Aware of the problem of eliminating sludge from water treatment and after wide experience in this field, Inima has carried out numerous actions in this area.

• Anaerobic digestion.
• Heat based aerobic digestion (ATAD).
• Heat drying of sludge.

Especially:

Heat based aerobic sludge digestion plant (ATAD) for digesting and sanitising sludge in the Tudela waste water treatment station for an equivalent population of 92,000.

Heat drying of sludge in the Butarque (Madrid) waste water treatment station for an equivalent population of 1,700,000.

Inima also builds and has 15-year concessions for some of the largest installations for nutrient elimination by biological treatment in Spain, the waste water treatment plants in Besós and Montcada in the metropolitan area of Barcelona for a population of 1,680,000.