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:
Nov. 05, 2019
Filed:
Apr. 04, 2016
Applicant:
D.c. Water & Sewer Authority, Washington, DC (US);
Inventors:
Assignee:
D.C. Water & Sewer Authority, Washington, DC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 3/30 (2006.01); C02F 3/12 (2006.01); C02F 1/52 (2006.01);
U.S. Cl.
CPC ...
C02F 3/1221 (2013.01); C02F 3/307 (2013.01); C02F 1/52 (2013.01); C02F 3/1226 (2013.01); C02F 2209/10 (2013.01); C02F 2209/105 (2013.01); C02F 2303/24 (2013.01); Y02W 10/15 (2015.05);
Abstract
An apparatus and method for selecting, retaining or bioaugmenting solids in an activated sludge process for improving wastewater treatment using a screen device. If desired, the screen device may include a drum, and the rotating speed of the drum may be used to control the solids retained. Effluent including waste biomass may exit the screen device. No other discharge unit from the screen device may be required.