Biorefinery Segmentation for Diverse Waste Conversion

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Solution Overview

Problem

Current biorefinery systems are limited in their ability to efficiently convert the diverse range of municipal solid waste, sewage sludge, and agricultural residuals into multiple value-added products due to their single conversion process-based designs, which are not adaptable to the complex composition of urban wastes.

Innovation Solution

A biorefinery system and method that integrates multiple conversion paths, including gasification, thermal depolymerization, hydrothermal conversion, pyrolysis, and biotreatment, to segregate and process combustible, complex organic, and bioconvertible feedstocks, producing syngas, biochar, biocrude, biooil, and waste activated sludge containing lipids, thereby offering flexibility and increased product diversity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single conversion process is used in biorefinery systems, then the system design is simple, but the ability to efficiently convert diverse municipal solid waste into multiple value-added products is limited

Engineering Contradiction:

Improveability to convert diverse waste into multiple productsVSAvoidsystem design complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The biorefinery system divides waste feedstock into distinct segments (combustible, complex organic, and bioconvertible fractions) and processes each segment through dedicated conversion pathways (gasification, thermal depolymerization, and biotreatment respectively). This segmentation enables the system to handle diverse waste compositions effectively while maintaining operational efficiency and producing multiple value-added products simultaneously.

Inventive Principle:

Principle #1Segmentation

2Productivity

If multiple conversion paths are integrated, then product diversity and waste conversion efficiency increase, but system complexity increases

Engineering Contradiction:

Improvewaste conversion efficiencyVSAvoidnumber of conversion processes

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The system merges three distinct conversion processes (gasification, thermal depolymerization, and biotreatment) into a single integrated biorefinery facility that processes different waste fractions simultaneously. This merging enables comprehensive waste conversion with high productivity while sharing common infrastructure such as feedstock reception, product handling, and energy recovery systems, thereby reducing overall operational complexity.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If multiple conversion paths are integrated, then product diversity increases, but operational complexity increases

Engineering Contradiction:

Improveproduct diversityVSAvoidoperational management

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

Each conversion unit within the biorefinery system is optimized for its specific function: gasification units are designed for high-temperature combustion of combustible waste, thermal depolymerization units are configured for breaking down complex organic polymers, and biotreatment units are engineered for biological degradation of bioconvertible fractions. This localized optimization enables diverse product production while simplifying operational management through specialized, easily controlled process units.

Inventive Principle:

Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system achieves greater than 70% carbon conversion to products, significantly reduces emissions and disposal costs, and creates profitable income streams by converting over 90% of input wastes into various valuable products, addressing the limitations of single conversion systems.

Implementation Method 1

gasifying the combustible feedstock to produce syngas

Methodology Applied

Scientific EffectGasification:

Implementation Method 2

fermenting the produced syngas to create residual acetic acid

Methodology Applied

Scientific EffectFermentation: Fermentation

Implementation Method 3

thermal processing the complex organic feedstock to produce biocrude, biocoal, and/or biooil

Methodology Applied

Scientific EffectPyrolysis: Pyrolysis

Data Source

PatentUS20220403423A1Integrated biorefinery system and method

Publication Date: 2022.12.22 UNIVERSITY OF LOUISIANA AT LAFAYETTE

AI summary

The inventive biorefinery system and method accepts municipal solid waste, sewage sludges, and/or ag-wastes and processes it through three primary conversion unit operations to produce a variety of value-added products. In a preferred embodiment, the three primary conversion units are gasification, thermal depolymerization or torrefaction/pyrolysis, and biotreatment.