Integrated bubbleless aeration membrane bioreactor

A membrane bioreactor, bubble-free aeration technology, applied in sustainable biological treatment, aerobic process treatment and other directions, can solve the problems of material-liquid mixing device defects, unreasonable membrane structure, high cost, and achieve convenient and accurate control of aeration Gas volume, convenient operation, and the effect of meeting the needs of oxygen consumption

Inactive Publication Date: 2012-07-04
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 p

Method used

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  • Integrated bubbleless aeration membrane bioreactor
  • Integrated bubbleless aeration membrane bioreactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] refer to figure 1 , an integrated non-foam aeration membrane bioreactor, with a biochemical reactor 6, a hollow fiber curtain membrane 7 is vertically placed in the biochemical reactor 6, and the hollow fiber curtain membrane 7 is made of hydrophobic polyvinylidene fluoride. Vinyl material. The upper and lower ends of the hollow fiber curtain membrane 7 are respectively fixed in the side wall of the single-pass PVC pipe with resin. It is connected with the exhaust pipe, the intake pipe is connected with the air compressor 3 through the air rotameter 5 , and the exhaust pipe leads to the air through the gas fine-tuning valve 16 .

[0027] The instrument is provided with a feeding box 1, which is communicated with the lower part of the biochemical reactor 6 through a sewage conveying pipeline, and a booster pump 2 and a liquid rotameter 4 are arranged on the sewage conveying pipeline. The top of the biochemical reactor 6 is provided with an overflow weir 13 , an overflo...

Embodiment 2

[0030] like figure 1 As shown in Example 1, the submersible pump 8 is also provided at the bottom of the biochemical reactor 6, the submersible pump 8 is connected with the outer circulation pipeline 11, and the outer circulation pipeline 11 is connected to the hollow fiber curtain membrane 7 Above, the outer circulation pipeline 11 is provided with a throttle valve 9 and a liquid rotameter 10. Two branch return pipes 15 are provided at the end of the outer circulation pipeline 11 above the hollow fiber curtain membrane 7 , and the two branch return pipes 15 are located on both sides of the hollow fiber curtain membrane 7 .

[0031] The apparatus described in Example 2 can simultaneously realize the plug flow operation and the fully mixed flow operation of the material.

[0032] The working process is as follows: the sewage passes through the booster pump 2, and is fed into the biochemical reactor 6 from the feeding box 1, and the feeding time is controlled by the liquid rota...

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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, water shortage has become a global problem, and my country's water shortage situation is particularly severe. my country's per capita water resources are only 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 of lakes. Especially in recent years, with the rapid development of society and economy, the demand for water in industry and agriculture has increased rapidly, and the problem of water resources waste and pollution has become increasingly serious, making the pr...

Claims

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Application Information

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IPC IPC(8): C02F3/02
CPCY02W10/10
Inventor 詹世平张虹
Owner DALIAN UNIV
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