Nutrient rich compositions
This invention relates to processes and systems for converting fresh food waste into nutrient rich hydrolysates and particulate compositions. The invention also relates to the hydrolysates and compositions useful, for example, as fertilizers, feedstock or other nutrient supplements.
1. An emulsified hydrolysate made by the process of:
(a) providing fresh food waste using a collection system; (b) grinding the fresh food waste using a first grinder to produce a fresh food waste particle slurry; (c) incubating the fresh food waste particle slurry under constant agitation by adding to said fresh food waste particle slurry a combination of enzymes comprising at least one enzyme to digest proteins, at least one enzyme to digest fats and lipids, at least one enzyme to digest cellulosic material and at least one enzyme to digest other carbohydrates and incubating the mixture at two or more temperatures ranging between about 100° F. and 130° F., to match the temperature performance curves of the enzymes wherein a third grinder is used to create shear during at least part of the incubating, whereby a hydrolysate comprising incubated fresh food waste particles is produced; (d) pasteurizing the hydrolysate to kill pathogens; (e) separating the hydrolysate into a liquid hydrolysate and incubated fresh food particles using a coarse screen and a fine screen; (f) stabilizing and preserving the hydrolysate, using a stabilizer selected from: acid, preservatives, organic acids, organic preservatives allowed for use in the production of a certified organic hydrolysate, and mixtures thereof; (g) emulsifying the stabilized hydrolysate using an ultra-high-shear mixer to produce a stabilized, emulsified hydrolysate; and (h) blending the emulsified hydrolysate in storage tanks with circulation pumps, to assure the consistency of the finished product.
2. The nutrient rich emulsified hydrolysate of claim 1 wherein multiple batches of the hydrolysate have been blended in storage tanks with circulation pumps, to assure the consistency of the finished product.
3. The emulsified hydrolysate of claim 1 , wherein the waste particles produced in step (b) have an average diameter of less than about 74 microns as measured by laser light scattering.
4. The emulsified hydrolysate of claim 3 , wherein the waste particles produced in step (b) have an average particle size of about 30 μm as measured by laser light scattering.
5. The emulsified hydrolysate of claim 1 , wherein the organic preservative added in step (f) is selected from: tocopherol, D-α tocopherol acetate, or natamycin.
6. The emulsified hydrolysate of claim 5 , wherein the organic preservative is tocopherol or D-α tocopherol acetate at a level of 10 to 150 mg/kg.
7. The emulsified hydrolysate of claim 5 , wherein the organic preservative is natamycin at a level of 0.1 to 100 mg/ml.
8. The emulsified hydrolysate of claim 1 , wherein pathogen levels are undetectable by the Bacteriological Analytical Manual (BAM) method.
9. The emulsified hydrolysate of claim 1 , wherein the fresh food waste used in step (a) has not begun anaerobic digestion.
10. The emulsified hydrolysate of claim 1 , wherein the liquid hydrolysate is greater than about 85% by weight up to about 95% relative to the weight of the input incubating fresh food waste.
11. The emulsified hydrolysate of claim 1 , wherein the pH of the liquid hydrolysate is less than 4.0.
12. The emulsified hydrolysate of claim 1 , wherein the pH of the stabilized liquid hydrolysate is about 2.5 to about 3.5.
13. The emulsified hydrolysate of claim 1 , wherein the pH of the stabilized liquid hydrolysate is about 3.0.
14. The emulsified hydrolysate of claim 1 , wherein step (b) further comprises grinding the fresh food waste with a second grinder after grinding the fresh food waste with a first grinder.