Better Cassava Processing Methods and Equipment 1

Phase one: Introducing better cassava processing methods and equipment

 

Most of the communities growing cassava have been processing it in one way or another to extend the shelf life and to eliminate cyanide, a toxic compound released from certain types of cassava when they are not properly processed. Processing involved drying the roots on the floor or roof tops or soaking them in pits for several days before drying, and milling into flour. The products from traditional processing were often unsafe and of poor quality.

Training farmers and small-scale processors: The first phase of the project, therefore, according to Dr Adebayo Abass, our value chain specialist and the project coordinator, was to introduce better processing methods and simple energy-efficient and labor-saving equipment such as chippers, graters, and dewatering machines to smallholder farmers and processors.

 

The project, working with local government extension agents and other local institutions, mobilized the farmers into groups and trained them on mechanical processing of cassava into high-value marketable products such as dried cassava chips, high quality cassava flour (HQCF), and starch for use in homes and industries.

 

Fabrication of machines: The project also introduced prototype machine designs and worked to build the capacities of machine fabricators to ensure the machines were locally available in the five countries. One of the trainees was Peter Chisawilo that went ahead to manufacture hundreds of these equipment that were sold to processors in Malawi, Tanzania, and Uganda.. In collaboration with the project, many other equipment fabricators from DRC, Mozambique, Tanzania, Uganda, Zambia, etc, were trained.

 

Mzee Omari Musa from Sululu Farmers Group in Rufiji, South Tanzania, is one of the farmers involved in the project. He says his life and that of his fellow group members is now much better as a result of processing cassava using the modern equipment.

Finding markets: The project further tested  the starch and the flour produced by the smallholder farmers with potential end-user industries to find out if they were acceptable substitutes for imported raw materials. In Zambia, Tanzania, and Madagascar, HQCF was found to be an acceptable substitute to imported wheat in the bakeries for making bread and biscuits, and for making paper.

 

Bakefood International in Tanzania, for example, found that blending HQCF and wheat flour improved the texture of cookies and wafers. The company was exporting the wheat-cassava biscuits to Sudan. The company was therefore willing to buy 50 t of the flour per month from the processors―this requires 200 t of fresh cassava roots to be processed every month. The processing groups in Tanzania were linked to the company so they could supply the flour.  However the farmers were not able to supply the factory at the required quality and quantity of flour regularly to the disappointment of the proprietor, Mr Satya.

 

The same happened in Zambia and Madagascar. Investigation by the project showed that several factors contributed to the constraint. The most important was the inability of the smallholder, semi-mechanized processors to dry the cassava quickly to maintain quality and increase turn-over of products. Drying, a critical step in processing the flour relied on sun-drying. This was a major challenge in the processing of HQCF. The processors spread the grated cassava in the sun to dry before milling it and this limited processing during the rainy season. This led to phase two of the project.