US 12,134,575 B2
Treatment method and device for dehydration of organic sludges
Patrice Capeau, Marseilles (FR); and Pascal Gendrot, Le Vesinet (FR)
Assigned to Orege, Voisins-le-Bretonneux (FR)
Appl. No. 17/059,601
Filed by Orege, Voisins-le-Bretonneux (FR)
PCT Filed May 29, 2019, PCT No. PCT/EP2019/064113
§ 371(c)(1), (2) Date Nov. 30, 2020,
PCT Pub. No. WO2019/229196, PCT Pub. Date Dec. 5, 2019.
Claims priority of application No. 1854796 (FR), filed on Jun. 1, 2018.
Prior Publication US 2021/0221725 A1, Jul. 22, 2021
Int. Cl. C02F 11/147 (2019.01); C02F 9/00 (2023.01); C02F 1/00 (2023.01); C02F 1/20 (2023.01); C02F 1/24 (2023.01); C02F 11/06 (2006.01); C02F 11/122 (2019.01); C02F 11/126 (2019.01)
CPC C02F 11/147 (2019.01) [C02F 9/00 (2013.01); C02F 2001/007 (2013.01); C02F 1/20 (2013.01); C02F 1/24 (2013.01); C02F 11/06 (2013.01); C02F 11/122 (2013.01); C02F 11/126 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for continuous or semi-continuous treatment/dehydration of organic sludge, comprising:
introducing a flocculant having polymer molecules into a three-phase emulsion in order to create a bacterial floc in an aerated state, wherein the three-phase emulsion comprises air, solid material and water, wherein the three-phase emulsion was produced by injecting the air into the organic sludge, wherein the bacterial floc in the aerated state comprises flakes of particles of sludge aggregated in a current of the air and/or mixed with a large number of bubbles of the air;
introducing, via a pipe connected to a separate and open maturation/degasser container, the bacterial floc in the aerated state to a pool comprising previously-introduced bacterial floc situated in a lower portion of the open maturation/degasser container, wherein:
the pool comprises a surface at an interface between the pool and a layer of air, at atmospheric pressure, that is situated over the pool in an upper portion of the maturation/degasser container that is vented to the atmosphere,
the bacterial floc is introduced via a neck extending from the pipe and vertically upward through the pool, and
the bacterial floc flows, from an outlet of the neck, above the surface to form a fountain and falls, via gravity, onto the previously-introduced bacterial floc,
causing maturation and degassing of the bacterial floc, in the open maturation/degasser container and at the atmospheric pressure, by maintaining the bacterial floc within the open maturation/degasser container for a determined time such that a compact organic macrostructure is established and can be separated from the water released from the bacterial floc, wherein:
the maturation of the bacterial floc at the atmospheric pressure includes stable and strong fixation of the polymer molecules on the bacterial floc, and
the degassing of the bacterial floc at the atmospheric pressure is caused by soft impact of the bacterial floc on the previously-introduced bacterial floc within the open maturation/degasser container as the bacterial floc falls onto the previously-introduced bacterial floc; and
after the maturation and the degassing of the bacterial floc, discharging the bacterial floc into a filtration and/or decantation device.