Deodorization methods have gone through a development process, and currently the commonly used deodorization methods are activated carbon adsorption, biological deodorization, activated oxygen technology and photocatalytic technology.
1) Activated carbon adsorption method
Activated carbon adsorption method is the use of activated carbon can adsorb the characteristics of odorous substances in the odor, to achieve the purpose of deodorization. In order to effectively deodorize, usually use a variety of different properties of activated carbon, set up in the adsorption tower adsorption of acidic substances of activated carbon, adsorption of alkaline substances of activated carbon and adsorption of neutral substances of activated carbon, odorous gases and a variety of activated carbon contact, discharged from the adsorption tower.
Activated carbon adsorption method is commonly used in low concentration of odor and deodorization device post-treatment.
2) biological deodorization method
In the past 30 years, biological deodorization technology has been widely used in Europe, and recently also in North America in deodorization. Biological deodorization mainly uses microorganisms to remove and oxidize the odor-causing ingredients in the gas, the gas flows through the biologically active filter media, the bacteria on the filter media will decompose the odor-causing substances, producing carbon dioxide and water gas.
Microbial parasites grow a thin layer of biofilm on the moist filter media, and when the odor-causing substances flow through the filter media, they are adsorbed and oxidized.
Advantages of biological deodorization:
Simple operation and management
Investment costs and operation and maintenance costs are lower than other deodorization processes
Wide range of applications, including: H2S, CS2, ammonia nitrogen, organic sulfides, etc.
3)Activated oxygen technology
Using high-frequency high-voltage electrostatic special pulse discharge ( Activated oxygen tube emits hundreds of billions of high-energy ions per second), generating high-density high-energy activated oxygen (between oxygen molecules and ozone, a transition state of oxygen), quickly collide with pollutant molecules, activate organic molecules, and directly destroy them; or high-energy activated oxygen activate oxygen molecules in the air to produce secondary activated oxygen, and organic molecules to occur in a series of chain reaction, and the use of energy generated by the reaction of their own Maintain the oxidation reaction, further oxidation of organic substances, generating carbon dioxide and water and other small molecules, and can be in a very short period of time to achieve high processing efficiency.
4)Photocatalytic technology
Photocatalytic technology is a new type of composite nano high-tech function of the technology, the basic principle is the use of photocatalytic nanoparticles in a certain wavelength of ultraviolet irradiation by the stimulation of the generation of electron-hole pairs, at the same time, in the oxygen and water, the hole decomposition of the water adsorbed on the surface of the catalyst to produce strong oxidation of the Hydroxyl radical (?OH), hydroxyl radical (?OH), the electron makes the oxygen around it to reduce into active ionic oxygen, so as to have a very strong oxidation-reduction effect, using its strong oxidizing, the photocatalytic nanoparticle surface of the various pollutants will be oxidized, oxidative decomposition of low concentrations of chemical pollutants in the air to make it harmless, so as to achieve the purpose of purifying the air.
Sewage deodorization equipment scope of application: sewage treatment plants, food processing plants, meat processing plants, slaughterhouses, poultry feedlots, paper mills, sewage treatment plants, waste transfer stations, manure treatment, and other organic and inorganic substances malodorous gas deodorization purification and treatment.