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:
Jun. 25, 1991
Filed:
Oct. 30, 1989
David F James, Hornchurch, GB;
Thames Water Utilities Limited, Reading, GB;
Abstract
The invention relates to an automatic apparatus, computer controlled, for monitoring the settlement of solids in a liquid, specifically sludge in effluent from a sewage treatment plant. The apparatus enables the determination of the parameter known as the Stirred Specific Volume Index (SSVI) of the sludge. The apparatus includes a standard cylindrical vessel for receiving the sludge, and opposed banks of the LEDs and sensors which monitor the settlement height of the sludge as it settles in the liquid. Stirring is effected by an eccentric stirrer controlled by a Hall Effect device and the output from the sensors is fed to an electronic circuit fed by a computer for providing a determination of SSVI and hence control of a sewage works.