Water Treatment - Ozone disinfection

Water Treatment - Ozone disinfection applications

     Currently in the world, purified water, natural water (mountain spring water, mineral water, groundwater, sewage treatment, etc. After filtration processes is made), has been widely used ozone disinfection; simultaneously oxidize a variety of impurities to purify water results. Ozone in water purification applications, the international conventional standards 0.4mg / L solubility values ​​for 4 minutes, or CT value of 1.6. Sewage retention time may be slightly longer dissolve 15-30 minutes following table for reference: air and water mixed connection Figure 1 (a small oxygen generator comes with oil-free compressor, 8T above water when air compressors and other ancillary oil cold and dry), the main role of ozone in water treatment the following areas:

1 oxidation of inorganic compounds

Ozone water can divalent iron into trivalent iron manganese oxide and ferric, the solubility of iron, manganese into a solid substance, in order to remove by sedimentation and filtration. The reaction is as follows:

       2Fe2 + + O3 +3 H2O → 2Fe (OH) 3

            3Mn2 + +203 → 3MnO2

      3Mn2 + +4 CN3 → 3MnO4

Conventional water treatment for removal of cyanide is not, and ozone is cyanide can be easily oxidized 100 times less toxic cyanate. The reaction is as follows:

CN-+ O3 → CNO-+ O3

3CN-+ O3 → 3CNO-

Ozone is a strong oxidant capable of ammonia oxidation to nitrate, ozone, water, hydrogen sulfide can be oxidized to sulfur and oxygen and water, thereby reducing the odor of water.

(2) organic matter oxidation

Many ozone capable of oxidizing organic compounds, such as proteins, amino acids, organic amines, chain unsaturated compound, an aromatic, lignin, Humus, at present, water treatment, as measured using CODC and BOD5 indicator of these organisms, ozone oxidation of these organisms in the process generates a series of intermediate products of the oxidation product will be higher, while, for a good dosing sufficient to degrade the ozone production to complete the oxidation of organic matter, can be transformed into inorganic substances. In particular, when water containing phenolic compounds, phenol can remove ozone generated by the stench. Next, as a surfactant (ABS, etc.), microorganism to break down, and ozone oxidation and decomposition of these substances is very easy.

3. Disinfection

Ozone is a very effective fungicide. The effect of various commonly used disinfectant according to the following:

   O3> CLO2> HOCL> OCL-> NHCL2> NH2CL

Ozone sterilization effect is good, fast, but also very effective in the eradication of the virus. The main determinant of ozone disinfection contact time and ozone production equipment, as well as by the PH value, temperature effects.

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