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Microbiological culture broth designed from food waste
Miriam C Chalón1, Victoria Terán, Mario E Arena
1Centro Científico Tecnológico Tucumán, Crisóstomo Álvarez 722, 4000 San Miguel de Tucumán, Tucumán, Argentina.
Journal of Environmental Management
|December 11, 2012
Summary
Inadequate waste management increases pollution and disease. This study explored using food waste to create a valuable single-cell protein (SCP) for animal feed, finding it a viable, low-cost alternative.
Area of Science:
- Microbiology
- Biotechnology
- Environmental Science
Background:
- Municipal solid waste (MSW) mismanagement contributes to pollution and disease transmission.
- Single-cell protein (SCP) is microbial biomass with high nutritional value, suitable as a dietary additive.
- There is a growing need for safe, high-quality, and cost-effective protein additives for animal feed.
Purpose of the Study:
- To design a culture medium for microbiological assays using nutrients from organic waste.
- To produce single-cell protein (SCP) for animal feeding from food waste (FW).
- To compare the effectiveness of food waste (FW) and LAPTg media for microbial growth and assess FW broth for SCP production.
Main Methods:
- Microbiological assays were conducted using various bacterial and yeast strains (Lactobacillus, Enterococcus, Staphylococcus, Shigella, Salmonella, Saccharomyces, Schizosaccharomyces).
- Food waste (FW) and LAPTg media were compared for microbial growth.
- Saccharomyces cerevisiae growth was studied in FW broth, molasses broth, and basal broth to determine biomass yield.
Main Results:
- Microbial growth in FW and LAPTg media showed no significant difference (p > 0.05).
- Biomass yield from FW broth was 13% lower than from molasses broth after 24 hours.
- FW broth demonstrated versatility, supporting the growth of diverse microorganisms, including Gram-negative and Gram-positive bacteria and yeasts.
Conclusions:
- Food waste (FW) is a viable, low-cost substrate for producing single-cell protein (SCP) for animal feed.
- FW-based media offer a versatile and accessible alternative to traditional media, especially in regions lacking resources like molasses.
- Developing safe, high-biological-quality protein additives from waste streams is crucial for meeting global food demands.
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