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H2O. Leaders in Zero Liquid Discharge.

VACUDEST in vehicle and transport cleaning.

Means of transport have to be one thing above all else: Safe. That’s why the vehicles regularly undergo strict quality checks. They are thoroughly maintained, serviced and repaired, and this of course also includes careful cleaning. Effluent is produced which, due to the high degree of contamination, cannot be discharged into the public sewer system. It contains oil, grease, detergent and other impurities. This effluent is very expensive to dispose of. Internal treatment of such wastewater is a cost-effective alternative to disposal.

The VACUDEST vacuum distillation system treats the wastewater resulting from your processes with such a high quality that it can be reused for parts and vehicle cleaning. This is made possible by our patented Clearcat technology, which produces crystal-clear, oil-free distillate which itself reliably upholds the strictest guidelines. All in one single process step, doing away with the need for laborious distillate re-treatment.

Take advantage of zero liquid discharge production with VACUDEST: You’ll save precious fresh water, valuable production space, and cash!

Read here how satisfied our French customer RATP, operator of the Paris metro, is when treating the wastewater resulting from vehicle cleaning.

Metro and municipal railway of Paris VACUDEST provides clean water for train maintenance

Every year, more than 3 billion passengers are travelling in and around Paris with trains and buses from RATP – the “Régine Autonome des Transport Parisiens”. This major public transport company in Paris operates divisions like the Paris Metro System, parts of the RER (trains of the Réseau express régional d'Île de France), a huge bus system and several tram lines.

All the trains and busses have to be maintained in certain time intervals. The technical revision of the trains is organised in different workshops in and around Paris. In the maintenance process, a lot of washing waters (i.e. from parts cleaning) and emulsions (cutting and drilling emulsions) are produced. Because of environmental laws, these waters may not be disposed of into the public sewer system, but have to be destructed by specialised companies, creating high cost.

Due RATP’s environmental policy, the transport operator tried to find an environment friendly, cost effective, simple and reliable treatment system for the emulsions and washing waters. After careful analyses of process based on the H2O VACUDEST different technologies, RATP decided for a process based on the H2O VACUDEST - technology. This process allows zero liquid discharge since the distillate can be recycled. Thus fresh water resources can be saved and fresh water treatment cost reduced to a minimum.


Treatment concept with VACUDEST Clearcat vacuum distillation system

The different types of polluted process waters are collected in a 10 m³ storage tank prior to being fed into the VACUDEST. This size of the tank gives the possibility to compensate fluctuating process water flows because of unsteady maintenance activities in the work shop. After separation of floating oils by a skimmer, the emulsion is fed into VACUDEST unit. This vacuum distillation system produces purified process water, which can be either reused in the washing process or disposed of into the public sewer.

The latest project in Paris includes a VACUDEST M 1,500 Clearcat-System for treatment of up to 1,500 m³ of wastewater per year. Because of the patented Clearcat technology, the treatment of water containing hydrocarbons is much more efficient compared to conventional evaporator combined with residual oil absorbers for distillate post treatment. The innovative Clearcat technology produces crystal clear distillate, virtually free of oils, heavy metals and salts without any post treatment. Thus space required, investment and operation cost are lower.

Activepowerclean (APC): A milestone to reduce energy consumption

The effect that the power input into a vacuum distillation system is increasing at high evaporation rates due to scaling on the inner heat exchanger surface. To reduce this effect, H2O GmbH developed the Activepowerclean-technology. The heat exchanger of the vacuum distillation system is cleaned during operation continuously by means of small ceramic grinding balls of VACUDEST.


Activepowerclean heat exchanger.


VACUDEST M 1,500 Clearcat.

Since 1998, the approved APC system is available for middle range and large VACUDEST systems. In the latest VACUDEST series, the Activepowerclean heat exchanger was generously enlarged and fluid dynamic parameters have been improved, thus chemical cleaning is reduced and energy consumption is reduced by 15 %. In addition the new Activepowerclean grinding balls act like boiling stones and thus reduce foam formation drastically.

The VACUDEST Vacutouch control panel

In autumn 2016 the innovative control system Vacutouch was enhanced by H2O. The PLC control system guarantees uncomplicated handling via process visualisation and user guidance. Due to features like Profibus and Ethernet connection, the VACUDEST can be integrated fleibily in superordinated control systems or can be operated via remote access.

die-vacutouch-technologie-erleichtert-die-maschinensteuerung-in-der-transportmittelreinigung Screenshot of Vacutouch control system.

Project management

In a team with engineers from H2O and RATP the complete system was designed according to the spezial requirements of RATP. Total project management and project execution was to the full satisfaction of RATP.

Installations all over the Ile of France

Because of all the good experience with the first installation – a VACUDEST M 1,500 in Sucy En Brie – four more installations have been realized in the meantime. Systems with a capacity of 200 to 350 litres per hour make sure, that yearly 6,000 m³ of emulsions and washing water are processed by VACUDEST technology: An ecologically friendly process water treatment system for an environmental friendly public transport company.

You want to produce wastewater-free in your company? Contact us.


You have questions on our VACUDEST systems?

Kindly contact us!


Your contact is:

Thomas Dotterweich
 Senior Sales Engineer

+49 7627 9239-306


You need consumables, spare parts or a maintenance date?

We will be pleased to assist you!


Your contact is:

Carles Fité
 Technical Customer Support

+49 7627 9239-888


You want to be part of our team and create the wastewater-free future with us?

We will tell you how!


Your contact is:

Bettina Böhringer
Human Resources

+49 7627 9239-201

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