Abstract
Japan has started water reuse projects since 1980 to promote effective utilization of water resources by the national and local governments. However, 1% of total discharge of municipal sewage treatment plants is reused outside of the plants at the present. There are many challenges such as safety evaluation, lowering energy consumption and cost, and public acceptance to overcome in promotion of water reuse. Therefore, we carried out JST CREST project “Development and Evaluation of Water Reuse Technologies for the Establishment of 21st Century Type Water Cycle System.” We also performed demonstration project to verify wastewater reclamation system by MLIT B–DASH Project in Itoman City, Okinawa based on our research achievement of the JST CREST project. Okinawa Prefecture Government and Itoman City also performed investigations to install the water reuse projects for multipurpose applications. These recent situation is described in this article.
