You are using an outdated browser. Please upgrade your browser to improve your experience.
Javascript is disabled in your web browser. For full functionality of this site it is necessary to enable JavaScript.
This website is using cookies.
We use them to give you the best experience. If you continue using our website, we'll assume that you are happy to receive all cookies on this website.
CPOTE2022 logo
7th International Conference on
Contemporary Problems of Thermal Engineering
Hybrid event, Warsaw | 20-23 September 2022

Abstract CPOTE2022-1169-A

Book of abstracts draft
slider slider slider slider slider slider

Hydrogen generation from sewage sludge - an energy-based market check-up

Wojciech KOSTOWSKI, Silesian University of Technology, Poland
Mariusz TAŃCZUK, Opole University of Technology, Poland
Michał MAJCHRZYK, Proen Gliwice sp. z o.o., Poland
Aleksandra BANASIK, Silesian University of Technology / PROEN Gliwice sp. z o.o., Poland
Adam KLIMANEK, Silesian University of Technology, Poland

The paper presents some critical remarks on a commercial pre-feasibility study for various concepts of hydrogen generation from dewatered sewage sludge. Three commercial offers (two from the European and one from the U.S. market) have been analysed in terms of chemical reactions and energy balance of the process. The analysis was done for a typical municipal wastewater treatment plant sized Population Equivalent (PE) = 160,000. It has been shown that one of the offers (despite being provided by a representative of a major European process engineering company) is incorrect regarding both the possible production resulting from chemical reactions and from the point of view of energy balance. Another commercial offer is thermodynamically correct however it excludes the unavoidable and crucial energy demand for drying of the sludge before processing. Based on these observations corrected values of hydrogen yield and energy consumption have been determined and process efficiencies have been calculated. It has been found that Technology#1 represents an impossible application due to major inconsistencies in the energy balance. The obtained efficiency for Technology#2 and Technology #3 equals 31.4% and 41.2%, respectively. Since the market for sludge-to-hydrogen conversion technologies is not well developed, and the information provided from the market is not fully reliable, it is recommended to gradually build the final solution starting from hydrothermal carbonization of sewage sludge, which can be used as the first step towards hydrogen production, but is also useful as an independent solution.

Keywords: Hydrogen, Sewage sludge, Energy balance, Efficiency, Markets