# US 12,006,237 B2 · Efficient operation of an anaerobic-aerobic SBR

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- Number: US 12,006,237 B2
- Document ID: US12006237B2
- Status: Granted
- Kind: B2
- Application number: 17/273,861
- Filed: 2019-09-15
- Published: 2021-11-11
- Granted: 2024-06-11
- Earliest claimed: 2018-09-17
- Assignees: S.G.T.—Sustainable Green Technologies Ltd
- Applicants: S.G.T.—Sustainable Green Technologies Ltd
- Inventors: Gal Levin; Reuven Eitan
- Web page: https://patentgrep.com/patent/US12006237B2

## CPC

- C02F 11/02: Biological treatment
- C02F 1/008: {Control or steering systems not provided for elsewhere in subclass C02F}
- C02F 3/1263: {Sequencing batch reactors [SBR]}
- C02F 3/282: {using anaerobic sequencing batch reactors}
- C02F 3/305: {characterised by the denitrification}
- C02F 11/04: Anaerobic treatment; Production of methane by such processes
- C12M 21/04: {for producing gas, e.g. biogas (digesters for manure with production of biogas A01C3/028, biological treatment of water, waste water or sewage C02F3/00, C02F11/02, preparation of natural gas or syngas C10L3/06, C10L3/10)}
- C02F 2103/22: from the processing of animals, e.g. poultry, fish, or parts thereof
- C02F 2103/32: from the food or foodstuff industry, e.g. brewery waste waters
- C02F 2209/03: Pressure
- C02F 2301/046: Recirculation with an external loop
- C02F 2301/06: Pressure conditions
- Y02E 50/30: Fuel from waste, e.g. synthetic alcohol or diesel
- Y02W 10/10: Biological treatment of water, waste water, or sewage
- Y02W 10/20: Sludge processing
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)
- C12M: APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; {APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS}
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

A method for the efficient operation of a waste treatment apparatus comprising an anaerobic-aerobic sequencing batch reactors (SBR). The method comprises the synchronized transfer of waste between the reactors, for preventing unsafe buildup of pressure in the anaerobic reactor and reaching unsafe levels.

## Claims

### Claim 1

A method for preventing unsafe buildup of pressure in pressure in at least one anaerobic reactor in a system comprising two anaerobic reactors in recycling communication with one another and at least one aerobic reactor in sequencing batch reactor (SBR) arrangement, while avoiding vacuum in a second one of said anaerobic reactors, each of said reactors being in recycling communication with at least one other reactor, comprising the steps of:
i) feeding a feedstock waste of a specified volume to a first anaerobic reactor; and simultaneously,
ii) transferring a portion of waste of said specified volume from said second anaerobic reactor to said aerobic reactor.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
iii) transferring a portion of waste activated sludge (WAS) having said specified volume from said aerobic reactor to said second anaerobic reactor; and simultaneously,
iv) discharging a portion of WAS having said specified volume from said second anaerobic reactor.

### Claim 3 (depends on 1)

The method of claim 1, further comprising:
transferring waste from said second anaerobic reactor to said first anaerobic reactor.

### Claim 4 (depends on 1)

The method of claim 1, further comprising:
transferring waste from said aerobic reactor to said second anaerobic reactor.