Biogas is mainly composed of 50 to 70 percent methane (CH4), 30 to 40 percent carbon dioxide (CO2) and low amounts of other gases as shown in the table below.
यस ग्याँसमा ५०-७० प्रतिशत मिथेन (CH4), ३०-४० प्रतिशत कार्वनडाइअक्साइड (CO2) र अन्य ग्याँसको समिश्रण हुन्छ।