Production Control System for Compressed Natural Gas (CNG) with Web-based Monitoring Technology and Leak Detection System

Too much reliance on fossil fuels to meet global energy demand also drives current global warming. To lessen dependency and help reduce global emissions from fossil fuels, this study focuses on the production of purified biogas compressed as natural gas that can replace electricity and LPG as an energy source for cooking. 85:15 mixture ratio of pig manure and coconut meat was used for anaerobic digestion to produce biogas. Purification through removal of Hydrogen Sulfide (H2S), Carbon Dioxide (CO2), and Water Vapor to increase Methane (CH4) was performed with the use of steel wool, water, and silica gel. Pressure, temperature, pH value, and gas percentage composition are the parameters measured and monitored from the web-based software. Control points of the system are solenoid valves that allow gas flow between the units only if set parameter criteria are met. The system is also capable of sending SMS alerts during methane leakage. The production peaked at the end of the fourth week, with a total of 64.52 psi of purified biogas compressed into an aluminum cylinder. Biogas methane concentration and calorific value of raw biogas were improved from an average of 63.82% to 91.85% and 20.55 MJ/m
³
to 37.50 MJ/m
³
allowing it to be called natural gas. Finally, its cooking capability was tested when the Compressed Natural Gas (CNG) was used to boil 500 mL of water that took 5 minutes and 15 seconds.