The Effect of Different Substrates on H₂S and N₂ Production in Biogas Production

The aim of this study is to determine the hydrogen sulfide (H2S) and nitrogen (N2) ratio of biogas produced from various combinations of cattle waste (CW), three different Switchgrass (SG) (Panicum virgatum L.) plant varieties (Kanlow (SG1), Shawne (SG2), Alamo (SG3) and sugar beet (Beta Vulgaris L.) leaves (BL). In the study, a laboratory-scale biomethane application setup was established to determine the biogas potential. Within the scope of the research, a trial design was created as 1st application group, 2nd application group and 3rd application group. In the established application setup, biogas measurements were recorded in a computer environment for 16 days, 30 days and 43 days, considering the end of biogas production of the materials. During the measurements, temperature and pH values were checked at certain periods and mixing was done by shaking by hand every day. Applications were carried out considering 10% dry matter ratio. Methane (CH4) in biogas is a valuable energy source, other components constitute a major obstacle to the commercial use of biogas. The variable composition is due to the various materials that can be used for the production of biogas. In the study, the effect of H2S and N2 ratios of biogas obtained from mixtures of different materials at different ratios on biogas production was investigated. As a result of the measurements made, the biogas components of each mixture were measured using a gas analyzer. H2S and N2 ratios obtained from different substrates were determined. The highest H2S ratio was measured from cattle waste with 12 ppm, and the highest N2 ratio was measured in the CW-SG3 mixture with 32.1%.