Internship HBO/Master: Better particle settling in the THIOPAQ® biological desulfurization process

PAQUES with offices in the Netherlands, China, Latin America, North America, India and Southeast Asia is worldwide a leading player in the development, production and sale of high-quality biological purification systems for (waste) water and gas. Paques solutions are used in a variety of industries and offer enormous added value such as reuse and saving of water, generation of green energy and the recovery of valuable raw materials. Paques helps its customers to contribute to the most important challenges of our time. With its mission 'revitalizing resources' Paques offers quality and the company strives for the right balance between People, Planet and Profit.
We are looking for an enthusiastic Student/Graduate (HBO/Master) for the following Internship Project:

                       Better particle settling in the THIOPAQ® biological desulfurization process


The goal of the project is to improve the settling behaviour of sulphur particles in the THIOPAQ® biological gas desulfurization system.


The THIOPAQ® process is used to remove Hydrogen Sulphide (H2S) – a toxic and corrosive compound – from biogas and Oil & Gas streams. This allows biogas to be used as a fuel, upgraded to bio-methane, and injected into gas grids. Elemental sulphur produced by the THIOPAQ® can be used as a high quality fertilizer. There are currently more than 250 reactors operating around the globe. Check out a video explaining the process using the QR code below.

One challenge in the THIOPAQ® is the efficient removal of the sulphur particles formed from oxidized H2S. Recent insights from the fundamental biochemistry of the process have shown that particular reactor conditions can improve the settling behaviour of these particles. This internship will be focused on testing the efficiency of applying such conditions in laboratory-scale reactors. 

thiopaqstage samengestelde afbeelding

Internship activities

The following activities are expected to be part of the internship:

- Develop theoretical background: sulfur chemistry, kinetics, sulfide-oxidizing micro-organisms
- Write research plan, including safety aspects for lab work

Lab & analysis
- Operation and monitoring of continuous reactors and set-up
- Bio-chemical lab analysis of relevant parameters
- Data analysis, generation of mass balances, testing predictive models

- Final written report
- Oral presentation at Paques
Start: October / November 2021                                            
Project Location: Balk, NL 
Project Duration: 20 weeks, full time.


Your application with motivation needs to be addressed to Further information about this position can be obtained from Dhaval Mehta, Technologist (+31 (0)514-608500).