The method used is life cycle assessment (LCA) [2] and financial cost calculation facilitated by computer modelling with the ORWARE (Organic Waste Research) model [3] for the waste management system and the MARTES model [4] for the district heating system including CHPs. In this study waste streams suitable for thermal and/or biological treatment (including sewage sludge after wastewater treatment) are included whereas fractions for material recycling are excluded.