Patent ID: 11858840
Assignee: JP STILTSKIN, LLC
Field: Environmental technology (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method of treating an animal processing wastewater stream which includes lipids and protein solids, the method comprising:
a) providing a first stage that acidifies the wastewater stream, wherein the wastewater stream pH is adjusted to a value in the range of 4.8-5.2;
b) adding a density modifier to the wastewater stream, said density modifier including lanthanum, cerium, or praseodymium salts or a combination thereof at a dosage rate in the range of 10-1000 milligrams per liter;
c) adding a cationic polymer to the wastewater stream;
d) adding an anionic polymer to the wastewater stream; and
e) separating density modified floating material that includes protein solids from the wastewater stream with one or more dissolved air flotation units.