Abstract:
The aims of this engineering project were to study the effect of Fe (III) - EDTA concentration on the removal of hydrogen sulfide in biogas. In this experimental, the concentration of Fe (III) used in the range of 0.10 - 0.35 mol/L, the mole ratio of iron and EDTA was 1 : 1.2 and hydrogen sulfide concentration in biogas were in the range of 3.700 - 4.200 mg/m\ The result of this experimental was found that the removal of hydrogen sulfide in biogas was increased with increasing the concentration of Fe (III). After hydrogen sulfide absorption reaction, Fe (III) solution was regenerated by using the air bubbling flow rate was 500 ml/min for 120 min. It was observed that the used - Fe (III) solution was as effective as the new prepared - Fe (III) solution. In addition, the stable efficiency of the removal of hydrogen sulfide can be used the biogas bubbling together with the air bubbling in the ratio between flow rate of biogas and flow rate of air was 80 : 150.