2011.4-2012.3 Yearbook of NILIM
Research Summary


Water Quality Control Department

Reference Number Y110206
Title Quantitative Effect of Water Reuse as a Global Warming Control Measure
Start-End Date 2008.4-2012.3
Division Wastewater and Sludge Management Division
Author Head, Masashi OGOSHI
Researcher, Ayako MIYAMOTO
Researcher, Shunsuke NISHIMURA
Summary Water reuse has been practiced because it is recognised as reliable source and as countermeasure for climate change. We estimated the CO2 emission from the wastewater treatment and distribution processes and LCCO2 of area-wide water recycle system and the water circulation system in individual building to help promote the water reuse.
Agricultural use and groundwater recharge are the major applications of wastewater reuse. However, management systems of those uses have not yet been established. We investigate the appropriate indicator to evaluate the impact of groundwater recharge with treated wastewater on the recharged aquifer. The results show that carbamazepine and ƒÂ15N can be the indicators which show the influenced area and the ratio of the reclaimed water to groundwater of each point.