Single-Cell Protein – A Group of Alternative Proteins

Single cell proteins are the dead dried cells of microorganisms or purified protein isolated from microorganism’s cell culture, used as a food supplement to humans’ food and animals feed. World suffer from malnutrition particularly developing countries, due to rapid increase in population, increased the demand for protein and nutrients requirement. Bacteria is potential microorganism for SCP production due to high protein content, fast generation time, bio-active secondary metabolites production and can grow on various substrates. Actinobacteria species and strain have capability to produce biological active compounds, produced about two-thirds of antibiotics available in the market, actively used as antibiotics, antiprotozoal, antifungal, antiviral, anticancer, anticholesterol, antihelminth and immunosuppressant. Actinomycetes can be used as probiotic as well as single cell protein that will deal with antibiotic as well as protein source.

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Yeast single cell protein production from a biogas co-digestion substrate

10.1101/766345 ◽

2019 ◽

Author(s):

Jonas A. Ohlsson ◽

Matilda Olstorpe ◽

Volkmar Passoth ◽

Su-lin L. Leong

Keyword(s):

Single Cell ◽

Yeast Species ◽

Economic Value ◽

Protein A ◽

High Growth ◽

Single Cell Protein ◽

Cell Protein ◽

Fish Feed ◽

List Type ◽

Pichia Kudriavzevii

AbstractBiogas plants serve as hubs for the collection and utilization of highly nutritious waste streams from households and agriculture. However, their outputs (biogas and digestate) are of relatively low economic value. Here, we explore the co-production of yeast single cell protein, a potentially valuable feed ingredient for aquaculture and other animal producing industries, with biogas on substrate collected at a co-digestion biogas plant, using three yeast species well suited for this purpose (Wickerhamomyces anomalus, Pichia kudriavzevii, and Blastobotrys adeninivorans). All yeasts grew rapidly on the substrate, yielding 7.0–14.8 g l−1 biomass after 12–15 The biomass crude protein contents were 22.6–32.7 %, with relatively favorable amino acid compositions mostly deficient in methionine and cysteine. Downstream biomethanation potential was significantly different between yeast species, with the highest product yielding species (Blastobotrys adeninivorans) also yielding the highest biomethanation potential.HighlightsAll yeasts grew well on the biogas substrate, with high growth rates.Produced biomass was of high nutritional value for use in fish feed formulations.Downstream effects on methane potential were strain-dependent.Yeast biomass may be a viable biogas co-product.

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Single Cell Protein: A Potential Substitute in Human and Animal Nutrition

Sustainability ◽

10.3390/su13169284 ◽

2021 ◽

Vol 13 (16) ◽

pp. 9284

Author(s):

Bogdan Constantin Bratosin ◽

Sorina Darjan ◽

Dan Cristian Vodnar

Keyword(s):

Single Cell ◽

Animal Feed ◽

Protein A ◽

Food Competition ◽

Single Cell Protein ◽

Cell Protein ◽

Protein Sources ◽

Yeast Fungi ◽

Fast Development ◽

Nutritional Benefits

Single cell protein (SCP) is the first product of the fermentation process and has proven to be a good protein alternative. Food competition is becoming more intense as the world’s population continues to grow. Soon, SCP may be able to compensate for a protein deficit. Various global businesses are focusing on SCP production, and the scope of its application is expanding as time and knowledge increases. High quantities of SCP can be produced by microorganisms, such as algae, yeast, fungi and bacteria, due to their fast development rate and the significant level of protein in their chemical structure. Beside proteins, SCP contains carbohydrates, nucleic acids, lipids, minerals, vitamins and several important amino acids. SCP has been an effective substitute for more expensive protein sources such as fish and soybean products. In conclusion, SCP can easily replace traditional protein sources in human and animal feed without detrimental effects. Potential substrate candidates and optimization strategies for SCP production have been extensively studied. This review article focuses on the various aspects of SCP, from its production, using different substrates, player microorganisms and nutritional benefits, to its economic aspects.

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