Comparison Study of Biogas Upgrading Removal of H2S by Using Adsorption, Absorption and Bio-filtration Techniques

Energy is a critical need for our planet, and as the population and demand grow, it will be important to find new renewable energy sources. Biogas is a by-product of the decomposition of organic waste materials under anaerobic condition by using a digester, since all biogas streams commonly contain harmful impurities, such as Hydrogen Sulfide (H₂S), a chemical compound that is widely referred to as extremely poisonous to humans, corrosive, and very flammable. This study demonstrates how to purify biogas by removing the H₂S concentration. The H₂S was removed by means of Absorption, Adsorption and Biological filtration unit which converts H₂S into elemental Sulphur (S). These results are compared with those three H₂S removal techniques and the results demonstrate that, a larger percentage age of H₂S eliminated by adsorption technique have better removal efficiency (94%) the second one is Bio-trickling filter (85%) and the third one that have lowest efficiency is absorption technique (82.7%). Further research may be conducted to improve or enhance the efficiency of these techniques.