Method and means for the automatic regulation of sludge extracti

Details Method and means for the automatic regulation of sludge extracti Method and means for the automatic regulation of sludge extracti

1976-10-19

1978-09-26

Adee, John

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 96R, B01D 2124

Patent

active

041168321

ABSTRACT:
Two samples of water are taken at two predetermined levels from a variable turbidity region disposed just below the sludge bed of a sewage treatment apparatus. The samples are alternately fed to a constant-level vessel whereat the turbidity variation between the samples is measured. The rate and duration of the sludge extraction operation are controlled as a function of such turbidity variation.

REFERENCES:
patent: 1957898 (1934-05-01), Mitchell
patent: 3280975 (1966-10-01), Evans
patent: 3618766 (1971-11-01), Morey
patent: 3878094 (1975-04-01), Conley et al.
patent: 3979290 (1976-09-01), Lofflet

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