Biological treatment apparatus and method for wastewater containing volatile organic matter

Abstract

The invention relates to a device and a method for the biological processing of waste water containing volatile organic substances. The main part of the device comprises a liquid-phase biological fluidized bed and a gas-phase biological dripping filtration bed which are coupled, a porous flow guiding cylinder is arranged in the liquid-phase biological fluidized bed, a compound magnetic polyurethane foam carrier is filled in the porous flow guiding cylinder, and the bottom of the porous flow guiding cylinder is provided with a micropore aeration system to provide sufficient oxygen for biological oxidizing reaction. A compound magnetic polyurethane foam carrier is filled in the gas-phase biological dripping filtration bed to further degrade the volatile organic chemical compound generated in the biochemical process to thoroughly degrade the volatile organic substances. The device has high sewage processing efficiency, ensures the water quality of processed water reaches the national first-grade waste water discharge standard, and eliminates the atmosphere pollution by the volatile organic compound in the biochemical process. The device of the invention has simple structure, small occupied land, low investment, high waste water processing efficiency and low energy consumption, and is suitable for the processing and the recovery of the waste water containing volatile organic substances.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a biological treatment device and method for wastewater containing volatile organic compounds. Background technique [0002] The chemical and petrochemical industries discharge various so-called "point source" wastewater containing volatile organic compounds (Volatile Organic Compound, abbreviated as VOC). This type of wastewater contains volatile aromatic compounds (benzene, toluene, xylene and phenol, etc., treatment During the process, it is volatile and enters the atmosphere, which poses a potential hazard to the health of operators and the surrounding people in the process of wastewater treatment. Moreover, as people pay more and more attention to environmental pollution, the requirements for VOC emission standards are becoming more and more stringent. Develop new VOC-containing wastewater treatment processes and technologies. Currently, there are three main types of...

AI Technical Summary

Problems solved by technology

However, since the organic matter in the wastewater is easy to volatilize, part of the VOC escapes to the atmosphere with aeration during the aerobic treatment process, causing secondary pollution; the indirect method is to first separate the VOC in the wastewater by a certain method, and then send it to the biological Consumption and degradation in culture medium

This method also has the disadvantages of low biodegradation rate and high VOC concentration in the exhaust air, which causes secondary pollution of the atmosphere.

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