The physical and chemical properties of biogas affect the choice of technology used for biogas scrubbing and combustion; therefore, knowledge of these properties is useful for optimizing biogas utilization. Since biogas contains primarily as bulk components methane and carbon dioxide. Other trace components (nitrogen, hydrogen sulfide, and trace organics) are present in relatively small quantity, the magnitude of which varies greatly and depends on the composition of the material digested. Although the small concentration of these traced gases have little effect on the physical properties of the gas, which influence the choice of technologies.In the present work, the analysis of the biogas composition related to its effects on the physical properties of the gas and which influence the choice of technologies used for spark ignition engines is presented. This analysis data obtained will be useful for optimizing biogas utilization with required suitable modifications for best optimum performance in the spark ignition engine.