In the process of treating sewage, sewage treatment facilities will produce some foul-smelling gases during the treatment process because the sewage contains a large amount of organic matter and microorganisms. These foul-smelling gases not only affect the surrounding environment and the quality of life of residents, but can also adversely affect the operation of sewage treatment facilities. Therefore, it is of great significance to study the control of odorous gas and treatment operation of sewage treatment facilities to improve the environmental impact and operation efficiency of sewage treatment facilities.
1. Foul-smelling gas in sewage treatment facilities**.
1.Biological decomposition process: In the process of sewage treatment, the organic matter in the sewage is decomposed under the action of microorganisms, producing some odorous gases, such as hydrogen sulfide (H2S), ammonia (NH3), methane (CH4), etc.
2.Chemical reaction process: In the process of sewage treatment, some substances in sewage may undergo chemical reactions to produce some odorous gases, such as sulfate-reducing bacteria reducing sulfate to produce hydrogen sulfide gas under anoxic conditions.
3.Sludge treatment process: In the sludge treatment process, the organic matter in the sludge is decomposed under the action of microorganisms, which also produces some odorous gases.
2. Control of odorous gas treatment and operation of sewage treatment facilities.
1.Biological filter method: Biological filter method is a method that uses microorganisms to adsorb and decompose odorous gases. In the biological filter, the odorous gas passes through the filler layer and is adsorbed and decomposed by the microorganisms on the filler, so as to achieve the purpose of purifying the gas.
2.Chemical oxidation: Chemical oxidation is a method of oxidizing and decomposing odorous gases using chemical oxidants. Commonly used chemical oxidants are ozone, hydrogen peroxide, etc.
3.Adsorption method: adsorption method is a method of using adsorbents to adsorb odorous gases. Commonly used adsorbents are activated carbon, zeolite, etc.
4.Membrane separation: Membrane separation is a method that uses membranes to separate odorous gases. By selecting the appropriate membrane material, the separation and purification of odorous gases can be achieved.
5.Ventilation control: In wastewater treatment facilities, with proper ventilation control, odorous gases can be discharged from the facility and their impact on the surrounding environment can be reduced.
6.Sludge treatment: In the process of sludge treatment, the generation of odorous gases can be reduced through reasonable treatment methods, such as aerobic digestion and anaerobic digestion.
In short, the research on the treatment and operation control of odor gas in sewage treatment facilities can effectively reduce the impact of odor gas on the surrounding environment and residents, and improve the operation efficiency of sewage treatment facilities.