Engineered Microbial Pathways for Butadiene Biosynthesis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing butadiene rely on fossil-based sources and involve energy-intensive dehydration steps, leading to environmental concerns and high costs, while direct fermentative production from renewable feedstocks is not yet efficiently achieved.
Innovation Solution
Development of non-naturally occurring microbial organisms with engineered butadiene biosynthetic pathways, using nucleic acids encoding butadiene pathway enzymes to produce butadiene through metabolic engineering and adaptive evolution, allowing for continuous bioprocesses and reduced environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If butadiene is produced through traditional steam cracking of petroleum feedstocks, then butadiene can be manufactured at current scale, but the process consumes large amounts of energy and produces harmful emissions
Solution Approach 1:
The patent replaces the thermal cracking process (heat-based mechanical energy input) with a biological fermentation process using engineered microorganisms. The microorganisms convert renewable feedstocks directly into butadiene through metabolic pathways, eliminating the need for high-temperature steam cracking and associated energy consumption while maintaining production capacity
Solution Approach 2:
The invention changes the fundamental production parameters from petrochemical steam cracking conditions (high temperature, fossil feedstocks) to biological fermentation conditions (moderate temperature, renewable feedstocks). This parameter transformation enables sustainable butadiene production with reduced energy input and environmental impact
2Adaptability or versatility
If butadiene is produced through fermentation to diols followed by dehydration, then butadiene can be produced from renewable feedstocks, but an additional dehydration step is required involving metal-based catalysis
Solution Approach 1:
The patent extracts and eliminates the intermediate diol production and dehydration steps from the traditional two-step process. By engineering microorganisms with complete butadiene biosynthetic pathways, the invention produces butadiene directly through fermentation, removing the need for separate dehydration units and metal-based catalysts while maintaining renewable feedstock utilization
Solution Approach 2:
The invention merges multiple separate process steps (feedstock conversion, diol synthesis, dehydration) into a single integrated biological fermentation process. The engineered microorganisms perform all transformations internally, converting renewable feedstocks directly to butadiene in one step and reducing overall process complexity
3Productivity
If direct fermentative production of butadiene is implemented, then dehydration steps can be eliminated, but the microorganisms require engineered butadiene biosynthetic pathways
Solution Approach 1:
The patent performs preliminary genetic engineering of microorganisms to establish complete butadiene biosynthetic pathways before fermentation. By pre-introducing necessary genes and enzymes (such as butadiene synthase and pathway regulator proteins), the microorganisms are prepared in advance to efficiently produce butadiene directly, eliminating the need for subsequent dehydration steps and simplifying the overall manufacturing process
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 the efficient production of butadiene from renewable feedstocks, reducing energy consumption, waste, and emissions, while achieving high yields and genetic stability in microbial organisms, thus promoting sustainable chemical production.
Implementation Method 1
Direct fermentative production of butadiene from renewable feedstocks
Implementation Method 2
nucleic acids encoding butadiene pathway enzymes expressed in a sufficient amount to produce butadiene
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention provides non-naturally occurring microbial organisms having a butadiene pathway. The invention additionally provides methods of using such organisms to produce butadiene.