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Food and Bioprocess Technology

, Volume 11, Issue 7, pp 1370–1380 | Cite as

Development of a Novel Integrated Approach to Monitor Processing of Cassava Roots into Gari: Macroscopic and Microscopic Scales

  • Andrés Escobar
  • Layal Dahdouh
  • Eric Rondet
  • Julien Ricci
  • Dominique Dufour
  • Thierry Tran
  • Bernard Cuq
  • Michèle Delalonde
Original Paper

Abstract

Gari is a key staple food in several western African countries. This is a cassava traditional semolina obtained after peeling, rasping, fermentation, pressing, sieving, and roasting (cooking/drying). The process of gari production is artisanal and relies on human know-how, and the final properties of gari are highly dependent on the human skills. So as to understand the combined effect of the various transformation steps on the final quality of gari, the main objective of this work was to develop a lab-scale integrated approach to follow the transformation of the product characteristics during the process using macroscopic (water content, solid volume fraction, and particles size) and microscopic (physicochemical and biochemical) responses. At the microscopic level, pressing is a key step insofar as it induces the draining of many soluble compounds (especially the toxic cyanogenic compounds). At the macroscopic level, despite the strong similarity in median diameters of the intermediate and final products, two distinct agglomeration mechanisms occurred during the pressing/sieving and the roasting. These mechanisms highlight the structuration of the product at two different scales and at two different moments. Finally, results showed a high swelling capacity for fermented gari. The approach developed in this work will make it possible to identify the robust mechanisms, i.e., those little affected by a change in scale or in operating conditions. This identification will thereafter allow to distinguish unit operations, fairly easy to mechanize, from those requiring strict control to achieve the final product quality sought.

Keywords

Cassava Gari Lab-scale processing Physicochemical properties Hydro-textural diagram 

Notes

Funding Information

This work was supported by the CIAT Cassava Project (Colombia), CIRAD Qualisud Research Unit, and CIRAD - PhD fellowships, helps to PhD students (France), and University of Abomey Calavi, Faculty of Agronomic Sciences (Benin), and funded mainly by the CGIAR Research Program on Roots, Tubers and Bananas (RTB) with support from CGIAR Fund Donors (http://www.cgiar.org/about-us/governing-2010-june-2016/cgiar-fund/fund-donors-2/).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.CIAT, Cassava Program, CGIAR Research Program on Roots Tubers and BananasCaliColombia
  2. 2.CIRAD UMR QualisudMontpellierFrance
  3. 3.Qualisud, Univ Montpellier, CIRAD, Montpellier SupAgro, Univ Avignon, Univ La RéunionMontpellierFrance
  4. 4.IATE, Univ Montpellier, CIRAD, INRA, Montpellier SupAgroMontpellierFrance

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