Ion Membrane Electrolysis for High-Salinity Wastewater Recycling
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Solution Overview
Problem
Current desalination processes for high-salinity wastewater are energy-intensive, inefficient, and fail to achieve resource utilization, while nanofiltration membrane-based systems have low separation efficiency and prolonged processing times, leading to hazardous waste disposal issues.
Innovation Solution
A solar-enhanced electrochemical treatment process involving ion membrane electrolysis, photothermal coupled activation degradation, and electrochemical oxidation degradation systems to generate and recycle strongly oxidizing salts, degrading organic pollutants without additional chemicals or energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional circulating evaporation-crystallization technology is used for desalination, then salt separation is achieved, but energy consumption is high and circulation volume is large
Solution Approach 1:
The patent replaces conventional mechanical evaporation-crystallization systems with an electrochemical oxidation system that uses electrical energy to generate oxidants for degrading organic pollutants and precipitating salts. This substitution of mechanical/thermal processes with electrochemical processes reduces energy consumption while achieving salt separation and resource recovery.
Solution Approach 2:
The patent changes the operating parameters by using electrochemical oxidation instead of thermal evaporation. By controlling electrical parameters (current density, voltage) and chemical parameters (oxidant concentration, pH), the system achieves efficient salt separation and organic pollutant degradation with lower energy consumption compared to conventional thermal methods.
2Quantity of substance
If nanofiltration membrane-based hybrid processes are used for sulfate separation, then salt separation is attempted, but separation efficiency is low and processing time is prolonged
Solution Approach 1:
The patent replaces nanofiltration membrane separation with electrochemical oxidation processes. By using electrical energy to generate strong oxidants (such as ozone, hydrogen peroxide, and hydroxyl radicals), the system achieves rapid degradation of organic pollutants and precipitation of salts without relying on slow membrane filtration processes.
Solution Approach 2:
The patent employs strong oxidants generated through electrochemical oxidation to rapidly degrade organic pollutants and transform salts into separable forms. This accelerated oxidation process significantly reduces processing time compared to conventional nanofiltration methods, achieving high sulfate separation efficiency quickly.
3Quantity of substance
If conventional desalination processes are used, then salt removal is achieved, but resource utilization is failed and salts become hazardous waste
Solution Approach 1:
The patent converts the harmful effect of high-salinity wastewater into a beneficial resource by using electrochemical oxidation to transform salts into valuable chemical products. Instead of discarding salts as hazardous waste, the system recovers and utilizes them for industrial purposes, turning a harmful byproduct into a valuable resource.
Solution Approach 2:
The patent implements a recovery system that captures and recovers salts and distilled water from the electrochemical oxidation process. By recovering these materials for reuse in industrial processes, the system eliminates the need to discard them as hazardous waste, achieving both salt removal and resource utilization simultaneously.
4Quantity of substance
If high-salinity wastewater is treated to achieve resource recycling, then organic pollutant removal is improved, but operational complexity increases
Solution Approach 1:
The patent designs an integrated electrochemical oxidation system that performs multiple functions simultaneously: degrading organic pollutants, precipitating salts, generating distilled water, and producing chemical products. This multi-functional approach reduces the need for separate treatment processes, thereby reducing overall operational complexity while achieving high organic pollutant removal 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
Achieves efficient resource utilization of high-salinity wastewater, with 99.9% organic pollutant removal efficiency and cost-effective recycling of salts and distilled water, reducing operational costs and energy consumption.
Implementation Method 1
subjecting the high-salinity wastewater to an ion membrane electrolysis process to generate a strongly oxidizing salt solution
Implementation Method 2
generating a strongly oxidizing salt solution through electrochemical oxidation
Implementation Method 3
activating and degrading the mixed solution with a photothermal coupled activation degradation system
Implementation Method 4
activating and degrading the mixed solution with a photothermal coupled activation degradation system
Implementation Method 5
degrading the activated and degraded solution through an electrochemical oxidation degradation system
Implementation Method 6
evaporating and concentrating the high-salinity solution to obtain a high-salinity concentrate
Data Source
AI summary
Disclosed is a method for resource recycling of high-salinity wastewater treated by a solar-enhanced electrochemical process. The method includes: step S1: subjecting the high-salinity wastewater to an ion membrane electrolysis process to generate a strongly oxidizing salt solution A; step S2: mixing the strongly oxidizing salt solution A with organic wastewater to obtain a mixed solution, and activating and degrading the mixed solution with a photothermal coupled activation degradation system to obtain an activated and degraded solution; step S3: degrading the activated and degraded solution through an electrochemical oxidation degradation component to obtain a high-salinity solution; step S4: evaporating and concentrating the high-salinity solution to obtain a high-salinity concentrate; step S5: subjecting the high-salinity concentrate to the ion membrane electrolysis process to generate a strongly oxidizing salt solution B; and Step S6: repeating step S2 to step S5.