Richter-Type Separator for Wastewater Sludge Dewatering
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Solution Overview
Problem
Conventional municipal wastewater treatment processes require multiple stages, including biological processes and sedimentation, which are time-consuming, costly, and require significant space, making them inefficient for removing contaminants and achieving sufficient sludge concentration for dewatering.
Innovation Solution
The implementation of a three-output Richter-type separator that separates lighter-than-water and heavier-than-water specific gravity solids from municipal wastewater, allowing for direct feeding to a sludge dewatering device without intermediary biological or sedimentation processes, and producing clear water for membrane filtration without additional treatment stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional multi-stage treatment processes (primary, secondary, tertiary treatment) are used, then contaminants are removed and water is purified, but the process becomes time-consuming, costly, and requires significant space
Solution Approach 1:
The patent segments the wastewater treatment process into distinct density-based separation stages using multiple centrifugal separators. Instead of sequential biological and chemical treatment stages, the system divides solids removal into primary (heavy solids), secondary (light solids), and tertiary (fine solids) separation stages that can operate in parallel or series, significantly reducing overall process time and facility footprint while maintaining effective contaminant removal.
Solution Approach 2:
The patent replaces biological treatment processes (secondary treatment using microorganisms) and chemical precipitation processes with mechanical centrifugal separation systems. This substitution eliminates the need for aeration tanks, biological reactors, and chemical dosing systems, reducing both the time required for treatment and the complexity of biological/chemical control systems while achieving equivalent or superior solids removal.
2Manufacturing precision
If biological processes and sedimentation are used for solids removal, then contaminants are removed, but construction, operational, and maintenance costs increase
Solution Approach 1:
The patent replaces expensive biological treatment infrastructure (aeration systems, activated sludge processes) and chemical treatment systems with mechanical centrifugal separation technology. This substitution reduces capital costs by eliminating large biological reactors and operational costs by eliminating requirements for biological nutrients, chemical additives, and associated control systems, while achieving equivalent solids removal through density-based separation.
Solution Approach 2:
The patent changes the fundamental separation parameter from biological degradation and gravitational sedimentation to centrifugal force-based density separation. By operating centrifugal separators at optimized speeds and configurations, the system achieves rapid solids-liquid separation based on density differences, eliminating the slow biological processes and chemical reactions that drive conventional treatment costs.
3Manufacturing precision
If multiple treatment stages are implemented, then water quality is improved, but the treatment facility requires significant space
Solution Approach 1:
The patent segments the treatment train into compact centrifugal separation units that can be vertically stacked or arranged in a small footprint configuration. Each separator handles a specific density range of solids, allowing parallel processing that achieves high water quality without requiring the linear sequence of large primary clarifiers, secondary aeration tanks, and tertiary filtration systems that consume vast facility space.
Solution Approach 2:
The patent transitions from horizontal expansion of treatment facilities (sequential stages arranged in a line) to vertical integration of separation stages. Centrifugal separators can be stacked vertically or arranged in compact three-dimensional configurations, achieving multiple separation functions within a dramatically reduced facility footprint while maintaining high water quality through multi-stage solids removal.
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 by eliminating the need for biological processes and sedimentation, enabling a more compact treatment facility and improving the efficiency of wastewater treatment by directly processing the separated solids and water streams.
Implementation Method 1
a three-output Richter-type separator that separates lighter-than-water and heavier-than-water specific gravity solids from municipal wastewater
Data Source
AI summary
Disclosed is a system and method for treating municipal and sanitary wastewater that uses only mechanical devices and processes, which eliminates biological processes and settling tanks. The system includes a three-output Richter-type separator that separates wastewater into 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 sludge is mechanically dewatered without intermediary biological-process systems or sedimentation. The partially-clarified water component can be directly filtered by a membrane filter and optionally optically or chemically disinfected for reuse or disposal. The system advantageously simplifies municipal and sanitary wastewater treatment 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.