ImWATER manufactures and delivers a well water desalination plant for irrigation in irrigation communities in the South of Spain and the Canary Islands, with situations of water stress and affected by Climate Change.

There is an increasing need for fresh and drinking water that cannot be covered by natural sources due to the presence of contaminants or high salinity, making it necessary to treat the water for its final use.

For one of these cases, ImWATER has recently completed the manufacture of a new brackish water desalination system, from wells, using reverse osmosis technology for the production of 100 m3/day.

A customised system

This equipment is the result of the solution developed by ImWATER and adapted to the needs of the client (characteristics of the feed water, availability of water, available installation space, desired end use…) combining in a single frame almost all the equipment involved in the process.

Stages included:

  • Pre-treatment: the raw water passes through a zeolite bed filter, which removes turbidity and particles. Once filtered, it is chemically conditioned by dosing anti-scalant that favours a correct and long-lasting operation.
  • Reverse Osmosis (RO) system: following the pipeline, the water passes through a microfiltration that protects the RO membranes and then passes through the high-pressure pump that pressurises the feed to the pressure pipe, where reverse osmosis takes place.

After this, the permeate water leaves the plant to the destination chosen by the customer with continuous monitoring of the conductivity, while the reject water is divided into a part that will be recirculated to the system and another part that is discarded.

  • Flushing/CIP system: on the same frame, there is a dedicated tank and pump for automatic displacement with permeate water, which also allows CIP to be carried out when the system requires it by means of an incorporated set of pipes.

Compact design

The only element installed outside the frame is the bed filter, for final positioning according to customer requirements.

This drastically reduces the installation work required on site and the customer receives a highly reliable product that has been tried and tested in our facilities.

In addition, its small dimensions allow for convenient and discreet positioning.

Equipment distribution in the rack

  • High efficiency and water recovery

This system has been designed with the end use in mind, knowing that the customer may have varying water requirements that can be easily managed through the frequency converter interface of the high pressure pump installed in the control panel door.

In addition, the design is focused on achieving high recovery that maximises the raw water intake and generates as little waste in the form of reject as possible. All in all, the plant is capable of obtaining 80% of the raw water fed to it in the form of product.

  • Automated control and minimum operating requirements

The plant’s electrical panel includes a PLC that automates process operations, such as the backwashing of the bed filter, shutdowns due to pressure emergencies or lack of chemical levels, among others, or flushing with permeate water.

In this way, the plant is practically autonomous and the need for operator intervention is minimal, making this a reliable and safe system.

Instrumentation included

Given the intended end use of the system, the instrumentation included is adapted to the plant’s operations including simple pressure and flow measurements through manometers and rotameters, respectively, for on-site consultation in the plant. Pressure switches are also included to verify that the process pressures are in the appropriate ranges, as well as automatic valves that enable many of the automation processes. Finally, the conductivity measurement in the permeate outlet line allows the quality of the water obtained to be consulted and verified.