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. 16, 2010
Filed:
Oct. 25, 2006
Sudhir N. Murthy, Washington, DC (US);
John T. Novak, Blacksburg, VA (US);
Walter F. Bailey, Jr., Washington, DC (US);
Glen T. Daigger, Parker, CO (US);
Perry Schafer, Sacramento, CA (US);
Christopher Peot, Washington, DC (US);
Sudhir N. Murthy, Washington, DC (US);
John T. Novak, Blacksburg, VA (US);
Walter F. Bailey, Jr., Washington, DC (US);
Glen T. Daigger, Parker, CO (US);
Perry Schafer, Sacramento, CA (US);
Christopher Peot, Washington, DC (US);
D.C. Water & Sewer Authority, Washington, DC (US);
Abstract
An improved process for sludge treatment includes anaerobic digestion followed by post-mesophilic aerobic and/or anoxic digestion. The first anaerobic step may be performed under either mesophilic or thermophilic conditions. The subsequent aerobic/anoxic digestion may be performed using either simultaneous, sequential or pulsed aerobic and anoxic conditions. An apparatus for performing the improved sludge treatment may be one digester for performing the anaerobic followed by aerobic/anoxic digestion. Alternatively, the system for performing the improved sludge treatment techniques may be at least two digest reactors.