T. Aramaki et al., Evaluation of appropriate system for reclaimed wastewater reuse in each area of Tokyo using GIS-based water balance model, WATER SCI T, 43(5), 2001, pp. 301-308
The appropriate type of reclaimed wastewater reuse system in each area of T
okyo was evaluated from the aspect of economic efficiency, using a GIS-base
d water balances model. The following four reclaimed wastewater reuse syste
ms and conventional waterworks and sewerage system were evaluated; "Rain wa
ter storage and use system", "Onsite wastewater treatment and reuse system"
, "Sewage treatment and reuse at an intermediate point on the sewer pipe" a
nd "Treated water supply system in sewage treatment plant". In the case tha
t we install them to office and residential buildings, the supplied volume
by reclaimed wastewater reuse systems is 693 thousands m(3)/d, this corresp
onds to 15% of total water demand in the area. Furthermore, the effects of
the following scenarios brought about by technological innovation in water
treatment were investigated; the case that flush water in toilet and wastew
ater from kitchen are also available as source in a "onsite wastewater trea
tment and reuse system" and the case that reclaimed water is used for laund
ering in residential buildings. When reclaimed water is used for laundering
in residential buildings, the supplied volume by these systems increases t
o 814 thousand m(3)/d in the case that these systems are installed to offic
e and residential buildings.