Portable Concrete Washout Neutralization Unit
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Solution Overview
Problem
The disposal of alkaline washwater from concrete construction sites poses challenges due to its high pH level, leading to transportation risks and illegal landfill disposal, as existing solutions are inefficient and costly.
Innovation Solution
A portable unit equipped with a pH sensor and neutralizing agent controller using carbon dioxide to neutralize the alkaline washwater, allowing for on-site treatment and safe disposal, reducing transportation costs and spill risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If washout is transported to a tip for disposal, then the concrete solids can be disposed of, but the washwater cannot be disposed of in landfill and must be transported further, increasing costs and spill risks
Solution Approach 1:
The portable unit performs neutralisation of the washwater on-site before disposal, converting the harmful alkaline waste into safe water that can be disposed of in landfill. This preliminary treatment action eliminates the need for special waste water disposal facilities and prevents spill risks during transport to treatment facilities.
Solution Approach 2:
A neutralising agent is introduced as an intermediary substance to react with the alkaline washwater, transforming it from a harmful waste product into safe water. This intermediary chemical reaction enables the washwater to be disposed of in ordinary landfill rather than requiring specialized hazardous waste facilities.
2Ease of operation
If a portable unit with pH sensor and neutralising agent controller is used, then the washwater can be neutralised on-site, but the unit requires integration of multiple components (power supply, sensors, controllers, neutralising agent storage)
Solution Approach 1:
The portable unit merges multiple functional components - pH sensor, neutralising agent controller, power supply (battery), and neutralising agent storage - into a single integrated portable unit. This consolidation enables on-site treatment capability while managing the complexity through unified design rather than separate distributed systems.
Solution Approach 2:
The unit incorporates a pH sensor that automatically monitors the washwater acidity and triggers the neutralising agent controller to add the appropriate amount of neutralising agent when needed. This self-monitoring and self-regulating mechanism reduces the need for manual intervention and simplifies operation despite the integrated complexity of components.
3Ease of repair
If the neutralising agent and battery are sized to last the same amount of time, then maintenance is simplified, but the initial unit configuration must be carefully calculated
Solution Approach 1:
The unit is configured during manufacturing with the battery capacity and neutralising agent quantity carefully calculated to provide equivalent service life. This preliminary design action ensures that both components will be depleted or require replacement at approximately the same time, simplifying future maintenance scheduling and avoiding situations where one component becomes obsolete before the other.
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 portable unit effectively neutralizes alkaline washwater, enabling safe and cost-effective disposal, reducing transportation risks and improving maintenance efficiency by integrating power and neutralizing agents within a compact chamber.
Implementation Method 1
a pH sensor for measuring a pH level of the washwater
Implementation Method 2
a neutralising agent source for supplying a neutralising agent to the washwater to neutralise the washwater
Data Source
AI summary
A method of neutralising washout from concreting operations comprises the steps of : providing a unit (10) to contain the washout, providing the unit (10) with a store of a neutralising agent (44, 45), receiving the washout in the unit (10), and transferring a washwater component from the washout receiving region (21) of the unit (10) to a washwater containment region (14) of the unit (10), and supplying the neutralising agent to the washout in the washwater containment region (14) of the unit (10).