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:
Jul. 07, 2020
Filed:
Apr. 07, 2017
Applicant:
Kemira Oyj, Helsinki, FI;
Inventors:
Joonas Likander, Espoo, FI;
Sakari Halttunen, Espoo, FI;
Outi Grönfors, Espo, FI;
Bengt Hansen, Ramlösa, SE;
Assignee:
Kemira Oyj, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 11/14 (2019.01); C02F 1/52 (2006.01); C02F 1/56 (2006.01); C02F 3/28 (2006.01); C02F 1/00 (2006.01); C02F 11/04 (2006.01); C02F 1/38 (2006.01); C02F 11/147 (2019.01); C02F 11/143 (2019.01);
U.S. Cl.
CPC ...
C02F 11/147 (2019.01); C02F 1/004 (2013.01); C02F 1/5236 (2013.01); C02F 1/56 (2013.01); C02F 3/28 (2013.01); C02F 11/04 (2013.01); C02F 11/143 (2019.01); C02F 1/38 (2013.01); C02F 2209/10 (2013.01); C02F 2303/10 (2013.01); Y02E 50/343 (2013.01);
Abstract
The present invention relates to a process for treating primary sludge in a wastewater treatment plant, comprising the steps of admixing an organic coagulant and/or polymer to wastewater; allowing a primary treatment of the wastewater in the presence of the organic coagulant or polymer; separating solids as a primary sludge from said primary treatment; and dewatering the primary sludge. The present invention further relates to a method of improving primary sludge dewaterability and improving energy balance of a wastewater treatment plant.