Abstract

The batteries containing materials which aredangerous for health and safety of environment. In some type ofbattery, its application should be replaced when the power getlost. The waste of used battery should be well manage or evenreused again for other useful purpose to reduce dangerous riskfor heal and environment. The zinc-carbon battery is a type ofbattery that can be used only one time, consist of carbon rod aspositive terminal, zinc case as negative terminal, and mixture ofcarbon powder, ammonium chloride, and MnO2 as electrolyte.Hydrogen sulfide (H2S) is impurities found in the biogas andshould be purified before further application as fuel for engine.Hydrogen Sulfide (H2S) is rising problem for the engine sincewill caused acidity to lubricant and corrosive to metal part of theengine. In this research the carbon powder of electrolyte part ofthe used zinc-carbon battery is reused as desulfurizer. Clay isadded as a binder to make possible to create a pellet. It is foundthat the carbon powder from used zinc carbon battery isexcellent as desulfurizer by adding clay as binder.