Production of adhesives and other glue-like materials from unextracted sewage treatment plant sludges, animal manures and animal manure-based sludges, and bacterial/fungal cells and cell components s as derived from culturing operations

Patent metadata

Field	Value
Publication number	US-11891547-B2
Application number	US-202117205081-A
Country	US
Kind code	B2
Filing date	Mar 18, 2021
Priority date	Sep 13, 2018
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

A system and method for treatment of biomass originating from wastewater treatment biosolids to obtain valuable adhesives and composite materials is described herein. Some embodiments do not require purification of a biomass product or residue to produce an adhesive.

First claim

The invention claimed is:

1. A method for producing an adhesive from biomass, comprising the steps of: a. obtaining a biomass; b. denaturing proteins in said biomass to generate an adhesive product without requiring any prior extractions; c. wherein the denaturing step is a heated, alkaline-based process while under high shear; d. wherein the adhesive product has a shear strength of greater than 350 psi.

2. The method of claim 1 , wherein the denaturing step occurs between 0° C. and 120° C. with a reaction time of between 30 seconds to 120 minutes.

3. The method of claim 1 , wherein the denaturing step occurs between 15° C. and 70° C. with a reaction time of between 30 seconds to 20 minutes.

4. The method of claim 1 , wherein the denaturing step occurs between 50° C. and 60° C. with a reaction time of between 30 seconds to 20 minutes.

5. The method of claim 1 , wherein the denaturing step occurs between 70° C. and 120° C. with a reaction time of between 30 seconds to 20 minutes.

6. The method of claim 2 , wherein the biomass comprised wastewater treatment sludge selected from the group consisting of primary sludge, secondary sludge; and biosolids.

7. The method of claim 2 , wherein the biomass comprises cultured microorganisms.

8. The method of claim 2 , wherein the biomass comprises animal-based manures.

9. The method of claim 2 , wherein a purified protein is mixed with the biomass prior to denaturing.

10. The method of claim 1 , wherein the adhesive product comprises 20-62.5% of the denatured proteins.

11. A method for producing an adhesive, comprising the steps of: a. mixing from 20-62.5% purified plant protein with 37.5%-80% biomass obtained from a waste source forming a biomass and protein mixture; b. denaturing said biomass and protein mixture without any prior extractions in a heated, alkaline-based process while under high shear with a reaction time of between 30 seconds to 20 minutes to form an adhesive with a shear strength of greater than 350 psi and a molecular weight greater than 50,000 daltons; wherein the biomass obtained from a waste source comprised wastewater treatment sludge selected from the group consisting of primary sludge, secondary sludge, and biosolids.

Assignees

• Univ Louisiana At Lafayette

Inventors

• Chirdon William
• Zappi Mark
• Hernandez Rafael
• Trahan Chelsea

Classifications

• C09J189/04 Primary

  Products derived from waste materials, e.g. horn, hoof or hair · CPC title

• C07K1/14

  Extraction; Separation; Purification · CPC title

• C02F11/18

  by thermal conditioning (by pyrolysis C02F11/10) · CPC title