Study on sewage sludge gasification
Aimed at creating new technology to reduct greenhouse gas emission, the Tokyo Bureau of Sewerage has developed a system generating electricity with a gas engine using biogas generated by pyrolytic gasification of sewage sludge in a fluidized-bed gasifier. A 15t/d demonstration facility was built based on a dehydrated sludge and demonstration tests were run for 3400 hours from 2005. As a result of the use of the present system as an alternative to the sewage sludge incineration system of the past it is possible to more than halve the greenhouse gas volume emitted from the sewage treatment plant. This holds promise of a very major emission reduction and energy saving effect.