Processing method for malodorous gas of chemical area sewage plant

Abstract

The invention discloses a processing method for a malodorous gas of a chemical area sewage plant, and particularly relates to a chemical absorption-biological oxidation-absorption combined processing method. The malodorous gas enters a chemical washing tower, is subjected to absorption, oxidation and humidification in the washing tower, then enters a biological filter tower, contacts with microbe inoculated on filler surfaces, then enters an absorption device after being degraded by the microbe, and is discharged after being further purified by an adsorbent. An empty bed residence time of the gas in the biological tower is 10-120 s; and an empty bed residence time of the gas in the absorption device is 0.5-120 s. A nutrition liquid needed by the microbe in the biological filter tower is effluent of a secondary sedimentation tank of a sewage treatment plant or diluted raw water of a buffer and homogenization tank. The chemical absorption-biological oxidation-absorption combined processing method can remove hydrogen sulfide and volatile organic compounds from the malodorous gas of the chemical area sewage plant efficiently and realizes standard discharge. The method has the advantages of simple process flow, simple operations, low investment and operation cost, high processing efficiency and no secondary pollution.

Description

technical field [0001] The invention belongs to the field of waste gas treatment, and in particular relates to a chemical absorption-biodegradation-adsorption treatment method for malodorous gas from sewage plants in chemical industry areas. Background technique [0002] With the development of industrialization and the construction of the chemical industry zone, the sewage treatment plant is an indispensable unit of the chemical industry zone. The sewage received by the chemical zone sewage plant is a collection of various types of wastewater, which aggregates various toxic and harmful pollutants. Volatile chemical substances such as hydrogen sulfide and volatile organic compounds are easy to volatilize into the gas and cause foul smell. This foul smelling gas not only brings sensory discomfort, but also affects the human respiratory system, circulatory system, digestive system, endocrine system, mucous membrane, etc. cause harm, and have a serious impact on the surrounding...

AI Technical Summary

Problems solved by technology

The combustion method is a method of degrading flammable odorous substances through strong oxidation reactions, and is suitable for the treatment of high-concentration, small-volume flammable odorous substances. This method has high operation and maintenance costs and may generate secondary pollutants during the treatment.

Images