Pipe type membrane element and submerged membrane bioreactor

Abstract

The invention discloses a pipe type membrane element and a submerged membrane bioreactor. The submerged membrane bioreactor comprises a reaction tank and a membrane element, wherein the membrane element is positioned in the reaction tank and comprises an inner cavity and a water-permeable cylindrical supporting layer; the outer surface of the supporting layer is wrapped with an organic filter membrane layer; the upper end of the inner cavity is closed, and the lower end of the inner cavity is provided with a water outlet; and the reaction tank is also internally provided with a water collecting disk connected with the water outlet of the membrane element. The invention is difficult to break and block and can effectively reduce the cost of the membrane element and decrease the times of chemical cleaning, thereby prolonging the service life of a membrane and reducing the operation cost.

Description

technical field [0001] The invention relates to water and waste water treatment equipment, in particular to a membrane bioreactor and its membrane elements. Background technique [0002] The existing membrane bioreactor MBR process mainly uses a microfiltration membrane element with a pore size of about 0.1 microns and a membrane filament inner diameter of about 1 mm, and adopts a built-in immersion process to separate the activated sludge mud-water mixture after the biological reaction to achieve water purification. Purpose. The submerged hollow fiber membrane bioreactor, due to its cost advantage, occupies most of the practical application engineering cases, and is the main application form of the membrane bioreactor process. However, in practical engineering applications, hollow fiber membranes have several obvious technical defects: 1. The fibers are easily broken during the vigorous stirring process; 2. It is difficult to clean, and generally need to be taken out of th...

AI Technical Summary

Problems solved by technology

However, in practical engineering applications, hollow fiber membranes have several obvious technical defects: 1. The fibers are easily broken during the vigorous stirring process; 2. It is difficult to clean, and generally need to be taken out of the bioreactor for special cleaning; Density, so that the fiber filaments are easily blocked by the sludge in the reaction tank, and the blockage of the junction between the membrane filaments and the sealant at both ends of the membrane element is the most common sludge blockage

After clogging, the flux of the membrane drops sharply, and the water outlet is unstable, which may easily cause fiber breakage and increase the difficulty of cleaning

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