Type of project: BSc/MSc Thesis/Internship
Duration: 5-9 months, start from January 2026 or later
Location: Wetsus, European Centre of Excellence for Sustainable Water Technology, Leeuwarden, the Netherlands
Salary: The maximum Wetsus allowance for this internship is 425 € per month. Grant holding students (i.e. Erasmus or other) receiving financial support of less than 425 € per month can apply for a top-up supplement to the maximum allowance.
Project Background
Synthetic flocculants such as polyacrylamide are widely used in (waste)water treatment due to their good flocculation capacity. The flocculation capacity of these synthetic flocculants are mainly due to their properties like high molecular weight and charge density. However, these synthetic flocculants derived from fossil fuels result in environmental issues like a high carbon footprint and potential eco-toxicity. Extracellular polymeric substances (EPS), biodegradable microbially-secreted polymers in wastewater treatment processes, have similar properties to synthetic flocculants. Therefore, EPS are considered a green alternative in flocculation.
The flocculation capacity of EPS is influenced by their properties like molecular weight, charge density, and branching degree. However, the kinetics of EPS production is poorly understood, particularly in mixed cultures under nutrient-limited conditions. Understanding the EPS production kinetics in mixed cultures is essential for improving EPS yield and flocculation performance, and for providing key insights into the scale-up from lab-scale reactors to full-scale systems.
The student joining this project will operate bioreactors and investigate the kinetics of EPS production under nutrient-limited conditions, as part of the PhD research of Bohan Chen. The outcome of this project is expected to promote EPS to outperform synthetic flocculants and contribute to sustainability in (waste)water treatment.
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Please upload two files:
You can contact Bohan Chen (bohan.chen@wetsus.nl) if you have any questions or need more information.