EFFECTIVE SOLUTIONS To

 TOUGH CHALLENGES

Sustainable water treatment

In Sweden, we have the world's strictest environmental regulations when it comes to emissions of chemicals and heavy metals. When washing heavy vehicles, dirt, particles and environmentally hazardous substances that come with the wash water are removed.

This polluted water must be taken care of and be treated.


Westmatic has long experience in water treatment and with our solution we recycle up to 85% of the

 wash water and clean the remaining water before it is released into the municipal sewer.


Our solutions also include options for rainwater recycling. It is of course better for both the environment and the economy to use rainwater instead of fresh water to wash vehicles.

Maximum level of purification and

reuse of wash water

– completely without chemicals

Water recycling

The wash water used in the wash bays flows into a

chamber where an initial sedimentation takes place.

It is then led on to a ground tank system where it first passes a coarse sludge tank and then on to a fine sludge tank.


From the fine sludge tank, the water is pumped up to a hydrocyclone where the particles are separated from the water, and then  the particle-cleaned water is treated with ozone to eliminate bad odors, it is led further to a buffer tank in the tech room. The separated particles are led to a disposal tank in the ground. The particle-cleaned water in the buffer tank is then used in the wash cycle again.


Up to 85% of the wash water is reused, which provides great benefits both for the environment and the economy.

Water purification

A certain part of the washing water passes through the fine sludge tank and is passed on through a coalescence filter to the oil separator where it is further cleaned before it goes on to a pump chamber. From the pump chamber, the water is pumped to the tech room, where Westmatic's water purification system, RENAREN, takes over.


RENAREN uses electroflocculation, which means that the water to be purified passes between an anode and a cathode plate. In the process, charged small bubbles are generated which bind the pollutants and then float to the surface in a tank. The bubbles collect as a flock on the surface of the water, which is scraped off and led to landfill chambers in the ground. The purified water can then be pumped out to the drain.

Adaptable for water purification needs

The capacity can be completely adapted to your needs and the size of the facility. RENAREN is used today in many different applications within the process industry, everything from paint shops to heavy manufacturing industry. It fulfills an important task wherever effective purification of, for example, oil-mixed water is required.


RENAREN system can be installed in both new and already commissioned vehicle washes for everything from small car washes to bus, truck and train washes.


In maritime RENAREN can be advantageously used to clean storm water. As RENAREN is so compact, it can also be installed in tight spaces. 

RENAREN is DNV certified for ship installations.


Eight good reasons to use RENAREN for your water purification needs

  • Environmentally friendly - very high degree of purification without the addition of chemicals
  • Cost-effective – no environmental fees and is basically maintenance-free
  • Compact - small foot print
  • Proven – has been used in the process industry for many years
  • Future-proof – can be easily adapted to future environmental requirements
  • Flexible – can be used in many different environments
  • Swedish – developed and produced in Sweden
  • Service – has a wide service network with specially trained technicians

Rainwater recycling

Recycling the wash water reduces fresh water consumption by up to 85%. By also harvesting rainwater and using this as rinse water in the washing system, the consumption of fresh water can be further reduced, which is of course positive both for the environment and the economy.


The rainwater is led from selected collection surfaces (normally from roof surfaces) to a ground tank where it is stored. As the rainwater contains organic matter and impurities such as excrement from birds, it must be treated to avoid possible bacterial growth and bad odours. This is done by adding ozone to the rainwater and it can then be used as rinsing water.


The treated rinse water is pumped via a submersible pump from the ground tank up to the tech room.

From there, the water is then pumped via a rinse water pump to the wash system's rinse arc and used in the completed rinse step to rinse off the washed vehicle. Should the rainwater not be enough, for example during a period with little rainfall, fresh water is automatically added to the ground tank to avoid possible dry running.


The combination of water and rainwater recycling  reduces fresh water consumption to a minimal level, which is completely in line with our sustainability work

Westmatic Wash Liquids

Our own detergents are specially developed for your Westmatic system. Environmentally friendly, gentle and extremely effective.

You will find all our products in our Webshop.

Westmatic Shop

Clean & Green

Westmatic wash systems are developed and engineered to exceed some of the world's most stringent regulations for the use of water and power resources. Made in Sweden for markets with extreme climates - from hot to cold. Westmatic's system uses less water, chemicals and electricity compared to competing systems. Our nozzles are configured to use up to 50% less water while our highly efficient motors require less electricity.

Read more here
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