Anaerobic digestion is a biological process that breaks down organic matter in the absence of oxygen, producing biogas and nutrient-rich digestate. In this sustainable method, microorganisms break down organic materials, such as agricultural residues, food waste, and sewage, generating valuable biogas composed primarily of methane and carbon dioxide. The produced biogas can be utilized as a renewable energy source for electricity generation, heating, and even as a vehicle fuel. The nutrient-rich digestate remaining after the process serves as an effective organic fertilizer. Anaerobic digestion mitigates greenhouse gas emissions by capturing and utilizing methane, a potent greenhouse gas, from organic waste. This eco-friendly process contributes to waste reduction and provides a circular solution for organic materials. It finds applications in various sectors, including agriculture, wastewater treatment, and municipal solid waste management. Governments and industries globally are increasingly recognizing the environmental and economic benefits of anaerobic digestion, promoting its adoption for sustainable waste management and clean energy production.