The contract, which was awarded by the Arequipa water services company Sedapar, is worth about €17.4m (£15.2m), between construction and operation.
The new plant, which will require 130 staff, will help to solve the sanitation and environmental problems of the northern part of the Arequipa metropolitan area - Peru's second most-populated city - and lead to the decontamination of the Chili River. It will use a biological treatment for processing wastewater and is expected to bring down the contamination load by up to 90%. This process will lead to water reuse in local farms.
Acciona Agua expects to have the necessary infrastructure built in a space of 22 months and will take care of operation and maintenance for a period of three years. The project includes auxiliary sanitation works, such as a collector with an 800m-diameter intake, construction of a wastewater treatment plant for an average flow of 34,800m3 a day and protection components for the canal. The plant foresees an average flow of 403litres/sec, rising to a daily maximum of 500litres/day by 2036.
The Arequipa plant comes as Acciona Agua's third contract in Peru. It follows a desalination plant built in 2002 and a joint venture with Peru’s Graña Montero, appointed late last year to design, finance, operate and maintain the €280m La Chira wastewater treatment plant.