VOCUS in Flexographic Industry, a reference

Installed: 3 VOCUS systems for 3 locations

Country: Spain | Company: family owned with multiple factories

Case of the customer

In this customer reference we’d like to take you to three different production locations of this Spanish company. At these locations one of the production processes is flexographic printing in line with extrusion. The printing in these factories is typical low in amount of inks therefore the solvent use is relatively low but still above the threshold level that would require solvent emission treatment to prevent solvents to be emitted into the atmosphere. These solvents emissions are restricted by EU law due to the effect of the solvents on the formation of photochemical SMOG and other related environmental and health issues. The Spanish group was searching for an end of pipe technology to clean the air from the solvents. They were looking at the available technologies and wanted to choose the most effective technology for their situation.

Solution by Pure Infinity

Conventional techniques that are typically used in the flexo printing industry are incinerators. They bring the air over 850 degrees Celsius to burn the solvents. At autothermal concentrations the incinerators are designed to be able to run without external (fossil) fuel. Unfortunately, at all three locations the solvent concentrations were too low to reach autothermal conditions. This would mean that a lot of additional fuel would be necessary to burn the solvents. It was for sure that the operational costs of an incinerator would be very high.

In these situations, the VOCUS of Pure Infinity comes in very advantageous, it uses no additional fuel or chemicals to remove the solvents from the air. The VOCUS is a modern biological solvent removal system, it is the biology that consumes the solvents until the air emission is clean. Even the pressure drop of the VOCUS is much lower than an incinerator, and therefore uses much less electricity of the fan. The VOCUS is therefore on its best with these lower and very fluctuating solvent concentrations.

It was decided to start with one of the factories to phase the project. In 2016 the first VOCUS system was installed in a factory in the north of Spain. The second VOCUS was installed a year later in the second factory and the third VOCUS another year later in the third factory in the south of Spain.

Positive effects for our customer

  1. Financial: company saved a lot on fossil fuel per year per factory. As such the ROI on the VOCUS compared to the incinerators was very short.
  2. Sustainability: CO2 footprint is much lower with the green VOCUS solution than when the group had bought 3 incinerators.
  3. Clean air: The factories are all within the legal limit on solvent emissions and have a significant contribution to clean air.

3x VOCUS installations at 3 different factories as described above are based on the following specifications.

Airflow (m3/h) Tons of solvent in emission per year (ton/yr) Year Installed
9.000 m3/h 27 2018
9.000 m3/h 33 2017
9.500 m3/h 55 2016

All systems have been handed over with longer time measurements of in and outlet concentrations to proof the performance. All measurements were largely within the limits as promised and therefore successful.

Companies all over Europe have chosen Pure Infinity to solve their solvent emission problem with VOCUS. For example:

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VOC removal at high level furniture producer – Porcelanosa/Gamadecor

VOC emission treatment, solvent emission treatment.
VOC emission treatment at Gamadecor. VOCUS installed in 2009


The VOCUS installation was installed in 2009 and still running to the satisfaction of Gamadecor. Find the impression of Gamadecor here


The Biotrickilng Filter performance is based on the natural process of biological oxidation (aerobic degradation) of organic compounds (COVs) that yields ultimately inert products such as carbon dioxide (CO2) and water. In a Biotrickling filter reactor, the polluted air to be treated is passed through a bed on which it has developed a film of microorganisms (biofilm) which are the responsible for degrading organic contaminants to carbon dioxide and water. In turn, an aqueous phase is circulated continuously through the bed allowing adequate biofilm irrigation. In the figure it can be seen the functioning of this system. This cleaning technology is especially attractive for treating large volumes of polluted air with low concentrations of (VOCs)

because of simplicity, low operational cost and minimal environmental impact since it does not generate toxic or hazardous waste products.


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