- Report
- Energy Systems
More Efficient Use of Biogas at Waste Water Treatment Plants
| 2018:476 | Marc Puig Von Friesen, Peter Odhner, Magnus Arnell, Magnus Svensson, Pontus Ivarsson, Anna-Karin Jannasch, Anna Boss, Anders Hjörnhede
The project has aimed to investigate the possible integration of heat power on
WWTP to make use of the excess produced biogas, which is currently wasted
by flaring. The project has involved a description of how the heat power could
be integrated in the heating system of the WWTP, by introducing a low temperature heating system for the digestion chamber, as well as a techno-economical evaluation of the proposed solution on three case studies at Himmerfjärdsverket (SYVAB), Klagshamn (VA-SYD) and Nyvång (NSVA) WWTPs. A more detailed investigation on actual investment costs and electricity production has been done for the case of SYVAB.
The techno-economical analysis for the three studied cases show that the integration of heat power modules from the suppliers included in the study is not economically feasible. It is, however, expected to be economically interesting for other suppliers with smaller heat power modules, especially for units < 50 kW which are exempt of energy tax.