African Journal of

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12291

Full Length Research Paper

Factors affecting yeast growth and protein yield production from orange, plantain and banana wastes processing residues using Candida sp.

  A. Adoki    
Health Safety and Environment, Shell Petroleum Development Company Limited, Old Aba Road, Port Harcourt, Nigeria. 
Email: [email protected]

  •  Accepted: 19 May 2007
  •  Published: 05 February 2008



Agricultural residues rich in carbohydrates can be utilized in fermentation proceses to produce microbial protein which in turn can be used to upgrade both human and animal feeds. Studies to determine the factors influencing cell biomass production with Candida sp. using citrus fruit wastes showed that the test strain was capable of meeting its amino acid requirements in culture when supplied with inorganic nitrogen sources. The organism was capable of growth at 37°C. Supplementation of media with 0 – 15% and 0 - 6% w/v combination of dextrose and ammonium nitrate, respectively, resulted in optimal growth at a pH of 4.6 (optimum pH) after 6.0 h. However, supplementation with phosphorus was not a critical condition for growth.


Key words: Candida, Yeast, microbial, protein, production, factors, banana, plantain, orange, wastes.