Abstract
A gas hydrate technology has been applied to the purification of bio-gas produced from sludge digestion tanks in a sewage treatment center. In this system, methane in the bio-gas is concentrated to more than 95% and is stored in the form of methane hydrate. It is possible for facilities with the biogas hydrate system to utilize the purified methane as fuel and the heat of the hydrate dissociation as coolant. Demand side managements of energy are expected to be realized by introducing gas hydrate systems in many facilities with bio gas-plans.
