The Comparison of Biogas Filter System using Steel Capillary, Alkaline Solution and Activated Carbon for Removal Hydrogen Sulfide

Abstract

Nowadays, biogas is alternative energy. The composition of biogas is hydrogen sulfide (H₂S) was found to reduced the quality of biogas. The purpose of  research was to reduced the amount of hydrogen sulfide. The parameters studied were adsorption of hydrogen sulfide to compared the absorbent materials by using capillary steel at the amount of 1, 1.5, 2 and 2.5 kg. Sodium hydroxide (NaOH) solution at pH 8, 9, 10 and 11. Using activated carbon at the amount of 1, 2, 3 and 4 kg respectively in 25 L of filter tank for anaerobic fermentation system. The experimental biogas passes through the filter element flow rate of 0.35 L/min. The concentration of hydrogen sulfide was measured before the filter that found have 1,305 ppm and methane (CH₄) content of 70.8% in 100 L of fermentation tank. The results showed that biogas is filter through capillary steel, hydrogen sulfide can be removed up to 98.9% at the amount of 2.5 kg of capillary steel. Hydrogen sulfide can be removed up to 95.6% at pH 11 of Sodium hydroxide and filtered through activated carbon can be removed up to 50% at the amount of activated carbon 4 kg. Finally, biogas filtered through all three materials can be removed up to 99% of hydrogen sulfide.