Evaluation of Co Digestion Process with Pretreatment and with Green Leaves Additives for Biogas Production Using Multiple Substrates

Abstract

In the present day context of environmental pollution, the continuous generation of Organic wastes and its improper management has been playing a vital role. Current global Municipal Solid Wastes (MSW) generation levels are approximately 1.3 billion tonnes per year and are expected to increase to approximately 2.2 billion tonnes per year by 2025. This represents a significant increase in per capita waste generation rates from 1.2 to 1.42 kg per person per day in the next decade. Over-population, Rapid industrialization, uncontrolled urbanization and improved living standards of this 32% Urban community thereby lead to increased rate of per capita waste generation. The organic wastes which are disposed for landfill leads to the breakdown of methane, the major contribution of greenhouse gases and further leads to global warming. Among various disposal options like land filling, dumping, incineration, pelletisation, etc, Anaerobic digestion is being practiced everywhere to overcome the above mentioned problem. Anaerobic digestion technology is the most valuable approach in the waste management sector as it provides a bio fuel and organic rich manure to the society. Further, the dependency of a single substrate and its availability in adequate manner will not justify the technology as a reliable one. Thus, the anaerobic digestion technology is progressed towards anaerobic co digestion process. Co digestion is the process in which two or more substrates added together in a homogeneous manner. Commonly, the major amount of a main basic substrate is mixed and digested together with minor amounts of a single substrate or a variety of additional substrates. The co digestion technology also facilitates to provide steady biogas production throughout the season and a good fertilizer quality.In order to justify the co digestion process with organic wastes, the labscale experiments were conducted with three different cases to identify the maximum methane generation.