Of particular importance is its application to the treatment of animal wastes where it can play a significant role in minimising the uncontrolled emission of methane to the atmosphere, thus reducing the impact of greenhouse gases associated with livestock management. The microbiology of the process relies on a number of interdependencies which allow a variety of complex organic materials to be converted to methane through the processes of hydrolysis, acidogenesis, acetogenesis, hydrogenogenesis and methanogenesis (Demirel and Scherer, 2008).