I happened onto this manual just now and it got me to thinking about solar drying again.
click the image to download the manual
The document was prepared as a training manual for a Zimbabwian project funded by the Austrian Embassy titled Establishment of a production, sales and consulting infrastructure for solar thermal plants in Zimbabwe.
Its a comprehensive manual covering many designs and processes which you will see in illustrations from other documents you have read over the years. The 110 page book contains descriptions of many different dryers as well as examples of many different crops and their dryers. It also presents a great deal of technical data on drying but even though the title of the project nothing about markets, packaging and selling.
Solar drying should be all the rage currently giving its potential to impact global food shortage and climate change – but we still seem to be where we were decades ago.
I must claim to having heard first hand of an area where a nut is used as a food, after having been eaten and excreted by an animal. In this area there is a strong belief that kernels from a marula nut that has been eaten by a goat are much more tasty than the untreated kernels. But here's a new one.
click the image to visit the website
There are of course coffees that have passed through digestive tracts but here the coffee is used to brew a dark beer, which has apparently sold out on its launch day, although only.
The flow sheet on the pack label needs to be studied!
This is the case with this masters thesis, which presents a nice simple (two different levels of detail) explanation of the sugar cane process. It includes the two main juice extraction systems diffusion and milling in parallel, although I am not sure whether this often occurs in practice.