Microwave Decontamination System for Space Water
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Solution Overview
Problem
The International Space Station and future manned space exploration face challenges in producing sufficient potable water due to bacterial contamination, which can mutate into resistant strains, and current chemical biocides used for decontamination pose adverse health effects over time.
Innovation Solution
A system and method utilizing a microwave energy radiation device generating a signal between 10 GHz to 100 GHz to decontaminate fluids by killing at least 90% of bacteria, fungi, parasites, and viruses without significantly increasing the temperature of the medium, thus eliminating the need for chemical additives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical biocides such as iodine or silver are introduced into water to kill bacteria, then decontamination effectiveness is improved, but adverse health effects occur over time for crew members
Solution Approach 1:
The patent replaces chemical decontamination methods with a physical microwave-based system. The microwave radiation device generates electromagnetic signals at frequencies from about 10 GHz to about 100 GHz that directly kill contaminants through non-thermal mechanisms, eliminating the need for chemical biocides and their associated health risks while maintaining decontamination effectiveness
Solution Approach 2:
The patent utilizes specific microwave frequency parameters (10-100 GHz range) to achieve selective interaction with contaminants. By controlling the frequency and power parameters of the microwave radiation, the system kills contaminants through dielectric heating and non-thermal effects while limiting temperature increase of the water to less than about 10°C, thus avoiding chemical additives
2Reliability
If microwave energy is used to kill contaminants, then chemical additive-free decontamination is achieved, but temperature control must be maintained to avoid overheating
Solution Approach 1:
The microwave radiation is applied in controlled periodic pulses rather than continuous exposure. The system delivers microwave energy in cycles that allow for controlled heating and cooling, ensuring the temperature increase remains limited to less than about 10°C while still achieving effective contaminant kill rates of at least 90%
Solution Approach 2:
The system incorporates temperature monitoring and control mechanisms that provide feedback to adjust microwave power delivery. This ensures the temperature of the water remains within safe limits (increase of less than about 10°C) while maintaining effective decontamination through controlled microwave exposure
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
The microwave energy radiation effectively kills contaminants while maintaining a temperature increase of less than 10°C, providing a safe and efficient method for decontaminating fluids without chemical additives, suitable for both terrestrial and microgravity environments.
Implementation Method 1
A microwave energy radiation device can be adapted to generate a signal having a frequency from about 10 GHz to about 100 GHz. The signal can be adapted to kill one or more of the contaminants disposed within the medium while increasing a temperature of the medium by less than about 10° C.
Data Source
AI summary
A system for decontaminating a medium. The system can include a medium having one or more contaminants disposed therein. The contaminants can be or include bacteria, fungi, parasites, viruses, and combinations thereof. A microwave energy radiation device can be positioned proximate the medium. The microwave energy radiation device can be adapted to generate a signal having a frequency from about 10 GHz to about 100 GHz. The signal can be adapted to kill one or more of the contaminants disposed within the medium while increasing a temperature of the medium by less than about 10° C.