Floating Filter Up-flow Filtration for Rainwater Overflow
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Solution Overview
Problem
Existing wastewater treatment facilities face challenges in efficiently handling initial rainwater overflows, which increase pollutant loads and overwhelm primary depositing reservoirs, leading to reduced treatment efficiency and high construction costs for separate rainwater treatment facilities.
Innovation Solution
A wastewater treatment apparatus that modifies an existing primary depositing reservoir into an up-flow high-speed filtration facility, incorporating a floating filter, sludge holding tank, biological treatment facility, and concentrator to treat initial rainwater overflows and primary wastewater simultaneously, eliminating the need for additional facilities and adjusting flow rates for target water quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate initial rainwater facility is provided at the existing wastewater treatment facility, then initial rainwater treatment efficiency is enhanced, but construction costs and installation costs increase significantly
Solution Approach 1:
The patent merges the initial rainwater treatment facility with the existing primary depositing reservoir by installing a floating filter that can be deployed within the reservoir. This allows the same facility to handle both常规 wastewater treatment and initial rainwater overflow treatment, eliminating the need for a completely separate facility and reducing construction costs while maintaining treatment efficiency
Solution Approach 2:
The floating filter system is designed to provide multi-functional capability, serving both as a primary treatment facility for regular wastewater and as an initial rainwater treatment facility when needed. The system can be deployed and removed flexibly, allowing the underlying primary depositing reservoir to serve dual purposes throughout the year
2Productivity
If the primary depositing reservoir is modified to an up-flow high-speed filtration facility, then both initial rainwater overflow treatment and primary treatment can be performed simultaneously, but the facility standard for filtration rate is exceeded
Solution Approach 1:
The system employs dynamic operation modes where the floating filter can be deployed at different times and configurations. During initial rainwater overflow events, the floating filter is deployed to provide high-speed filtration. During normal operations, the system operates in conventional primary treatment mode, allowing the facility to adapt its filtration rate to match operational needs while complying with design standards for each specific mode
3Quantity of substance
If 3Q flow rate is introduced to the primary depositing reservoir during rainfall, then initial rainwater overflow is treated, but the filtration rate exceeds the facility standard of 25 to 40 m2/m3/d
Solution Approach 1:
The treatment process is segmented into different stages and locations. The floating filter handles the high-volume initial rainwater overflow with high-speed filtration, while the underlying primary depositing reservoir continues to operate within its design filtration rate standards for conventional wastewater. This segmentation allows the system to handle 3Q flow rates during rain events without exceeding the design standards of the permanent infrastructure
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
Effectively removes pollutants from initial rainwater, maintains treatment efficiency, reduces construction and maintenance costs, and consistently achieves treated water quality even with varying flow rates and loads, without the need for separate facilities.
Implementation Method 1
an up-flow high-speed filtration facility (10) which filters a floating matter contained in wastewater using a floating filter
Implementation Method 2
a biological treatment facility (30) which removes a dissolved organic matter contained in water discharged from the up-flow high-speed filtration facility (10)
Data Source
AI summary
A wastewater treatment apparatus performs both initial rainwater overflow treatment and primary treatment. A wastewater treatment method according to the apparatus, the apparatus modifying an existing primary depositing reservoir to an up-flow high-speed filtration facility, the apparatus using a floating filter and biological filter paper applied to an existing depositing reservoir to perform an initial rainwater treatment. The apparatus can be applied to an existing wastewater treatment facility to eliminate the necessity of installing an additional facility for an initial rainwater treatment facility. The apparatus is further capable of adjusting the flow rate into a biological treatment facility to achieve a target water quality. The apparatus comprises: an up-flow high-speed filtration facility for filtering floating matter contained in wastewater using a floating filter; a sludge holding tank; a biological treatment facility for removing dissolved organic matter contained in the water discharged from the up-flow high-speed filtration facility; and a concentrator.