Anaerobic waste treatment system for vehicles

Patent metadata

Field	Value
Publication number	US-11235997-B2
Application number	US-201916395176-A
Country	US
Kind code	B2
Filing date	Apr 25, 2019
Priority date	Apr 25, 2019
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

A method, an apparatus, and a system for treating a waste in a vehicle. The waste is received from a lavatory in a waste tank through a waste input port connected to the lavatory in the vehicle. Anaerobic bacteria are introduced into the waste such that anaerobic digestion occurs to breakdown a biodegradable material in the waste in the waste tank.

First claim

What is claimed is:

1. A waste treatment system in an aircraft, such that the waste treatment system comprises:
a waste tank, in the aircraft, that comprises a waste portion and a separated portion;
an anaerobic bacteria treatment system that contains anaerobic bacteria selected to digest a waste in the waste tank and configured to introduce the anaerobic bacteria to the waste such that anaerobic digestion occurs to breakdown biodegradable material in the waste in the waste tank;
a semipermeable membrane that extends across the waste tank, defines a separation of the waste portion from the separated portion, and is configured for water diffusion through the semipermeable membrane into the separated portion to form separated water, such that the waste portion of the waste tank connects to:
a vacuum pump; and
a lavatory in the aircraft by a conduit system connected to a reservoir configured to store the anaerobic bacteria in a configuration such that, responsive to a vacuum caused by the vacuum pump, a movement of waste from the lavatory to the waste tank through the conduit system also causes a movement of anaerobic bacteria, stored in the reservoir, from the reservoir into the conduit system;

sheets within the waste portion of the waste tank configured to support the anaerobic bacteria and separated from each other by a distance that varies based upon a distribution of waste in the waste tank; and
an output port in the separated portion of the waste tank configured to remove the separated water from the separated portion through the output port to a water treatment system connected to a recycled water tank connected to the lavatory and to an output configured to jettison recycled water out of the aircraft.

2. The waste treatment system of claim 1 further comprising:
the output configured to jettison the recycled water through a fuselage of the aircraft;
the recycled water tank configured to hold the recycled water; and
wherein the water treatment system increases a water quality of the separated water to form the recycled water.

3. The waste treatment system of claim 2 , wherein the water treatment system comprises at least one of a reverse osmosis unit, a group of water filters, or an ultraviolet light system.

4. The waste treatment system of claim 1 , further comprising the sheets configured parallel to each other with a separation space between each of the sheets that varies based upon a quantity of the anaerobic bacteria required in the waste tank.

5. The waste treatment system of claim 4 , wherein the anaerobic bacteria treatment system further comprises:
a frame in the waste tank, wherein the sheets are attached to the frame.

6. The waste treatment system of claim 1 , wherein the anaerobic bacteria treatment system comprises:
an anaerobic bacteria injector system comprising:
a group of injectors positioned at a group of injection locations located in at least one of the conduit system that carries the waste in the aircraft or the waste tank; and
the reservoir that holds the anaerobic bacteria.

7. The waste treatment system of claim 2 , wherein the recycled water in the recycled water tank also distributes to a potable water.

8. The waste treatment system of claim 1 , wherein the aircraft is a commercial aircraft.

9. An aircraft waste treatment system that comprises:
a lavatory and a waste tank that comprises a separated portion, connected to a recycled water tank, and a waste portion connected to a vacuum pump and configured to receive waste from the lavatory, such that the waste tank comprises a semipermeable membrane that extends across the waste tank and defines a separation of the waste portion from the separated portion;
a reservoir connected to a conduit system from the lavatory to the waste tank and configured to store an anaerobic bacteria configured to digest the waste in the waste tank, such that:
an anaerobic digestion occurs to breakdown a biodegradable material in the waste in the waste tank and generate water that becomes separated water in the separated portion of the waste tank; and
the vacuum pump is configured to cause a vacuum in the waste tank that causes a movement of the waste from the lavatory to the waste tank through the conduit system and a movement of the anaerobic bacteria, stored in the reservoir, from the reservoir into the conduit system;

sheets within the waste tank configured to support the anaerobic bacteria and separated from each other by a distance that varies based upon a desired waste distribution in the waste portion of in the waste tank; and
an output port in the separated portion connected to a water treatment system connected to a recycled water tank connected to the lavatory and to an output configured to jettison recycled water out of the aircraft.

10. The aircraft waste treatment system of claim 9 , further comprising:
the anaerobic bacteria stored in the reservoir and moved from the reservoir into the waste comprising a coat on the sheets.

11. The aircraft waste treatment system of claim 10 , further comprising:
a frame in the waste tank, wherein the sheets are attached to the frame; and
the sheets being separated from each other by a distance that varies based upon a quantity of the anaerobic bacteria required in the waste tank.

12. The aircraft waste treatment system of claim 10 , wherein the sheets are parallel to each other.

13. The aircraft waste treatment system of claim 11 , wherein the frame is removably connected to the waste tank.

14. The aircraft waste treatment system of claim 11 , wherein the sheets comprise:
poly grass mats, wherein the anaerobic bacteria are associated with the poly grass mats.

15. The aircraft waste treatment system of claim 11 , wherein a sheet in the sheets comprises:
a planar structure with a cavity in which the anaerobic bacteria are located; and
holes in the planar structure through which the anaerobic bacteria contact the waste.

16. The aircraft waste treatment system of claim 15 , wherein each sheet further comprises:
a biodegradable water-soluble polymer in which the anaerobic bacteria are located, wherein the biodegradable water-soluble polymer degrades and releases the anaerobic bacteria when the biodegradable water-soluble polymer comes into contact with the waste.

17. The aircraft waste treatment system of claim 9 , further comprising injectors positioned at a group of injection locations located in the conduit system that carries the waste in the aircraft waste treatment system or in the waste tank.

18. The aircraft waste treatment system of claim 17 , wherein an injector in the injectors is selected from a nozzle and a plurality of nozzles.

19. The aircraft waste treatment system of claim 9 , further comprising the separated water comprising water from the waste portion diffused through the semipermeable membrane.

20. The aircraft waste treatment system of claim 19 , wherein the water treatment system increases a water quality of the separated water in the separated portion to form recycled water.

21. The aircraft waste treatment system of claim 20 , wherein the water treatment system comprises at least one of a reverse osmosis unit, a group of water filters, or an ultraviolet light system.

22. The aircraft waste treatment system of claim 20 , wherein the recycled water distributes to a potable water.

23. The aircraft waste treatment system of claim 9 , wherein injectors introduce the anaerobic bacteria such that the

Assignees

• Boeing Co

Inventors

• Aggarwal Saurabh
• Shastri Rajeev
• Natarajan Subramaniam

Classifications

• C02F3/348

  characterised by the way or the form in which the microorganisms are added or dosed · CPC title

• C02F2209/36

  Biological material, e.g. enzymes or ATP · CPC title

• C02F3/2806

  Anaerobic processes using solid supports for microorganisms · CPC title

• C02F3/2853 Primary

  using anaerobic membrane bioreactors · CPC title

• C02F1/441

  by reverse osmosis · CPC title