Circulating Water Fee Calculation Using Wastewater Quality
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Solution Overview
Problem
Existing charging devices for water utilization systems require a public waterworks and sewerage system infrastructure, which limits their applicability to novel circulating-water utilization systems that operate independently and serve areas with thousands of inhabitants by calculating fees based solely on wastewater amount, neglecting water quality.
Innovation Solution
A charging device for a circulating-water utilization system that includes a wastewater amount measuring unit, water-quality measuring unit, and a circulating-water fee calculating part, which calculates fees based on both the amount and quality of wastewater discharged by each water consumer, using a wastewater-processing unit price adjusted by water-quality indexes and pollution factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fees are calculated based solely on wastewater amount using existing charging devices, then the calculation method is simple and compatible with existing waterworks and sewerage systems, but it does not reflect the actual purification costs and is unfair to water consumers who discharge high-pollution wastewater
Solution Approach 1:
The patent changes the parameters used for fee calculation from only wastewater amount to include both wastewater amount and water quality indexes (such as BOD, COD, T-N, T-P). This allows the fee calculation to reflect actual purification costs more accurately by adjusting the wastewater-processing unit price based on pollution levels, while maintaining a relatively simple calculation framework.
Solution Approach 2:
The patent introduces water quality measurement feedback into the fee calculation system. By measuring water quality indexes and using them to adjust the wastewater-processing unit price, the system creates a feedback loop where pollution levels directly influence charging rates, encouraging water consumers to reduce pollution while ensuring fair cost allocation.
2Adaptability or versatility
If a novel circulating-water utilization system is constructed independently from existing waterworks and sewerage systems, then it can serve areas with thousands of inhabitants and provide integral processing of clean water and sewage, but existing charging devices are not compatible and require development of new fee calculation methods
Solution Approach 1:
The patent segments the fee calculation into distinct components: wastewater amount measurement, water quality index measurement, and circulating-water fee calculation based on both parameters. This segmentation allows the system to handle independent circulating water utilization while maintaining manageable complexity through modular measurement and calculation elements.
Solution Approach 2:
The patent creates a universal fee calculation system that can accommodate the novel circulating-water utilization system's integral processing of clean water and sewage. By designing a multi-functional charging device that measures both amount and quality, the system becomes adaptable to independent water management scenarios while providing comprehensive fee calculation capabilities.
3Ease of operation
If water quality is not considered in fee calculation, then the charging device is easier to operate and maintain, but water consumers discharging high-pollution wastewater are not charged appropriately for the higher purification costs they impose
Solution Approach 1:
The patent enables the charging device to automatically measure water quality indexes and calculate adjusted fees without requiring manual intervention. The system self-services by integrating water quality measurement and automatic price adjustment, maintaining ease of operation while ensuring fair and reliable fee calculation based on actual pollution levels.
Data Source
AI summary
A charging device 10 of a circulating-water utilization system 1 to be constructed in a specific area includes: a wastewater amount measuring unit 18a configured to individually measure an amount of wastewater discharged from each of water consuming members; a water-quality measuring unit 18b configured to individually measure a water-quality index related to a water quality of the wastewater discharged from each of the water consuming members; and a circulating-water fee calculating part 10A configured to calculate a circulating-water fee of each of the water consuming members on the basis of the amount and the water quality of the wastewater discharged from each of the water consuming members.