Case study: municipal chlorination at a water treatment plant

A Spanish municipal wastewater plant of 150,000 population equivalent decided in 2025 to replace its chlorination system based on injected commercial hypochlorite with on-site electrochemical generation.

Reasons for the change

• Commercial hypochlorite loses effectiveness during transport and storage.
• It requires tanker truck logistics.
• It generates packaging waste.

The solution

Three cells with SPARKFUZE™ CL-M anodes generate hypochlorite directly from dilute brine, on exact demand. Capacity: 50 kg Cl₂ equivalent/day.

Benefits

• Operating cost -34% in the first year.
• Elimination of transport (3 tankers/month).
• Electrode lifetime: contracted for 6 years with Jolt service.

The project has been replicated at two other plants in the same county.