Oxygen-Permeable Cathode Design for Low-Oxygen Water Purification
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Solution Overview
Problem
Existing water purification systems face inefficiencies in redox reactions due to insufficient dissolved oxygen levels at the cathode electrode, particularly in environments with low oxygen concentration.
Innovation Solution
A water purification apparatus and system utilizing a container body holding organic substances and electrochemically active bacteria, with an anode electrode, a hollow body containing oxygen, a cathode electrode allowing oxygen permeation, and a resistor electrically coupled to both electrodes, stabilizing the redox reaction by ensuring consistent oxygen supply to the cathode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the cathode electrode is disposed in a place where the amount of dissolved oxygen is small, then the device can operate in low oxygen environments, but the redox reaction in the cathode electrode becomes insufficient
Solution Approach 1:
The hollow body is pre-filled with oxygen gas before being installed in the water purification system. This preliminary action ensures that oxygen is already present and available when the cathode electrode begins operation, eliminating the lag time required for dissolved oxygen to accumulate in low oxygen environments and enabling immediate efficient redox reactions
Solution Approach 2:
The hollow body acts as an intermediary oxygen reservoir between the external environment and the cathode electrode. It stores oxygen in gaseous form and provides it to the cathode electrode through the permeable second surface, mediating the oxygen supply to ensure sufficient oxygen availability for redox reactions regardless of the surrounding water's dissolved oxygen concentration
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
Stabilizes the redox reaction at the cathode electrode, enhancing the efficiency and stability of water purification processes by maintaining a consistent oxygen supply, thereby improving the purification capacity and output power.
Implementation Method 1
a cathode electrode having a first surface in contact with the liquid and a second surface that allows the oxygen contained in the gas held in the hollow body to permeate
Implementation Method 2
The cathode electrode causes redox reaction of dissolved oxygen in water
Data Source
AI summary
A water purification apparatus includes a container body holding a liquid containing organic substances and electrochemically active bacteria, an anode electrode disposed in the liquid, a hollow body holding a gas containing oxygen, a cathode electrode having a first surface in contact with the liquid and a second surface that allows the oxygen contained in the gas held in the hollow body to permeate, and being disposed with respect to the anode electrode via the liquid, and a resistor electrically coupled to the anode electrode and the cathode electrode.