INTEGRATED USE OF CARBOHYDRATES AND PHENOLIC STRUCTURES FOR THE FRACTIONING OF LIGNOCELLULOSIC RESIDUES

Published in Scientific Works. C Series. Veterinary Medicine, Vol. LVIII ISSUE 3
Written by Letiţia Purdoiu, Viorica Chiurciu, Alexandru Nicolae Popescu, Elisaveta Ţuluca, Cristina Dinu-Pîrvu, Maria Ichim, Lucian Ioniţă, Simona Ivana

The paper presents the results of fractioning the biomass towards its bioconversion to ethanol for both – the carbohydrates resulting from hemicelluloses and from the ones of the lignocellulosic complex. Therefore not only methods of chemical hydrolysis were applied, but enzymatic ones too, using products developed in our own laboratories. Also, the possibility of turning into account the phenolic compounds – with high antioxidant potential – was closely looked into, as the phenols are the result of the enzymatic cleavage of the lignocellulosic edifice, rigidly structured. This treatment, unlike the acid hydrolysis, does not cause degradations in the aromatic structures, when submitted to high temperatures. The distillation process, as well as the correction one for the ethanolic solutions that came both from the pretreatment phase and from the celluloso – lythical saccharification phase were performed in the same fashion, using the identical methodology. The results were, therefore, comparable and compared as considering the bioconversion yields and the „INVENTA AG” protocol, applied in Switzerland, through which a quantity of 95% ethylic acid is obtained, that is of 240 liters/tone ligneous dried residue.

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Purdoiu L., Chiurciu V., Nicolae Popescu A., Ţuluca E., Dinu-Pîrvu C., Ichim M., Ioniţă L., Ivana S. 2012, INTEGRATED USE OF CARBOHYDRATES AND PHENOLIC STRUCTURES FOR THE FRACTIONING OF LIGNOCELLULOSIC RESIDUES. Scientific Works. C Series. Veterinary Medicine, Vol. LVIII ISSUE 3, PRINT ISSN 1222-5304, 372-380.


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