1 Overview 

    Ozone has extremely strong oxidizability, and the reaction speed is fast. It can react instantaneously in low concentration. The sterilization ability is hundreds of times that of chlorine; it does not produce sludge and phenol odor, and no secondary pollution. Ozone is a very strong oxidant and can interact with many substances, such as reacting with many organic substances or functional groups, which can effectively kill various bacteria and viruses in water. Ozone can oxidize and degrade organic matter by reacting with various organic compounds to achieve the effect of removing color and odor in water. Ozone has a high disinfection efficiency, and has a strong killing ability against various viruses and bacteria. It can also remove odor, decolorize, and improve water quality. Ozone treatment technology is the key technology to control the environment and water pollution. The following mainly introduces Ozone generator for wastewater treatment.

2. Application of ozone generator for wastewater treatment

2.1 Disinfection for ozone generator oxidation

O3 is a bacteriolytic agent, used for sterilization and disinfection to achieve thorough, all microorganisms. The principle of ozone disinfection is to use O3 to destroy or dissolve the cell walls of microorganisms, quickly diffuse into the cell, oxidize and destroy the enzymes in the cell, and make the cell permeable distortion cause its dissolution and death. The disinfection effect of O3 is instantaneous and complete. Compared with traditional chlorine dioxide, O3 sterilization capacity is 600 to 3000 times. Ozone is the most effective disinfectant in the chemical disinfection method. In the secondary water treatment, the sterilization effect of ozone is 15 to 30 times faster than that of chlorine. It can replace chlorine as a disinfectant to prevent the formation of carcinogenic smelting dichlorane, etc. in the treated water, to avoid the need to increase the deterioration of the raw water The secondary pollution caused by the amount of chlorine, such as chlorophenol smell. In terms of virus inactivation, due to the high oxidation potential of ozone and its easy diffusion through microbial cell membranes, ozone can oxidize the organic matter of microbial cells or destroy the chain structure of organisms and cause cell death.Therefore, Ozone generator for wastewater treatment.ozone has a strong killing effect on viruses, spores, etc. The inactivation rate of bacteria during ozone disinfection is above 95%.

2.2 Ozone generator oxidation to remove impurities in water

When O3 is used to remove organic matter in water, it is used as a pre-oxidant, which can partially oxidize intermediate products with small molecular weight in organic matter. O3 oxidation reduces organic matter with a molecular weight greater than 105, but increases the amount of organic matter with a molecular weight between 1000 and 3000, which improves the biological activity in subsequent devices and facilitates the removal of organic matter. The widely used ozone process in China is: O3 (pretreatment) + bioactive filter. This process is more effective than ordinary activated carbon process for removing COD (removal rate up to 68%). O3 can also remove ammonia nitrogen in water: at high pH (9 ~ 10), it can induce ozone to produce strong oxidizing ability of OH· to oxidize ammonia nitrogen in wastewater. This method can be applied to the treatment of high ammonia nitrogen wastewater (garbage leachate). In the advanced treatment of sewage.Ozone generator for wastewater treatment

2.3 Ozone generator oxidizes and removes general chemicals in water

   The strong oxidation performance of ozone oxidizes Fe2+ and Mn2+ in the water to Fe3+ and Mn4+, and the effect of removing iron and manganese is stable. Ozone can oxidize and remove sulfide in sewage. The oxidation product is a series of oxo acid radicals, and finally the sulfate ozone reacts with cyanide to produce cyanate, and finally hydrolyzes to produce carbon dioxide and nitrogen dioxide. The removal rate of sulfide and cyanide by ozone can reach more than 98% when the conditions are appropriate.

2.4 Ozone generator oxidation treatment of excess sludge

O3 is added to the remaining sludge of the sewage treatment plant to bring it into contact with the organisms in the sludge, thereby destroying the cell membrane of the microorganisms, and making the sludge into biological sludge that is easily decomposed. Yasui H and Nakamura K et al. studied adding O3 to the remaining sludge. This technology improves the biodegradability of the sludge and can almost completely remove the remaining sludge without affecting the water quality of the treated water in the entire process. In addition, their experimental research found that non-continuous ozone oxidation can get better results than continuous dosing, and save a lot of ozone dosing. Under the premise of obtaining the same treatment effect, the discontinuous dosage is only about 30% of the continuous dosage. The use of ozone for the treatment of residual sludge is a new process that is effective and saves operating costs and has good prospects.Ozone generator for wastewater treatment

2.5 ozone generator for wastewater treatment

The colored and odor in sewage is a compound containing colored groups in which double bonds and single bonds are arranged alternately, generally caused by substances containing C=C or benzene rings and metal ions, etc. Ozone can interact with C=C to break Shuangjian to form ketones, aldehydes and acids, thereby removing water color, and at the same time oxidizing inorganic color-forming ions such as iron and manganese. It has been reported that when the dosage of ozone is 1mg/L, the color in water can be reduced from 20-50 degrees to about 10 degrees. Ozone can remove the odor caused by the metabolites of algae by destroying the metabolic process of algae.Ozone generator for wastewater treatment