Desalination file (Article 3/3)
Interview with Christian Dubuc, the President of OSEMI Canada, who has developed a technical solution in collaboration with Rackam that is applicable to solar desalination.
Christian Dubuc, why get started in this sector with Rackam?
Rackam has been offering solutions based on concentrated solar power for several years now. Their technology portfolio meets all of its customers' needs in projects between 1 and 10 thermal MW. Some of the strengths of Rackam's solutions include their versatility and ability to adapt perfectly to the customer's needs. Its solar concentrator fields offer the perfect energy source for water treatment and desalination applications.
What would be the technical solution proposed?
Reverse osmosis (RO Reverse Osmosis) is a mature technology that can offer competitive prices in some applications such as MED distillation technology (Multi-effect distillation). Rackam offers a combined MED-RO technology that increases the performance of the RO significantly. This is an installation where electricity is produced from steam turbines in order to power the pumps of the RO. Residual heat from the turbine then powers the MED stages. Many other combinations are available, as Rackam's technologies are easy to hybridize in cogeneration with other types of power plants (biomass, natural gas, etc.). When the salinity of the water to be treated varies greatly, thermal solutions such as MSF and MED are the most effective.
What is the competitive advantage of using Rackam's solutions?
Rackam can easily optimize the thermodynamic cycles for each specific application, as it offers solar collectors among the cheapest on the market in the 80C to 325 C temperature range of. The thermal plants have the advantage of requiring little or no pre-treatment of inlet water. In addition, these plants are usually operated by the customer's existing staff without resorting to the specialists often necessary in RO operations.
Rackam's technologies can handle different volumes of water in many contexts and can even be configured for zero liquid discharge mode (ZLD, Zero Liquid Discharge) which allows great flexibility in the recovery of solid salts. These approaches are often useful in remote areas, as the disposal of waste water and other brines is highly regulated because of its threat to environmental degradation.
For more information:
Jacques-Alexandre Fortin, VP and Director of Marketing, Rackam, Canada