Astaxanthin Fermentation via Biotin and Oxygen Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing astaxanthin using microorganisms face challenges such as high production costs, low productivity, and the difficulty of extracting carotenoids due to strong cell walls, as well as the need to control canthaxanthin levels to avoid toxicity limits in feed additives.
Innovation Solution
A method involving the culture of Paracoccus bacteria in a medium with biotin to produce astaxanthin while maintaining low canthaxanthin levels, utilizing controlled dissolved oxygen concentrations and mutant strains with reduced PHB and gluconic acid production to enhance astaxanthin productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If chemical synthesis methods are used to produce astaxanthin, then production cost is reduced and productivity is improved, but consumer safety perception deteriorates due to unfavorable safety impression
Solution Approach 1:
The patent employs a microorganism (bacterium) as a disposable biological factory that can be cultivated, harvested, and replaced. The bacterium converts inexpensive carbon sources into astaxanthin through metabolic processes, providing a renewable and safe alternative to chemical synthesis while maintaining high productivity.
2Object-affected harmful factors
If extraction from natural sources such as shrimp and crab is used to obtain astaxanthin, then consumer safety perception is improved, but production cost increases significantly
Solution Approach 1:
The bacterium serves as a self-service production system where the microorganism naturally produces astaxanthin through its metabolic pathways when provided with appropriate carbon sources and growth conditions. This eliminates the need for complex extraction processes from animal sources, significantly reducing production costs while maintaining the natural origin advantage.
3Object-affected harmful factors
If green alga or yeast is used for astaxanthin production, then consumer safety perception is improved, but productivity decreases and extraction becomes difficult due to strong cell walls
Solution Approach 1:
The patent changes the biological parameter from algae or yeast to a specific bacterium that produces astaxanthin. This parameter change results in softer cell structures that are easier to break and extract, while maintaining the advantages of natural origin. The bacterial system also exhibits faster growth rates and higher astaxanthin productivity compared to traditional algae or yeast systems.
4Productivity
If conventional culture methods using Paracoccus bacteria are used to produce astaxanthin, then productivity is improved and extraction becomes easier, but canthaxanthin accumulates in large amounts which limits its use as feed additive
Solution Approach 1:
The patent applies local quality control by specifically adjusting culture conditions (carbon source type, nitrogen source, pH, temperature, dissolved oxygen) to favor astaxanthin production pathways while suppressing canthaxanthin accumulation. This localized optimization of cultural parameters enables selective enhancement of the desired product (astaxanthin) while minimizing the unwanted byproduct (canthaxanthin).
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 allows for the high-concentration production of astaxanthin at a low cost while keeping canthaxanthin levels within safe limits, improving the efficiency and cost-effectiveness of carotenoid production.
Implementation Method 1
a method for producing carotenoids including astaxanthin by culturing a bacterium that concurrently produces astaxanthin and canthaxanthin in a medium containing biotin
Data Source
AI summary
An object of the present invention is to provide a method for microbiologically producing astaxanthin of high concentration at low cost while suppressing production of canthaxanthin. Specifically, the present invention relates to a method for producing carotenoids including astaxanthin comprising culturing a bacterium that concurrently produces astaxanthin and canthaxanthin in a medium containing biotin, wherein a ratio of concentration of produced canthaxanthin to concentration of produced astaxanthin in a culture product after the end of culture in the medium is lower than that in a culture product after the end of culture in a biotin-free medium.