Detoxifying Lignocellulose via Phenolic Oxidizing Enzymes
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Solution Overview
Problem
Current processes for producing fermentation products from lignocellulose-containing materials face challenges due to the toxicity of phenolics and furans, which inhibit enzyme performance and require costly detoxification steps like steam stripping or large water usage for washing.
Innovation Solution
Incorporating a detoxification process using phenolic compound oxidizing enzymes and/or peroxidase enzymes before hydrolysis, which removes inhibitory compounds and allows for simultaneous or sequential hydrolysis and fermentation, reducing process time and eliminating the need for additional washing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If steam stripping is used for detoxification, then toxic compounds are removed, but process complexity and cost increase
Solution Approach 1:
The harmful phenolic compounds and furans are extracted from the pre-treated lignocellulose material through a washing step using water or buffer solution, separating the toxic substances from the substrate before hydrolysis and fermentation
Solution Approach 2:
The detoxification is achieved by changing the pH parameter through washing with buffer solutions, which alters the solubility and extractability of phenolic compounds, allowing their removal without complex equipment
2Object-affected harmful factors
If washing is used for detoxification, then toxic compounds are removed, but water consumption and process cost increase
Solution Approach 1:
The washing water that contains extracted phenolic compounds is discarded or potentially recovered, while the detoxified material proceeds to hydrolysis and fermentation, eliminating the need for additional detoxification equipment
Solution Approach 2:
The washing step uses simple water or buffer solution instead of complex detoxification equipment, copying the function of steam stripping but with simpler means and lower cost
3Productivity
If detoxification is not performed, then process simplicity is maintained, but enzyme performance and fermentation efficiency decrease
Solution Approach 1:
The washing detoxification step is performed preliminarily before hydrolysis and fermentation, removing toxic compounds that would otherwise inhibit enzyme activity and fermentation efficiency, ensuring optimal conditions for subsequent steps
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
This approach enhances the performance of fermenting organisms, shortens the fermentation process, and eliminates the need for costly detoxification methods, improving the efficiency and cost-effectiveness of fermentation product production.
Implementation Method 1
detoxifying comprising subjecting the pre-treated lignocellulose-containing material to one or more phenolic compound oxidizing enzymes and/or one or more enzymes exhibiting peroxidase activity
Data Source
Figure 1
AI summary
The invention relates to a process of detoxifying pre-treated lignocellulose-containing material comprising subjecting the pre-treated lignocellulose-containing material to one or more phenolic compound oxidizing enzymes.