CONTROLLNG METHOD OF CONCENTRATING VESSEL BY MEASUREMENT OF OXIDATION-REDUCTION POTENTIAL

Japanese Patent JPS5943414

A

PURPOSE:To improve the quality of supernatant liquid and the ability in sludge dehydration by detecting how much the sludge in a concentration vessel is concentrated through a sensor, and inputting the detection data to a computer and controlling the detention time of the sludge in the concentration vessel to an optimum time. CONSTITUTION:A sludge supply pump 21 supplies inflow sludge 2 to the concentration vessel 1. Further, a sludge drawing-out pump 5 draws the concentrated sludge 3 out. Those pumps 21 and 5 are controlled through a computer 26 by the signal from a sensor 25 which is always set in the concentrated sludge in the concentration vessel 1. This computer 26 stores relation characteristcs (graph) between the previously found oxidation-reduction potential of the sludge and sludge staying time. A corrected oxidation-reduction potential measured value is found from output values of the sensor 25 such as the oxidation-reduction potential, temperature, pH, etc., of the sludge and an estimated sludge staying time and further a limit sludge staying time are calculated from the measured value and said stored relation characteristics, and consequently a sludge supply speed and a sludge drawing-out speed are controlled.

JP2001033412	ADSORPTION AMOUNT SENSOR
WO2001042473	DEVICE AND METHOD FOR ACCELERATED HYDRATION OF DRY CHEMICAL SENSORS

HORIUCHI KOUICHI
OZAWA KENJIYU

JP15424882A

March 10, 1984

September 03, 1982

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MITSUBISHI ELECTRIC CORP

G01N27/26; G05D21/00; G05D21/02; (IPC1-7): G01N27/26; G05D21/00

JPS5759607A	1982-04-10
JPS5564896A	1980-05-15
JPS5422955A	1979-02-21
JPS5071164A	1975-06-12
JPS49104460A	1974-10-03

Masuo Oiwa

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