US 12,319,602 B1
Method and apparatus for treatment of an animal processing wastewater stream
Scott Frazier, Frisco, TX (US); and Jon Khachaturian, New Orleans, LA (US)
Assigned to JP STILTSIN, LLC, Colorado Springs, CO (US)
Filed by JP STILTSKIN, LLC, Colorado Springs, CO (US)
Filed on Dec. 4, 2023, as Appl. No. 18/527,784.
Application 18/527,784 is a continuation of application No. 16/924,751, filed on Jul. 9, 2020, granted, now 11,858,840.
Claims priority of provisional application 62/872,162, filed on Jul. 9, 2019.
This patent is subject to a terminal disclaimer.
Int. Cl. C02F 9/00 (2023.01); C02F 1/24 (2023.01); C02F 1/56 (2023.01); C02F 1/66 (2023.01); C02F 1/68 (2023.01); C02F 103/22 (2006.01)
CPC C02F 9/00 (2013.01) [C02F 1/24 (2013.01); C02F 1/56 (2013.01); C02F 1/66 (2013.01); C02F 1/68 (2013.01); C02F 2103/22 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of treating an animal processing wastewater stream including lipids and protein solids, the method comprising:
acidifying the wastewater stream;
adding a density modifier to the wastewater stream, said density modifier including one or more of lanthanum, cerium, or praseodymium and salts thereof;
adding a cationic polymer to the wastewater stream at a concentration between 5 and 50 mg/L;
adding an anionic polymer to the wastewater stream; and
separating density modified floating material that includes protein solids from the wastewater stream.