Anaerobic digesters are systems that break down organic materials, such as food waste and agricultural residues, in the absence of oxygen. This process is carried out by microorganisms that decompose the material, producing biogas, which mainly consists of methane and carbon dioxide. The biogas can be used as a renewable energy source for heating, electricity, or as vehicle fuel. In addition to producing energy, anaerobic digesters help reduce waste and lower greenhouse gas emissions. The leftover material, known as digestate, can be used as a nutrient-rich fertilizer for crops, contributing to sustainable agriculture. Overall, anaerobic digesters play a vital role in waste management and renewable energy production.