Indoor food waste fermentation and recycling process
The invention is a system and method for transforming food waste into a commercial cleaning product. The system is containable in an enclosed facility and installable in urban environments. Food waste is sorted and ground into uniformly sized particles, heated to an acceleration temperature, inoculated with an inoculant including lactic acid bacteria, which is mixed into the ground waste. The waste then undergoes sedentary fermentation for times as short as 24 hours or less. The fermented waste is separated into liquids and solids, and liquids are further separated into at least one distillation stream. Solids are dried to obtain a second distillation stream.
1. A process for producing a cleaning solution from food waste comprising the steps of:
removing inorganic items from the food waste, resulting in a screened waste;
reducing the screened waste into uniform particles, resulting in a shredded waste;
heating the shredded waste to up to 45 degrees Celsius;
applying an inoculants solution containing lactic acid bacteria to the shredded waste and mixing the shredded waste with the inoculant for up to 48 hours, resulting in a fermentation-ready waste;
fermenting the fermentation-ready waste until pH reaches 4 or below, resulting in a fermented batch;
separating the fermented batch into a liquid and a wet solid;
further processing the liquid to remove suspended particles resulting in a first liquid stream;
drying the wet solid using heat until the wet solid achieves 50% or greater reduction in weight, resulting in a dried fermented waste;
collecting condensate from the drying of the wet solid resulting in a second liquid stream; and
processing the first and the second liquid streams together by applying up to 0.2 micron filtration and ultraviolet light treatment resulting in the cleaning solution.
2. The process of claim 1 wherein the inoculants solution is stored in an inoculant holding tank and comprising additional steps of
draining free-flowing liquids from the food waste;
monitoring the inoculants solution for sugars concentration; and
adding the free-flowing liquids drained from the food waste to the inoculant holding tank before sugars concentration reaches zero.
3. The process of claim 1 wherein the further processing of the liquid step comprises applying a first filter followed by distilling a permeate of the first filter, resulting in the first liquid stream.
4. The process of claim 2 wherein the further processing of the liquid step comprises applying a first filter followed by distilling a permeate of the first filter, resulting in the first liquid stream.
5. The process of claim 1 wherein the further processing of the liquid step comprises applying a first filter and a second filter, recycling a retentate of the first or the second filter to fermentation, and distilling a permeate of the second filter, wherein distilling a permeate of the second filter results in the first liquid stream.
6. The process of claim 2 wherein the further processing of the liquid step comprises applying a first filter and a second filter, recycling a retentate of the first or the second filter to fermentation, and distilling a permeate of the second filter, wherein distilling a permeate of the second filter results in the first liquid stream.
7. The process of claim 3 wherein distilling a permeate of the first filter comprises a first distillation stream from low boiling point liquids and a second distillation stream from high boiling point liquids, wherein the first liquid stream is equivalent to the first distillation stream, and further comprising the step of applying a third filter to the second distillation stream, resulting in a concentrated acid solution and a purified water.
8. The process of claim 4 wherein distilling a permeate of the first filter comprises a first distillation stream from low boiling point liquids and a second distillation stream from high boiling point liquids, wherein the first liquid stream is equivalent to the first distillation stream, and further comprising the step of applying a third filter to the second distillation stream, resulting in a concentrated acid solution and a purified water.
9. The process of claim 5 wherein distilling a permeate of the second filter comprises a first distillation stream from low boiling point liquids and a second distillation stream from high boiling point liquids, wherein the first liquid stream is equivalent to the first distillation stream, and further comprising the step of applying a third filter to the second distillation stream, resulting in a concentrated acid solution and a purified water.
10. The process of claim 6 wherein distilling a permeate of the second filter comprises a first distillation stream from low boiling point liquids and a second distillation stream from high boiling point liquids, wherein the first liquid stream is equivalent to the first distillation stream, and further comprising the step of applying a third filter to the second distillation stream, resulting in a concentrated acid solution and a purified water.