Biogas contains elements that are not needed in the combustion, especially water ( H2O) and hydrogen sulfide ( H2S) . In circumstances where the biogas is used as burning material ( stove) elements affect only the second decline in the flame of the stove. However, unlike if the biogas is used as fuel for generating electricity or running a generator, washing or purification of biogas to be very important because the two elements will affect the life of engine components plant. Purification purposes ( biogas purification) for condensate formed can accumulate in the gas line and also can form a corrosive acid solution when in contact with water. In addition to corrosion prevention, biogas purification also avoid the toxicity of H2S ( the maximum threshold of 5 ppm, to prevent sulfur content when burned to SO2 or SO3 with poison stronger than H2S as well as minimizing the formation of highly corrosive H2SO3.

Composition of methane contained in biogas is determining the amount of calories that it generates as well as side effects on the use of the device. To turn on the stove can be used as low quality biogas, for example in the CH4 content of between 40 to 50% , while its use to fuel the generator will require a minimum of 70% methane composition. Tool purifying methane ( methane purifier) for efforts aimed at raising the quality on performance of biogas for use as fuel for power generation ( generator sets) and the interest for electrical devices such as Biogas lamps, Rice Cooker or other electronic devices. Methane purifier is made of PVC tube, 12 inch diameter with a height of 135 cm, capable to withstand the pressure up to 1.5 bar, contain pockets of methane activators pellets ( a mixture of minerals with a strong base NaOH) that can be replaced ( refill) per 2 ( two) months of usage. The dimensions of the tool is capable of purifying methane increase benefits and quality of the generation of biogas reactor or vessel digestion ( digester) with an output of 4 hingga 8 m3 of gas per day with up to 20% increase in methane, reduced total CO2 and H2S. Pellet activator can be replaced or regenerated, re-( re) by means immersed in aquades to a maximum of 5 x or the equivalent of 1 ( one) year.