Waste Gas Treatment by Combined Biological Process in an Acrylic Acid (Ester) Wastewater Treatment Station

biological filtration; acrylic acid(ester); waste gas treatment; oxidation spraying

As an important chemical raw material, the annual production of acrylic acid (ester) is extremely large, and the amount of exhaust gas emitted from its production process shall not be underestimated. Acrylic acid (ester) production wastewater is an important waste gas emission source. Taking the waste gas generated by the volatilization of acrylic acid production wastewater treatment station as the object, the combined process of biological filtration, oxidation spraying, and activated carbon adsorption (in emergency) was designed and selected. After treatment, the emission concentration of ammonia, hydrogen sulfide, benzene, toluene, acrylic acid, acrolein, formaldehyde, non-methane total hydrocarbons and odor were reduced to none detected, none detected, 2.35 mg/m³, 9.24 mg/m³, 0.98 mg/m³, 1.12 mg/m³, 0.74 mg/m³, 12.2 mg/m³, and 295, respectively. The exhaust gas met the requirements of standards including Emission Standards for Odor Pollutants (DB 31/1025-2016)in Shanghai, Emission Standard of Pollutants for Petroleum Chemistry Industry (GB 31571-2015), Integrate Emission Standards of Air Pollutants (DB 31/933-2015) in Shanghai, Emission Standard of Air Pollutants for Urban Wastewater Treatment Plant(DB 31/982-2016)in Shanghai, and etc. The operation cost of the combined process was 0.003 6 yuan/m³. With low operation cost and high treatment efficiency, the process could provide reference for the design and implementation of waste gas treatment project in acrylic acid (ester) production wastewater station.