Szukana fraza: [Abstract = "In addition, the physico\-chemical properties of the ashes were determined. All the substances tested have high energy potential and can be used as biofuel. Fluid's biochar had the best energy properties due to the highest calorific value and heat of combustion, as well as carbon content, with a small amount of ash. Varying composition of the ashes obtained still poses a problem in developing methods for their management."]

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