ABSTRACT
Historically, fossil fuels have played a significant role in shaping the global and economic landscapes of the world as we know it today. However, their positives are considerably outnumbered by their negatives, such as the emittance of greenhouse gases, which directly results in global warming, a terrifying real-world consequence. It is therefore the need of the hour to look into alternative sources of fuel such as biofuels, which can be produced using renewable materials available locally. Biogas is one such biofuel, and one of the many industrially recognized processes that can be utilized to produce biogas is called anaerobic digestion (AD). As illustrated in Figure 11.1, AD is recognized as a technology that transforms waste materials into valuable resources and is appropriate for treating sewage sludge and wastewater, agricultural waste and organic waste. It offers the advantages of energy production, biofertilizer, wastewater treatment and waste reduction.
