Sodium Hypochlorite Generator for Disinfection / Water Treatment

What is a Sodium Hypochlorite Generator?

A sodium hypochlorite generator is a device that electrolyzes brine (NaCl solution) to produce sodium hypochlorite (NaClO) on-site. It is widely used in disinfection, water treatment, and environmental sanitation.

Working Principle

Electrochemical Reactions:

By passing a direct current through a diluted brine solution (typically 3–5%), the following reactions occur:

At the Anode (Oxidation):

$$2Cl^- → Cl_2 (gas) + 2e^-$$

At the Cathode (Reduction):

$$2H_2O + 2e^- → H_2 (gas) + 2OH^-$$

Sodium Hypochlorite Formation:

$$Cl_2 + 2OH^- → Cl^- + ClO^- + H_2O$$

The final product is sodium hypochlorite (NaClO), a powerful oxidizing disinfectant.

System Components

Anode Material Features

The anode typically uses a titanium substrate (e.g., GR1/TA1) coated with MMO (Mixed Metal Oxides) such as ruthenium and iridium oxides.

Key advantages:

• Excellent stability and corrosion resistance

• High electrocatalytic activity

• Supports polarity reversal to extend electrode lifespan

Advantages

Typical Applications