• In this project, we reduce the costs of energy production via anaerobic digestion by utilizing exhaust heat from a factory, which resulted in a positive energy balance, although the methane fermentation system tested was on a small scale.
• Using small-scale methane fermentation with a positive energy balance, the initial investment is small, enabling a company to invest in, and install, such a system. This would decentralize energy production within an area. Moreover, this system not only produces energy, but is a basis for resource recycling.

Food factory, hotel, restaurant, where food garbage or organic waste was produced much.