To provide a water quality-controlling system for wastewater treatment facilities, which decreases undesirable effects caused by returning water, to a water treatment system of such wastewater treatment facilities.
This water quality-controlling system for wastewater treatment facilities is a system for controlling quality of wastewater of wastewater treatment facilities characterized in that wastewater is treated at a wastewater processing section (51) and resulted sludge is dehydrated by a dehydrator (14) at a sludge treatment section (52) and returning water created by the dehydrator is returned to the wastewater processing section, and is equipped with a means for water quality measurement for measuring water quality (22) and a means 25 for controlling, based on obtained results from the measuring, whereby sludge concentration in the returning water is controlled to remain within an acceptable concentration.
TSUTSUMI MASAHIKO
YAMANAKA OSAMU
HATSUKA YUKIO
