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Rotary type hollow fiber porous membrane foamless oxygen charging device and method

A rotary, microporous membrane technology, applied in the field of environmental engineering, can solve the problems of polluted air, low oxygen utilization rate, high energy consumption, and achieve the effects of low operating cost, reduced equipment cost and energy consumption, and large water treatment capacity.

Inactive Publication Date: 2009-08-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a rotating hollow fiber microporous membrane bubble-free oxygenation device and its method in order to solve the defects of low oxygen utilization rate, high energy consumption and polluted air in the traditional aeration technology

Method used

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  • Rotary type hollow fiber porous membrane foamless oxygen charging device and method
  • Rotary type hollow fiber porous membrane foamless oxygen charging device and method
  • Rotary type hollow fiber porous membrane foamless oxygen charging device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Three flat curtain hollow fiber membrane devices are used in the rotary bubble-free membrane oxygenation module 13, please refer to figure 1 , the hollow fiber membrane material is polypropylene, the outer diameter is 450 μm, the wall thickness is 40-50 μm, the membrane pore size is 0.1-0.2 μm; the porosity is 40-50%, the bubble point is greater than 0.5Mpa, and the gas flux is greater than 0.05cm 3 / cm 2 ·s·cmHg, the size of the planar curtain hollow fiber membrane module is 45×15cm, the effective length of the membrane filament is 40cm, and the effective area of ​​the membrane is 3m 2 , intermittent exhaust every 1min for 5s, the speed is 20 rpm, the effective volume of the activated sludge aeration tank is 70L, the test water is deoxygenated water, the dissolved oxygen concentration is close to zero, and the air supply is air. The test conditions and results are as follows:

[0040]

Embodiment 2

[0042] Three bundled hollow fiber membrane devices are used in the rotary bubble-free membrane oxygenation module 13, please refer to figure 2 , the hollow fiber membrane material is polypropylene, the outer diameter is 450 μm, the wall thickness is 40-50 μm, the membrane pore size is 0.1-0.2 μm; the porosity is 40-50%, the bubble point is greater than 0.5Mpa, and the gas flux is greater than 0.05cm 3 / cm 2 ·s·cmHg, the effective length of the membrane filament is 40cm, and the effective area of ​​the membrane is 3m 2 , intermittent exhaust every 1min for 5s, the speed is 20 rpm, the effective volume of the activated sludge aeration tank is 70L, the test water is deoxygenated water, the dissolved oxygen concentration is close to zero, and the air supply is air. The test conditions and results are as follows:

[0043]

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Abstract

The invention discloses a rotary type hollow fiber porous membrane foamless oxygen charging device and method. The device comprises a rotary foamless membrane type oxygen charging assemble, an air supplying and exhausting system, a water supplying and draining system and a motor and electrical control system. In the method, the raw water is added in an activated sludge aeration basin, the rotary foamless membrane type oxygen charging assemble rotates in the aeration basin at the speed of several to tens revolutions per minute, the oxygen charging adopts the intermittent air charging and discharging way, the air feeding pressure is controlled under the bubble point of the fiber membrane, the oxygen is dissolved rapidly on the membrane surface and is dispersed into the sludge water under the drive of the concentration difference and the pressure difference, the dissolved oxygen concentration is kept at 1 to 2.5 mg / l, the rotary oxygen charging assemble play the role of the mixing and activated sludge stirring. Compared with the traditional aeration method, the invention has high oxygen transmissibility, good oxygen charging effect, little oxygen charging amount, lower energy consumption, little membrane pollution, and convenient change and maintenance, and is very suitable for the upgrading and reforming of the activated sludge aeration basin in the sewage treatment technology.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a rotary hollow fiber microporous membrane bubble-free oxygenation device and a method thereof. Background technique [0002] With socioeconomic development and population growth, water scarcity has become a global problem. Today, more than 2 billion people in 80 countries in the world are facing a crisis of fresh water resources, and more than 300 million people in 26 countries are living in a state of water shortage. The water shortage situation in my country is particularly severe. According to the 2005 "China Environmental Status Bulletin", my country's total water resources are 2.8 trillion cubic meters, ranking sixth in the world, but the per capita water resources are 2238.6 cubic meters, only A quarter of the world's per capita share has been listed by the United Nations as one of the 13 countries with poor water resources. Moreover, among the total wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/20
CPCY02W10/10
Inventor 徐又一李骏朱利平
Owner ZHEJIANG UNIV
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