To provide a recycling treatment technique of car washed waste water which is effective for obtaining treated water having water quality suitable for washing water when car washed waste water discharged from a car washer is received, is treated and then the treated water is supplied to the car washer as recycled washing water.
A recycling treating apparatus 100 has a pressure floatation device 110, a biological treatment device 130, a recycling water tank 150 or the like. In the pressure floatation device 110, the car washed waste water discharged from the car washer 300 is pressurized together with air and then is ejected to a low pressure region and floated material (froth) appeared in the low pressure region is removed. In the biological treatment device 130, primary treated water obtained by the pressure floatation device 110 is further aerobically decomposed by using aerobic microorganisms. Secondary treated water obtained by the biological treatment device 130 is once stored in the recycling water tank 150 and then is recycled to the car washer 300 as the washing water.
COPYRIGHT: (C)2004,JPO
Shingo Nagamine
Koichi Matsuo
Sayuri Fujita
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Tetsuo Fukuda
Atsuko Nakamura