Patent ID: 6177005
Filing Date: 2001-01-23
Classification: C02F,Y02W,Y10S

Abstract:
An ultrapure water producing system having a raw water pretreatment unit, a primary pure water producing unit and a secondary pure water producing unit,the pretreatment unit comprising:an anaerobic organic matter treatment chamber and an aerobic organic matter treatment chamber which are formed by separating a water tank by a partition wall and have their bottom portions communicated with each other,the raw water being introduced into the anaerobic organic matter treatment chamber,the anaerobic organic matter treatment chamber being provided with an underwater stirring means for forming a circulating flow in the water to be treated and stowed with retention carriers of an anaerobic microbe in a downward flow region of the circulating flow, andthe aerobic organic matter treatment chamber being provided with aerating means for forming a circulating flow in the water to be treated and stowed with retention carriers of an aerobic microbe in the downward flow region of the circulating flow.