Water Purification Sequence for Humic Substance Decomposition
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Solution Overview
Problem
Existing water purification methods using ozone and OH radicals are inefficient in decomposing humic substances like fulvic acid, leading to incomplete decomposition and the generation of numerous by-products.
Innovation Solution
A water purification system and method involving the addition of hydrogen peroxide, followed by irradiation with a wavelength of 320 nm light, and subsequent ozone treatment to effectively decompose humic substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If strong oxidation using ozone and OH radicals is used to decompose organic substances, then decomposition ability is improved, but when humic substances are present, incomplete decomposition occurs and numerous by-products are generated
Solution Approach 1:
The patent applies preliminary action by adding hydrogen peroxide before ozone treatment to pre-activate the water matrix. This preliminary step creates a favorable chemical environment that enables complete subsequent decomposition of humic substances without generating harmful by-products, thereby resolving the contradiction between strong oxidation power and by-product formation.
2Productivity
If conventional oxidation methods are used, then processing speed is maintained, but decomposition efficiency for humic substances is insufficient
Solution Approach 1:
The patent changes the chemical parameters of the water matrix by introducing hydrogen peroxide, which alters the oxidation pathway. This parameter change enables complete decomposition of recalcitrant humic substances while maintaining processing speed, thereby simultaneously improving both productivity and decomposition efficiency.
3Reliability
If multiple treatment steps are added to improve decomposition, then decomposition efficiency is improved, but system complexity increases
Solution Approach 1:
The patent merges the oxidation functions by combining hydrogen peroxide addition with subsequent ozone treatment in an integrated flow. This merging approach achieves complete decomposition of humic substances while avoiding the need for separate complex treatment units, thereby improving decomposition efficiency without significantly increasing system complexity.
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 system achieves significant decomposition of humic substances with minimal by-product formation by leveraging the synergistic effect of hydrogen peroxide and 320 nm light, followed by ozone treatment to ensure complete decomposition.
Implementation Method 1
irradiating the water to be treated with light having a wavelength of 320 nm
Implementation Method 2
oxidatively decompose object substances in a water to be treated in a lump by strong oxidation using ozone, OH radicals
Data Source
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AI summary
The problem to be solved by the present invention is to provide an effective water purification system. A water purification system 1 comprises a hydrogen peroxide addition section 31 for adding hydrogen peroxide to a water to be treated, a light irradiation section 32 for irradiating the water to be treated with light having a wavelength of 320 nm, and an ozone treatment section 33 for treating with ozone. A humic substance in the water to be treated is decomposed by light irradiation in the light irradiation section 32, and the remaining substance is decomposed by ozone treatment in the ozone treatment section 33.