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US 11,767,248 B2Granted
Process and apparatus for the treatment of organic feedstock
AssigneeS.G.T.—Sustainable Green Technologies Ltd
InventorsGal Levin, Reuven Eitan
Life of this patent
Estimating the term…
Abstract
A system for treating organic feedstock, particularly livestock or poultry wastewater. The system employs combined anaerobic and aerobic digestion for converting the wastewater into safe water, fertilizer, and energy, wherein sequencing batch reactors (i.e. ASBR and SBR) are used for the digestion process.
Claims13
A feedstock treatment apparatus for processing liquid livestock or poultry waste, comprising
- a) a stirred feed vessel for feeding homogenized and optionally diluted liquid feedstock to a first anaerobic reactor;
- b) a second anaerobic reactor in recycling communication with said first anaerobic reactor, each of said first and second anaerobic reactors being an anaerobic sequencing batch reactors (ASBR);
- c) an aerobic reactor sequencing batch reactors (SBR) in recycling communication with at least one of said two anaerobic reactors;
- d) a stirring means for independent stirring of said reactors;
- e) a discharge basin connected to at least one of said two anaerobic reactors for receiving a portion of settled waste from said at least one anaerobic reactors;
- f) a safe water vessel for receiving a top portion of water from said aerobic reactor;
- g) a gas collector for collecting biogas produced in at least one of said anaerobic reactors;
- and
- h) a transfer means for transferring fluids into, out from, and through said reactors and for regulating the flow of said fluids, the means comprising conduits, valves, pumps, sensors, and a processor;
- wherein said stirring means are configured to alternately work to allow for homogenization of the reactor contents during a stirring cycle and to stop to allow for settling solids in the reactors contents during a settling cycle, wherein said fluids comprise biogas and water, wherein said water is transferred out from the reactors in batches during their settling cycles, and wherein said processor is configured to receive signals from said sensors and send signals to said stirring means, valves, and pumps.
7 more elements
A process for treating feedstock comprising liquid livestock or poultry waste, comprising:
- i) collecting feedstock comprising said waste in a feed vessel;
- ii) diluting and homogenizing said feedstock into homogenized liquid waste;
- iii) transferring said homogenized liquid waste from said feed vessel to a first anaerobic reactor selected from anaerobic sequencing batch reactors (ASBR), and from said first ASBR to a second ASBR;
- iv) facilitating the anaerobic digestion of waste by repeated stirring and settling cycles, the stirring cycles comprises mixing the liquid waste in said ASBR, and the settling cycles allowing solids in said waste liquid to at least partially settle in said two anaerobic reactors, wherein a portion of settled liquid waste from the bottom part of said second ASBR during its settling cycle is transferred to said first ASBR;
- v) transferring a portion of treated waste from the top part of said second ASBR during its settling cycle to an aerobic sequencing batch reactor (SBR);
- vi) facilitating the aerobic digestion of waste by repeated stirring and settling cycles, the stirring cycles comprising aeration and mixing of liquid waste in said SBR, and the settling cycles allowing solids in said waste liquid to at least partially settle;
- vii) transferring a portion of liquid from the bottom part of said SBR during its settling cycle to at least one of said two ASBR;
- viii) transferring a portion of liquid from the top part of said SBR during its settling cycle to a safe water vessel;
- and
- ix) transferring a portion of settled liquid waste from at least one of said two anaerobic reactors during their settling cycle to a discharge basin;
- wherein said transferring steps are managed by transferring means comprising conduits, valves, pumps, sensors, and a processor, said processor configured to receive signals from said sensors and to send signals to start or stop said stirring, start or stop pumps, and open or close valves.
8 more elements
Dependencies are inferred from the claim text.