Chiang Mai Journal of Science

     This research developed hardware and software for a catalytic combustion detector (CCD) using gas chromatography (GC) technique for measuring biogas mixtures in cow and rabbit dung to identify methane and hydrogen gas. A TGS6812 detector for combustion gas, a column for gas separation included inside the oven, nitrogen as a carrier gas, valves, a flow meter, and a temperature controller are the main components of the hardware. The detector consists of two sections connected by a Wheatstone bridge. Visual Studio IDE was used to design a program for recording and analyzing data. Cow and rabbit dung were used as raw materials to produce biogas for testing the developed system for biogas analysis due to their suitability for anaerobic digestion after 15 days of fermentation. Gas concentration analysis, employing peak height in the calibration equation with repetition experiments 7 times (n = 7), revealed an average methane content in cow dung and rabbit dung was 85.03% and 78.81%, respectively. Hydrogen was hardly present in either sample (0%). Confirmed using the spiking technique.