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:
Dec. 29, 1992
Filed:
Mar. 06, 1992
Applicant:
Inventors:
Otto Stuckmann, Recklinghausen, DE;
Peter Hombach, Essen, DE;
Wolfgang Ruger, Sprockhovel, DE;
Karl Grosse, Wetter, DE;
Wolfgang Leiner, Bochum, DE;
Winfried Schmidt, Munster, DE;
Reinhard Diekmann, Witten, DE;
Assignee:
Parkner GmbH, Recklinghausen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C02F / ; C02F / ;
U.S. Cl.
CPC ...
210609 ; 210622 ; 210630 ; 210631 ; 210669 ; 210804 ;
Abstract
A paint sludge is subjected to aerobic biodegradation with increased dry content of the resulting sludge and the latter is then subjected to anaerobic biological degradation. The effluent from the two biostages are sterilized by ozonization, UV-irradiation or peroxide addition. The sludge from the anaerobic biostage can be dried to an inert granulate and drying vapors are recycled to the aerobic biostage. The sterile liquid is returned to the wash water circulation of the painting plant.