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| History Project Management Partnership Local Projects |
Antofagasta - Chile
History - Situated in the northern desert regions of Chile, the city of Antofagasta receives potable water through a three hundred and fifty kilometre pipeline from the Andes mountains.
Cascal carried out a complete refurbishment of the existing treatment plant, extensive upgrading of wastewater collection and treated water distribution systems. New construction works and reinforcement of existing sewers allowed interceptors to connect existing shoreline outfalls, transfer pumping stations and new collectors. Pumping stations were built in order to pump the city's sewage water to main collectors which then transport it to the pre-treatment plant. A new pre-treatment plant and a long sea outfall was built on site to process wastewater.
Project Management - Minimising the use of scarce water is a very crucial aspect of this project due to the barrenness of the area. Since the refurbishment of the plant high quality treated effluent is now re-used in industry and agriculture thereby conserving potable water. The sale of treated wastewater also partly finances the project.
A principal feature of the project is to provide environmental protection to beaches and coastal areas of the city of Antofagasta. The wastewater from the city was previously discharged directly onto the beaches causing major pollution which has now been eliminated by extensive upgrading of wastewater collection.
Partnership - Working in partnership with ESSAN, a State owned company responsible for city water services, the local Cascal company is marketing, educating people to encourage the use of recycled water. Recycling water decreases the demand for potable water and the need for more capital works to bring additional supply of water to Antofagasta.
A dedicated management and operational team of local staff has been built up. They have worked together with the support and expertise of staff from Cascal head office. Particular emphasis has been placed on emergency systems due to the original poor condition of the existing facilities and the environmental sensitivity of the coast.
Local Projects - Since the start-up in 1994 of the project in Antofagasta Cascal has completed a number of further projects in the region. These include the design, construction and operation of a sewage treatment plant for the Chilean Air force at the air base of Cerro Moreno. The sewage treatment plant re-uses its treated water to provide for the regions only local golf complex and country club, creating the dramatic contrast of a fertile golf course against the barrenness of the surrounding mountains.
In November 2001 a contract was signed for the supply of seventy litres per second of treated effluent for a period of twenty-two years to a copper smelter, owned by an important Canadian company located in the sector of La Negra, forty-five kilometres from Antofagasta. The total investment of this project reached the sum of six million United States dollars and encompassed the installation of both a pumped and a gravity pipeline system which total forty kilometres in length and have a capacity of ten mega litres per day. This will give us a surplus of five mega litres per day that will be sold to other industries that are also located in the sector of La Negra.