task 4

Nowadays we can extract methane gas from household waste with some simple steps. First, the waste from household was accumulated in the warming bed. From this warming bed, the waste will be separated for two kinds of usages, as a fertilizer, which can be used directly without any further process, and as a main material for the methane extraction. For methane extraction, the household waste goes directly to the dirt trap. The dirt trap will cause the methane separated from other contents of the waste. Then, the methane, which is in liquid phase, flows into gas indicator. Here, the methane is checked whether its gas is still produce or not by seeing the bubbles in water. After that, the methane gas flows into two pipes. The first pipe distributes the gas to a pressure release tank in order to decrease the pressure of gas, while another pipe distributes the gas to the inner tubes (with weight on the top of it) in order to increase the pressure of the gas. At the end of this pipe, there is a tap which controls the output of the extracted methane gas. Methane that comes out from this tap is ready to use.