[leadloud]

hello everyone 
I have a project a bout designing a digester to produce biogas for a small country.
wastes we want to digest are  from agricultural sector, animal manure, and water treatment sludge.
i want to ask about the details of design of digestion tank :
how to calculate(determine) the flow rate of waste to digester  daily , i have a waste amount of about 2 million tons per year and I decided to use a continuous flow digester .
 ? and how to make balance between stored waste and the amount I want to digest?
please if someone had this experience tell me ? or any useful design references
thanks a lot