Method and device for treating organic waste gas by combining photocatalysis and microorganisms and application thereof

An organic waste gas, photocatalytic reactor technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problem that the residence time is not long enough, the photocatalytic reactant cannot oxidize organic matter in the waste gas, and the photocatalytic efficiency Reduce and other problems to achieve the effect of reducing shielding and poisoning

Inactive Publication Date: 2009-09-16
深圳市中拓天达环保科技有限公司
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  • Abstract
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Problems solved by technology

However, in the process of treating industrial organic waste gas with a large flow rate, the photocatalytic reactant cannot effectively and completely oxidize the organic matter in the waste gas due to the insufficient residence time of the organic waste gas in the photocatalytic oxidation device.
In addition, as the time for photocatalyst to treat organic waste gas increases, the catalytic efficiency of photocatalyst will decrease with the increase of processing load.

Method used

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  • Method and device for treating organic waste gas by combining photocatalysis and microorganisms and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Equipment for the combined use of photocatalysis and microorganisms to treat organic waste gas: such as figure 1 As shown, the equipment for the photocatalytic and microbial combined method is passed through the gas collection hood 1, the valve 2, the bag filter 3, the flow-through photocatalytic reactor 6 (see ZL200420088717.8 for detailed structure) and the biological trickling filter tower 7. The pipelines are connected in sequence, wherein an anemometer 4 and a fan 5 are connected in sequence between the bag filter 3 and the flow-through photocatalytic reactor 6 . The photocatalyst fixed bed of described flow-through photocatalytic reactor 6 is 5 layers, and the size of fixed bed is 500 * 450mm, nano ZnO-SnO 2 The composite oxide photocatalyst is supported on the activated carbon fiber filaments. The biological trickling filter tower 7 is a 2L stainless steel tank with an inner diameter of 400 mm. The top is provided with a waste gas inlet, an air inlet control...

Embodiment 2

[0043] The difference between this embodiment and the equipment operated in embodiment 1 is that the photocatalyst of this embodiment is nano TiO 2 catalyst of light. The operating conditions of the equipment are the same as those in Example 1. In the initial stage of organic waste gas, the removal efficiency of total benzene series after photocatalysis is 89.9%, and the total treatment efficiency after microbial degradation is 98%. After one month of operation of the photocatalytic and microbial combined method, the removal efficiency of the total benzene series after photocatalysis is 89.1%, and the total treatment efficiency after microbial degradation is 99.9%.

Embodiment 3

[0045] The equipment for the photocatalytic and microbial combined method for treating organic waste gas and the preparation of the packing layer of the biological trickling filter tower are the same as in Example 1.

[0046] After the equipment of the photocatalysis and microorganism combination method was operated for one month, the test of the influence of the change of the flow rate on the photocatalysis and microorganism combination method equipment was carried out. Regulate the flow velocity of the organic waste gas entering the flow-through photocatalytic reactor 6 through the fan, and the flow velocity is 300m 3 / h, then, organic waste gas at 300m 3 / h enters the biological trickling filter tower 7, and the collected samples are analyzed. After photocatalysis, the removal efficiency of total benzene series is 75%, and after microbial degradation, the total treatment efficiency is 98.1%. Reduce the flow velocity of the organic waste gas into the flow-through photocatal...

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Abstract

The invention provides a method for treating organic waste gas by combining photocatalysis and microorganisms. Simultaneously, the invention also discloses a device of the method for treating the organic waste gas by combining the photocatalysis and the microorganisms and application thereof. The method for treating the organic waste gas by combining the photocatalysis and the microorganisms comprises the steps of physical dust removal, photocatalyst catalytic oxidation, microorganism purification, and the like, and can effectively eliminate total suspended particulate matters in the organic waste gas and volatile organic compounds in waste gas. The device of the method for treating the organic waste gas by combining the photocatalysis and the microorganisms is applied to treating industrial organic waste gas, and is particularly applicable to treating the organic waste gas in various industrial organic waste gas emission workshops.

Description

technical field [0001] The invention relates to a method for treating organic waste gas, more specifically, the invention relates to a photocatalytic and microbial combined method for treating organic waste gas. At the same time, the present invention also relates to equipment and applications for the above-mentioned photocatalytic and microbial combined method for treating organic waste gas. Background technique [0002] In recent years, photocatalytic technology to control the pollution of organic matter in organic waste gas has become a hot issue. Organic waste gas contains volatile organic compounds, such as triphenyl waste gas, etc., and semi-volatile organic compounds, such as polycyclic aromatic hydrocarbons, polybrominated diphenyl ethers, etc. Due to the low concentration of trace toxic organic pollutants in organic waste gas, it is difficult to fully contact and remove them in the subsequent process, which makes some control technologies more expensive and relativ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/84B01D53/86B01J23/14
CPCY02A50/20
Inventor 李桂英安太成周林成傅家谟盛国英
Owner 深圳市中拓天达环保科技有限公司
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