News
09/22/2020
Seasonal Energy Storage Potential Assessment of WWTPs with Power-to-Methane Technology

We have published our latest research results in Energies, concluding that commercial and investment interests of future power-to-methane (P2M) technology operators, like wasterwater treatment plants (WWTPs), should be taken into account to make a step forward with seasonal energy storage, towards a more carbon-neutral energy sector.
Our research results showed that the main criterion of WWTPs for P2M technology investment was the 7-15-year-long payback period. This cannot be achieved in the current market and regulatory environment; possible regulatory changes could affect, however, some of their key motivating factors. To address WWTP stakeholders’ expectations, a total of ca. 75 million EUR public funding of CAPEX and 100 EUR/MWh biomethane feed-in tariff is needed to realize their energy storage potential in Hungary if surplus electricity sourcing costs are also minimized or compensated under a new national regulatory framework. The research also concluded that technical aspects would not be hampering factors of P2M technology deployment at large Hungarian WWTPs. The findings show that a standardized 1 MWel P2M technology would fit with most potential sites, and this is in line with the current technology readiness level of P2M.

Please, find below the abstract of the publication:

Power-to-methane technology (P2M) deployment at wastewater treatment plants (WWTPs) for seasonal energy storage might land on the agenda of decision-makers across EU countries, since large WWTPs produce a notable volume of biogas that could be injected into the natural gas grid with remarkable storage capacities. Because of the recent rapid increase of local photovoltaics (PV), it is essential to explore the role of WWTPs in energy storage and the conditions under which this potential can be realized. This study integrates a techno-economic assessment of P2M technology with commercial/investment attractiveness of seasonal energy storage at large WWTPs. Findings show that a standardized 1 MWel P2M technology would fit with most potential sites. This is in line with the current technology readiness level of P2M, but increasing electricity prices and limited financial resources of WWTPs would decrease the commercial attractiveness of P2M technology deployment. Based on a Hungarian case study, public funding, biomethane feed-in tariff and minimized or compensated surplus electricity sourcing costs are essential to realize the energy storage potential at WWTPs.

Csedő, Z.; Sinóros-Szabó, B.; Zavarkó, M.: Seasonal Energy Storage Potential Assessment of WWTPs with Power-to-Methane Technology. Energies 2020, 13 (18), 4973.

To read the full paper, please, click on the link below:
https://doi.org/10.3390/en13184973