US 11,897,823 B2
Production of nitrogenous fertilizer from wastewater
Edward Rosenthal, Sarasota, FL (US); and Griffith Lunn, Titusville, FL (US)
Assigned to PWG LLC, Sarasota, FL (US)
Filed by PWG LLC, Sarasota, FL (US)
Filed on Oct. 7, 2022, as Appl. No. 17/962,455.
Claims priority of provisional application 63/278,294, filed on Nov. 11, 2021.
Prior Publication US 2023/0145712 A1, May 11, 2023
Int. Cl. C05C 3/00 (2006.01); C05G 5/35 (2020.01); C05G 5/30 (2020.01); C02F 1/20 (2023.01); C02F 1/66 (2023.01); C02F 1/02 (2023.01); C05F 7/00 (2006.01); C02F 101/16 (2006.01)
CPC C05C 3/005 (2013.01) [C02F 1/02 (2013.01); C02F 1/20 (2013.01); C02F 1/66 (2013.01); C05F 7/00 (2013.01); C05G 5/35 (2020.02); C05G 5/38 (2020.02); C02F 2101/16 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method of obtaining a granulated nitrogen-containing encapsulated fertilizer product from wastewater, wherein the method comprises an ammonia capture and recovery system comprising five method steps, wherein the method steps include an ammonia removal step to produce a stream comprising a gas with entrained ammonia and water, an ammonia recovery step producing an ammonium salt by addition of a mineral acid to the gas with entrained ammonia and water, a granulation step of the ammonium salt forming a granulated product, a granulated product wax-coating step, and a granulated product encapsulation step.