Effect of temperature and nitrogen supplementation on bioethanol production from waste bread, watermelon and muskmelon by Saccharomyces cerevisiae

Unal M. U., Chowdhury G., Sener A.

BIOFUELS-UK, vol.13, no.4, pp.395-399, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 13 Issue: 4
  • Publication Date: 2022
  • Doi Number: 10.1080/17597269.2020.1724440
  • Journal Name: BIOFUELS-UK
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, CAB Abstracts, Chemical Abstracts Core, Compendex, INSPEC, Veterinary Science Database
  • Page Numbers: pp.395-399
  • Keywords: Bioethanol, nitrogen, waste bread, watermelon, muskmelon, ETHANOL-PRODUCTION, LIGNOCELLULOSIC BIOMASS, BIO-ETHANOL, FERMENTATION, WINE
  • Çukurova University Affiliated: Yes

Abstract

This study was undertaken to investigate the effect of temperature (25 degrees C and 30 degrees C) and nitrogen supplementation (with 20 g/L peptone or without) on bioethanol production from waste bread, watermelon and muskmelon feedstocks by Saccharomyces cerevisiae. Nitrogen addition resulted in higher ethanol yields at both temperatures. Fermentation at 30 degrees C produced a higher ethanol yield than at 25 degrees C. The highest ethanol yield of 0.502 gethanol /g fermentable sugar, at 98.22% of the theoretical maximum, was obtained from the fermentation of muskmelon juice at 30 degrees C with nitrogen supplementation. Ethanol yields at both temperatures were significantly different (p < 0.05) between the trials with nitrogen and without nitrogen supplementation for watermelon and muskmelon but not for waste bread hydrolysate. On the other hand, ethanol yields showed significant differences (p < 0.05) at 25 degrees C and 30 degrees C for all feedstocks with nitrogen and without supplementation.