Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2006-11-09
2008-11-25
Barry, Chester T. (Department: 1797)
Liquid purification or separation
Processes
Treatment by living organism
C210S150000, C210S220000, C073S863830
Reexamination Certificate
active
07455775
ABSTRACT:
It is an object of the invention to provide an effective technique for detecting the quality of water with high accuracy. A representative water treatment apparatus includes an aerobic treatment region that treats water aerobically, a downstream region in which the water aerobically treated in the aerobic treatment region flows, a water quality sensor that is submerged in the downstream region and detects the water quality and a sensor washing arrangement that washes the water quality sensor by supplying the water of the downstream region to the water quality sensor at a flow rate higher than water flowing around the water quality sensor. As a result, sludge generated due to aerobic treatment can be prevented from being deposited on the water quality sensor and/or deposited sludge can be removed, so that the accuracy of water quality detection of the water quality sensor can be enhanced.
REFERENCES:
patent: 4517849 (1985-05-01), Nakahori et al.
patent: 03052696 (1991-03-01), None
Doi Yukio
Iwama Toshiyuki
Kurokawa Hayato
Suzuki Eiichi
Tabata Yosuke
Barry Chester T.
Dennison, Schultz & MacDonald
Fuji Clean Co., Ltd.
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