Salher relies on reverse osmosis drinking water treatment plants for seasonal demands

Compact reverse osmosis plants

Salher’s reverse osmosis plants, which are suitable for seasonal demands, have several working scenarios in which they can operate, depending on the instantaneous demand and, therefore, on the level of water detected in the treated water tank that supplies the municipality concerned. When the demand for water decreases due to lower consumption, the treated water production regime will also be reduced. This implies a change in the working conditions of the plant towards a scenario where several reverse osmosis membranes are isolated.

For these variables to work, it is essential to have made a detailed prior study of the demand and its seasonal regime, which will allow the engineers in charge of the plant design to select the equipment that best adapts to these records, both in terms of the design capacity of the pumps and the possible configurations of reverse osmosis and the lamination volumes of the tanks that come into play in the process.

Independent cleaning in stages and the ability to adapt to different demands depending on the work scenario are essential for the correct design of flushing and CIP membrane cleaning. A common feature of Salher’s treatment plants is the importance given to preventive maintenance, an essential factor in the case of reverse osmosis technology. Thus, the use of permeate water, the cleaning times, the chemicals used and the set-point values for the activation of the cleaning process are established in great detail and in a way that is specific to each plant.

A unique aspect of this process of adapting to seasonal demand is the definition of a hibernation protocol that allows the plant to operate in a ‘low demand’ mode for extended periods of time if necessary. This protocol consists in preserving the membranes that are not operating by soaking them in a preservative product. Likewise, their restoration back to full capacity operation is carefully designed to ensure that the process is carried out safely and without any interruption in the production of water and high quality water at any time.

Salher has extensive experience in designing and installing reverse osmosis plants, from which some significant advantages can be drawn:

• Detailed design and reliability.
• Maximum water quality for human consumption, irrigation and industrial uses.
• High retention of pollutants, reaching up to 99%.
• Homogeneity in the standardised values.
• Small and compact size.
• Easy installation and operation.
• Low maintenance cost.

Salher engineers adapt to the needs of each client to ensure a constant quality of treated water and reduced investment and operating costs (CAPEX and OPEX). Thanks to all this, today we can talk about Salher as a reference company in reverse osmosis systems.