Integrated Biofuel Process Enzyme Reuse
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Solution Overview
Problem
The production of biofuels from lignocellulosic materials is hindered by the complexity of lignocellulose structures and high costs associated with enzyme use for hydrolysis, as well as inefficient utilization of pentose sugars by traditional ethanol-producing organisms.
Innovation Solution
An integrated process utilizing lipid-producing microorganisms like Aspergillus to produce enzymes that can degrade both hemicellulose and cellulose, allowing for the recovery and reuse of exoenzymes in biofuel production, thereby reducing external enzyme costs and enhancing the efficiency of biofuel production from lignocellulosic materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If commercial enzymes are purchased and used for hydrolysis of lignocellulosic materials, then the hydrolysis process can be performed, but the enzyme costs are too high
Solution Approach 1:
The patent employs microorganisms that produce their own hydrolytic enzymes (cellulases, hemicellulases) to degrade lignocellulosic materials. This self-service mechanism eliminates the need to purchase external commercial enzymes, thereby resolving the contradiction between achieving hydrolysis capability and reducing enzyme costs. The microorganisms simultaneously perform hydrolysis and biofuel production, making the system self-sufficient.
2Productivity
If traditional ethanol-producing organisms are used, then ethanol production is achieved, but pentose sugars are not utilized efficiently
Solution Approach 1:
The patent utilizes microorganisms with multi-functional capabilities that can simultaneously utilize both hexose and pentose sugars for biofuel production. These microorganisms possess both cellulolytic activity (for hexose release) and pentose utilization pathways, enabling them to convert all major carbohydrate constituents of lignocellulose into biofuels. This universality resolves the contradiction by making the same organism capable of processing diverse sugar types that were previously requiring multiple specialized organisms.
3Quantity of substance
If lignocellulosic materials are used for biofuel production, then abundant and low-cost feedstock is utilized, but the complex structure resists biodegradation
Solution Approach 1:
The patent employs microorganisms that produce hydrolytic enzymes as a preliminary action to break down the complex lignocellulosic structure before biofuel production. The microorganisms secrete cellulases and hemicellulases that pre-treat and depolymerize the recalcitrant lignocellulose, making it more accessible for subsequent fermentation. This preliminary enzymatic hydrolysis resolves the contradiction by preparing the resistant feedstock structure in advance, enabling efficient biofuel production from abundant lignocellulosic materials.
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 enables more complete utilization of lignocellulosic materials, reduces enzyme costs, and improves the economics of biofuel production by allowing on-site enzyme production and reuse, leading to increased efficiency and reduced environmental burden.
Implementation Method 1
The enzymes for hydrolysis of sugar polymers to monomers need to be bought, but the enzyme costs are presently too high. The pre-treatment of lignocellulosic material with high yield to sugars that are utilizable by micro-organisms represents one of the highest challenges.
Implementation Method 2
The production of biofuels, especially ethanol, from lignocellulosic materials by microbial fermentations has been studied extensively.
Data Source
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AI summary
The present invention relates to an integrated process, which comprises a first biotechnical process, which produces biofuel and/or starting material for biofuel and uses a microorganism capable of producing enzymes, and a second biotechnical process, which produces biofuel and/or starting material for biofuel. The process comprises that said microorganisms are cultivated and biofuel and/or starting material for biofuel and enzymes are produced. The microorganism culture, supernatant or a protein enriched fraction or a dilution of the supernatant comprising catalytically active enzyme(s) are introduced into the first and/or into the second biotechnical process, or feedstock for said process(es) is treated. The invention relates also to use of the produced enzymes in biofuel production process or in other applications as an enzyme preparation or as a source of enzymes. The invention relates also to use of the produced lipids and alcohols as biofuel, as a component of biofuel or as a starting material for biofuel production.