Abstract-Hydrogen sulfide (H 2 S) is found in the biogas as an impurities. The existence of hydrogen sulfide in the biogas resulting problematic for using biogas as a fuel since it will increase the acidity of the lubricant of the engine. Hydrogen sulfide is a corrosive gas that can corrodes the steel tank of biogas container. Other serious problem concerning H 2 S is, this type of gas is a harmful gas that should be avoided. This work introduces a technique to utilize aluminium chips waste that is obtained from manufacturing process. To make aluminium chips reactive to H 2 S, the ion Al 3+ should be released from the aluminium by galvanic coupling with iron in salt water. The iron uses for this purpose also come from the iron chips waste. It is found the more addition of iron chips in to the mixture of aluminium + iron the more reactive the aluminium as desulfurizer Index Terms-Aluminium, desulfurizer, galvanic coupling, hydrogen sulfide. I. INTRODUCTIONHydrogen sulfide (H 2 S) has to be removed before combusted to prevent environmental problem caused by emission of sulfur (S) compound, for reason of toxicity, and corrosion on equipment [1]. Foam formation was introduce in the early beginning for the removal of H 2 S from the gas stream [1], but this technique was not attract the customer because the reason of simplicity, especially for the consumer from developing country.A few years later Lee et al.[2] introduce method of sulfate-resistant Acidithiobacillysthiooxidans AZ11 for removal of H 2 S. This technique also not much attract attention from the consumer because it was not easy to handle the bacteria for this process.An interesting idea by utilizing waste was introduced by Yuan and Bandosz [3]. The waste that was used come from sewage sludge and metal sludge of various compositions. But this technique becomes not appropriate from economic point of view because the sludge should be pyrolysed at quite high temperature. Similar with work of Yuan and Bandosz [3], which is using waste for desulfurizer, Seredych [4] also using wastes i.e. fly ash for desulfurizer. But this technique become not popular since pyrolyses process is needed at higher temperature (950 o C).The idea of using natural product such as zeolite as Manuscript received November 5, 2013; revise February 17, 2014. The authors are with the Department of Mechanical Engineering, Engineering Faculty, Udayana University Jimbaran, Bali, Indonesia, 80361 (e-mail: nindhia@yahoo.com).desulfurizer was introduced by Cosoli et al. [5]. Zeolite is a mining product with reasonable price but not available every where. Only in certain region we can find zeolite sources from mining. Cost to delivery zeolite from mining location to the place of biogas installation could be another problem.Recently the research on promoting metal chips waste as desulfurizer was conducted by Nindhia et al. [6]. By utilizing steel chips waste, the regenerative type of desulfurizer can be developed. This type of desulfurizer can be use repetitively and already successful as a compon...