater is treated. On the other hand, since selectivity must meet certain target requirements, fouling may lead to unexpected selectivity improvements due to the formation of an additional superficial layer formed of foulants and that act like a selective secondary membrane layer. In this case, a certain amount of fouling may be profitable to the point where selectivity targets were reached and productivity is not significantly affected. In this work, the secondary clarifier of a step sludge recirculation bioreactor treating municipal wastewater was replaced by a membrane unit, aiming at recovering return sludge and producing purified water. Fouling issues of such a system were checked by boundary flux measurements. A simple model for the description of the observed productivity and selectivity values as a function of membrane fouling is proposed.
机译：膜结垢是膜工艺中的主要问题之一，导致渗透性逐渐降低。高结垢率会大大降低膜设备的生产率，并对膜组件的存活率产生负面影响，尤其是在处理实际废水时。另一方面，由于选择性必须满足某些目标要求，结垢可能会导致意外的选择性提高，这是由于形成了由结垢剂形成的附加表层，该表层的作用类似于选择性二级膜层。在这种情况下，一定程度的结垢可能有益于达到选择性目标且生产率不会受到显着影响的点。在这项工作中，旨在处理回水污泥并产生纯净水的膜单元取代了处理市政废水的分步污泥再循环生物反应器的二级澄清池。通过边界通量测量检查了这种系统的结垢问题。提出了一个简单的模型，用于描述观察到的生产率和选择性值与膜污染的关系。

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