Novel process for treating fermentation waste gas of amino acid by utilizing biofilter

Abstract

The invention discloses a novel process for treating fermentation waste gas of amino acid by utilizing a biofilter. Waste gas of zymotic fluid is subjected to Venturi dedusting and electrostatic dedusting, then fume containing extremely high COD and condensate are removed through a gas-liquid separator, and the condensate enters a sewage treatment system; and the fume enters the biofilter when the temperature is reduced to 35 DEG C through spraying, VOC in the fume is decomposed under the action of microorganisms, and gas which reaches the standard is exhausted from an exhaust funnel. The biofiltration and deodorization of the invention can treat certain specific malodorous gas, can also flexibly treat complicated mixed odor by converting biofiltration bed fillers and microbial strains, and have simple operation and no secondary pollution. The treatment process can greatly reduce the content of pollutants in the fume, is proved that the dehumidification rate and the removal rate of the volatile organic compounds can reach over 80 percent through a laboratory test, a pilot scale test and mass production, improve the living environment of surrounding residents, greatly reduce environment protection pressure, and has remarkable social benefit and environmental protection benefit.

Description

technical field [0001] The invention belongs to the technical field of amino acid fermentation waste gas treatment, and relates to a new process for treating amino acid fermentation waste gas by using a biological filter. Background technique [0002] In the amino acid fermentation industry, the pollution of waste liquid and gas is quite serious. At present, the relatively advanced technology in China is to add polymer flocculant to the high-concentration fermentation waste liquid produced in the amino acid production process to extract bacterial protein, and then use a four-effect evaporator to Evaporation and concentration are carried out in a vacuum state, and the concentrated solution is dried and granulated by a spray granulation dryer. During the spray drying process, a large amount of water evaporates under the action of high-temperature hot air to form odorous water vapor. In response to this situation, dust removal and deodorization equipment is installed in the pr...

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Problems solved by technology

However, there are problems after treatment: this set of equipment uses fermented wastewater for spray cooling in the Venturi spray process, the spray volume is large, the water temperature is high, and a large amount of water vapor is formed in the second time; although the electrostatic dust removal equipment is used effectively The solid particles in the exhaust flue gas are removed, but the solid particles in the outlet flue gas are still relatively high (428.0mg / m 3 ); water vapor encases the solid particles that have not been completely removed and the trace organic matter in the concentrated liquid that mainly has a burnt smell and is discharged through the chimney together

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