Aishee Ghosh, 
Aishani Ray, 
Akash Goswami, 
Omar Aweis Ali, 
Puneet Kumar Singh & 
Ritesh Pattnaik

Abstract

Rapid demand for energy has emerged as a global issue due to rapid industrialization and fossil fuel consumption, with serious urge to find alternative non-renewable resources for power generation. Emissions of CO₂ into the atmosphere impose a huge threat to the environment, which led to use of many renewable sources of energy as alternatives. Biogas has emerged as one of the promising approaches to address the increasing demand for energy. Among several raw substrates, the dissipated wastewater from industries can be identified as an excellent raw material for sustainable biogas production, with potential to mitigate methane emissions and also provide a source of renewable energy. Anaerobic digestion (AD) is showcased as an efficient technology for treatment of industrial effluents and subsequent generation of renewable energy from the same process. Besides, it also assists in the reduction the greenhouse effect and accumulation of industrial wastewater (as a feedstock) for sustainable environmental management. Although critical factors like substrate type, microbial consortia, moisture content etc. contribute in the process of AD, yet there are several challenges for establishing future technologies that will maximally enhance biogas production. Therefore, the present chapter aims to outline the innovative and technological feasible approaches for biogas production via anaerobic digestion that preferably would lower costs associated with wastewater treatment and disposal of wastes for ensuring circular economy.