Natural gas, biogas and alcohols are alternative fuels for spark ignition engines which can be used for reducing exhaust emissions and improving performance metrics. At the first stage of the study, a pilot scale biogas system was built, and biogas was produced from a mixture of manure and water called slurry, consisting of 40% cattle manure, 35% water, 17% whey and 8% poultry manure by co-fermentation method. Scrubbing and desulfurization were applied to remove the harmful gasses (CO₂, H₂S) from the produced biogas in two stages. In the end of the purification process, biogas with a CH₄ content of 51%, 57% and 87% was produced. In the second stage, these biogas fuels were used in an SI engine, and their impacts on performance and combustion characteristics were investigated experimentally. A 4-cylinder, 4-stroke, water cooled SI engine with an 11:1 compression ratio was used in the experiments. Tests were conducted at various loads and constant speed. Results showed that daily amount of mean biogas production has reached 1.6 m³/day and biogas methane content has reached 72%. In engine tests, as the methane ratio in biogas increases, cylinder pressure and exhaust temperature values increase and brake specific fuel consumption decreases.

天然气、沼气和酒精是火花点火发动机的替代燃料，可用于减少废气排放和提高性能指标。在研究的第一阶段，建立了一个中试规模的沼气系统，沼气是由粪便和水的混合物制成的，称为浆液，由 40% 的牛粪、35% 的水、17% 的乳清和 8% 的家禽粪便组成。共发酵法。应用洗涤和脱硫从两个阶段去除产生的沼气中的有害气体（CO ₂、H ₂ S）。在净化过程结束时，带有 CH _{4 的}沼气产生了 51%、57% 和 87% 的含量。在第二阶段，这些沼气燃料用于 SI 发动机，并通过实验研究了它们对性能和燃烧特性的影响。实验中使用了压缩比为 11:1 的 4 缸、4 冲程、水冷 SI 发动机。测试是在各种负载和恒定速度下进行的。结果表明，日均产沼气量已达到1.6 m ³ /day，沼气甲烷含量达到72%。在发动机测试中，随着沼气中甲烷比例的增加，气缸压力和排气温度值增加，制动比燃料消耗降低。