Method for starting air-liquid two-phase bacterium culture and reaction device for biologic treatment of waste gas

A bioreactor and biological treatment technology, applied in the direction of microorganism-based methods, specific-purpose bioreactor/fermenter, bioreactor/fermenter combination, etc., can solve the danger of long start-up time and difficult operation of bioreactors , Single domestication method and other problems, to achieve the effect of rich microbial species, good adaptability, efficient and stable removal

Inactive Publication Date: 2010-03-10
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0004] In order to solve the deficiencies in the prior art such as long start-up time of bioreactor, single strain, difficult and dangerous operation, and single domestication method, the present invention provides a gas-

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  • Method for starting air-liquid two-phase bacterium culture and reaction device for biologic treatment of waste gas

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Embodiment 1

[0025] Use biological trickling filter bed and biological filter bed series process to treat mixed waste gas from sewage treatment of a pharmaceutical factory. The waste gas contains H 2 S concentration is 300~500mg / m 3 , Containing VOCs (mainly toluene and dichloromethane, etc.) concentration is 250~2000mg / m 3 , Adopting this gas-liquid two-phase culture method and its special device has unique advantages. First, use the high-efficiency microbial preparations screened, cultivated and prepared and the activated sludge mixture of the sewage treatment aerobic biochemical tank of the pharmaceutical factory as bacterial strains, put the toluene and dichloromethane solution in the volatile liquid pollutant storage tank, and turn on The fan uses air to blow toluene and dichloromethane into the mixing tank, and at the same time the simulated H 2 S waste gas is passed into the mixing tank together, and after being mixed in the mixing tank, it is passed into the culture tank (1). The air...

Embodiment 2

[0029] The biological trickling filter bed process is used to treat the mixed waste gas of a chemical plant, which mainly contains benzene, toluene and xylene and other benzene compounds. 2 S and organic sulfur compounds such as methyl mercaptan, ethyl mercaptan, dimethyl disulfide, etc. The concentration of benzene compounds in the exhaust gas is 60~800mg / m 3 , H 2 S concentration is 5~40mg / m 3 , The concentration of organic sulfide is 11~53mg / m 3 , Adopt this gas-liquid two-phase bacteria culture device, use the activated sludge of the on-site sewage treatment aerobic biochemical tank as the bacteria, and after 8 days of culture method in the field as in Example 2, the pH of the mixed solution drops from 7.4 to 2.9 Then the pH of the culture tank was controlled between 3.8 and 4.2. After another 8 days of cultivation, the concentration of suspended solids in the culture tank increased significantly. Based on experience, it can be considered that the mixed bacterial solution has ...

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Abstract

The invention provides a method for starting an air-liquid two-phase bacterium culture and reaction device for the biologic treatment of waste gas as well as a special bacterium culture device used bythe bacterium culture method. The method comprises the following steps: taking a solution comprising simulated target waste gas or a mixture of the solution and gas as a nutrient source, carrying outdomesticated culture on strains for 5-20 days, spraying mixed bacterium liquid obtained by culture on a biologic filler in a biologic reactor directly and starting the biologic reactor treating the target waste gas quickly; and the special device comprises a bacterium culture tank, a simulated waste gas distribution system, an electric control device, a liquid feeding system of a liquid material,a liquid feeding system of nutritional liquid and a tail gas purification system. The method and the device thereof start the biologic reactor quickly, are effective and stable to remove contaminantsand save the running cost; liquid state substances with the same properties are directly used as a substrate, which can eliminate the difficulty and the unsafe factors of toxic and harmful gas in operation in the strain culture process; the varieties of microorganisms in the cultured mixed bacterium liquid are abundant, and the pertinence is strong; and the device has simple and flexible operation and strong adaptability.

Description

(1) Technical field [0001] The invention relates to a method for gas-liquid two-phase culture and reactor startup for biological treatment of waste gas, and a special culture device used for the culture method. (2) Background technology [0002] The biological treatment process of waste gas is essentially that the microorganisms attached to the biological filler media use the pollutants in the waste gas as carbon sources and energy sources under suitable environmental conditions to maintain their life activities and decompose them into CO 2 , H 2 O and SO 4 2- The process of such harmless small-molecule inorganic substances is a green environmental protection technology; at the same time, because of its simple process flow, easy operation, and low cost, it is especially suitable for treating low-concentration and large-volume waste gas, and it has attracted increasing attention. [0003] In the start-up phase of the waste gas biological treatment device, it is necessary to inoculate...

Claims

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Application Information

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IPC IPC(8): B01D53/84C12N1/20C12N1/14C12M1/00C12R1/01C12R1/07C12R1/64C12R1/38C12R1/32C12R1/785C12R1/80C12R1/845C12R1/66
CPCY02A50/20
Inventor 於建明沙昊雷黄奕平陈建孟
Owner ZHEJIANG UNIV OF TECH
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