Anaerobic Digestion (AD) and Resource Recovery

This chapter delves into the captivating realm of Anaerobic Digestion (AD) and its remarkable potential for resource recovery. AD is a sustainable and effective biological process for converting organic waste into energy and fertilizers. A comprehensive overview of the AD process, with a focus on its mechanisms, operating parameters, and key factors affecting its performance. In addition, AD can utilize a variety of feedstocks, including farm residue, food waste, and wastewater sludge. In addition, a critical analysis of the benefits and challenges associated with each feedstock, including their availability, composition, and economic feasibility. The chapter also investigates various technological advancements and process optimization strategies to maximize the potential of AD and resource and nutrients recovery. The chapter highlights emerging technologies such as co-digestion, pre-treatment techniques, and reactor configurations that enhance biogas production and digestate quality. Furthermore, the chapter emphasizes the prospects and challenges in circular economy concepts, elucidating its ability to recover and harness valuable resources from organic waste streams. Finally, the techno-economic feasibility of AD technology is discussed.