ABSTRACT
Decentralized wastewater reuse system means that wastewater is collected and transferred to a plant on site, and then the reclaimed water is reused close to the plant. The main uses for reclaimed water are in urban domestic applications, such as toilet flushing, green irrigation or industrial cooling water. Started in the 1950s, decentralized wastewater reuse for domestic application in cities has been well developed in Japan thanks to promotion and investment by the government (Yamagata et al. 2003). Similarly, the government promoted and subsidized the decentralized wastewater reuse system in Beijing in 1980s. The Beijing government subsidizes investment of buildings and equipment. As mentioned in section 1.3.3 of Chapter 1, the Beijing government issued The Regulation of Building Decentralized Wastewater Reclamation Systems in Beijing, requiring large organizations to build their own wastewater reuse systems. Therefore a substantial number of decentralized wastewater reuse systems have appeared urban areas of Beijing.
