Dioxins and Recycling of Resources-I Fundamental Studies on Recovery of Resources and Energy in Consideration of Dioxins Formation

摘要

At present in Japan, there are a large amount of industrial wastes which include many kind of plastic products, a great amount of ASR (Automobile Shredder Rubbish), many used transformers containing toxic polychlorinated biphenyl (PCB), and a large amount of poly vinyl chloride (PVC) products and so on. Furthermore, the exhaust gas from municipal waste incinerator has a great quantity of energy. Therefore, the safe recovery of resources and energy from industrial wastes and municipal and/or industrial waste incinerators is very important subjects with no dioxins/furans (Dioxins) formation in sufficient consideration of the environment and also will be able to contribute to the suppression of CO_2 emission. It is very important assignments to exactly elucidate the mechanism of Dioxins formation in incineration processes and to more investigate the critical temperature at which Dioxins formation becomes remarkable in cooling processes of an exhaust gas having little Dioxin's concentration. The recovery of resources and energy can be effectively realized when those assignments are solved. This report introduces the present countermeasures and the remaining subjects in Japan for Dioxins emission and fundamental studies in Osaka University with the aim of no Dioxins formation.