Integrated Oxidation Ditch Central Island Design
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Solution Overview
Problem
Existing oxidation ditch designs are inefficient in terms of space usage and cost, with a separate deposition tank increasing overall area occupation and maintenance complexity, and lack flexibility for repair and operation.
Innovation Solution
An integrated oxidation ditch design with multiple round areas at the central island, sharing walls with the neighboring oxidation ditch, allowing for optimized layout, reduced area occupation, and flexible operation by incorporating deposition, anaerobic, and re-circulation zones, which also enhances denitrification rates and reduces capital expenditure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate deposition tank is designed outside the oxidation ditch, then the deposition function can be independently ensured, but the overall area occupied and device complexity increase
Solution Approach 1:
The patent merges the deposition tank with the oxidation ditch by designing the deposition tank at the central island position within the oxidation ditch boundary. This integration allows the deposition function to be independently ensured while reducing the overall area occupied, as the deposition tank shares the spatial envelope with the oxidation ditch rather than being externally separated.
Solution Approach 2:
The patent applies nesting by placing the deposition tank inside the oxidation ditch structure, specifically at the central island position. The deposition tank is nested within the oxidation ditch boundary, allowing it to utilize the existing spatial framework and reducing the total footprint of the wastewater treatment device.
2Reliability
If a separate deposition tank is designed outside the oxidation ditch, then the deposition function can be independently ensured, but the investment cost and construction complexity increase
Solution Approach 1:
The patent merges the deposition tank with the oxidation ditch by designing the deposition tank at the central island position within the oxidation ditch boundary. This integration allows the deposition function to be independently ensured while reducing the overall area occupied, as the deposition tank shares the spatial envelope with the oxidation ditch rather than being externally separated.
Solution Approach 2:
The central island structure serves multiple functions: it houses the deposition tank for solid-liquid separation, provides structural support for the oxidation ditch, and facilitates hydraulic flow control. This multi-functionality reduces construction complexity by eliminating the need for separate structural elements for each function.
3Adaptability or versatility
If the central island position is designed as a separate anaerobic area or oxidation ditch, then the functional zones can be clearly defined, but the area occupied and layout efficiency deteriorate
Solution Approach 1:
The patent applies local quality by designing different functional zones (anaerobic area, anoxic area, aerobic area, and deposition tank) with distinct hydraulic characteristics and operational parameters within the central island. Each zone is optimized for its specific function while collectively occupying minimal space through efficient spatial arrangement and shared boundaries.
4Reliability
If a round deposition tank is designed at the central island, then the deposition function is ensured, but the flexibility for repair and operation is reduced
Solution Approach 1:
The patent segments the central island into multiple functional zones (anaerobic area, anoxic area, aerobic area, and deposition tank) that can be independently accessed and maintained. This segmentation allows repair operations to be performed on specific zones without shutting down the entire oxidation ditch system, thereby maintaining operational flexibility.
Solution Approach 2:
The patent implements dynamic operational flexibility by designing the central island with adjustable hydraulic flow patterns and removable structural elements. The deposition tank and surrounding functional zones can be dynamically configured to allow maintenance operations while maintaining overall system functionality through flexible hydraulic control.
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 integrated design significantly reduces space and cost requirements, enhances operational flexibility, and improves denitrification efficiency while maintaining system functionality during maintenance, achieving a more harmonious and efficient water treatment process.
Implementation Method 1
oxidation ditch comprises various ditches of double-channel one, triple-channel one, quadruple-channel one and so on... designed as an anaerobic area, an anoxic area and an aerobic area
Implementation Method 2
the deposition tank is designed at the central island position of oxidation ditch... the combination of the deposition tank and the oxidation ditch form the tank body
Data Source
AI summary
An integrated oxidation ditch comprises a number of oval channels. There are two or more circular zones in the central island of the oxidation ditch, wherein, the two circular zones are tangential to the inner wall or share the inner wall with an adjacent channel. Wastewater of different zones is connected with others. The center island is used sufficiently in the oxidation ditch and all the channels and the deposition zone or the deposition zone and an anaerobic zone, inner/outer re-circulation zone are integrated together. So the oxidation ditch improves space utilization efficiency and reduces the land and cost.