The principal factor in determining the CH4 generation potential of wastewater is the amount of degradable
organic material in the wastewater. Common parameters used to measure the organic component of the
wastewater are the Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD). Under the
same conditions, wastewater with higher COD, or BOD concentrations will generally yield more CH4 than
wastewater with lower COD (or BOD) concentrations