Aquatic Total Alkalinity Measurement via pH Variation
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Solution Overview
Problem
Current methods for measuring total alkalinity in water treatment systems are complex, costly, and require reagents, making real-time and affordable measurements challenging, especially in semi-closed and closed aquatic systems like swimming pools and industrial water applications.
Innovation Solution
A system using a pH probe with a floating reference and periodic activation/deactivation to measure pH variations, allowing for the determination of total alkalinity without independent measurement devices or reagents, integrated with cloud-based data management and algorithms for predictive metrics and regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If industrial titration equipment or photo-colorimetric devices are used to measure total alkalinity, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent uses pH as an intermediary parameter to indirectly measure total alkalinity. Instead of directly measuring alkalinity with complex titration equipment, the system measures pH at two different points (before and after adding a known amount of acid) and calculates total alkalinity from the pH change. This intermediary approach simplifies the measurement system while maintaining accuracy.
Solution Approach 2:
The patent replaces mechanical/chemical titration systems with an electronic pH measurement system. Instead of using burettes, indicators, and manual titration procedures, the invention uses electronic pH sensors and automated acid dosing, substituting mechanical operations with electronic control and calculation.
2Measurement precision
If reagents and consumables are used for total alkalinity measurement, then measurement precision is improved, but loss of substance and operational cost increase
Solution Approach 1:
The system uses a floating reference electrode that automatically maintains its position and function without requiring manual intervention or replacement. The reference electrode floats on the water surface and self-adjusts to provide stable reference potential, eliminating the need for consumable reagents and reducing maintenance requirements.
Solution Approach 2:
The patent changes the measurement parameter from direct alkalinity measurement (requiring reagents) to pH measurement (using electronic sensors). By measuring pH before and after controlled acid addition and calculating alkalinity from the pH differential, the system eliminates the need for consumable chemical reagents while maintaining measurement precision.
3Device complexity
If simple test strips are used for alkalinity measurement, then device complexity is reduced, but measurement precision and reliability deteriorate
Solution Approach 1:
The patent implements continuous or near-continuous pH monitoring using electronic sensors, replacing discrete test strip measurements. The system continuously measures pH, automatically adds acid when needed, and calculates total alkalinity in real-time, providing continuous useful action rather than intermittent manual testing.
Solution Approach 2:
The system incorporates feedback control where pH measurements are continuously monitored, and acid dosing is automatically adjusted based on the measured pH values. This closed-loop feedback mechanism ensures accurate total alkalinity measurement while automatically compensating for variations in water composition and conditions.
4Measurement precision
If expert labor and dedicated tools are used for alkalinity measurement, then measurement precision is improved, but loss of time and operational cost increase
Solution Approach 1:
The system performs automated sample handling, acid dosing, pH measurement, and data calculation without requiring expert intervention. The floating reference electrode automatically positions itself, the system autonomously adds acid based on pH readings, and the controller automatically calculates total alkalinity, making the system self-sufficient and eliminating the need for skilled operators.
Solution Approach 2:
The patent replaces manual expert operations with automated electronic systems. Instead of requiring technicians to perform titration, interpret color changes, and calculate results manually, the system uses electronic pH sensors, automated dosing pumps, and computer algorithms to perform all measurements and calculations automatically.
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
Enables reliable, real-time, and cost-effective measurement of total alkalinity, reducing maintenance and skilled labor requirements while providing predictive insights and automated adjustments for stable pH control.
Implementation Method 1
a pH probe configured to measure pH at the boundary layer of a body of water
Implementation Method 2
using a probe and a floating reference (sometimes called 'solution earth' or 'liquid junction')
Data Source
AI summary
The aquatic total alkalinity measurement system (100) comprises:a pH probe (105) configured to measure pH at the boundary layer of a body of water,a probe controller (115), configured to sequentially activate and deactivate, or connect and disconnect, the pH probe,a pH measurement variation detection device (120), configured to detect a variation of pH measurement in a sequence of pH probe measurements, andan aquatic total alkalinity value determination device (125), configured to determine an aquatic total alkalinity value of the body of water as a function of the pH measurement variation detected, andpreferably a total alkalinity regulation unit, configured to increase or decrease the total alkalinity of the body of water as a function of the measured total alkalinity value and a target total alkalinity value.


