Barasa, HenryNyaanga, DavidNjue, MusaMatofari, Joseph2024-03-012024-03-012020-05Barasa, Henry & Nyaanga, David & Njue, Musa & Matofari, Joseph. (2020). Effect of Total Solids on Biogas Production in a Fixed Dome Laboratory Digester under Mesophilic Temperature. Annals of Advanced Agricultural Sciences. 4. 10.22606/as.2020.42003.https://dx.doi.org/10.22606/as.2020.42003https://repository.nrf.go.ke/handle/123456789/622An investigation on the effect of total solids on biogas production was done using a laboratory scale batch reactor of 0.15 m3 capacity. The feedstock was dung from dairy cows managed under a free-range system. Experiments were done on a substrate having total solids of 6%, 7%, 8%, 9%, and 10% at a constant temperature of 35°C; and the mean biogas production was 0.249, 0.304, 0.487, 0.287, and 0.244 m3 of biogas per m3 of digester volume per day (m3/m3d), respectively. It was concluded that the highest average biogas production of 0.487 m3/m3d is attained at total solids of 8%.enMasinde Muliro University of Science and TechnologyArticle