Total concept

Central purification systems and closed processes

Mercatus' total concept is a complete solution for the purification and recirculation of fluids such as cutting fluids and washwater as well as the handling and recycling of metal swarf.

Our concept for the finishing industry is a closed system for process fluids and swarf management.

In the Mercatus concept, cutting fluids are purified and recirculated, i.e. particles and swarf are continually filtered out of the cutting fluid system. Separated particles and swarf are drained and compressed into briquettes. The cutting fluid obtained through compression is returned to the cutting fluid system and the briquettes are sold for recycling. The concept also includes purification of different types of oily water, such as used washwater, in order to minimise the amount of fluid sent for destruction. Since the Mercatus concept uses no consumables, the only “waste” is pure filling water and recyclable briquettes.

The system has no limitation. It can be installed in all types of workshops, regardless of size or number of machines. Each solution is unique and the technology is customised to the specific needs and requirements of each customer. Investing in effective process fluid purification is profitable from many angles, particularly availability, which in turn increases effective production time.

In addition to the production gains, the investment generates a good yield as regards both internal and external marketing. There are also significant environmental gains through the improved work environment and more efficient use of natural resources.

The concept is based on our vast experience, own development, not being locked to special technology and well developed and goal-oriented collaboration with the foremost players in the industry. 

System description

The total concept is based on a combination of a central cutting fluid purification system, briquette pressing, membrane technology and evaporator technology. The entire system is fully automatic and can be in continuous operation.

Cutting fluid purification

This part of the system purifies cutting fluids, both water and oil based, eliminating particles and swarf down to approx. 10µm. The purification is so effective that the cutting fluids can be immediately returned to the process. No consumables are used. The only thing that leaves the machinery are the separated swarf and particles. There are automatically transported on to swarf management.

Swarf management

Swarf management is the part of the system that handles the swarf and particles from (1.) cutting fluid purification and from the finishing machinery. Here, swarf and particles can be centrifuged or (2.) compressed to dry, easy-to-manage briquettes. Swarf management is fully automatic. Swarf from other finishing machines can also be transported here by means of a (3.) vacuum unit with pipe system or the like. Naturally, swarf containers from machines that are not connected to the vacuum system can also be emptied directly into the swarf management system. The fluid that is drained is pumped back to cutting fluid purification via an oil separator, where leak oil is taken care of. The only thing that leaves the swarf management system are dry swarf or briquettes.

Destruction component

In the destruction component, there is a powerful concentration of the contaminants (not particles) found in the fluids. Depending on purification requirements, different purification techniques are used – (4.) membrane technology, (5.) vacuum evaporation or (6.) ion exchange technology. The purified water can, for example, be used for new washwater, as a water additive for cutting fluids or be released directly into the municipal sewage system. Only small amounts of concentrate must be sent for destruction.

Our total concept is profitable from many angles

  • Availability
  • Reduced wear of machines, pumps and tools
  • Less scrapping
  • Material recycling increases revenue
  • Reduced costs, increased service life of process fluid


Technical specification

Since the central recycling system is completely tailored to our customers' needs and desires, it is you who plays the greatest role in setting the specifications.

Cutting fluid purification

  • Degree of purification
    All wearing particles > 10 µm are filtered out
  • Media
    Oil and water-based cutting fluids with viscosity of up to 50 mm²/s

Swarf management

  • Residual moisture
    Down to 2 % – depending on swarf type
  • Material
    Steel, aluminium, brass, grinding filings, etc.

Destruction component

  • Volume reduction
    Up to 95 % – depending on medium
  • Media
    Washwater, consumed cutting fluids, dye water, etc.


1. Coolant cleaning and from the processing machines. 6. Ion exchanger technology. <br>The processed water can, for example, be used for new washwater, as additional water for coolants, <br>or alternatively be discharged directly into the municipal wastewater system. <br>Up to 95% of the process fluid can be recycled to the process. 4. Membranteknik 1. Coolant cleaning and from the processing machines. 3. Vaccuming suction installation. <br>Of course, containers of chips from machines that are not connected to the vaccuming<br> installation can also be emptied directly into the chip processing system.<br>The process fluid that is recovered is
pumped back for cleaning via an oil separator, <br>where leaked oil is collected, and can then be reused in the production process.<br>
The resultant product that leaves the chip processing system is comprised of dry chips or briquettes. 2. Here, the chips and swarf can either be centrifuged or compressed into dry and easily manageable briquettes.<br> The chip processing takes place fully automatically. <br>Chips from other processing machines can also be transported here. 4. Membrane technology 5. Vacuum evaporation