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:
Feb. 18, 2014
Filed:
Aug. 17, 2009
Applicants:
Fufang Zha, West Ryde, AU;
Zhiyi Cao, Lidcombe, AU;
Inventors:
Fufang Zha, West Ryde, AU;
Zhiyi Cao, Lidcombe, AU;
Assignee:
Siemens Water Technologies LLC, Alpharetta, GA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 65/02 (2006.01); B01D 61/20 (2006.01); B01D 61/22 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of backwashing a membrane filtration system comprising at least one permeable membrane, preferably a hollow fiber membrane, the method comprising the step of applying a pressurized gas at a variable pressure to permeate remaining present in the system when filtration process is stopped or suspended to provide liquid for backwashing pores of the permeable membrane during a backwashing process. Also provided are methods of filtering solids from a liquid suspension using alternating liquid backwash pressures.