Self-Regulating Protein Skimmer With EC Foam Wetness Feedback
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Solution Overview
Problem
Protein skimmers face issues with over-skimming due to organic load fluctuations, leading to excessive water loss and compromised water quality, which cannot be effectively managed by existing technologies.
Innovation Solution
A self-regulating protein skimmer equipped with an EC sensor in the foam collection neck and surround, a controller, and a variable flow DC skimmer pump or motorized outlet port regulator, adjusts fluid flow rate based on foam wetness and organic load to prevent over-skimming and maintain optimal foam fractionation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If protein skimmer operates at optimal foam fractionation to efficiently remove organic waste, then waste removal efficiency is improved, but water loss increases due to over-skimming during organic load fluctuations
Solution Approach 1:
The patent employs an electrical conductivity (EC) sensor that continuously monitors the conductivity of liquid in the foam collection neck and provides feedback to a controller. The controller adjusts the skimmer pump flow rate based on this feedback to maintain optimal foam fractionation while preventing over-skimming. This closed-loop control system dynamically balances waste removal efficiency with water conservation by responding to real-time changes in organic load.
2Loss of substance
If protein skimmer operates at sub optimal foam fractionation to avoid over-skimming, then water loss is reduced, but waste removal efficiency deteriorates
Solution Approach 1:
The patent implements dynamic operation by continuously adjusting the skimmer pump flow rate based on real-time EC sensor readings. Rather than operating at a fixed sub-optimal setting, the system dynamically modulates the flow rate to match varying organic load conditions. This allows the skimmer to maintain optimal performance during high organic load periods while reducing flow during low load periods, thereby avoiding over-skimming without sacrificing waste removal efficiency when needed.
3Measurement precision
If EC sensor is deployed in foam collection neck for sensing foam wetness, then foam wetness detection is improved, but sensor reliability deteriorates due to bio-film coating over time
Solution Approach 1:
The patent replaces direct physical contact measurement with an electrical field-based measurement approach. The EC sensor measures electrical conductivity through the liquid film on the foam column rather than relying on mechanical or direct capacitive contact that would be severely affected by bio-film. This electrical field approach allows the sensor to penetrate or bypass the insulating bio-film layer and continue measuring the underlying liquid conductivity, thereby maintaining measurement precision while improving long-term reliability.
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 effectively prevents over-skimming and minimizes water loss by dynamically adjusting flow rates, ensuring consistent water quality and efficient waste removal.
Implementation Method 1
an electrical conductivity (EC) sensor for deployment in its foam collection neck for sensing foam wetness
Implementation Method 2
a skimmer pump for pumping an air/organic loaded water mixture into its reaction chamber
Implementation Method 3
Protein skimmers foam fractionate an air/organic loaded water mixture to organic loaded foam in a foam collection neck
Data Source
AI summary
Mains operated self-regulating protein skimmer including a skimmer pump for pumping an air/organic loaded water mixture into its reaction chamber, an electrical conductivity (EC) sensor for deployment in its foam collection neck for sensing foam wetness, and a controller for controlling fluid flow rate through the protein skimmer in response to the EC sensor's foam wetness readings. Fluid flow rate can be controlled either by a variable flow DC skimmer pump and/or a motorized outlet port regulator for controlling an outlet port's outlet port area.