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:
Apr. 16, 2002
Filed:
Nov. 06, 2000
Applicant:
Inventors:
Leonard Hubertus Alphonsus Habets, Sneek, NL;
Ronald Mulder, Alkmaar, NL;
Assignee:
Paques Water Systems B.V., Balk, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C02F 3/30 ;
U.S. Cl.
CPC ...
C02F 3/30 ;
Abstract
A method for the treatment of process water or effluent from a papermaking process, in which this water is subjected to at least one anaerobic purification step, an aeration step and a solids separation step and the water is then returned to the production process, and at least two treated water streams of different quality, which originate from a different combination of purification steps, are returned to different points in the production process.