The effect on climate change of greenhouse gases from fossil fuel combustion has increased the need for clean and renewable biological energies necessary for the future. A substitution for fossil-based fuels may be renewable biofuel biogas from wastewater (WW), which has the tremendous potential to meet energy demand and minimize greenhouse gas emissions. In green energy production technology, WW is wildly attracted to biogas recovery because it has environmental and economic benefits from domestic to industrial sectors. Owing to the growth of human lifestyles, urbanization, construction of WW treatment plants, and environmental legislation, the discharge of WW with high organic strength has increased enormously in recent decades. The organics present in the WW could be transformed into biogas through biological or biochemical processes and also, the contaminants could be alleviated. The knowledge of WW to biogas conversion is crucial to improve bioenergy production with a reduced operating economy.
Clean Energy and Resource Recovery. Wastewater Treatment Plants as Biorefineries, Volume 2, 2022, Pages 301-314,