Cost-effective cassava processing: Case study of small-scale flash-dryer reengineering

Tran Thierry, Abass Adebayo, Taborda Andrade Luis Alejandro, Chapuis Arnaud, Precoppe Marcelo, Adinsi Laurent, Bouniol Alexandre, Ojide Makuachukwu Gabriel, Adegbite Suraju Adeyemi, Lukombo Simon Singi, Sartas Murat, Teeken Béla, Fotso-Kuate Apollin, Ndjouenkeu Robert, Moreno Martin A., Belalcazar John, Becerra López-Lavalle Luis Agusto, Dufour Dominique. 2022. Cost-effective cassava processing: Case study of small-scale flash-dryer reengineering. In : Root, tuber and banana food system innovations: value creation for inclusive outcomes. Thiele Graham (ed.), Friedman Michael (ed.), Campos Hugo (ed.), Polar Vivian (ed.), Bentley Jeffery W. (ed.). Cham : Springer, 105-143. ISBN 978-3-030-92024-1

https://doi.org/10.1007/978-3-030-92022-7_4

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Résumé : The development and scaling out of flash-dryer innovations for more efficient, small-scale production of high-quality cassava flour (HQCF) and starch is described. The diagnoses of cassava-processing SMEs (small and medium enterprises) revealed their energy expenditures for drying were considerably higher than those of large-scale industrial companies, which was mostly due to suboptimal design of flash-drying systems. As a result, small-scale production of cassava starch and HQCF often incurs high production costs, incompatible with market prices of final products. Taking stock of this situation, RTB scientists have developed several innovations to optimize energy efficiency and costs, including a longer drying pipe, reengineered heat exchanger, larger blower for higher air velocity, and a higher product/air ratio. This was based on numerical modelling to determine the key design features of energy-efficient flash dryers, followed by construction and demonstration of a pilot-scale prototype. As a result, improved small-scale flash dryers are now being scaled out to the private sector in various countries, using the Scaling Readiness framework and achieving 10–15% gains in productivity and incomes. A method for diagnosis of process efficiency is also described, to identify technical bottlenecks and to document and measure the outcomes and impacts during the implementation of scaling-out projects.

Auteurs et affiliations

Tran Thierry, CIRAD-PERSYST-UMR Qualisud (COL) ORCID: 0000-0002-9557-3340
Abass Adebayo, IITA (TZA)
Taborda Andrade Luis Alejandro, CIAT (COL)
Chapuis Arnaud, CIRAD-PERSYST-UMR Qualisud (SEN) ORCID: 0000-0002-7833-2641
Precoppe Marcelo, NRI (GBR)
Adinsi Laurent, UAC (BEN)
Bouniol Alexandre, CIRAD-PERSYST-UMR Qualisud (BEN) ORCID: 0000-0002-6140-424X
Ojide Makuachukwu Gabriel, FUNAI [Alex Ekwueme Federal University Ndufu-Alike-Ikwo] (NGA)
Adegbite Suraju Adeyemi, FIIRO (NGA)
Lukombo Simon Singi, IITA (NGA)
Sartas Murat, IITA (COD)
Teeken Béla, IITA (NGA)
Fotso-Kuate Apollin, IITA (CMR)
Ndjouenkeu Robert, Université de Ngaoundéré (CMR)
Moreno Martin A., Universidad del Valle (COL)
Belalcazar John, CIAT (COL)
Becerra López-Lavalle Luis Agusto, CIAT (COL)
Dufour Dominique, CIRAD-PERSYST-UMR Qualisud (FRA) ORCID: 0000-0002-7794-8671