Methanotrophic Bioreactor for Consistent PHA Production
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Solution Overview
Problem
Current methods for treating methane emissions, particularly from sources like landfills and wastewater treatment plants, are not economically or technologically feasible due to variable methane flow rates, concentrations, and purity, making it difficult to generate commercially useful products using methanotrophic microorganisms.
Innovation Solution
A system and method involving a bioreactor with methanotrophic microorganisms that utilize methane and non-methane substances to produce polyhydroxyalkanoate (PHA) polymers, which can replace oil-based plastics, by controlling essential nutrient concentrations to induce methane monooxygenase production and PHA synthesis, allowing for consistent functional properties and harvestable products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If methanotrophic microorganisms are used to treat methane emissions, then methane can be converted into useful products, but the variable flow rate, concentration, and purity of methane emissions make the process economically and technologically infeasible
Solution Approach 1:
The patent applies parameter changes by controlling the carbon-to-nitrogen ratio in the culture medium and adjusting nutrient concentrations to optimize PHA production. By modifying these chemical parameters, the system achieves consistent product quality despite variable methane input conditions, resolving the contradiction between productivity and reliability.
2Use of energy by moving object
If methane emissions are treated using conventional methods like turbines or fuel cells, then energy can be generated, but these methods are not economically feasible under variable sub-optimal methane conditions
Solution Approach 1:
The patent converts the harmful methane emissions into beneficial PHA polymers through microbial metabolism. Methanotrophic bacteria consume methane and convert it into polyhydroxyalkanoates, transforming an environmental problem into a valuable biodegradable plastic product. This approach works effectively under variable sub-optimal conditions where conventional energy generation methods fail.
3Loss of energy
If methane emissions are captured and used to produce fuel or electricity, then wasted carbon and energy are utilized, but the variable concentration and purity reduce treatment effectiveness
Solution Approach 1:
The patent introduces methanotrophic microorganisms as an intermediary between methane emissions and useful products. These bacteria serve as a biological mediator that can process variable quality methane gas and consistently produce PHA polymers with controlled molecular weight and functional properties, overcoming the limitations of direct chemical conversion methods.
4Object-affected harmful factors
If biodegradable polymers are produced from methane emissions, then environmental impact is reduced, but consistent functional properties must be achieved for commercial viability
Solution Approach 1:
The patent employs feedback control by monitoring and adjusting nutrient concentrations and carbon-to-nitrogen ratios in the culture medium based on desired PHA production outcomes. This closed-loop approach ensures consistent molecular weight and functional properties of the biodegradable polymers are achieved, making the process commercially viable while reducing environmental impact.
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 sustainable and economically viable treatment of methane emissions by producing biodegradable polymers with consistent functional properties, reducing environmental impact and providing a valuable product, thus overcoming the limitations of previous methods.
Implementation Method 1
methanotrophic microorganisms that metabolize the gas to produce a biodegradable polymer
Implementation Method 2
induce the methanotrophic microorganisms to produce particulate methane monooxygenase (pMMO) and/or soluble methane monooxygenase (sMMO)
Data Source
AI summary
Several embodiments of the invention relate generally to a system and methods for the treatment of gaseous emissions comprising methane and one or more non-methane compounds that can influence the metabolism of methane-oxidizing microorganisms. In several embodiments, there is provided a system and methods for the treatment of methane emissions through the use of methanotrophic microorganisms to generate functionally consistent and harvestable products. Certain embodiments of the invention are particularly advantageous because they reduce environmentally-destructive methane emissions and produce harvestable end-products.