Internship: Optimization of the Regeneration Process for Suspended Ion eXchange (SIX®)
Join the R&D team and help optimize the regeneration of our pioneering SIX® technology—shaping sustainable water treatment solutions applied worldwide.

PWNT, part of Nijhuis Saur Industries (NSI), offers an exciting internship position within the Research & Development team. During this internship, you will contribute to optimizing the regeneration process of the innovative Suspended Ion eXchange (SIX®) technology.
With pioneering technologies such as ion exchange, ceramic membranes, and advanced oxidation, we develop sustainable water treatment solutions that are applied worldwide.
About the InternshipThe SIX® process is a sustainable alternative to coagulation for the removal of dissolved organic carbon (DOC) in drinking water production. It works by keeping ion exchange resin in suspension and regenerating it with a sodium chloride solution.
During your internship, you will focus on optimizing the regeneration process, a crucial step for the performance of the technology. You will investigate various parameters, such as regenerant flow rates and concentrations, and carry out laboratory experiments (jar tests and column tests). The results will directly contribute to improving the technology at water treatment plants worldwide.
Your Tasks
- Conduct a literature review to support your experiments.
- Plan and organize laboratory activities in collaboration with your supervisor and operators.
- Perform jar tests and column tests for adsorption and desorption.
- Potentially support pilot-scale research.
- Report and present results, analyses, and conclusions.
Who are you?
- Enrolled in a Dutch BSc or MSc Chemical engineering, Chemistry or Cevil Engineering.
- Available for an internship for a minimal period of 3 months.
- Pro-active and able to work autonomously
- Good communication skills, able to express his/her own opinion and not afraid to ask for help.
- Professional command of the English language in words and writing.
Working for us means
- A valuable and challenging internship at an international organization
- Internship allowance
- Housing during the internship period
- Reimbursement of work-related travel expenses
- The opportunity to directly contribute to the sustainability of global water treatment
Join our #missionwater
- Department
- Technology & innovation (R&D)
- Locations
- Amsterdam
- Employment type
- Internship
- All entities
- PWNT
- Employment type
- apprenticeship / internship (alternance / Stage/ VIE)
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