The 3rd stage which is the final stage of the fermentation process is strictly an anaerobic process (i.e. there must be no air) it involves the methanogenic bacteria attacking the soluble organic acids and generating methane from them. This process is activated in two alternative ways or mechanization routes. The first route being the fermenting of acetic acid to methane (CH4) and carbon (IV) oxide (CO2) and the second route involve the reduction of CO2 to methane via hydrogen gas or format generated by the action of other bacteria species( Garba, 1999).