Design Inox Vendée equips itself with waste water treatment: New VACUDEST with remote maintenance and lower treatment costs.

Design Inox Vendée's requirements for a modern wastewater treatment system were, above all, a fully automated system and a reduction in process costs.

The solution: a fully automated VACUDEST vacuum distillation system and the reduction of waste to an absolute minimum.

Design Inox Vendée manufactures stainless steel and aluminium parts for numerous industries, integrating the following surface treatments: Pickling and passivation of stainless steel, electropolishing.

Location of VACUDEST: Les Herbiers, France
Size of the company: 15 employees
Sector: Food industry, construction, industry, shipping...

This is what our customer says:

The machine is reliable and requires little monitoring and maintenance, which has allowed us to achieve our goals and reuse our process water.

State of the art

The production of stainless steel parts generates two types of waste water from surface treatment:

waste water from pickling and passivation. The parts are welded and the welding seams are then chemically treated to remove scale and increase corrosion resistance. Such a waste water contains both nitric acid and hydrofluoric acid.
waste water from an electropolishing plant. To give the parts a better optical appearance, they are treated with phosphoric and sulphuric acid and then rinsed.

The acidic process water produced during these processes, up to 1 m3/day, was previously stored in two tanks and taken over by a waste disposal company.

Design Inox Vendée wanted to reposition themselves and had the following requirements for wastewater treatment on site:

Reduction in the number of disposal vehicles and therefore costs
The concentrate should be stored in an existing outdoor tank
Introduction of remote maintenance

Solution

As a first step, the H2O GmbH wastewater-free production application centre drew up a complete balance sheet of the wastewater flows and the corresponding volumes. Critical substances from electropolishing or the passivation of stainless steel were also analysed. This part is crucial in order to avoid possible damage to the evaporator.

In the case of DIV, all products used in the process are suitable for treatment using vacuum distillation. The low content of chlorides, fluorides and other corrosive compounds in the waste water allows the use of standard stainless steel for all parts in contact with wastewater. For higher concentrations, more corrosion-resistant steel grades can be chosen.

The upstream storage capacities are used to store the contaminated wastewater. A neutralisation tank is provided to adjust the pH value, as the evaporator cannot process acidic waste water. A distillate tank with lifting station and a 1 m³ IBC container for the concentrate are also utilized.

Once the basis for the new wastewater solution had been created, the customer's specific requirements were analysed in more detail again:

Requirement 1: Setting up remote maintenance.

The latest generation of the VACUDEST vacuum evaporator is equipped with the modern Vacutouch control system, which also offers the option of remote maintenance by our customer service team.

Requirement 2: Reducing costs.

The distillation test carried out in H2O's own application centre resulted in 6% concentrate, which ultimately has to be disposed of. By reducing the volume of waste to 6%, the customer can reuse the remaining 94% as a completely clean distillate with very low conductivity (below that of tap water). This results in streak-free surfaces on the parts after rinsing. The selected Clearcat module, an oil separator integrated into the evaporator without consumables, eliminates the need for conventional post-treatment. This makes the system more compact and simpler.

The VACUDEST XS 300 Clearcat vacuum evaporator, which can process up to 1 m³/day with a concentration factor of at least 16 or a maximum of 6 % concentrate, fulfils the customer requirements. Design Inox Vendée opted for this solution and was thus able to limit the number of waste disposal vehicles travelling to and from the site.

Advantages through our solution

Sustainable

From 100 percent wastewater, 98 percent clean distillate is produced, which can be reused in your processes: You realise a wastewater-free production and thus make a valuable contribution to the protection of our environment.

Reliable

Our innovative technologies enable safe compliance with limit values. The treated water impresses with excellent quality that you can always rely on.

Economical

Nos systèmes de haute qualité ne nécessitent pratiquement pas de main-d'œuvre, économisent les ressources d'exploitation et réduisent énormément les coûts d'élimination. Par conséquent, nos systèmes s'amortissent souvent en moins de deux ans. Ensuite, vous pouvez économiser jusqu'à 10 millions d'euros en 10 ans.

Conclusion

After a few months of operation, the evaporator is delivering very satisfactory results. The managing director and head of Design Inox Vendée, Mr Massé, explains: "The evaporator was integrated and commissioned quickly. The uncertainties that arose during the commissioning of the system were addressed and resolved by H2O in a satisfactory time. The Vacutoch control panel is intuitive and familiarisation was very quick. The machine is reliable and requires little monitoring and maintenance, allowing us to achieve our goals and reuse our process water."

Ultimately, Design Inox Vendée confirms that the decision in favour of the VACUDEST solution with integrated Clearcat technology was the right one. H2O's customer service team now takes care of ensuring the availability of the machines, answering questions, carrying out important maintenance and recommending improvements where necessary.

Kompliziertes, aber erfolgreiches Einsetzen der VACUDEST auf einer Plattform in vier Metern Höhe.

Crystal-clear distillate thanks to Clearcat technology

Where other processes with a lot of equipment and operating costs barely meet the legal discharge limits, the Clearcat condensation stage impresses with the quality of the treated wastewater.

It is crystal clear and practically oil-free.

Find out more about Clearcat

Functional principle of vacuum evaporation

Vacuum evaporators are based on the simple principle of separating substances based on their different boiling points. During evaporation, compounds whose boiling point is higher than that of water remain in the concentrate. These include heavy metals, salts, oils, fats or surfactants.

The rising water vapour is virtually free of impurities. After condensation, it can be fed back into production. In this way, you produce completely wastewater-free.

You can find the video on our VACUDEST functional principle here

Remote maintenance and remote access by our experts

Our modern Vacutouch machine control system enables convenient remote access to your VACUDEST vacuum evaporator via the Internet. This applies not only to us, but also to your operators.

This saves time and money, as 4 out of 10 faults can be rectified without on-site intervention.

Find out more about Vacutouch control system