The Djilemo oven is a drying oven made up from two main components: a combustion chamber for the generation of heat and a drying chamber to place the product. The oven can be used with wood, yucca husk and other vegetable fuels. It is mainly designed to dry cassava (yucca) products (starch, chips and flour) but it can also be used with fruits and vegetables.
Distributors / Implementing Organizations
Made-to-order. A medium technical level is required to build the Djilemo oven. It is built on-site with local parts.
Intellectural Property Type
User Provision Model
Users can order product from the manufacturer.
Distributions to Date Status
Ten Djilemo ovens have been constructed in Cameroon and another ten in Ghana.
Drying capacity (lbs/m³)
It can dry between 440.9 lbs to 2204.6 lbs in 24 to 48 hours
Drying duration (hr)
Load capacity (m³)
Area of racks: 1.26 m2
Operating temperature range (°C)
about 80 ° C
Number of trays
Materials of construction
Wood and aluminum
The combustion chamber is made up of bricks like a house, a metal sheet, and a chimney. It has an opening on the back, perpendicular to the entrance of the chimney, where the fresh air is preheated. A grill separates the combustion chamber from the drying chamber. The drying chamber is made from a three layer wall: the exterior layer is made of plywood, the middle layer has insulation, and the inside has an aluminum sheet. Inside the chamber there are 10 racks distributed in two columns. Each rack is 10 cm apart from the other. The chamber has two doors to place the drying trays in the racks. On the top the chamber has an outlet for water-saturated air that is produce during the drying process. The wood-burning fireplace heats the iron sheath which radiates and emits heat. Trapped in the air heating cell, this energy will be used to heat the very humid fresh air. This air then passes through the products stored on the racks where it is charged again with water before exiting through the discharge outlet. As the hot air passes through the product it dehydrates it progressively. The trays should be interchanged during the drying process to allow homogenization of quality of the product. Product technical data
User must clean the racks and combustion chamber.
Materials are locally available.
Lifetime of approximately 5 years
Manufacturer Specified Performance Parameters
The air temperature for drying is said to reach about 80°C with low humidity. It can dry between 200 to 1000 kg in 24 to 48 hours. It consumes between 10 to 20 kg of wood in 24 hours.
Vetted Performance Status
Handling hot trays poses minor burning risks.
Complementary Technical Systems
Users can opt for extra instruments like a thermometer and fan.
Academic Research and References
Mvodo E. and Liang D. 2012. Gap Analysis of Cassava Sector in Cameroon . International Journal of Social, Behavioral, Educational, Economic, Business and Industrial Engineering. 6(11).
Compliance with regulations
The Djilemo Oven was awarded the Technological Innovations category at the regional workshop and fair on the Identification and Sharing of Innovations in West and Central Africa organized by IFAD from 23 to 27 June 2008 in Ouagadougou in Burkina Faso.