Bio-liquids are liquid fuels produced from biomass for energy purposes other than transport. According to the definition contained in the Renewable Energy Sources Act, bio-liquids are used for generating electricity or heat in systems that meet emission standards, provided such standards have been established under environmental protection regulations. Therefore, bio-liquids must not be equated with biofuels, which are primarily intended for use in transport.
The use of bio-liquids most often involves the production of heat and electricity through cogeneration. Their main advantages compared to other biomass-based systems include:
Greater operational flexibility, allowing quick response to changes in power demand;
Higher energy density;
Lower emissions during combustion of bio-liquids.
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