Acknowledgement
First of all I would like to express my immense indebt and eternal gratitude to my honourable
supervisor Prof. Dr. Amrit B. Karki, Visiting Professor/Consultant, Centre for Energy Studies, who
gave me the idea to carry out this research work and his expert guidance and encouragement, was the
key factor in the accomplishment of this study. I am equally indebted to Prof. Jagan Nath Shrestha,
Director, Center for Energy Studies for his valuable advice throughout the entire period of this
research.
I am immensely obliged to Mr. Mahesh Maharjan, Managing Director, Great Himalayan
Poultry Farm, Chhauni, Kathmandu, for letting my study on his bio-digester.