Fossil fuels are inadequate to satisfy the demands of increasing energy consumption as the pace of industrialization and consumption is quite high. It is important to consider renewable and recyclable energy resources such as biogas, Biomethane and BioCNG. These raw to purified fuels have several advantages in terms of production costs as well as reduction in environmental pollutants. The management and handling of conventional fossil fuels is difficult compared to the renewable fuels. The current technology used for production of fuels is not found to be commercially viable or environmentally safe, so there is a need to focus on efficient techniques such as BioCNG. The BioCNG has many advantages such as half of the cost of gasoline and diesel, tailpipe emissions lower than fossil fuels, reduction in imports, and significant support to establish circular economy. Researchers have synthesized BioCNG production mechanisms and many of them are commercialized which are based on cow dung, poultry liquor, kitchen waste and spent wash substrates. However, no significant work is done with mixed agro-waste as the substrate for digestion. This is the unique attempt presented herewith to address and tap the potential of usage of mixed agro-waste for BioCNG production which is available in India in ample quantity. The present work emphasizes on the production of BioCNG from various waste, especially from mixed agro-waste and highlights the significance of agro-waste in energy self-sufficiency of India