Meidensha Corporation

Kazuhiro Toyooka

Shigeo Sato

Hiroshi Noguchi

A membrane separation apparatus in which a membrane clogging is moderated to lower a load to filtering. A plurality of separation membranesare stored vertical and parallel to each other inside the a casingformed with opening sections which respectively open in upper and lower directions thereby configuring a membrane module. In a flow passage through which treated water for the membrane moduleflows, a water flow guideis provided such that an opening area Sof the flow passage through which treated water outflows is smaller than an opening area Sof the flow passage through which treated water inflows. Additionally, a plurality of the membrane modulesare stacked one upon another in a direction of height of a casing thereby to configure a membrane unit. An air diffusing deviceis disposed below this membrane unitthereby configure a membrane separation apparatus

Membrane module, membrane unit, and membrane separation device

In a membrane separation apparatus, a cleaning effect for membrane elements by scrubbing is improved. In the membrane separation apparatusincluding a separation membrane(membrane element) dipped in treated liquid in a treatment bath, and air diffusing meansfor diffusing air bubblesfor cleaning the separation membrane, an air bubbles staying plateis provided between the air diffusing meansand the separation membrane. The air bubbles staying plateis configured to allow air bubblesdiffused from the air diffusing deviceto stay, by which air bubblesgather each other to form air bubbleshaving large diameters. By causing air bubbles having large diameters to act on the separation membrane, air bubblescan be allowed to act whole the separation membrane

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Yokohama, Japan

Kazuhiro Toyooka