Keywords
alkaline delignification
nitric acid
enzymatic hydrolysis
bioethanol
bacterial nanocellulose
lactic acid
How to Cite
Abstract
The profitability of the transformation of cellulose-containing raw materials into products with high added value is achievable only if commercial products are obtained from all its components. This paper presents the calculation of material flows for the complete processing of giant miscanthus into biotechnological synthesis products with the release of two groups of platform (intermediate) compounds: C6 sugars and lignin. Within the C6 platform, two platform chemical compounds were obtained by biotechnology methods, which are basic in modern technical chemistry: bioethanol and lactic acid, in addition, the most important biopolymer, bacterial nanocellulose, was obtained. In order to ensure the high quality of nutrient media from giant miscanthus, the products of biotechnological synthesis were obtained through the stage of enzymatic hydrolysis. For each product of biotechnological synthesis, four original methods of preliminary chemical treatment of giant miscanthus were studied, carried out at atmospheric pressure using dilute solutions of nitric acid and sodium hydroxide. High efficiency of transformation of giant miscanthus into products of biotechnological synthesis is shown, yields close to world leaders are achieved. The most appropriate method of preliminary processing of giant miscanthus is single-stage treatment with a dilute solution of nitric acid, this method allows to increase the yield of bioethanol by 12-40%, bacterial nanocellulose - by 13-30%, lactic acid by 13-28% compared to other author's methods of preliminary processing.
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