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Single-cell proteins (SCP) as an alternative feed ingredients
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16 July 2026

The increasing demand for sustainable and efficient protein sources in animal feed has intensified the exploration of single-cell proteins (SCP) as a promising alternative to traditional protein sources such as soy, fishmeal, and corn. SCP, derived from microbial biomass produced through fermentation processes, offers a range of environmental and economic advantages, particularly in reducing the pressure on agricultural land, water, and other natural resources. This chapter investigates the technological advancements, challenges, and opportunities associated with SCP production, with a focus on its integration into sustainable feed systems. Although significant progress has been made in the development of SCP production technologies, scaling up the process to meet global demands remains a major hurdle due to high operational costs, energy requirements, and competition with conventional feed ingredients.
- 1 Introduction
- 2 Production of single-cell proteins: use of bacteria, fungi, yeasts and algae
- 3 Substrates and raw materials for single-cell protein production
- 4 Production methods for single-cell proteins: fermentation techniques and downstream processing
- 5 Advanced technologies in single-cell protein production: bioreactor design and genetic engineering
- 6 Nutritional composition and benefits of single-cell proteins
- 7 Application of single-cell proteins in livestock feed
- 8 Application of single-cell proteins in aquaculture feed
- 9 Application of single-cell proteins in pet food formulation
- 10 Case studies: application of single-cell proteins in animal feed
- 11 Environmental impact of single-cell protein production
- 12 Economic feasibility of single-cell protein production
- 13 Safety and regulatory aspects of single-cell protein production
- 14 Current limitations and opportunities in single-cell protein production
- 15 Future trends in single-cell protein development
- 16 Conclusion
- 17 Where to look for further information
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18 References
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