10.1186/2251-6832-4-24

Sustainable fermentation processing of two revalorized agro-industrial discards: carrot and brewer's yeast

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  • Nora R Aimaretti*1,
  • Adriana L Clementz1,
  • Agustín Codevilla2,
  • María L Rojas3,
  • Juan C Yori4,
  1. Instituto de Investigaciones en Catálisis y Petroquímica, Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santa Fe, 3000, AR Laboratorio de Investigaciones Aplicadas, Facultad de Química, Universidad del Centro Educativo Latinoamericano, Rosario, 2000, AR
  2. Laboratorio de Investigaciones Aplicadas, Facultad de Química, Universidad del Centro Educativo Latinoamericano, Rosario, 2000, AR
  3. Departamento de Química Inorgánica y Química Técnica, Facultad de Ciencias, Universidad Nacional de Educación a Distancia, Madrid, 28040, ES
  4. Instituto de Investigaciones en Catálisis y Petroquímica, Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santa Fe, 3000, AR
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Published in Issue 2013-05-06

How to Cite

Aimaretti, N. R., Clementz, A. L., Codevilla, A., Rojas, M. L., & Yori, J. C. (2013). Sustainable fermentation processing of two revalorized agro-industrial discards: carrot and brewer’s yeast. International Journal of Energy and Environmental Engineering, 4(1 (December 2013). https://doi.org/10.1186/2251-6832-4-24
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Abstract

Abstract An integrated and sustainable fermentation process was developed which enabled both the revalorization of two regional agro-industrial discards as well as by-product reuse. Carrot and brewer's yeast, which are commonly used for animal feed, were processed to obtain 77.5 L of ethanol, 450 kg of solid waste called bagasse, 970 L of liquid effluent called vinasse, and 39.8 kg CO 2 per each ton of discarded carrot. Results showed that the obtained bagasse was suitable for feeding 55 animals (calfs). The dilution of vinasse with fresh water (1:5) satisfied the requirements necessary to be used as beverage for the same number of animals, leaving a remnant which could be newly diluted (1:5) and used to irrigate a 0.025-ha carrot crop, the land dimension required to grow 1 ton of carrot.

Keywords

  • Discards,
  • Carrot,
  • Yeast,
  • Fermentation,
  • Ethanol,
  • Sustainable
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