Driking water treatment plant (Galicia, Spain)

This plant produces around 17000 m3 per day of potable water to meet the demand of 26.000 citizens. Surface water is pumped from a dam to the plant where is treated by the following system to guarantee water quality:

Pre-oxidation: organic matter content is effectively reduced in pre-oxidation reactors where ozone is injected.

Coagulation-flocculation: pH is adjusted and coagulation-flocculation agents are added to promote the destabilization of solids in a complete mixed reactor.

Clarification: solids are removed in lamella clarifiers.

Sand filters: polishing filtration system consists of 5 sand filters where fine particles remaining upon coagulation-flocculation are removed.

Chlorination: chlorine is used in the pre-oxidation stage when ozone is not injected, and in the disinfection process to avoid the presence of pathogens and ensure a remnant disinfectant concentration that guarantees a high quality at the consumption point.

Water storage: potable water is stored in concrete tanks to be distributed.

The innovative technology is able to generate a disinfectant from brine in situ, which can substitute the use of other chlorine compounds, making the disinfection process faster, safer and more reliable. This free-chemicals technology mitigates the environmental impact, reduce the energy consumption, and avoid the production of chlorine by-products.?