Abstract
Collection system of garbage into the sewage treatment plant for anaerobic co-digestion was investigated by a questioner survey in Kanazawa city and Nakanoto town. The results of conjoint analysis of kitchen garbage discharge to the collection site showed that "degree of the garbage separation" was a most important factor for discharge, and "recycling fee" was the next factor. On the other hand, "collection frequency" was a small or minor detail. Frequent collection might not be useful for garbage separation by all citizens. A new recycling system, in which each citizen with environmental awareness brought the separated garbage into a supermarket by themselves, was proposed, and the effects of the system was examined. About 60% of citizen estimated to bring the garbage by receiving benefit in the supermarket.
