Wastewater Separation via Fluid-Dynamic Profiles
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Solution Overview
Problem
Current wastewater treatment plants are inefficient in separating inorganic materials like sand from the fluid part, resulting in suboptimal separation yields.
Innovation Solution
A wastewater treatment plant design featuring a central tank with two fluid-dynamic profiles that utilize the Coanda effect to guide solid particles away from the liquid, creating preferential flow channels for optimal separation, reducing plant size and complexity while enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional settling tanks are used to separate solids from wastewater, then the separation process can be implemented, but the separation yield of inorganic material is low and the plant size is large
Solution Approach 1:
The patent applies curved surfaces in the form of fluid-dynamic profiles (convex and concave) that guide the wastewater flow along curved paths. This curvature creates centrifugal forces and flow separation that enhance the detachment of solid particles from the liquid, improving separation yield while maintaining a compact plant configuration
Solution Approach 2:
The invention utilizes hydraulic principles by creating specific flow patterns through the fluid-dynamic profiles. The curved surfaces generate hydraulic jumps and flow separation zones that facilitate particle-liquid separation, achieving high separation efficiency through fluid dynamics rather than large gravitational settling zones
2Productivity
If conventional settling tanks are used to separate solids from wastewater, then the separation process can be implemented, but the plant structure becomes complex
Solution Approach 1:
The separating equipment is divided into distinct functional zones created by the fluid-dynamic profiles: an inlet zone with convex profile for initial flow guidance, a separation zone with concave profile for particle detachment, and an outlet zone. This segmentation allows each zone to perform its specific function efficiently while keeping the overall structure compact and manageable
Solution Approach 2:
The curved fluid-dynamic profiles simplify the structure by replacing complex mechanical separation mechanisms with smooth geometric surfaces that naturally guide flow and particles. The convex and concave surfaces create the necessary flow patterns without requiring additional moving parts or complex internal structures
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 design achieves high efficiency in solid-liquid separation by guiding solid particles into collection channels, reducing plant dimensions and structural complexity, and improving separation yields.
Implementation Method 1
US 5 470 489 describes a settling tank to separate solids from waste water using the Coanda effect: the waste water is pressurized through a gap between curved surfaces
Data Source
Figure 1
AI summary
A wastewater treatment plant (10). The plant (10) comprises separating equipment (100) for separating the solid particles from the liquid part. The separating equipment (100) comprises, in turn, an inlet opening (101D*) and an outlet opening (101E*), which are substantially arranged in line along a common directrix (X). In the fluid mass (MF), there is present at least one fluid-dynamic profile (70, 75), which is suited to help the detachment of the solid particles from the liquid part. The plant is characterised in that the separating equipment (100) comprises, furthermore, a second fluid-dynamic profile (75). The two fluid-dynamic profiles (70, 75) define between one another a first preferential flow channel (77) of the liquid mass.