This objective book has been written for students, academicians, aspirants for competitive exams, industry persons and bio-energy professionals to give all the objective information in the domain of biogas technology. This book provides a basic overview on anaerobic digestion, chemistry of biogas production, biogas plants, factors affecting biogas production, bio digested slurry utilization etc. With this basic knowledge one may be able to suggest or find solutions in the aspects of biogas technology in real-life situations.