Wastewater Treatment Using Three-Output Axial-Flow Separator
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Solution Overview
Problem
Conventional municipal wastewater treatment processes require intermediary biological processes and sedimentation stages, which are time-consuming, costly, and resource-intensive, and often result in large facility footprints.
Innovation Solution
The use of a three-output Richter-type separator to separate municipal wastewater into lighter-than-water and heavier-than-water solids streams, allowing for direct feeding into a mechanical sludge-dewatering stage without biological processes or sedimentation, and subsequent filtration and disinfection without intermediary steps, potentially reducing the need for extensive infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional municipal wastewater treatment processes are used including primary sedimentation, secondary biological treatment, and tertiary treatment, then contaminants are removed and water is purified, but facility footprint becomes large, construction and operational costs increase, and treatment time is extended
Solution Approach 1:
The invention segments the wastewater treatment process into distinct density-based separation stages using multiple centrifugal separators. The first separator divides wastewater into lighter-than-water and heavier-than-water streams, while a second separator further processes one of these streams. This segmentation allows each stage to target specific contaminant types, achieving comprehensive purification without requiring large sedimentation tanks or extended biological treatment facilities.
Solution Approach 2:
The invention replaces conventional mechanical sedimentation systems with centrifugal separation technology. Instead of using gravity-based sedimentation tanks that require large footprints, the system employs centrifugal force generated by rotating separators to achieve rapid separation of contaminants by density. This mechanical substitution dramatically reduces the space required for treatment while maintaining or improving purification effectiveness.
2Manufacturing precision
If conventional wastewater treatment with multiple stages is implemented, then water quality standards are met, but construction, operational, and maintenance costs increase significantly
Solution Approach 1:
The invention replaces costly biological treatment systems and chemical processes with centrifugal separation technology. By using density-based separation, the system eliminates or reduces the need for expensive aeration tanks, sludge digesters, and chemical dosing systems while achieving equivalent or superior water quality. The mechanical centrifugal separators have lower construction costs and reduced operational expenses compared to conventional multi-stage treatment facilities.
Solution Approach 2:
The invention changes the fundamental separation parameter from gravity-based sedimentation to centrifugal force-based separation. This parameter change enables rapid separation at compact scales, reducing both capital investment in large infrastructure and operational costs associated with maintaining extensive treatment facilities. The centrifugal process achieves separation in minutes rather than hours or days, reducing treatment time and energy consumption.
3Manufacturing precision
If intermediary biological processes and sedimentation stages are used, then contaminants are effectively removed, but treatment time is extended and process complexity increases
Solution Approach 1:
The invention replaces time-consuming biological processes and sedimentation stages with rapid centrifugal separation. Contaminants are separated from wastewater in minutes based on density differences, eliminating the hours or days required for biological degradation and gravitational settling. This mechanical substitution maintains high contaminant removal efficiency while dramatically reducing treatment time.
Solution Approach 2:
The invention skips the intermediary biological and sedimentation stages entirely by using direct centrifugal separation. The system rushes through the treatment process by applying centrifugal force to immediately separate contaminants by density, bypassing the slow biological decomposition and gradual sedimentation that characterize conventional treatment. This approach achieves effective contaminant removal without the time penalty of intermediate stages.
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 approach significantly reduces construction, operational, and maintenance costs, and can minimize facility footprint to as small as 20% of conventional systems, while achieving clear water output suitable for reuse or safe disposal.
Implementation Method 1
a three-output axial-flow type separator (e.g., a Richter-type separator) that separates solids in a water carrier into a lighter-than-water solids stream, a heavier-than-water solids stream, and a fluid stream
Implementation Method 2
the impeller having a decreasing axial pitch in the direction of fluid flow
Data Source
AI summary
Disclosed is a system and method for treating municipal and sanitary wastewater. The system includes a three-output axial-flow type separator that separates wastewater into at least three fluid streams according to the specific gravity of the solids within the fluid streams. The lighter-than-water and heavier-than-water solids streams are combined and the resultant combination capable of being mechanically dewatered without intermediary biological-process systems. The system advantageously simplifies municipal and sanitary wastewater treatment by potentially eliminating traditional primary and secondary treatment stages, and significantly reducing the system's operational footprint. The system and method can be scaled to very large municipal systems.