Integrated bubbleless aeration membrane bioreactor

Abstract

The invention discloses an integrated bubbleless aeration membrane bioreactor. A hollow-fiber curtain type membrane (7) is vertically placed in a biochemical reactor (6), the upper and the lower ends of the hollow-fiber curtain type membrane (7) are respectively fixed in the sidewalls of one-way PVC (polyvinyl chloride) tubes by resin, the PVC tube on the lower end of the hollow-fiber curtain type membrane (7) is connected with an intake tube, the PVC tube on the upper end of the hollow-fiber curtain type membrane (7) is connected with an exhaust tube, the intake tube is connected with an air compressor (3) through an air rotameter (5), and the exhaust tube leads into the air via a gas fine-regulating valve (16). Because the integrated bubbleless aeration membrane bioreactor adopts the hollow-fiber curtain type membrane structure, the oxygen utilization rate approximates 100 percent, the air is inputted from the air compressor via the lower end of the hollow-fiber curtain type membrane, and flows in the hollow-fiber membrane tube cavities, the oxygen in the tube cavities is pushed by the difference between the oxygen partial pressures of both sides of the membrane to directly disperse into the external biomembrane via the membrane wall or micropores on the membrane wall, consequently, the oxygen transfer efficiency is greatly increased, the requirement of the microbiological oxidative degradation of organic pollutants on oxygen consumption is met, and moreover, the gas fine-regulating valve after the exhaust tube can be utilized to effectively and stably control the pressure and flow velocity of gas, so that the aeration quantity can be conveniently and accurately controlled.

Description

Technical field: [0001] The invention relates to a sewage treatment device, in particular to a membrane bioreactor. Background technique: [0002] With the development of social economy and population growth, the shortage of water resources has become a global problem, and the situation of water shortage in my country is particularly severe. my country's per capita water resources are only equivalent to 1 / 4 of the world's per capita water resources, and it is one of the 13 countries with very few per capita water resources in the world. At the same time, water pollution is becoming more and more serious. The organic pollution of surface water in the seven major river basins in the country is serious, mainly due to the prominent problem of eutrophication in lakes. Especially in recent years, with the rapid development of social economy, the demand for industrial and agricultural water has grown rapidly, and the problem of water resource waste and pollution has become increa...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the unreasonable membrane structure in the prior art, which is only suitable for a single operation, and the material-liquid mixing device has defects and high cost, etc., and provides an optimized membrane structure, which is suitable for both continuous operation and intermittent operation, and can realize Plug flow and fully mixed flow integrated non-bubble aerated membrane bioreactor

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