Introducing a new salty waste for second-generation bioethanol production

Demiray E., Ertuğrul Karatay S., Ekici H., Donmez G.

ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS, vol.40, no.17, pp.2070-2078, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 40 Issue: 17
  • Publication Date: 2018
  • Doi Number: 10.1080/15567036.2018.1487487
  • Journal Name: ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2070-2078
  • Keywords: Bioethanol, carrot pomace, fermentation, molasses, turnip juice discards, ETHANOL-PRODUCTION, SACCHAROMYCES-CEREVISIAE, SIMULTANEOUS SACCHARIFICATION, ENZYMATIC-HYDROLYSIS, FERMENTATION, YEAST, OPTIMIZATION, PERFORMANCE, IMPROVEMENT, MAGNESIUM
  • Ankara University Affiliated: Yes

Abstract

We have introduced the discards of turnip juice as a raw material for bioethanol production for the first time. Pretreatment methods, initial biomass loading, and fermentation time were investigated. Supplementation of different kinds of nitrogen sources, mineral salts and agricultural waste hydrolysates were added in the growth medium. The highest bioethanol concentrations and Q(p) values were 7.32, 5.34, 1.55 g/L and 0.61, 0.44, 0.05 g/L.h for S. cerevisiae, K. marxianus and P. stipitis, respectively. Furthermore, Y-p/s, values were 0.46 g/g, 0.47 g/g, and 0.37 g/g for the three yeasts. Turnip juice discards are promising raw materials for bioethanol production.