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In REMOWE project one target has been to identify a model for sustainable waste-to-energy production, taking into account region specific characteristics, bottlenecks and restrictions.
As a concrete result of the work, a new type of modelling tool with map-based user interface has been developed in cooperation with the project partners and external stakeholders (SMEs, regional authorities, energy companies). The modelling tool uses the regional input data on available biodegradable waste fractions, their annual amounts, properties and generation locations to calculate regional biogas production potential and areas, energy and economic balance and GHG emissions of the production.
Results and conclusions for municipalities
For the sake of energy supply security, more attention should be paid on how to utilize the existing energy potential in biodegradable waste. House hold biowaste should be separated and separately collected also in rural areas. Municipalities should offer farmers possibility to get either direct investment subsidy or production subsidy for the most energy efficient installations. Improved heat insulation as well as simple heat recovery systems is needed for farm scale biogas production. If farm scale biogas plants are subsidized and energy efficiency significantly improved, markets are also open for developed gas upgrading systems for traffic use which would utilize farm based biogas.
Results and conclusions for municipalities for industry & SME’s
Sustainable biogas CHP and biomethane production was studied in North Savo region which showed that only two biogas plants would be enough to handle biodegradable waste. Markets are open for handling sludges of 44 kt/year and 7 kt/year of biowaste that are collected nowadays. Total reactor capacity needed in North Savo would be about 8 000 m3. Biowaste has sustainable transportation distance of more than 1 000 km which supports the fact that the degree of biowaste collection from households can be increased. Local low temperature heat sources from e.g. forest and food industry should be utilized in biogas production which could improve significantly biogas plants’ energy and economic performance.
Results and conclusions for municipalities for politicians
Biogas plants are recommended to handle farm-based and municipal-based feedstocks in different installations. The utilization of manures and spoilt crops for farm-scale biogas production should be subsidized since the biggest energy potential lies in farm-based feedstocks. If municipal-based feedstocks from North Savo are utilized the most cost efficient locations for biogas plants would be Lapinlahti and Kuopio. Depending on the type of biogas plants installation and the energy end product, gate fees for biowaste, sludges, manures and spoilt grass silage are presented. Waste and energy companies could co-operate in a more efficient way for the common good.
ISBN: 978-952-203-169-3 (paperback)
ISBN: 978-952-203-170-9 (PDF)