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US 12,319,603 B2Granted
Wastewater and sludge treatment device and method
AssigneeAriel Scientific Innovations Ltd.
InventorsFaina Nakonechny, David Gurevich, Yaakov Anker, Alexander Khentov, Sergei Chefranov, Helena Tuchinsky
Life of this patent
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Abstract
Disclosed are methods and devices that are useful for processing water-including waste such as wastewater and sludge by reacting the water-including waste with an amount of ferromagnetic powder, an amount of anionic flocculant and an amount of cationic flocculant forming ferromagnetic waste particles suspended in water of the fluid waste, the ferromagnetic waste particles subsequently separated from water of the fluid waste by application of a magnetic field.
Claims32
A method of processing water-including waste comprising:
- a. providing a fluid waste including at least about 60% water by weight in a reactor;
- b. adding to said fluid waste an amount of a ferromagnetic powder;
- c. subsequent to b, adding additives to said fluid waste, said additives comprising an amount of anionic flocculant and an amount of cationic flocculant thereby forming ferromagnetic waste particles suspended in water of said fluid waste, said ferromagnetic waste particles comprising solid components of said fluid waste, ferromagnetic particles of said ferromagnetic powder and said flocculants;
- and
- d. subsequent to c, transferring said fluid waste with said ferromagnetic waste particles to a magnetic separator and therein separating said ferromagnetic waste particles from said fluid waste by application of a magnetic field that attracts said ferromagnetic waste particles, thereby yielding a solid ferromagnetic waste material and a liquid wastewater supernatant comprising not more than 3% (w/v) suspended solids,
- further comprising:
- reducing the average particle size of said ferromagnetic waste particles, during at least one stage selected from the group of stages consisting of:
- during c,
- subsequent to c but prior to d, and
- both during c and subsequent to c but prior to d,
- wherein said reducing the average particle size of said ferromagnetic waste particles comprises applying ultrasonic waves having a frequency of not less than 25 kHz to at least a portion of said fluid waste comprising said ferromagnetic waste particles, thereby reducing the average size of said ferromagnetic waste particles.
8 more elements
A device for processing water-including waste, comprising:
- a reactor vessel with a mixing component for mixing contents of said reactor vessel;
- a fluid-waste inlet for introducing water-including waste into said reactor vessel;
- at least one reagent adder for adding a metered amount of at least one of ferromagnetic powder, anionic flocculant, cationic flocculant and coagulant into said reactor vessel;
- an outlet conduit for directing a reaction product of said water-including waste with an added reagent which reaction product includes ferromagnetic waste particles in fluid waste out of said reactor vessel;
- and
- a magnetic separator configured to:
- receive the reaction product;
- and
- to separate the ferromagnetic waste particles in the reaction product from the fluid waste by application of a magnetic field that attracts the ferromagnetic waste particles, thereby yielding a solid ferromagnetic waste material and a liquid wastewater supernatant,
- further comprising a component for reducing the average particle size of ferromagnetic waste particles by application of ultrasonic waves having a frequency of not less than 25 kHz to at least a portion of the fluid waste comprising ferromagnetic waste particles, thereby reducing the average size of the ferromagnetic waste particles.
7 more elements
A method of processing water-including waste comprising:
- a. providing a fluid waste including at least about 60% water by weight in a reactor;
- b. adding to said fluid waste an amount of a ferromagnetic powder;
- c. subsequent to b, adding additives to said fluid waste, said additives comprising an amount of anionic flocculant and an amount of cationic flocculant thereby forming ferromagnetic waste particles suspended in water of said fluid waste, said ferromagnetic waste particles comprising solid components of said fluid waste, ferromagnetic particles of said ferromagnetic powder and said flocculants;
- and
- d. subsequent to c, transferring said fluid waste with said ferromagnetic waste particles to a magnetic separator and therein separating said ferromagnetic waste particles from said fluid waste by application of a magnetic field that attracts said ferromagnetic waste particles, thereby yielding a solid ferromagnetic waste material and a liquid wastewater supernatant comprising not more than 3% (w/v) suspended solids,
- further comprising:
- reducing the average particle size of said ferromagnetic waste particles during at least one stage selected from the group of stages consisting of:
- during c but prior to d,
- subsequent to c but prior to d, and
- both during c and subsequent to c but prior to d,
- wherein said reducing the average particle size of said ferromagnetic waste particles comprises simultaneously expelling said fluid waste as two oppositely-moving streams from two mutually-facing nozzles, so as to create hydrodynamic shock where said two streams meet, thereby reducing the average size of said ferromagnetic waste particles in said fluid waste.
8 more elements
A device for processing water-including waste, comprising:
- a reactor vessel with a mixing component for mixing contents of said reactor vessel;
- a fluid-waste inlet for introducing water-including waste into said reactor vessel;
- at least one reagent adder for adding a metered amount of at least one of ferromagnetic powder, anionic flocculant, cationic flocculant and coagulant into said reactor vessel;
- an outlet conduit for directing a reaction product of said water-including waste with an added reagent which reaction product includes ferromagnetic waste particles in fluid waste out of said reactor vessel;
- and
- a magnetic separator configured to:
- receive the reaction product;
- and
- to separate the ferromagnetic waste particles in the reaction product from the fluid waste by application of a magnetic field that attracts the ferromagnetic waste particles, thereby yielding a solid ferromagnetic waste material and a liquid wastewater supernatant,
- further comprising a particle-size reducing module for receiving reaction product which includes the ferromagnetic waste particles in the fluid waste from said reactor vessel through said outlet conduit, reducing the average particle size of the ferromagnetic waste particles, and directing the reduced-size ferromagnetic particles in the fluid waste to said magnetic separator, said particle-size reducing module comprising:
- two mutually-facing nozzles, each for expelling the fluid waste as a stream so that the two streams when simultaneously expelled from said two nozzles meet at a volume between said two nozzles;
- two conduits, each said conduit functionally-associated with a different one of said two nozzles, each said conduit of said two conduits for directing the fluid waste therein to an associated said nozzle;
- and
- functionally-associated with each one of said two conduits, a pump to drive the fluid waste through said conduits and out through said nozzles functionally-associated therewith as a stream.
11 more elements
Dependencies are inferred from the claim text.