Member's Area - Login/Register

Bioconversions of olive oil mill wastewaters blends

Paper Topic: 
Green Chemistry and Sustainable Development
 
Volume: 
 
 

Pages :
14 - 18

Corresponing Author: 
M. SOUPIONI
 
Authors: 
Soupioni M., Drenogianni K., Balamatsi M.
Paper ID: 
gnest_02738
Paper Status: 
Published
Date Paper Accepted: 
10/10/2018
Paper online: 
15/10/2018
Abstract: 

The ability of the anaerobic mixed bacterial culture from an upflow anaerobic sludge blanket (UASB) bioreactor to convert blends of olive mill wastewaters (OMWs) with synthetic glucose medium or molasses into ethanol simultaneously with organic acids (OAs) was studied in the present work. All fermentations were conducted by free cells under non-aerated conditions at 37 οC and the effect of OMWs concentration on ethanol and OAs production was investigated. The highest amount of bioethanol (14.7 g L-1) was produced during fermentation of 45 % v/v OMWs mixed with synthetic glucose medium (5 % w/v) in only 28 hours. In mixtures of 30 % v/v OMWs and molasses solution (3 oBe) 13.4 g L-1 of bioethanol were produced. Also, 16.2 g L-1 of succinic acid were produced, when 65 % v/v OMWs mixed with synthetic glucose medium. Moreover, totally 11.6 g L-1 of varied OAs (succinic, malic, butyric and acetic) observed in mixtures of 35 % OMWs with molasses. Finally, it has been shown that the 14C-labelled glucose uptake rate (GUR) by biomass was strongly correlated to fermentation rate.

Keywords: 
Olive mill wastewaters (OMWs), fermentation, culture of upflow anaerobic sludge blanket (UASB) bioreactor, molasses, ethanol, 14C-labeled glucose uptake rate