Once the civil work is over, the plant is left for curing for 17 days.
On the 18th day, first load of raw materials can be fed into the plant. ** For the first time production of Biogas, add approximately 600 kgs of cow-dung and leave it for fermentation for 4 days.
On the 18th day, first load of raw materials can be fed into the plant.
** After 4 days, add at least 25 Kilograms of raw materials daily to the plant.
** Along with this, add equal proportion of water which means a ratio of 1:1 has to be maintained.
For example, for 25 Kgs of raw material, 25 litres of water should be added.
Pls watch the Spoken Tutorial - Generation of Biogas
Your query has been explained well with graphics.