Ozone-Hydrogen Peroxide Water Treatment Bromate Control
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Solution Overview
Problem
Existing accelerated oxidation treatment methods fail to sufficiently suppress the generation of bromate ions in water treatment, despite variations in treatment water conditions, due to limitations in controlling ozone and hydrogen peroxide levels.
Innovation Solution
Adjusting the amount of hydrogen peroxide supplied based on measured bromate ion concentration, while also independently adjusting ozone levels, to optimize treatment efficiency and minimize bromate ion generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the amount of ozone supplied is kept down to reduce bromate ion generation, then bromate ion generation is suppressed, but the efficiency of decomposition of substances to be decomposed is insufficient
Solution Approach 1:
The patent changes the parameter of hydrogen peroxide concentration to control bromate ion generation. By adjusting hydrogen peroxide concentration independently of ozone concentration, the system can suppress bromate ion generation without reducing ozone supply for decomposition efficiency. This resolves the contradiction by introducing a new control variable (hydrogen peroxide concentration) that decouples the relationship between ozone supply and bromate generation.
Solution Approach 2:
The patent implements feedback control by measuring bromate ion concentration in the treated water and using this information to adjust the hydrogen peroxide supply amount. This closed-loop feedback mechanism allows the system to automatically suppress bromate ion generation while maintaining adequate ozone concentration for decomposition efficiency, resolving the contradiction through adaptive control.
2Object-generated harmful factors
If an excessive amount of hydrogen peroxide is supplied to reduce dissolved ozone concentration and suppress bromate ion generation, then bromate ion generation is suppressed, but treatment cost increases
Solution Approach 1:
The patent uses feedback control where bromate ion concentration measurements guide hydrogen peroxide supply adjustments. This ensures hydrogen peroxide is supplied only when and where needed to suppress bromate ions, avoiding excessive supply and associated costs. The feedback mechanism optimizes the balance between bromate suppression and treatment cost.
Solution Approach 2:
The patent dynamically adjusts hydrogen peroxide supply based on real-time conditions of the treatment water, including bromate ion concentration, pH, and ozone levels. This dynamic adjustment allows the system to optimize hydrogen peroxide usage according to actual needs, preventing excessive supply and associated cost increases while maintaining effective bromate suppression.
3Quantity of substance
If the amount of hydrogen peroxide is adjusted according to dissolved ozone concentration, then the ozone concentration is controlled, but bromate ion generation cannot be sufficiently suppressed when treatment water conditions vary
Solution Approach 1:
The patent changes the control parameter from dissolved ozone concentration to bromate ion concentration for determining hydrogen peroxide supply. This parameter change allows direct control over bromate ion generation while maintaining ozone concentration for decomposition efficiency. By using bromate ion concentration as the control parameter, the system can sufficiently suppress bromate generation despite variations in treatment water conditions.
Solution Approach 2:
The patent implements feedback control by measuring bromate ion concentration and using this information to adjust hydrogen peroxide supply. This feedback mechanism directly addresses bromate ion generation rather than indirectly controlling it through ozone concentration, enabling sufficient suppression of bromate ions even when treatment water conditions vary.
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
Effectively suppresses bromate ion generation across varying treatment water conditions, enhancing treatment efficiency and reducing costs by optimizing ozone and hydrogen peroxide usage.
Implementation Method 1
an oxidative decomposition reaction by ozone molecules and an oxidative decomposition reaction by hydroxyl radicals generated by the decomposition of ozone molecules are performed
Implementation Method 2
by combining hydrogen peroxide or the like with ozone and by thereby promoting the generation of hydroxyl radicals
Implementation Method 3
bromine ions (Br−) in the treatment water generate hypobromous ions (OBr−) by reacting with the ozone. And these hypobromous ions are further oxidized by the ozone to produce bromate ions (BrO3−)
Data Source
AI summary
An accelerated oxidation treatment method of performing oxidation treatment upon treatment water by supplying ozone and hydrogen peroxide to the treatment water, including an accelerated oxidation treatment process of bringing hydrogen peroxide and ozone into contact with the treatment water, and a bromate ion concentration measurement process of measuring the bromate ion concentration in the treatment water after the accelerated oxidation treatment process, with the amount of hydrogen peroxide supplied in the accelerated oxidation treatment process being adjusted on the basis of the measured value of bromate ion concentration.