The given image illustrates the process of formation and utilization of biogas.
Overall, it can be observed that this illustration is a man-made linear process. This process utilises biodegradable waste to form biogas, which is then used to assist various man-made processes, for instance, to generate heat and electricity.
To commence with, the process starts when biotic substances like crops, livestock waste, food and water waste are gathered and piled into an anerobic digester. The anaerobic digester then composits and processes this biodegradable wastes with a lack of oxygen, giving rise to two new products, biogas and digestate. Biogas can be used in the formation of heat and electricity. It is commonly used as a fuel in various appliances in household and factories. Biomethane, a subproduct of biogas, can be utilized as fuel for transportation, and can further be used as a gas grid.
Futhermore, Digestate can be used for soil ammendments and as a fertilizer, to improve the quality of soil, and also for livestock bedding.