11. Proposal of a New Water Recycling System Featuring “Water Reclamation and Reuse”

Recently, the development of a stable water supply that responds to increasing water demand has been difficult because the spatial-temporal unfair distribution of water resources in the world has expanded due to climate change. Therefore, in regions with a water shortage, it is becoming more and more important to reclaim and reuse water. In this chapter, we first introduce our interdisciplinary research project that has been focused on water reclamation/reuse. The project consisted of four groups: “Reclamation and Recycle Group,” “Material Recycle Group,” “Green Space Creation Group,” and “Management and Policy Group.” Then, we introduce the concept of greywater for water reclamation/reuse and show the characteristics of greywater quality in general households of semi-urban regions in Thailand, experimental results from laboratory scale experiments, and acceptance of treated greywater from residents in three Asian countries. Additionally, we show the current situation of rainwater and reclaimed water uses in university campuses and propose a new strategy regarding eco-houses of the future.