Thermophilic biocatalysts for one-step conversion of citrus waste into lactic acid
Journal Article
·
· Applied Microbiology and Biotechnology
- Univ. of Naples Federico II (Italy); National Research Council (CNR) (Italy); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- University of Campania L. Vanvitelli, Naples (Italy)
- Univ. of Naples Federico II (Italy)
- National Research Council (CNR) (Italy)
- University of Salerno (Italy)
- Univ. of Naples Federico II (Italy); National Biodiversity Future Center (NBFC) (Italy)
Agri-food residues offer significant potential as a raw material for the production of L-lactic acid through microbial fermentation. Weizmannia coagulans, previously known as Bacillus coagulans, is a spore-forming, lactic acid-producing, gram-positive, with known probiotic and prebiotic properties. This study aimed to evaluate the feasibility of utilizing untreated citrus waste as a sustainable feedstock for the production of L-lactic acid in a one-step process, by using the strain W. coagulans MA-13. By employing a thermophilic enzymatic cocktail (Cellic CTec2) in conjunction with the hydrolytic capabilities of MA-13, biomass degradation was enhanced by up to 62%. Moreover, batch and fed-batch fermentation experiments demonstrated the complete fermentation of glucose into L-lactic acid, achieving a concentration of up to 44.8 g/L. These results point to MA-13 as a microbial cell factory for one-step production of L-lactic acid, by combining cost-effective saccharification with MA-13 fermentative performance, on agri-food wastes. Moreover, the potential of this approach for sustainable valorization of agricultural waste streams is successfully proven.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 2470649
- Journal Information:
- Applied Microbiology and Biotechnology, Journal Name: Applied Microbiology and Biotechnology Journal Issue: 1 Vol. 108; ISSN 0175-7598
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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