Tubular membrane element and integral membrane bioreactor

Abstract

The invention discloses a tubular membrane element and an integral membrane bioreactor. The integral membrane bioreactor comprises a reaction tank and the membrane element positioned in the reaction tank, and the membrane element comprises an inner cavity and a non-watertight cylindrical supporting layer, wherein the outer surface of the supporting layer is coated with an organic filter membrane layer; the upper end of the inner cavity is closed; the lower end of the inner cavity is provided with a water outlet; and the inside of the reaction tank is also provided with a water-collecting tray which is connected with the water outlet of the membrane element. The tubular membrane member and the integral membrane bioreactor are not easy to be ruptured and blocked, and can effectively reduce the cost of the membrane element and the frequencies of chemical cleaning so as to prolong the service life of the membrane and reduce the running 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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