Abstract:

A critical review of solar drying relevant to countries in Africa is presented in this paper, pointing out achievements and failures, and explanations why they may have occured. Available technical information suggests that solar drying
technologies are available for a range of foodstuffs, but they need to be adapted
to the local environment. Several technologies that may be suitable for rural and industrial uses are reviewed. The greatest challenge is concerned with
technologies for rural farmers who at present have very little income to acquire
improved solar drying technologies. It is argued that solar drying has not yet
taken hold in the agricultural sector due to several reasons such as the orientation of research and development workers, promoters of related
technologies, and lack of favorable national policies. Some guidelines that can be
used for developing and ensuring the effective use of solar dryers are presented