Bioconversion of fish discards through the production of lactic acid bacteria and metabolites: sustainable application of fish peptones in nutritive fermentation media

In the current work, we study the capacity of 30 peptones obtained by enzyme proteolysis of ten discarded fish species (hake, megrim, red scorpionfish, pouting, mackerel, gurnard, blue whiting, Atlantic horse mackerel, grenadier, and boarfish) to support the growth and metabolite production of four...

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Bibliographic Details
Published in:Foods 2020-09, Vol.9 (9), p.1239
Main Authors: Vázquez Álvarez, José Antonio, Durán, Ana I., Menduíña, Araceli, Nogueira, Margarita, Gomes, Ana Maria, Antunes, Joana, Cardoso Freitas Lopes de Freitas, Ana Cristina, Dagá, Esther, Dagá, Paula, Valcarcel, Jesus
Format: Article
Language:English
Subjects:
Acetic acid
Acid production
Amino acids
Bacteria
Bioconversion
Biomass
By products
Chemical properties
Costs
Economics
Fermentation
Fish
Fish (Food product)
Fish discards valorization
Food science
Lactic acid
Lactic acid bacteria
Lactic acid bacteria production
Logistic equation
Mackerel
Marine peptones
Metabolites
Microbial bioconversion
Nitrogen
Peptides
Peptones
Probiotics
Profitability
Proteins
Proteolysis
Sustainability
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Summary:In the current work, we study the capacity of 30 peptones obtained by enzyme proteolysis of ten discarded fish species (hake, megrim, red scorpionfish, pouting, mackerel, gurnard, blue whiting, Atlantic horse mackerel, grenadier, and boarfish) to support the growth and metabolite production of four lactic acid bacteria (LAB) of probiotic and technological importance. Batch fermentations of Lactobacillus plantarum, L. brevis, L. casei, and Leuconostoc mesenteroides in most of the media formulated with fish peptones (87% of the cases) led to similar growths (quantified as dry-weight biomass and viable cells) and metabolites (mainly lactic acid) than in commercial control broth (MRS). Comparisons among cultures were performed by means of the parameters obtained from the mathematical fittings of experimental kinetics to the logistic equation. Modelling among experimental and predicted data from each bioproduction was generally accurate. A simple economic assessment demonstrated the profitability achieved when MRS is substituted by media formulated with fish discards: a 3–4-fold reduction of costs for LAB biomass, viable cells formation, and lactic and acetic acid production. Thus, these fish peptones are promising alternatives to the expensive commercial peptones as well as a possible solution to valorize discarded fish biomasses and by-products.
ISSN:2304-8158
2304-8158
DOI:10.3390/foods9091239