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Open AccessArticle

Pretreatments of Non-Woody Cellulosic Feedstocks for Bacterial Cellulose Synthesis

Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk 659322, Altai Krai, Russia
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Polymers 2019, 11(10), 1645; https://doi.org/10.3390/polym11101645
Received: 12 September 2019 / Revised: 8 October 2019 / Accepted: 8 October 2019 / Published: 10 October 2019
(This article belongs to the Special Issue Cellulose and Renewable Materials)
Pretreatment of biomass is a key step in the production of valuable products, including high-tech bacterial cellulose. The efficiency of five different pretreatment methods of Miscanthus and oat hulls for enzymatic hydrolysis and subsequent synthesis of bacterial cellulose (BC) was evaluated herein: Hydrothermobaric treatment, single-stage treatments with dilute HNO3 or dilute NaOH solution, and two-stage combined treatment with dilute HNO3 and NaOH solutions in direct and reverse order. The performance of enzymatic hydrolysis of pretreatment products was found to increase by a factor of 4−7. All the resultant hydrolyzates were composed chiefly of glucose, as the xylose percentage in total reducing sugars (RS) was 1−9%. The test synthesis of BC demonstrated good quality of nutrient media prepared from all the enzymatic hydrolyzates, except the hydrothermobaric treatment hydrolyzate. For biosynthesis of BC, single-stage pretreatments with either dilute HNO3 or dilute NaOH are advised due their simplicity and the high performance of enzymatic hydrolysis of pretreatment products (RS yield 79.7−83.4%). View Full-Text
Keywords: non-woody cellulosic feedstocks; Miscanthus; oat hulls; pretreatment; enzymatic hydrolysis; bacterial cellulose non-woody cellulosic feedstocks; Miscanthus; oat hulls; pretreatment; enzymatic hydrolysis; bacterial cellulose
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MDPI and ACS Style

Kashcheyeva, E.I.; Gismatulina, Y.A.; Budaeva, V.V. Pretreatments of Non-Woody Cellulosic Feedstocks for Bacterial Cellulose Synthesis. Polymers 2019, 11, 1645.

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