Sodium hypochlorite preparation plants

In the initial stages of water treatment (clarification, discoloration, coagulation, sedimentation and filtration) it is possible to remove up to 98% of microorganisms. The rest of them remain active. This is why it is also important to carry out disinfection while purifying surface waters.

Disinfection of drinking water at water treatment plants is possible with the use of sodium hypochlorite, which is prepared locally from sodium salt or saline water in electrolysis containing at least 20 mg/ l of chloride.

Sodium hypochlorite installation and dosing:

• saturator;
• water softener;
• electrolysis;
• tanks for storage of saturated sodium chloride and sodium hypochlorite;
• exhaust ventilation to remove hydrogen;
• dosing pumps of the finished product;
• flow measurement and control devices for sodium hypochlorite dosing.

Operation:

The sodium chloride solution prepared in the saturator is fed to the electrolysis stage. As a result of an electrochemical process, a solution containing sodium hypochlorite is formed and hydrogen is released on the cathode. From the electrolysis the product enters the degassing column, where the hydrogen-air mixture is diluted to an explosion-proof state and the mixture is then airstripped.

Advantages of sodium hypochlorite preparation and dosing:

• the use of hypochlorite for disinfection is fully follows safety standards and requires fewer precautions on than disinfection with chlorine gas;
• simple and reliable system components provide durability and require little maintenance costs;
• this equipment can be easily connected to the dispatch system of an enterprise;
• the equipment can be fully automated and does not require the constant presence of staff.

All sodium hypochlorite preparation equipment is produced based of individual project and delivered on-key.