Compositional Analysis of Biogas
For the determination of the constituent gases in biogas i.e. H2S, CO2 and CH4 from the total biogas produced in each digester, parallel sets containing the same and equal quantities of slurry were made. The digesters were separately connected to the inlet of a Buckner filter flask containing some quantity of silica gel that dry the biogas. The outlet of the flask was connected to another Buckner flask containing lead acetate solution in 3M Ethanoic acid. Lead acetate absorbs the H2S gas from the biogas passing through it, forming black precipitates of lead sulphide as shown in equation (1);