Patent ID: 8518267
Filing Date: 2013-08-27
Classification: C02F,C08B,C08F,C08L

Abstract:
1. A method of reducing the COD of an aqueous medium containing a COD level of >200 ppm based upon 1 million parts of said aqueous medium, said method comprising adding to said aqueous medium an effective amount of coagulant chitosan/(meth)acrylyloxy alkyl quaternary ammonium salt graft polymer (C/MAOA Quat), said aqueous medium having an anionic surfactant level of greater than 50 ppm therein and said aqueous medium comprising a wastewater selected from the group consisting of laundry, dishwashing, textile manufacturing, metal cleaning, and degreasing wastewaters, said C/MAOA Quat being chloride free and having a viscosity of from about 100 cps to about 3,000 cps.