Electrodes for Swimming Pool Water Disinfection

Swimming Pool Disinfection

Electro-chlorination technology has been introduced to this field in the past decade, it has proved to be a longer-term, more cost-effective solution and has better bactericidal effect in comparison with traditional Trichloroisocyanuric acid tablets or powder. Electrolysis systems are a particularly attractive alternatives for safe disinfection as by producing the disinfectant on-site, this systems removes any need to store and handle hazardous chemicals.

Municipal water will first be deionized (DI) to remove any metal cations present (e.g. Mg2+, Ca2+). DI water will then be stored to either dissolve sodium chloride, forming saturated brine, or for brine dilution. The brine solution is diluted to precisely 3% and then transferred to the electrolyzer (sodium hypochloride generator). A detailed electrochemical reactions for this process is laid out below:

Anode: 2Cl —– Cl2+2e
Cathode: 2H2O+2e—–2OH+H2
Solution Reaction: Cl2+2OH—–Cl+ClO+H2O

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