Small Scale Biogas Production by using Food Waste- Examples from three Restaurants  

Global warming is the one of the most dangerous threats that the entire world is facing today. The emission of greenhouse gases is increasing the impact of global warming. In such a situation, reduction of GHG emissions and finding an alternative source of energy is more and more important. The production of biogas from food wastes is considered as a suitable way for the reduction of GHGs emission. The production of this type of renewable energy is very popular in Asian countries, especially in countries like India and China. Biogas production never creates any harmful effects to the environment but at the same time it also produces byproducts that are not harmful for the environment. This study tries to investigate the possibility for the production of biogas from food wastes in restaurants under Swedish conditions. In order to do so, three different models of biogas plants in three different restaurants were used as a case study. The results showed that biogas production from food waste in restaurants are practically possible in Sweden and it can be used as an alternative source of cooking fuel with many benefits both economically and environmentally. Temperature problems in Sweden during winter season can be avoided by using pre-heating technique.