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Pressure type ozone reaction and microbubble biological aerated filter sewage deep processing device and method

A technology of biological aerated filter and ozone generating device, which is applied in the direction of oxidized water/sewage treatment, special compound water treatment, water/sewage multi-stage treatment, etc. It can solve the problems of low ozone reaction efficiency and low oxygen utilization rate, etc. Achieve the effect of improving oxygen utilization rate, shortening residence time and improving biodegradability

Active Publication Date: 2015-04-22
TSINGHUA UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on the problems existing in the above-mentioned prior art, aiming at the problems of low ozone reaction efficiency and low oxygen utilization rate in the existing combined process of ozone oxidation and biological aerated filter, the present invention provides a pressure type ozone reaction and biological aerated filter The combined advanced sewage treatment method can accelerate the oxidation rate of pollutants by ozone, and release oxygen in the biological aerated filter to form microbubbles to effectively use oxygen

Method used

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  • Pressure type ozone reaction and microbubble biological aerated filter sewage deep processing device and method
  • Pressure type ozone reaction and microbubble biological aerated filter sewage deep processing device and method

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Embodiment 1

[0037] Using the pressure type ozone reaction and micro-bubble aerated biological filter sewage advanced treatment device of the embodiment of the present invention to treat the effluent of a certain coal gasification sewage mixed sedimentation tank, the treatment capacity is 0.5m 3 / h, the temperature is 20°C, the outlet pressure of the dissolved air pump is 0.45MPa, the steam-water ratio is 10%, and the ozone concentration at the outlet of the ozone generator is 10%. The residence time of the pressure type ozone reactor is 5min, the residence time of the biological aerated filter is 3h, and the reflux ratio is 100%. The COD of the raw water is 142mg / L, the COD of the effluent treated by the pressure type ozone reactor is 108mg / L, and the COD of the effluent treated by the biological aerated filter is 79mg / L.

Embodiment 2

[0039] Use the pressure-type ozone reaction and micro-bubble aerated biological filter sewage advanced treatment device of the embodiment of the present invention to treat the effluent of the secondary sedimentation tank of a certain pharmaceutical factory, and the treatment capacity is 0.5m 3 / h, the temperature is 20°C, the outlet pressure of the dissolved air pump is 0.5MPa, the steam-water ratio is 12%, and the ozone concentration at the outlet of the ozone generator is 10%. The residence time of the pressure type ozone reactor is 8min, the residence time of the biological aerated filter is 4h, the reflux ratio is 150%, and the dosage of hydrogen peroxide is 10mg / L. The COD of the raw water is 156mg / L, the COD of the effluent treated by the pressure type ozone reactor is 109mg / L, and the COD of the effluent treated by the biological aerated filter is 76mg / L.

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Abstract

The invention discloses a pressure type ozone reaction and microbubble biological aerated filter sewage deep processing device and method, and belongs to the field of water processing. The device comprises an ozone generation device, a sewage inlet pipe, a gas dissolving device, a press type ozone reactor and a biological aerated filter, wherein both the oxygen source ozone generation device and the sewage inlet pipe are connected to a water inlet pipe of the pressure type ozone reactor through the gas dissolving device, a pressure-release water outlet pipe of the pressure type ozone reactor is connected to the bottom in the biological aerated filter, a dissolved gas release head is connected with the front end of a gas outlet pipe, and the dissolved gas release head is arranged in the biological aerated filter. The gas dissolving device, the pressure type ozone reactor and the dissolved gas release head used for releasing pressure are arranged, and therefore the ozone reaction is conducted in the high-pressure state, the reaction speed is increased, the reaction effect is good, pressure-reduction release can be achieved for high-pressure gas-dissolved water, oxygen is released in the form of microbubbles, the microbubble mass transfer speed is high, the oxygen utilization rate is increased, residual oxygen generated by the ozone generation is effectively used, and running expenses are reduced.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a device and method for advanced treatment of sewage in a pressure-type ozone reaction and micro-bubble aerated biological filter. Background technique [0002] With the increasingly stringent national environmental protection requirements, it is difficult for the commonly used sewage treatment processes to meet the discharge standards, so the advanced treatment of sewage is particularly important. Ozone oxidation technology is a feasible advanced treatment technology, but its high investment and operating costs limit its application in advanced sewage treatment. The investment in ozone oxidation technology mainly lies in its ozone generating equipment and ozone reactor, and its operating costs are mainly electricity costs and the cost of pure oxygen when pure oxygen is used. Due to the low solubility of ozone in water at normal temperature and pressure, the reaction rate between...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F1/78C02F3/02C02F9/00C02F2301/08C02F2305/023
Inventor 张景志邢林林刘金泉姜安平王凯
Owner TSINGHUA UNIV
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