Electrobiochemical Reactor Direct Electron Supply for Contaminant Removal
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Solution Overview
Problem
Conventional biological treatment systems require excess nutrients to provide electrons for microbial growth and contaminant removal, leading to increased costs and biomass production, and are inefficient in removing metals and inorganics like arsenic and selenium to safe levels in drinking water.
Innovation Solution
The method involves directly supplying electrons to microorganisms and enzymes in an electrochemical bioreactor using electrodes, creating a free electron field that enhances metabolic health and performance, allowing for efficient transformation and removal of target compounds without the need for excess nutrients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional biological treatment systems use excess nutrients to provide electrons for microbial growth and contaminant removal, then microbial biomass production increases, but operational costs and system complexity increase
Solution Approach 1:
The patent extracts the electron supply function from the nutrient metabolism function. Instead of relying on microbes to metabolize nutrients to generate electrons, the system directly supplies electrons to microbes through electrochemical means, separating the electron source from the carbon source and eliminating the need for excess nutrient addition
Solution Approach 2:
The patent replaces the biochemical mechanism of nutrient metabolism with an electrochemical mechanism. Instead of using chemical reactions of nutrient degradation to provide electrons, the system uses direct electrical electron supply through electrodes, substituting a mechanical/electrical system for a biochemical one
2Productivity
If conventional biological treatment systems rely on microbial metabolism to provide electrons, then the system is self-sustaining, but the rate of contaminant removal is slow and efficiency is low
Solution Approach 1:
The system performs preliminary action by directly supplying electrons to microbes before the contaminant transformation can occur. This pre-provisioning of electrons eliminates the time-consuming step of microbial metabolism and allows immediate initiation of contaminant reduction reactions
Solution Approach 2:
The patent establishes continuity of useful action through direct electron supply that can be maintained continuously. Unlike nutrient metabolism which has inherent rate limits and temporal variations, the electrochemical electron supply can be sustained at optimal rates, ensuring continuous and efficient contaminant removal
3Reliability
If conventional systems add excess nutrients to compensate for metabolic energy requirements, then microbial growth is supported, but operational costs increase
Solution Approach 1:
The patent extracts the energy requirement from the nutrient addition requirement. By supplying electrons directly rather than through nutrient metabolism, the system eliminates the need to add excess nutrients to compensate for metabolic energy costs, separating the stability function from the substance consumption function
Solution Approach 2:
The system implements self-service by using the electrical power supply to directly provide electrons to microbes, eliminating the need for external nutrient addition. The system serves its own energy requirements through the electrochemical input rather than relying on continuous nutrient supplementation
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 significantly improves the rate and efficiency of contaminant removal, reduces biomass production, and lowers operational costs by providing electrons directly to microorganisms, enabling effective removal of challenging contaminants like arsenic and selenium.
Implementation Method 1
electrochemical bioreactor (EBR), to facilitate transformation and/or removal of target compounds from a liquid
Implementation Method 2
Microbes mediate the removal of metal and inorganic contaminants through electron transfer (redox processes)
Data Source
AI summary
A method for supplying freely available electrons to microorganisms and/or enzymes includes applying a voltage and amperage to electrodes to create a free electron field between the electrodes, thus directly supplying electrons to the microorganisms and/or enzymes to enhance the effectiveness of the microorganisms and/or enzymes. Supplying the microorganisms and/or enzymes with electrons enhance their effectiveness in transforming and/or removing one or more target compounds from the liquid to be treated.