Internship Activated Carbon Regeneration

Internship: Activated Carbon Regeneration

HoSt contributes to the success of a circular economy by producing renewable energy, solving the waste problem and creating valuable end products from organic waste. From that point of view, HoSt is one of the largest suppliers of installations that convert all kinds of organic waste into biogas. HoSt does this by means of fermentation installations. In these installations, part of the organic waste is converted into biogas with the help of bacteria. However, this biogas is not clean enough to be used immediately. That is why extra steps have to be taken to clean this biogas into biomethane, or natural gas. The most common contaminants contained in this biogas are volatile organic compounds (VOC) and hydrogen sulfide (H2S). The former being a collection of many components such as ketones and terpenes.

These contaminants are removed from the biogas using activated carbon barrels. These are two types of barrels, because two types of activated carbon are used. Hydrophobic activated carbon is used to capture VOCs, while impregnated activated carbon selectively removes the H2S.

At the moment, HoSt uses all activated carbon once. By properly monitoring when the activated carbon is full, the used activated carbon is replaced in time with new activated carbon. Since activated carbon is not cheap (both to purchase and to dispose of), it is therefore important to use activated carbon as efficiently as possible. One of the ways to do this is to upgrade the activated carbon at higher temperatures. By doing this it is possible to use the same activated carbon more often.

To investigate this possibility, HoSt has designed a pilot installation which will be built very soon (expected at the end of October). This assignment is intended to conduct on-site research with this new pilot installation. This pilot installation will be linked to a side stream of the existing, running, fermentation installation in Waalwijk. This gives HoSt the unique opportunity to conduct research into regenerating activated carbon under different conditions with a real biogas.


  • Chemical Engineering (HBO or WO)


  • Operating the activated carbon upgrading pilot installation
  • Carry out tests with the pilot installation
  • Assessing the adsorption and desorption behavior of (different) activated carbon
  • Assess the potential of activated carbon upgrading at HoSt installations.


  • Monthly fixed fee of €400 based on 40 hours per week;
  • Lots of responsibility and room for own initiatives;
  • Professional support, guidance and insights;
  • An internship in the renewable energy sector;
  • Interesting international environment which is only a 5-minute walk from the ‘Kennispark’ train station in Enschede;
  • Nice welcome package;
  • A dynamic, flexible and passionate team.


HoSt is a major turnkey supplier of biomass energy plants worldwide. With over 135 employees, HoSt has been developing, engineering, manufacturing and maintaining innovative and proven bioenergy installations for the production of renewable energy from biomass and waste since 1991. HoSt contributes to the success of a circular economy by producing renewable energy, solving waste problems and creating valuable end-products from organic waste.

In addition to the headquarters in Enschede in the Netherlands, HoSt has offices in France, Latvia, England, Croatia and Germany. For the biogas installations, biogas engines, biomass boilers and biomass-fired heat / power plant supplied by HoSt, HoSt has 24/7 maintenance teams in various countries.


Mail your resume and motivation to [email protected] General questions can be addressed to Mariëtte Huis in `t Veld, internship coordinator. For questions and more details about the internship please contact Thomas Brouwer via +31 (0) 53 – 460 90 80.

Please do not make use of this vacancy as an acquisition opportunity.