Optimisation of Thermal and Biochemical Methods for Recovery of Wastes from Extraction Processing of Birch Bark

Various methods for recovery of birch bark processing wastes to produce energy, carbon sorbents, biological products, and humin substances have been investigated. Optimum ways for combustion of fixed residues from extraction processing of a birch bark, which differ in moisture and ash content, have been determined by means of calculations. Clearing of a part of bast pores in the birch bark during recovery of extractives is favourable to form the developed cellular structure after carbonization and subsequent activation of bast. The produced sorbents match commercial powder sorbents, which are made from qualitative wood, with respect to their performance. Selection of cultivation conditions is performed for fungi of Trichoderma species on bast of a birch bark, these conditions providing the production of biological preparations with nutrition from ammonium nitrogen and the production of humic substances with nitric nitrogen used.