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:
Sep. 30, 1986
Filed:
Mar. 29, 1985
Applicant:
Inventors:
Per-Erik Andersson, Sundsvall, SE;
Thomas G Welander, Malmo, SE;
Assignee:
Purac Aktiebolag, Lund, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
210603 ; 210631 ; 210928 ; 435167 ; 4819 / ;
Abstract
At anaerobic treatment of wastewaters from forestry industries there is the problem, that the wastewaters contain toxically acting complexing agents. According to the invention this problem is solved by the addition of a metal selected from the group iron, calcium, magnesium and aluminum.