Single Resin Nitrate Perchlorate Removal Regeneration
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Solution Overview
Problem
Conventional water treatment methods require separate systems and resins to remove nitrates and perchlorates, leading to increased time, space requirements, and reduced resin lifespan when using a single resin for both contaminants.
Innovation Solution
A method utilizing a single nitrate-specific resin, such as a strong base anion resin, to adsorb both nitrates and perchlorates, with a regeneration process using a salt solution that extends the resin's operational lifetime by maintaining removal performance for over five years without significant capacity loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single nitrate-specific resin is used to remove both nitrates and perchlorates, then the system becomes more compact and cost-effective, but the resin lifespan is substantially decreased
Solution Approach 1:
The resin bed is segmented into multiple functional zones: an upper perchlorate removal zone and a lower nitrate removal zone. This segmentation allows each zone to specialize in removing its target contaminant, preventing perchlorate from damaging the nitrate-specific resin while maintaining both removal functions in a single integrated system.
Solution Approach 2:
Different regions of the resin bed are assigned different functional qualities - the upper portion is optimized for perchlorate removal while the lower portion is optimized for nitrate removal. This local differentiation allows the single resin system to handle both contaminants effectively without compromising resin lifespan through incompatible chemical interactions.
2Duration of action of stationary object
If two separate sorbent beds are used to remove perchlorates and nitrates sequentially, then resin lifespan is extended, but time and physical space requirements increase significantly
Solution Approach 1:
The patent merges two separate treatment processes into a single integrated resin bed. By combining perchlorate removal and nitrate removal functions into one physical system with proper zonation, the treatment process eliminates the need for sequential processing steps and multiple separate beds, thereby reducing time and space requirements while maintaining extended resin lifespan.
Solution Approach 2:
The single resin bed is designed with multi-functionality to perform both perchlorate and nitrate removal simultaneously. The upper zone handles perchlorate removal while the lower zone handles nitrate removal, allowing one system to fulfill multiple treatment functions that would traditionally require separate systems.
3Device complexity
If a single resin is used for both perchlorate and nitrate removal, then system compactness is improved, but the resin capacity is reduced due to contamination
Solution Approach 1:
The resin bed is vertically segmented into distinct zones where the upper portion is dedicated to perchlorate removal and the lower portion is dedicated to nitrate removal. This spatial segmentation prevents cross-contamination between the two contaminant types, preserving the full capacity of each resin zone for its specific function while maintaining system compactness.
Solution Approach 2:
Different segments of the resin bed are assigned specialized local qualities - the upper zone has properties optimized for perchlorate affinity while the lower zone has properties optimized for nitrate affinity. This local specialization prevents capacity loss from contamination while maintaining both removal functions in a compact single-bed system.
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 method effectively reduces nitrates and perchlorates in water to acceptable levels, extending the resin's operational lifetime and maintaining removal efficiency, while minimizing contamination and regeneration-related capacity loss.
Implementation Method 1
contacting the fluid with a single resin to cause the single resin to bond to the nitrates and perchlorates
Implementation Method 2
regenerating the single resin by a regeneration process including contacting the single resin with a salt solution, wherein regenerating removes a substantial portion of the nitrates contained within the single resin but does not remove a substantial portion of the perchlorates contained within the single resin
Data Source
AI summary
A method as described herein may include contacting a fluid with a single resin to cause the single resin to bond to nitrates and perchlorates contained in the fluid. The method may regenerate the single resin by a regeneration process comprising contacting the single resin with a salt solution, wherein regenerating removes a substantial portion of the nitrates contained within the single resin but does not remove a substantial portion of the perchlorates contained within the single resin, wherein the single resin comprises a nitrate-specific resin and does not comprise a perchlorate-specific resin.