Naslov
Biotechnological production of xylitol from lignocellulosic biomass hydrolysates

Autori
Marđetko, Nenad ; Trontel, Antonija ; Novak, Mario ; Šantek, Božidar

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Power of Microbes in Industry and Environment, Book of Abstracts / Slavica, Aanita ; Teparić, Renata, Leboš Pavunc, Andreja, Kifer, Domagoj - Zagreb : Hrvatsko mikrobiološko društvo, 2019, 94-94

ISBN
978-953-7778-17-0

Skup
Power of Microbes in Industry and Environment 2019

Mjesto i datum
Sveti Martin na Muri, Hrvatska, 15.05.2019. - 18.05.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
xylitol, Mucor indicus, lignocellulose, dilute acid pre-treatment

Sažetak
Xylitol is a sugar alcohol which can be found in vegetables and fruits in very small quantities. It is mostly used as a sweetener for diabetics and for other purposes (e.g. in toothpastes and chewing gums). Commercially it is manufactured through a chemical process that is costly, has high energy requirements, and needs extensive purification steps. However, xylitol can also be produced by biotechnological processes, which use agricultural and forestry by-products. The precursor xylose is produced by chemical and/or enzymatic hydrolysis of the lignocellulosic biomass. In this work, corn stover and corn cobs were subjected to dilute acid pre- treatment with 0.5 % w/w H2SO4 under different pre-treatment conditions. The resulting liquids were then separated from the solid parts and used for xylitol production using Mucor indicus as the working microorganism. The fermentations were carried out in baffled Erlenmeyer flasks under aerobic conditions. Xylitol production efficiencies ranged from 12.98-19.49% for corn stover, and 13.88-28.53% for corn cobs, calculated on the maximum theoretical xylitol yield (Yxylitol/xylose = 1.013 g g-1). Further improvement of bioprocess efficiency could be achieved by the lignocellulosic biomass hydrolysate detoxification before fermentation what could result in final higher xylitol concentration. Acknowledgments The research was financially supported by the Croatian Science Foundation under project No. HRZZ-IP-2018-01- 9717.

Izvorni jezik
Engleski

Znanstvena područja
Biotehnologija

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