Dielectric Partition Wall Attracts Bacteria for Radical Sterilization
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Solution Overview
Problem
Existing liquid treatment systems face challenges in efficiently sterilizing water by colliding radicals with bacteria, as radicals often fail to effectively interact with bacteria floating in the water, leading to slow sterilization processes.
Innovation Solution
A liquid treatment apparatus with a dielectric partition wall dividing the treatment tank into two spaces, where a high-frequency AC voltage is applied between electrodes, attracting bacteria to the wall surface and increasing the collision efficiency of radicals with the bacteria, thereby enhancing sterilization speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If radicals are generated in water to sterilize bacteria, then sterilization function is achieved, but collision efficiency between radicals and bacteria is low because bacteria float in water
Solution Approach 1:
A dielectric partition wall is introduced as an intermediary component between the water and electrodes. This wall creates a specific interface where bacteria are selectively attracted and concentrated, serving as a mediator that enhances the interaction between radicals and bacteria without directly contacting the electrodes or water flow
Solution Approach 2:
The dielectric partition wall creates a localized region with different electrical properties. By applying AC voltage, the wall generates localized electric field effects at its surface, creating a specific zone where bacteria are concentrated through electrostatic attraction, while the rest of the water remains unaffected
2Reliability
If high voltage is applied to generate plasma and radicals, then sterilization effectiveness is improved, but energy consumption increases
Solution Approach 1:
The system uses AC voltage with variable frequency and amplitude parameters. By optimizing these electrical parameters, the plasma generation efficiency is improved, allowing effective radical production at lower energy consumption levels compared to DC high voltage systems
Solution Approach 2:
The AC voltage application creates continuous plasma generation and radical production. The alternating nature of the voltage ensures sustained ionization and radical formation without interruption, maintaining constant sterilization effectiveness while optimizing energy utilization through periodic cycles
3Power
If electrodes are arranged in water for discharge, then plasma generation is achieved, but bacterial collision efficiency remains low
Solution Approach 1:
The dielectric partition wall acts as a mediator that concentrates bacteria at its surface through electrostatic attraction. This creates a high-density bacterial zone near the wall where plasma-generated radicals can efficiently interact with and sterilize bacteria, overcoming the low collision efficiency in bulk water
Solution Approach 2:
The treatment space is segmented by the dielectric partition wall into regions with different functions. One region generates plasma and radicals through electrode discharge, while the other region concentrates bacteria at the wall surface, creating specialized zones that work together to improve overall sterilization efficiency
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 apparatus effectively kills bacteria in a short time by attracting them to the dielectric partition wall, allowing radicals to collide and sterilize the water efficiently, even in turbulent conditions, and can achieve one-pass sterilization.
Implementation Method 1
when a high-frequency AC voltage is applied between both the electrodes, radicals are produced in the water to be treated, while bacteria in the water to be treated are attracted to a wall surface of the dielectric partition wall
Implementation Method 2
when a high-voltage pulse is applied between both the electrodes to cause discharge, plasma is generated in a gas bubble formed through an instantaneous boiling phenomenon, producing OH, H, O, O2−, O−, and H2O2
Implementation Method 3
when a high-voltage pulse is applied between both the electrodes to cause discharge
Data Source
AI summary
A liquid treatment apparatus for treating water to be treated, according to the present disclosure, includes a treatment tank, a dielectric partition wall dividing inside of the treatment tank into a first space in which the water to be treated is injected, and a second space in which an electrolytic solution is filled, a first electrode at least part of which is arranged in the first space of the treatment tank, a second electrode at least part of which is arranged in the second space of the treatment tank, and a power supply that applies a high-frequency AC voltage between the first electrode and the second electrode.