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75% of the area of Poland is covered by dystric, brunic, luvic and albic soils, with only <1% of total surface covered by very good soils i.e. chernozems [Skłodowski, Bielska, 2009]. It is necessary to fertilize poor soils in order to use them effectively. Soil quality is improved in Poland through liming (control of chemical reaction), enrichment of sorption complex, introduction of the organic substance (peat, brown coal, organic fertilizers) or through enrichment of loamy fraction (soil loaming, synthetic sorbents, natural modified sorbents), phytostabilization and synthetic fertilization [Karczewska, 2009]. Recently, particular attention was paid to opportunities of improvement of soil properties through the use of biochar. Such studies have been carried out both in Europe and all over the world [Hunt et al. 2010]. Previous studies have demonstrated that biochar in soil increases fertility through im

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The paper presents the results and analysis of biomass processing in order to provide the conditions for the most profitable use of the biomass in modern and efficient power generation systems with particular attention put on the decrease of the emission of carbon dioxide (CO2) and no need to develop carbon capture and storage plants. The promising concept of CO2 storage via the production of biochar and the advantages of its application as a promising carbon sink is also presented and the results are supported by authors' own experimental data. The idea enables the production of electricity, as well as (optionally) heat and cold from the thermal treatment of biomass with simultaneous storage of the CO2 in a stable and environmentally-friendly way. The key part of the process is run in a specially-designed reactor where the biomass is heated up in the absence of oxygen. The evolved volatile matter is used to produce heat/cold and electricity while the remaining solid product (almost completely dry residue) is sequestrated in soil. The results indicate that in order to reduce the emission of CO2 the biomass should rather be 'cut and char' than just 'cut and burn', particularly that the charred biomass may also become a significant source of nutrients for the plants after sequestration in soil.

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