Chemoautotrophic Carbon Fixation Without Light Exposure or Arable Land
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Solution Overview
Problem
Existing biofuel production methods rely heavily on agriculture, leading to resource scarcity and environmental impact, while chemoautotrophic microorganisms require fixed carbon feedstocks and are limited by light exposure, resulting in inefficient carbon fixation and high land or material costs.
Innovation Solution
A novel biological and chemical process using chemoautotrophic microorganisms to fix inorganic carbon into organic compounds, driven by separate carbon and energy sources, including electron donors generated from renewable and low-carbon emission technologies, and utilizing chemosynthetic reactions in various environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If photosynthetic microorganisms are used to fix carbon dioxide into organic compounds, then carbon fixation can occur with high growth rates, but the process is limited by light exposure and requires high surface area to volume ratio, resulting in large land footprint or high material costs
Solution Approach 1:
The patent replaces the light-dependent photosynthetic mechanism with a chemosynthetic mechanism that uses chemical energy from inorganic electron donors. This substitution eliminates the need for light exposure and high surface area to volume ratio, allowing the use of conventional bioreactor geometries with smaller land footprint while maintaining high carbon fixation rates through chemosynthetic pathways.
2Use of energy by moving object
If agriculture-based methods are used for biofuel production, then liquid hydrocarbon fuels can be produced with high energy density, but heavy requirements for arable land, fresh water, and other resources lead to resource scarcity and environmental impact
Solution Approach 1:
The patent employs chemoautotrophic microorganisms that can synthesize organic compounds and grow using only inorganic carbon sources (CO2, bicarbonate, carbonate) and inorganic electron donors, without requiring agricultural inputs such as arable land, fresh water, fertilizers, or pesticides. The system essentially serves itself by using abundant inorganic resources to produce fuel-grade organic compounds, eliminating the resource consumption issues associated with agriculture-based biofuel production.
3Productivity
If chemoautotrophic microorganisms are used with separate carbon and energy sources, then carbon fixation efficiency is improved, but the process requires fixed carbon feedstocks and is limited by light exposure
Solution Approach 1:
The patent fundamentally changes the parameter of carbon source from fixed carbon feedstocks to inorganic carbon sources (CO2, bicarbonate, carbonate), and changes the energy source from light-dependent to chemically-driven through inorganic electron donors. This parameter change enables chemoautotrophic microorganisms to operate independently of light exposure and eliminates the need for fixed carbon feedstocks, simultaneously improving carbon fixation efficiency and expanding feedstock versatility to include abundant inorganic carbon resources.
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
Enables efficient carbon capture and conversion into high-value organic compounds, producing liquid hydrocarbon fuels with reduced environmental impact and compatibility with existing infrastructure, leveraging untapped geochemical energy sources.
Implementation Method 1
fixing the carbon dioxide and/or inorganic carbon into organic compounds within the environment via at least one chemosynthetic carbon fixing reaction utilizing obligate and/or facultative chemoautotrophic microorganisms
Implementation Method 2
the chemosynthetic carbon fixing reaction is driven by chemical and/or electrochemical energy provided by electron donors and electron acceptors
Implementation Method 3
the chemosynthetic carbon fixing reaction is driven by chemical and/or electrochemical energy provided by electron donors and electron acceptors that have been generated chemically and/or electrochemically
Data Source
AI summary
The invention described herein presents compositions and methods for a multistep biological and chemical process for the capture and conversion of carbon dioxide and/or other forms of inorganic carbon into organic chemicals including biofuels or other useful industrial, chemical, pharmaceutical, or biomass products. One or more process steps utilizes chemoautotrophic microorganisms to fix inorganic carbon into organic compounds through chemosynthesis. An additional feature described are process steps whereby electron donors used for the chemosynthetic fixation of carbon are generated by chemical or electrochemical means, or are produced from inorganic or waste sources. An additional feature described are process steps for recovery of useful chemicals produced by the carbon dioxide capture and conversion process, both from chemosynthetic reaction steps, as well as from non-biological reaction steps.