Gas stripping internal circulation membrane tank

Abstract

The invention discloses a gas stripping internal circulation membrane tank. A circular tank body with an inner cylinder and an outer cylinder is adopted as a reactor, an anaerobic unit is arranged at the upper part of the outer cylinder, an anoxic unit is arranged below the anaerobic unit in the outer cylinder, an aerobic unit is arranged in the inner cylinder, the aerobic unit communicates with the anoxic unit, an MBR membrane stack is placed in the inner cylinder, and a gas collecting hood is arranged at the top of the MBR membrane stack; and a backwashing water tank and a gas stripping backflow water tank are arranged above the circular tank body, the gas stripping backflow water tank is connected with the gas collecting hood through a pipeline, backflow water of the gas stripping backflow water tank is connected with the anaerobic unit, and the backwashing water tank is connected with effluent of the MBR membrane stack through a suction pump and a pipeline. The problems of high treatment cost, large occupied area and the like caused by natural release of a large amount of aeration gas and backflow through a backflow pump in a traditional MBR membrane technology are solved, aeration resources are fully utilized, aeration air is collected, gas stripping backflow is performed, and energy consumption is reduced; and in addition, the occupied area is small, and the large advantages are achieved in integration and modularization application.

Description

technical field [0001] The invention relates to a complete set of waste water treatment equipment, in particular to an air lift internal circulation membrane tank. Background technique [0002] With the continuous improvement of my country's water environment quality requirements, the discharge standards are becoming more and more stringent for the treatment of industrial wastewater and domestic sewage, and there is an urgent need for the support of corresponding advanced treatment technologies. At present, membrane bioreactor (MBR) The process is widely used in domestic sewage, difficult organic wastewater and other fields. [0003] The MBR process is a new type of high-efficiency sewage treatment process that combines membrane separation technology with traditional biological treatment technology. It uses membrane separation technology to intercept the activated sludge and macromolecular organic substances in the biological reaction tank, replacing the traditional two. The...

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Problems solved by technology

[0005] The purpose of the present invention is to provide an air-lift internal circulation membrane tank with mature technology, reliability, good operation stability, high treatment efficiency, good effect, less land occupation, low investment and low operating cost, which solves the problem of traditional MBR membrane There are problems in the technology, such as the natural release of a large amount of aeration gas, the high processing cost caused by the return flow through the return pump, and the large area occupied.

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