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:
Oct. 31, 2017
Filed:
Sep. 23, 2013
Applicant:
D.c. Water & Sewer Authority, Washington, DC (US);
Inventors:
Sudhir N. Murthy, Herndon, VA (US);
Eugenio Giraldo, Robbinsville, NJ (US);
Norman D. Dockett, Silver Spring, MD (US);
Walter F. Bailey, Washington, DC (US);
Assignee:
D.C. Water & Sewer Authority, Washington, DC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 3/00 (2006.01); C02F 3/12 (2006.01); B01D 36/00 (2006.01); C02F 3/28 (2006.01); C02F 3/30 (2006.01);
U.S. Cl.
CPC ...
C02F 3/00 (2013.01); B01D 36/00 (2013.01); C02F 3/006 (2013.01); C02F 3/12 (2013.01); C02F 3/1205 (2013.01); C02F 3/1236 (2013.01); C02F 3/2866 (2013.01); C02F 3/1221 (2013.01); C02F 3/1226 (2013.01); C02F 3/307 (2013.01); C02F 2209/005 (2013.01); C02F 2209/10 (2013.01); C02F 2209/105 (2013.01); C02F 2303/24 (2013.01); Y02E 50/343 (2013.01); Y02W 10/15 (2015.05);
Abstract
An apparatus and method for selecting and retaining solids in an activated sludge process for the improving wastewater treatment using screens. The screens can be used to separate and retain solids based on size or compressibility. The screens are used to separate and select for slow growing organisms, faster settling organisms, or materials added to absorb, treat or remove constituents in the activated sludge process.