Indoor food waste fermentation and recycling process

Inventors: Amanda Weeks (Brooklyn, NY); Brett Van Aalsburg (Brooklyn, NY); Erik Vosburgh (Brooklyn, NY); Maria del Pilar Sanchez Rodriguez (New York, NY)

Assignee: Recycle Track Systems, Inc.

C05F17/50 C05F9/02 C05F17/20 C05F17/60 C05F17/964 C11D3/201 C11D3/2079 C11D3/2086 H01M8/16 Y02A40/20 Y02E60/50 Y02P20/145 Y02W30/40

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Quick Facts

Patent No.: US 11,220,467
App. No.: 15/867,948
Granted: Jan 11, 2022
Kind: B2

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Abstract

A process for fermenting and recycling food waste that is fully enclosed, eliminating noxious odors, and therefore installable in a wide variety of urban settings at scale. Generally the steps of the process include intake, shredding and grinding, inoculation and acceleration, heterolactic fermentation, separation of solids and liquids, drying and distillation, and post-processing of liquid and solid byproducts. The result of the process includes useful goods such as nutrient-rich soil fertilizer, household cleaning agent, energy in the form of current or hydrogen, and treated water. The process is energy efficient and self-contained, resulting in the processing of food waste within 7 days, thus dramatically reducing the time of traditional fermentation processes to produce desired byproducts.

Claims (68)

1. A process for treating food waste comprising the steps of:

removing inorganic items from food waste deposited in a screening enclosure, resulting in a screened waste;

transferring the screened waste from the screening enclosure to a reducing apparatus;

reducing, via the reducing apparatus, the screened waste into uniform particles, resulting in a ground waste;

transferring the ground waste from the reducing apparatus to an accelerator;

converting, via the accelerator, the ground waste to a fermentation-ready waste, said converting comprising:

applying an inoculant to the ground waste,

raising a temperature of the ground waste to between 20 and 50 degrees Celsius, and

mixing the ground waste with the inoculant for up to 48 hours, resulting in the fermentation-ready waste;

transferring the fermentation-ready waste from the accelerator to a fermenter;

fermenting, via the fermenter, the fermentation-ready waste to a fermented waste having a pH of 5 or below, said fermenting comprising anaerobic, acidic fermentation;

transferring the fermented waste from the fermenter to a separator;

separating, via the separator, the fermented waste into a solid fermented waste and a fermentation-treated liquid;

transferring the solid fermented waste from the separator to a dryer;

drying, via the dryer, the solid fermented waste until a weight of the solid fermented waste is reduced by 50% or greater, resulting in a dried fermented waste and a fermentation distillate,

wherein the fermentation distillate is collected during said drying.

2. The process of claim 1 , wherein the reducing apparatus comprises a conveyer for moving the screened waste through an industrial shredding blade apparatus and into an industrial waste disposal grinder operable to reduce the screened and shredded waste to the ground waste having a particle size no greater than ½ cubic inch.

3. The process of claim 1 , wherein the accelerator comprises a rotating mixing tank that is heated by circulation of a heated fluid, liquid or gas, convectively on the tank's surface.

4. The process of claim 2 , wherein the accelerator comprises a rotating mixing tank that is heated by circulation of a heated fluid, liquid or gas, convectively on the tank's surface.

5. The process of claim 1 , wherein the fermenting step is performed without rotation of the fermenter.

6. The process of claim 2 , wherein the fermenting step is performed without rotation of the fermenter.

7. The process of claim 3 , wherein the fermenting step is performed without rotation of the fermenter.

8. The process of claim 1 further comprising inputting the fermentation-treated liquid and/or the fermentation distillate to a bioelectric reactor comprised of a microbial fuel cell having exoelectrogenic bacteria for electricity generation.

9. The process of claim 2 further comprising inputting the fermentation-treated liquid and/or the fermentation distillate to a bioelectric reactor comprised of a microbial fuel cell having exoelectrogenic bacteria for electricity generation.

10. The process of claim 3 further comprising inputting the fermentation-treated liquid and/or the fermentation distillate to a bioelectric reactor comprised of a microbial fuel cell having exoelectrogenic bacteria for electricity generation.

11. The process of claim 5 further comprising inputting the fermentation-treated liquid and/or the fermentation distillate to a bioelectric reactor comprised of a microbial fuel cell having exoelectrogenic bacteria for electricity generation.

12. The process of claim 6 further comprising inputting the fermentation-treated liquid and/or the fermentation distillate to a bioelectric reactor comprised of a microbial fuel cell having exoelectrogenic bacteria for electricity generation.

13. The process of claim 7 further comprising inputting the fermentation-treated liquid and/or the fermentation distillate to a bioelectric reactor comprised of a microbial fuel cell having exoelectrogenic bacteria for electricity generation.

14. The process of claim 1 further comprising:

receiving the food waste in a food waste collection bin marked with a tracking number associated with a customer;

recording one or more parameters relating to a composition of the food waste in said food waste collection bin;

associating said parameters with the customer; and