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Bioprocessing of agro-industrial residues into lactic acid and probiotic enriched livestock feed

Authorized Users Only
2019
Authors
Mladenović, Dragana
Djukić-Vuković, Aleksandra
Stanković, Miroslav
Milašinović-Šeremešić, Marija
Radosavljević, Milica
Pejin, Jelena
Mojović, Ljiljana
article (publishedVersion)
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Abstract
BACKGROUND Growing challenges of resource depletion, food security and environmental protection are putting stress on the development of biorefinery processes for bioprocessing of residues from food and agro-industry into value-added products. In this study, the simultaneous production of lactic acid (LA) and livestock feed on a combined substrate based on molasses and potato stillage by Lactobacillus paracasei NRRL B-4564 immobilized onto sunflower seed hull (SSH), brewer's spent grain (BSG) and sugar beet pulp (SBP) was studied. RESULTS The highest total LA concentration of 399 g L-1 with overall productivity of 1.27 g L-1 h(-1) was achieved in repeated batch fermentation by SBP-immobilized biocatalyst, followed by BSG- and SSH-immobilized cells. Fermentation improved the content of proteins and ash, and decreased the content of fibers in all three support materials. In addition, the fermentation had favorable effect on in vitro dry matter digestibility and energy values of SSH and B...SG. According to assessment of probiotic potential, L. paracasei demonstrated a favorable probiotic profile, exhibiting high resistance to simulated ruminant digestive tract and significant antioxidant and antimicrobial activity. CONCLUSIONS The proposed strategy enables valorization of agro-industrial residues as value-added ruminant feed and simultaneous LA production. Following principles of circular economy, the developed process combines different raw materials and integrates them into a biorefinery process, improving the overall profitability and productivity.

Keywords:
lactic acid fermentation / sunflower seed hull / brewer's spent grain / sugar beet pulp / animal nutrition / probiotics
Source:
Journal of the Science of Food and Agriculture, 2019, 99, 12, 5293-5302
Publisher:
  • Wiley, Hoboken
Funding / projects:
  • info:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/31017/RS// (RS-31017)

DOI: 10.1002/jsfa.9759

ISSN: 0022-5142

PubMed: 31006866

WoS: 000473871700001

Scopus: 2-s2.0-85068222625
[ Google Scholar ]
URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4236
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  • Radovi istraživača / Researchers’ publications (TMF)
  • Radovi istraživača (Inovacioni centar) / Researchers’ publications (Innovation Centre)
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Tehnološko-metalurški fakultet

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