The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 26, 1978
Filed:
Oct. 19, 1976
Applicant:
Inventor:
Jacques Tardivel, Plaisir, FR;
Assignee:
Degremont, Rueil-Malmaison, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210 83 ; 210 / ;
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.