EFFECT OF SOLID STATE FERMENTATION ON NUTRITIONAL CONTENT AND EVALUATION OF DEGRADABILITY IN CACTUS PEAR

Authors

  • Tamires Carvalho do Santos Pos-Graduation Program in Technology of Chemical and Biochemical Processes, Department of Biochemical Engineering, Federal University of Rio de Janeiro (UFRJ)
  • Gleiza Alves Diniz Pos-Graduation Program in Environmental Sciences, Department of Basic and Instrumental Studies, State University of Southwest Bahia (UESB)
  • Aila Riany de Brito Pos-Graduation Program in Food Engineering, Department of Basic and Instrumental Studies, State University of Southwest Bahia (UESB)
  • Aureliano José Vieira Pires Department of Animal and Rural Technology, State University of Southwest Bahia (UESB)
  • Marcelo Franco Department of Exact Sciences and Technology, State University of Santa Cruz (UESC)

DOI:

https://doi.org/10.1590/1983-21252015v28n328rc

Keywords:

Aspergillus niger. Rhyzopus sp.. Solid state fermentation. Semi-arid Land. Ruminant feeding. Nopalea cochenillifera (L.). Salm-Dyck.

Abstract

The process of protein enrichment of cactus pear (Nopalea cochenillifera (L.) Salm Dyck) by solid state fermentation with the use of Aspergillus niger and Rhyzopus sp. was studied for improving the nutritional value of this cactus species for use as animal feed. The experiments were conducted in the Agroindustrial Waste Laboratory of State University of Southwest Bahia (Brazil). To this end, we have evaluated the effects of biotransformation on the levels of protein, cellulose, hemicellulose, and lignin, as well as the potential degradability. Bioconversion was carried out using cactus pear as the only substrate, without supplementation with nitrogen, mineral and vitamin sources. The fermentation with Aspergillus niger promoted a 78% increase in/of protein content and reductions of cellulose, hemicellulose, and lignin of 40%, 36%, and 28%, respectively. Degradability, in turn, was observed to have increased by 66 % after 240 h. On the other hand, the fermentation with Rhyzopus sp. was less efficient, with a 69% increase in protein content, and reductions in cellulose, hemicellulose, and lignin contents of 30%, 28%, and 18%. In turn, degradability was seen to have increased by 51%. The fermentation of cactus pear by Aspergillus niger and Rhyzopus sp. exhibited the protein enrichment and increased protein degradability of this Cactaceae. Moreover, this is the most ever efficient micro-organism used in bioconversion. Based on the results, bioconversion of cactus is an excellent alternative to ruminant feeding in arid or semi-arid land.

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Published

31-08-2015

Issue

Vol. 28 No. 3 (2015)

Section

Technical Note

License

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