Patent ID: 9044714
Filing Date: 2015-06-02
Classification: B01D,C02F,Y02W

Abstract:
1. A membrane module comprising: a casing including a flow passage through which treated water outflows and a flow passage through which treated water inflows, wherein an opening area of the flow passage through which treated water outflows is smaller than an opening area of the flow passage through which treated water inflows; a plurality of membrane elements stored inside the casing, each membrane element comprising a flat membrane; and a water flow guide is disposed in the casing to reduce the opening area of the flow passage through which treated water outflows, wherein the water flow guide has a stepped shape including a first surface section and a second surface section closer to the opening of the flow passage through which treated water outflows, wherein the first and second surface sections are substantially parallel to surfaces of the membrane elements, and wherein the second surface section is closer to the membrane elements than the first surface section.