• St. Almiral, 10 P.Ind. La Palma 30593 Cartagena (Murcia-Spain)

Micro and Ultrafiltration

We have the technology to design and manufacture micro and ultra filtration systems that allow filtration of particles in the 0.02 to 10 micra range.

Read More


We manufacture facilities for desalination of salty water and seawater to be used in irrigation, human consumption, demineralised water and ultrapure water for labs.

Read More


We design nanofiltration equipment using membranes for separating molecules with high molecular weight, divalent ions and suspended solids.

Read More


Plants designed to reach places where it is not possible to install equipment inside a building, integrating all components.

Read More

Pilot Plants

We manufacture small scale plants to check different processes and thereby obtain results that can be extrapolated to a greater scale.

Read More

Water Treatments

Our work can be seen at all levels, from consultancy to building turnkey facilities.

Read More


Our staff is made up of engineers, specialist technicians and workshop and maintenance staff, with experience in different fields, tackling areas from water chemistry to industrial automation. Their knowledge is combined to offer high quality, solid products that are easy to handle.

Read More

HIDROTEC, innovative water treatment technology and desalination process specialists

Spain is a worldwide leader in water engineering, more specifically in desalination processes. It is not by chance that the Region of Murcia, one of the most important agricultural areas in Europe, used to having to make the most of the very last drop of water, has developed membrane technology to the highest level.

Hidrotec, a company located in La Palma Industrial Estate in Cartagena, takes this technology all around the world, manufacturing equipment designed to suit many businesses.

Working on this market for over 20 years, Hidrotec designs and builds equipment for water desalination from salty wells and from the sea, using reverse osmosis technology.

However, in addition to reverse osmosis and as a result of several lines of research carried out by company technicians, less well known technologies have been developed such as removing dissolved oxygen or CO2 from water by means of membrane contactors, separating substances with different molecular weight using nanofiltration or using ultrafiltration as a treatment or pre-treatment for a range of other processes.

Consequently, Hidrotec works as technological support for the industry inside and outside the Region of Murcia in many cases, openly and actively involved in developing equipment required to optimise productive processes, or improve certain products, thereby making companies in the area more competitive.

One example is equipment to separate and concentrate mono and disaccharides (sugars), milk proteins, alcohol, fruit juices or any other process that requires molecular level separation using membrane technology.

In the same way, Hidrotec builds water treatment plants for the chemical industry, plants producing demineralised water for the food industry or ultrapure with electro-deionising systems for labs, research centres or the pharmaceutical industry, manufacturing under the strict European pharmacopoeia rules.

A different problem issue has been encountered in areas of Latin America such as Chile or Peru where work is already underway on technologies to remove pollutants that affect communities via the water, as a consequence of copious mining, applying selective ion elimination systems for boron or arsenic or in combination with others to eliminate chromium or cadmium.

They are also taking their technology to African countries such as Morocco, Equatorial Guinea or Senegal, working with the dairy or drinks industry, and making river water drinkable to supply cities in Angola using ultrafiltration systems, minimising the use of chemical products. Leachate treatment plants in Portugal or high quantity water supply to hotels around the world.

Read More

Hidrotec supports optimising facilities

Hidrotec Tratamiento de Aguas, a Cartagena company working on desalination and making salty water and seawater drinkable, has built many facilities over the years. With over 25 years experience in the sector, the company runs the oldest desalination plants in the area that in most cases are still using their original membranes, meaning that these facilities have been enormously profitable and the percentage of the cost per cubic metre of water to pay off the membranes is very low.

This is clearly achieved thanks to two fundamental factors, firstly the quality of the physical pre-treatment (sand filters and microfilters) and secondly, and most importantly, the quality of the chemical product, fundamentally used to inhibit salt precipitation. The phosphoric acid content of this product also plays a fundamental role, acting as an antioxidant and protecting the polyamide. It is similar to good cholesterol that clears out the bad version from your arteries where in this case, the bad part is the phosphoric acid that is generated in a meticulous process to produce the actual precipitation inhibitor.

Due to the spread of this type of product, not always from a recommended source, membranes are subject to gradual ageing that might be accelerated, or not, by a variety of factors. To continue comparing it to cholesterol, it is as if we were eating pastries made with trans-fats everyday rather than olive oil that might have helped us clear out these “harmful” fats. We’d be in a bad way but in both cases, the damage is not done overnight but rather more slowly and inexorably. It is fair to say our case is easier to tackle than cleaning up the human body, as it can be resolved with new membranes at the consequent economic cost for the facility owner.

This information is endorsed by the study that interested parties, including membrane and chemical product manufacturers, carry out on the precipitation inhibitors used in the area, coming to these interesting conclusions: primary material is lacking and contains impurities and deficient final production leading to undesired compounds.

It all adds up because in the end, between shortening the useful life of membranes and in many cases, the need or sometimes the oversight of excessive dispensing, money slips through our fingers but as this happens little by little, we do not give it a second thought.
At Hidrotec, we are delighted to be able to offer you advice on optimising your facilities without demanding any type of commitment, thereby offering you the resources required to make sure you are getting the most out of your equipment.

Read More