Membrane element for flat membrane bioreactor and flat membrane bioreactor

Abstract

The invention discloses a membrane element for a flat membrane bioreactor and a flat membrane bioreactor. The membrane element comprises: a first filter membrane layer, a mesh layer and a second filter membrane layer; a first filter membrane layer, a mesh layer The grid layer and the second filter membrane layer are stacked in sequence and sealed at the edges to form an inner membrane cavity between the first filter membrane layer and the grid layer, and between the grid layer and the second filter membrane layer; There is a water outlet at the center and a fixed structure at the top edge. The invention can reduce the filtration resistance, enhance the filtration capacity, reduce the pollution of the mud cake layer on the membrane surface, reduce the manufacturing cost and increase the packing density.

Description

technical field [0001] The invention belongs to the field of water treatment equipment, and more particularly, relates to a membrane element used for a flat membrane bioreactor and a flat membrane bioreactor. Background technique [0002] Membrane and membrane process is a new and efficient modern separation technology, which is the product of multidisciplinary crossover. Membrane bioreactor (MBR) is a new type of sewage treatment process that combines membrane separation technology and biological treatment. For membrane bioreactor (MBR) processes, hollow fiber membranes and flat sheet membranes are the two most commonly used membrane product types. Hollow fiber membranes are widely used in large-scale membrane bioreactor (MBR) projects due to their high packing density, while flat membranes are more suitable for small-scale membrane bioreactor (MBR) projects due to their strong anti-fouling ability and easy maintenance. and decentralized sewage treatment plants. Technical...

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Problems solved by technology

[0003] The current flat membrane elements generally have problems such as large area, few water-producing channels on the surface of the support layer, and unreasonable structure of flat membrane elements, which lead to low filling density of flat membrane bioreactors (MBR) and increase operating costs.

In addition, in order to consider the convenience of later disassembly or replacement when installing the traditional flat membrane element, it is inserted into the corresponding guide rail slot plate from top to bottom, and there is friction when it is pulled and inserted, which leads to installation or It is difficult to disassemble. Secondly, the traditional flat membrane uses acrylonitrile / butadiene / styrene copolymer plate as the support layer of the membrane cavity, which not only increases the manufacturing cost of the flat membrane element, but also reduces the packing density per unit area.

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