METHANE GAS EXTRACTION FROM HOUSEHOLD WASTES

Methane, which we use for cooking gas, is mainly comes from natural gas deposits that depletes over time, but now, we can extract mehane from organic household waste by simple process. First, separate organic waste (that comes from plant or animal source) from inorganic components (such as plastics and metals). The next thing is throw them into the warming bed, which involves fermentation process. In the warming bed, organic wastes are decomposed and form mixtures of gas, mainly methane and some amount of other gases. The gases extracted from wastes are directed through dirt trap to clean up gases from solid components. After that, gases runs through gas indicators. The bubbles in the water is the mark of gas presence. Sometimes, lime is dissolved in the gas indicator water to trap excess carbon dioxyde in the form of calcium carbonate. Next, purified methane gas is crossing the gas-pressure controller. Overpressured methane gas is somewhat dangerours, so it needs to create a maximum pressure boundary with a simple trick. The gas pipe is channeled to a second pipe that submerged in the water. The underwater depth of the pipe is the upper pressure limit of the gas. We can understood it in a simple physical formula ; P = 10000 . h ; where P represents upper pressure limit in pascal, and h represents depth of water in meters. Excess gas will relased in the water and cause no harms. Next step, the gas channeled to gas holder for storage, that has a weight balance to adjust gas pressure. The last step is how to use the gas, the gas is relased from the gas tap, and after that, it distributed to stoves and water heater for everyday use.