[Digestion] Biogas for milk cooling centres in Central Uganda

[Samantha Carter]

Hi all,


I am looking at the feasibility of replacing diesel generators with biogas generators to power milk cooling centres in dairy co-operatives in Central Uganda. The site that I am looking at for a pilot currently has a 26kW diesel generator that powers 2 refrigerators and some auxiliary equipment (lights, a computer etc) for 6 hours per day.


I have some questions that I hope you can help me with:


1. What would be an appropriate engine for generating from biogas at this power? I am considering a dual fuel compression engine (for the advantage of being able to rely on diesel if the biogas is down for whatever reason) but not sure if this is the best idea? Does anyone know of any companies that would provide appropriate engines for this application?


2. What are appropriate BMP, Total Solids and Volatile Solids numbers to use for sizing the digester (currently assuming 380m3/tonnesVS, 25%TS and 85%VS but want to check this is correct. The feedstock is 100% dairy cow manure from zero-grazing cows in rural Central Uganda.)


3. Does anyone know of any reputable companies operating in the East Africa area who have experience of biogas at this scale?


Thanks in advance for any help that you can give,
Samantha
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