90-95 METHANE PRODUCTION FROM KITCHEN WASTE BY ANAEROBIC DIGESTION PROCESS

摘要

The anaerobic digestion process is usually applied for producing the Biogas out of kitchen waste. The efficiency of production of Methane gas (CH,) is 50-55% maximum for all practical models. We have developed a model where the efficiency of Methane production is gone upto 90-95%. This has become possible because the C02 which is usually 30-35% in all kind of anaerobic digestion reacts with Lime water. The reaction is shown below: Ca(OH)2(aq) + C02(g) → CaC03 (s) + H20(1) The purified Biomethane gas obtained mixed with Hydrogen gives better intensity with high calorific value. This is extremely clear gas. To get the Biomethane gas mixed with Hydrogen, an additional chamber is added, which produces the hydrogen gas. The chemical reaction to produce the hydrogen gas is as below: 2HC1+ Zn → ZnCl2 + H2 The uniqueness of mixing hydrogen gas is the work done under the research. Though the knowledge was available and hydrogen gas too but could not be exploited for such purposes. One basic reason might be due to high cost of the hydrogen gas. The process and chemical reaction proposed in the model is cheap and easy. Zinc is available at a very low cost in the market and HCI is also readily available at low cost. Both the items can be mixed out of which hydrogen gas will be produced.