This is a substantial blog that focusses on household and catering scale, electric dehydrators and dehydration processes. Started in May 2016 the Blog is edited by Linda and is focussed admirably are promoting drying as a part of household nutrition.
The blog has a wealth of information on kitchen scale dehydrators with really good comparative surveys of what’s available. There is a lot of process information available and some information on more general aspects of food preservation. There is, however, little on sun drying and small enterprise scale drying, but you should find more of these by contacting me and searching the site.
Have a look – worthwhile!