Please use this identifier to cite or link to this item:
https://open.uns.ac.rs/handle/123456789/4867
Title: | Wastes from bioethanol and beer productions as substrates for l(+) lactic acid production - A comparative study | Authors: | Đukić-Vuković, Aleksandra Mladenović, Dragana Radosavljević, Miloš Kocić-Tanackov, Sunčica Pejin, Jelena Mojović, Ljiljana |
Issue Date: | 1-Feb-2016 | Publisher: | Elsevier | Journal: | Waste Management | Abstract: | © 2015 Elsevier Ltd. Waste substrates from bioethanol and beer productions are cheap, abundant and renewable substrates for biorefinery production of lactic acid (LA) and variability in their chemical composition presents a challenge in their valorisation. Three types of waste substrates, wasted bread and wasted potato stillage from bioethanol production and brewers' spent grain hydrolysate from beer production were studied as substrates for the production of l(+) LA and probiotic biomass by Lactobacillus rhamnosus ATCC 7469. The correlation of the content of free alpha amino nitrogen and the production of LA was determined as a critical characteristic of the waste media for efficient LA production by L. rhamnosus on the substrates which contained equal amount of fermentable sugars. A maximal LA productivity of 1.54gL-1h-1 was obtained on wasted bread stillage media, whilst maximal productivities achieved on the potato stillage and brewers' spent grain hydrolysate media were 1.28gL-1h-1and 0.48gL-1h-1, respectively. A highest LA yield of 0.91gg-1 was achieved on wasted bread stillage media, followed by the yield of 0.81gg-1 on wasted potato stillage and 0.34gg-1 on brewers' spent grain hydrolysate media. The kinetics of sugar consumption in the two stillage substrates were similar while the sugar conversion in brewers' spent grain hydrolysate was slower and less efficient due to significantly lower content of free alpha amino nitrogen. The lignocellulosic hydrolysate from beer production required additional supplementation with nitrogen. | URI: | https://open.uns.ac.rs/handle/123456789/4867 | ISSN: | 0956053X | DOI: | 10.1016/j.wasman.2015.11.031 |
Appears in Collections: | TF Publikacije/Publications |
Show full item record
SCOPUSTM
Citations
37
checked on Mar 15, 2024
Page view(s)
32
Last Week
0
0
Last month
0
0
checked on Mar 15, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.