Chlorination plant

Chlorination Systems

Chlorination Systems

Hitachi Zosen started selling seawater electrolyzers in 1967 and is now a top manufacturer with an outstanding track record in Japan and overseas. They mainly handle equipment for power plants and seawater desalination.

Learn More

They have made more than 300 deliveries (as of February 2021) in Japan and overseas. Many nuclear power plants in Japan have adopted their products, where safety and reliability are paramount.
An electrolyzer (electro-chlorination equipment) prevents the adhesion of marine organisms, such as microorganisms and shellfish, by directly electrolyzing seawater or salt water to produce Sodium Hypochlorite.
Electrolyzers are installed and used in power plants, other plants in coastal industrial areas, and ships. They also improve water quality, maintain transparency, and sterilise aquarium waterworks.


By passing a direct current through seawater or salt water, the electrolyzer generates Chlorine (Cl2) on the anode surface and Caustic Soda (NaOH) on the cathode surface. The Chlorine and Caustic Soda react to produce Sodium Hypochlorite (NaClO). Also, Hydrogen, a by-product generated on the cathode surface, is separated by a device such as a deaeration cylinder and then safely released into the atmosphere.

Hitachi Zosen offers three types of seawater electrolyzers: a direct delivery system, a receiver tank system, and a circulation system.

Product Enquiry

Liyakat Khan

Quick Response Team