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. 21, 2008
Filed:
Jul. 26, 2004
Applicants:
Lnsp Nagghappan, Pittsburgh, PA (US);
Robert P. Helwick, Mckees Rocks, PA (US);
Inventors:
Lnsp Nagghappan, Pittsburgh, PA (US);
Robert P. Helwick, Mckees Rocks, PA (US);
Assignee:
OTU SA, , FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 61/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A wastewater treatment system comprising separation unit operations inhibits or promotes the formation and precipitation of species by controlling the pH of wastewater to be treated entering into the separation unit operations. The separation unit operations include first and second reverse osmosis devices. The first reverse osmosis device treats wastewater having pH that is less than about 3.5 and the second reverse osmosis device treats wastewater, from the first reverse osmosis device, having a pH that is about 6 or higher.