The rise of the energy consumption of developing countries increases the carbon dioxide emission through to the atmosphere that causes global warming. The releasing of the carbon dioxide into theatmosphere is needed to be under control and sustainable because of the natural disaster appearing depending on the global warming that affects human life negatively. Therefore, the investigation of alternative resources is an under obligation instead of fossil-based fuels. The biogas production is one of the methods in alternative fuel manufacturing such as biodiesel, wind power and etc. The mixture of gases %35-45 CO2, %55-65 CH4 are produced with trace amount of other gases CO, H2S, NH3 by using
suitable organic wastes after digestion. In this study, the amount of phenolic compound, nitrogen (N), phosphorus (P2O5), potassium (K2O), pH, Humic and Fulvic acid, conductivity properties were investigated in liquid phase before and after digestion. According to obtained results, there are any differences for the amount of N, P, K, while the value of the pH increases after digestion and the amount of the total carbon, Humic and Fulvic acid, the phenolic compounds and conductivity increases after digestion.