In recent years, world economy has achieved considerable economic and social, but this has resulted in the widespread degradation and depletion of natural environment. Solid-waste generation increases exponentionally due to rapid urbanization, but inappropriate waste handling causes health hazards and environment degradation. The goal of strengthening bio-based economy is related to biogas solutions with respect to solid waste management in ways. Bio based economy demands new ways of philosophy and co-operation and across sectors to minimise the environmental footprint and climate throughout the value chain. The range and significance of biogas technologies increased rapidly during the last 30 years for the treatment of organic. The typical way of perceiving the role of biogas solutions is as a last step in the biomass where renewable energy in the form of biogas is produced with bio-fertiliser. Among the existing technologies for waste treatment, anaerobic (AD) plays a key role in reducing waste along with the generation renewable energy as it plays a key role in reducing the adverse effects on environmental climatic changes of the biosphere such as the reduction of NOx and CO2 in the atmosphere, leading to reduced carbon foot print and reduction in waste accumulation. However, AD of organic waste with conventional digesters not practicable for the processing of large quantities of waste generated in. The aim of the present work is to present knowledge and technological gaps slow rate and high rate biogas solutions that emerged in India, used to replace fuels with renewable and green fuel (biogas) through initiatives up by the governmental and private organizations.
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Begum et al. (2018) studied this question.