Seawater Reverse Osmosis Desalination Plant

Enapac: It is a response to climate change and desertification in the Atacama region.

It consists of the construction of a desalination plant to achieve a reliable water supply of 1,750 liters per second (6,300 m³/h or 151,200 m³/d).

The plant is a seawater reverse osmosis (SWRO) facility with a nominal capacity of 1,750 liters per second, to be built in the province of Caldera, Atacama region, near Copiapó. It is designed to be expandable up to 2,610 liters per second.

It includes a water intake located 300 meters offshore (due to environmental and seabed characteristics), using six bridge-mounted column pumps.

The project also includes a booster pumping station to transport water to the water treatment plant.

The brine outfall point is designed to extend about 270 meters from the coastline with diffusers to facilitate dispersion in the marine currents.

Some technical details:

  • The SWRO intake will be built for full capacity.
  • The SWRO plant area and earthworks will be designed for full capacity.
  • The pumping equipment will be installed only for the first stage.
  • SWRO plant with a nominal capacity of 1,700 liters per second, 6,120 m³/hr (103,700 m³/day) to be built in two stages.
  • Process units: Intake, coagulation-flocculation, DAF, UF, SWRO remineralization.
  • Discharge of brine and wastewater will be done through submarine pipelines at a depth of 23 meters. Online pH monitoring and control will be implemented.