Evaluation of the productivity of biogas from cow manure, vegetables, fruits, and paper waste for operating SI engines

In this research, the design of a low-cost modified anaerobic digester that contributes to improving biogas production in cold winter climates has been investigated. A laboratory biogas production plant consists of two anaerobic fermentation systems has been constricted, the first is conventional and the other is modified. Tests and measurements were carried out on the station in the current study to reveal the productivity of the modified design and the influence of the different operating conditions. It was noted that the productivity of the three modified tanks has always been higher than conventional during the 45 days. It is also found that on March 1, 2022, the highest values of the intensity of solar radiation and the ambient air temperature were recorded compared to the rest of the months, where they recorded 1059 W/m2 and 27.17 respectively. Fuel engine tests showed that the maximum engine brake power and thermal brake efficiency were found to be 2620 W and 34% with gasoline fuel at an engine speed of 3000 rpm and 2000 rpm respectively. The obtained engine test results reveal that the produced biogas can be produced locally from other wastes and used to operate gasoline engines.