Evaluation of pomegranate peel in ethanol production by Saccharomyces cerevisiae and Pichia stipitis

Ekin Demiray, Sevgi Ertuğrul Karatay and Gönül Dönmez

Energy, 2018, vol. 159, issue C, 988-994

Abstract: Conversion of pomegranate peel (PP), which is an abundant and valuable by-product of fruit juice industry to value added product such as ethanol, instead of discharging as agro-industrial waste was aimed in this study. Some important parameters such as H2SO4 pretreatment (0.5%, 1%, 1.5% v/v), fermentation period (6, 12, 24 h), initial substrate loading (from 2.5 to 150 g/L) were optimized in the first fermentation experiments performed with S. cerevisiae and P. stipitis yeasts. After finding the optimum conditions for ethanol production of the yeasts, effect of different nitrogen sources [yeast extract – peptone and (NH4)2SO4] and metal salts (combination of K+, Mg2+, Ca2+, Zn2+) on the production were also investigated to improve the yield, up to 44.9% for S. cerevisiae, which reached to 5.58 g/L at the end of 12 h fermentation, corresponding to 0.46 g/L/h productivity, whereas P. stipitis could produce 2.95 g/L ethanol. This study shows that pomegranate peel is a promising feedstock for second generation ethanol production.

Keywords: Ethanol; Pomegranate peel; Biofuel; Waste (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544218312659
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:159:y:2018:i:c:p:988-994

DOI: 10.1016/j.energy.2018.06.200

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().