Debugging

Purification is cleaning wastewater from materials, biological residues, metals and chemicals. Treating wastewater from domestic and industrial uses treats and removes pollutants before it is returned to a receiving watercourse or reused for industrial or irrigation purposes.

Precisely, wastewater treatment consists of the removal of suspended solids and materials in wastewater, the removal of dissolved chemical and biological pollutants in wastewater and eventually, the removal of nutrients such as nitrogen and/or phosphorus that cause water eutrophication, leading to uncontrolled proliferation of phytoplanktonic algae.

Reclaim wastewater and reintroduce it back into the cycle for reuse.

This sanitation and purification treatment is carried out in several stages in wastewater treatment plants. In the water line, they stand out:

• Pre-treatment, by which coarse materials and solids present in the water are removed by screening and sieving. This separates these materials and prevents solids and large objects from damaging downstream treatment equipment.
• Primary treatment for removing all settleable solids and floating materials through a sedimentation process in which the wastewater is left to settle, allowing the solids to settle to the bottom of the tank and the floating materials to be removed from the surface. They may be complemented by chemical treatments for extracting a particular pollutant.
• Secondary treatment,which allows the removal of organic pollutants and dissolved nutrients by using aerobic or anaerobic bacteria in biological processes such as oxidation and digestion through physicochemical processes such as coagulation, flocculation and filtration. Another process used is Disinfection,, the final step, a procedure that eliminates pathogenic micro-organisms through exposure to disinfectant chemicals such as chlorine, ozone or UV light.

Among the actions carried out, it is worth highlighting the work at the Peñón del Cuervo WWTP and the Rincón de la Victoria WWTP to direct regenerated water to agricultural estates. Both connections increase farm water resources and add up to 9.1 cubic hectometres of reclaimed water for irrigation in La Axarquía.

As well as the design and construction of the Malaga Norte WWTP, the largest wastewater treatment plant in Malaga, and the Don Benito y Villafranca, Tajuña, Estepona and Ecija WWTPs, among many others. From the point of view of the maintenance and operation of WWTPs, for example, the El Copero WWTP, the largest in Seville, and the Ranilla WWTP in the same province have been preserved.