Oxidability of water is determined by the amount of oxygen required for complete dissolution of contained organic substances. After adding a strong oxidant into a product water, they determine the content of oxides in water or amount of spent oxidant. The oxidation of water is calculated according to the results..
Water contamination with silicic acid occurs in the process of its purification or during transportation. Evaluation of the content of silicic is made by means of the colorimetric method – transforming silicic acid to silicomolybdic acid and comparing the color intensity of the test solution with the standard.
Disinfected water is cleaned through the mechanical filters and the storage tank, and then by adding sodium metabisulfite removal of chloramine is made.
Then water is degassed and sent to the mixed bed filters containing ion exchange resins. Thus receiving the highest degree of purification. Cleanability of resins in the process of saturation with anions and cations is reduced, which leads to the periodic need to regenerate. Regeneration is carried out with weak solutions of acids (cation exchange resins) and alkali (anion exchange resin), and after it the resins column is rinsed with water.
Chemical water treatment is a complicated process that requires monitoring and control of technological parameters of the equipment. In addition, registration and storing of indicators of preparation process is required. Chemical treatment system is equipped with the following sensors with analog outputs: