Bio-trickling filtration device and method for treating organic waste gases

Abstract

The invention discloses a bio-trickling filtration device for treating organic waste gases. The device comprises a bio-trickling filter, a base, a liquid circulating device and a gas distribution system, wherein the bio-trickling filter is provided with a gas outlet at the top and a gas inlet at the bottom and is filled with fillers; the base is arranged at the bottom of the bio-trickling filter; the liquid circulating device is connected with the top and bottom of the bio-trickling filter respectively; and the gas distribution system comprises an electromagnetic gas pump, waste gas preparation control branches and a buffer bottle, which are sequentially connected in series. The bio-trickling filtration device has the advantages of good stability, convenience in operation, reusability and the like. The invention also discloses a bio-trickling filtration method for treating organic waste gases. The method comprises the steps of pellicle preparation and organic waste gas treatment and has higher organic waste gas treatment efficiency. The method has the following advantages that by adding the nonionic surfactant Tween 60 to a circulation liquid, the organic pollutant removal efficiency is greatly improved; and the retention time of gases in the empty filter is shorter and the removal load and efficiency are high.

Description

technical field [0001] The invention relates to the field of organic waste gas treatment devices and methods, in particular to a biological trickling filter device for treating organic waste gas and a biological trickling filter method for treating organic waste gas. Background technique [0002] With the development of industry and the acceleration of the world's urbanization process, the world's air quality is generally threatened. In the system of air pollutants, gaseous pollutants account for more than 75% of the world's annual emissions of air pollutants. following SO 2 and NO X After the research upsurge, the pollution control of volatile organic compounds (Volatile Organic Compounds) has become another focus of attention of countries all over the world. [0003] Biological method has the advantages of good treatment effect, low investment and operating costs, mild reaction conditions (normal temperature, normal pressure), no secondary pollution, easy management and ...

AI Technical Summary

Problems solved by technology

Although this technical solution reduces the flow height of the nutrient solution, strengthens the gas-liquid mass transfer and biodegradability, and can handle a large amount of volatile organic waste gas, but the device takes a long time to process the waste gas, generally more than 7 days. Only when the removal rate is relatively ideal, the removal rate of organic waste gas is still not ideal when the treatment time is short

[0008] Due to the lipophilicity and hydrophobicity of most volatile organic compounds, the mass transfer process between gas and liquid is limited when the bio-trickling filtration method is used to treat low-concentration insoluble volatile organic compounds, which hinders the treatment efficiency of the method. , it is necessary to develop new devices and methods to further improve the mass transfer effect of organic matter, improve the treatment effect of biological trickling filtration, and provide a basis for industrial applications

Images