Patent ID: 8268172

Claim:
A waste fluid treating apparatus comprising: a waste fluid tank for storing a waste fluid generated from a process fluid supplied in processing by a processing apparatus; a waste fluid pump for sending said waste fluid stored in said waste fluid tank; waste fluid filtering means for filtering said waste fluid sent by said waste fluid pump to obtain a fresh water; a fresh water tank for storing said fresh water obtained by said waste fluid filtering means; a fresh water pump for sending said fresh water stored in said fresh water tank; and pure water generating means including an ion exchanger for purifying said fresh water sent by said fresh water pump to obtain a pure water; said ion exchanger comprising a housing, an anion exchange resin layer accommodated in said housing, and a mixed resin layer accommodated in said housing, said anion exchange resin layer being composed of only anion exchange resin, said mixed resin layer being composed of a mixture of anion exchange resin and cation exchange resin; said housing being provided with fresh water inlet means for introducing said fresh water into said anion exchange resin layer and pure water outlet means for discharging said pure water from said mixed resin layer.