US 12,338,146 B2
Wastewater treatment system and method for producing sludge for cement manufacturing
William Paul, Bucyrus, KS (US)
Assigned to Alden Group Environmental Solutions, LLC, The Woodlands, TX (US)
Filed by Alden Group Environmental Solutions, LLC, The Woodlands, TX (US)
Filed on Jul. 31, 2020, as Appl. No. 16/944,673.
Claims priority of provisional application 62/880,823, filed on Jul. 31, 2019.
Prior Publication US 2021/0032132 A1, Feb. 4, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C02F 1/52 (2023.01); C02F 1/66 (2023.01); C02F 11/145 (2019.01); C04B 7/44 (2006.01); C02F 101/20 (2006.01)
CPC C02F 1/52 (2013.01) [C02F 1/66 (2013.01); C02F 11/145 (2019.01); C04B 7/4423 (2013.01); C02F 2101/203 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for producing sludge, comprising:
combining wastewater and at least one primary treatment chemical to form a liquid phase and a solid phase, wherein the liquid phase comprises clean water and the solid phase comprises a sludge byproduct;
separating the liquid phase from the solid phase;
combining the solid phase with at least one secondary treatment chemical to form an intermediate, the intermediate comprising excess water; and
removing the excess water from the intermediate to form a treated sludge in a filter press, a vacuum drum, a belt press, a fan press, a band filter, a dewatering box centrifuge, a screw press, a batch tank reactor, an auto sequential batch unit, a continuous flow unit, a dissolved air flotation (DAF) unit, an induced air floatation (IAF) round, a rectangle gravity clarifier, a thickener, and/or an angle plate lamella clarifier.