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US 11,891,547 B2Granted
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
AssigneeUniversity of Louisiana at Lafayette
InventorsWilliam Chirdon, Mark Zappi, Rafael Hernandez, Chelsea Trahan
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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.
Claims11
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.
1 more element
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.
Dependencies are inferred from the claim text.