We have done something on healthcare waste management last year. Depending on the type of information you are looking for, we can collaborate. one of my PhD students is doing food waste management, though he is still at an early stage of his research, hope he will also have to deal with bio-digestion for energy generation. If this can be relevant to what you are focusing on, please feel free to contact me.
There is no specific technology for anaerobic biodigestion for low income countries as far as I am aware of, however I would suggest you to search thru Google 'Letting a group' in the Netherlands. There are experts in their team as they have some similar projects in Africa.
We have developed many facilities to set up cost effective anaerobic treatment of biodegradable liquid waste. There we developed a coir fibre based stationary media, coir fibre based odour filters, cheaper system configurations, etc. All the developments were done for rubber factory waste-water treatment. But can effectively used for treatment of any other biodegradable waste-water. Attachments may help you to get more information.
Personally i am not working on anaerobic biodigestion. But i know some researcher who is researching on that topic. In Bangladesh S. M. Lutful Kabir, Professor of Microbiology and Hygene department is `continiously reserach on that topic. You can contact with him if you feel interest. His mail address is- [email protected].