Wastewater Treatment Mechanical Cleaning Integration
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Solution Overview
Problem
Conventional wastewater treatment plants require large areas and spaces due to the spatial separation of mechanical and biological purification steps, and the low solids content of primary sludge necessitates extensive processing and dewatering, leading to inefficient use of resources.
Innovation Solution
Integrating a mechanical cleaning device, such as a fine screen with perforated drums or belts, above or within the reaction vessel for biological purification, allowing mechanical cleaning to occur before biological treatment, thereby reducing the space needed for mechanical cleaning and enhancing the efficiency of organic contaminant removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical cleaning and biological purification are performed in separate devices arranged next to each other, then each process can be optimized independently, but the total area and space requirement increases significantly
Solution Approach 1:
The patent combines the mechanical cleaning device and biological purification reaction vessel into a single integrated system. The mechanical cleaning device is positioned within the reaction vessel such that its boundary surfaces form part of the vessel's internal structure, allowing both processes to occur in the same spatial envelope and eliminating the need for separate adjacent devices.
Solution Approach 2:
The mechanical cleaning device is nested within the reaction vessel for biological purification. The cleaning device occupies the upper portion of the vessel while the biological purification occurs in the lower portion, creating a vertical nesting arrangement that maximizes space utilization.
2Productivity
If primary sludge with low solids content (2-5% by weight) is removed and processed, then mechanical cleaning can be performed, but extensive dewatering facilities and large processing volumes are required
Solution Approach 1:
The mechanical cleaning device performs preliminary removal of suspended matter and solids from wastewater before the biological purification process begins. By pre-cleaning the wastewater and removing solids at the boundary surfaces, the system prevents these solids from entering the biological purification zone, thereby reducing the volume of sludge that would otherwise require extensive dewatering processing.
3Manufacturing precision
If a fine screen device with small clear width (0.005-1 mm) is used for mechanical cleaning, then removal of undissolved substances is extensive, but the device complexity and space requirement increase
Solution Approach 1:
The mechanical cleaning device uses boundary surfaces with fine screen structures (clear width 0.005-1 mm) located at specific critical positions where wastewater enters and exits the biological purification zone. This localized application of fine screening at boundary surfaces achieves extensive solid removal without requiring the entire device to be complex, maintaining simplicity in non-critical areas.
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
This configuration minimizes the space required for wastewater treatment by integrating mechanical and biological processes, reduces the volume of sludge to be processed, and enhances the removal of suspended solids and organic contaminants, resulting in a more compact and efficient treatment plant.
Implementation Method 1
a device for mechanical cleaning, such as a fine screen with perforated drums or belts, above or within the reaction vessel for biological purification
Implementation Method 2
reaction vessel for biological purification of the waste water treatment plant
Data Source
Figure 1
Figure 2
Figure 3~4a
AI summary
The invention relates to a wastewater treatment system, in which an apparatus for mechanical purification is integrated into a reaction vessel for biological purification, to a sewage plant that comprises such wastewater treatment systems, and to a method for purifying wastewater. By arranging the apparatus for mechanical purification above the footprint of the reaction vessel for biological purification, the space and volume requirements of the system are reduced.