Wastewater Pump Coordination via Centralized Level Control
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Solution Overview
Problem
Wastewater treatment systems face inefficiencies due to uncoordinated pump operations, leading to increased energy costs, equipment wear, and potential overflows, as pumps run inefficiently and simultaneously, causing higher pressures and irregular flow rates that disrupt biological treatment processes and result in sediment accumulation.
Innovation Solution
A centralized system that uses sensors and transceivers to communicate and manage pump operations across multiple stations, optimizing the number of pumps in use based on wastewater levels and flow rates, prioritizing pumps by proximity to the treatment plant and adjusting operational levels to balance flow during peak and off-peak times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pumps operate independently without coordination, then each pump can respond quickly to local wet well level changes, but simultaneous pump operations cause high head pressure in the force main, reducing overall system efficiency and increasing energy consumption
Solution Approach 1:
The patent combines multiple independent pump station operations into a coordinated system through a central controller that receives level signals from all wet wells and activates pumps in a prioritized sequence, merging previously independent operations into a unified energy-efficient system
Solution Approach 2:
The system performs preliminary actions by pre-establishing a priority sequence for pump activation based on wet well levels and force main pressure conditions, allowing pumps to be activated in an optimal order that prevents excessive pressure buildup and reduces overall energy consumption
2Reliability
If multiple pumps operate simultaneously to handle peak wastewater inflow, then wet well overflow is prevented, but pump wear increases and equipment lifespan decreases
Solution Approach 1:
The system pre-establishes a pump activation sequence that prioritizes certain pumps over others based on operational conditions, allowing the system to prevent wet well overflow while distributing wear more evenly across the pump fleet through planned sequential operation
Solution Approach 2:
The central controller dynamically changes operational parameters by adjusting which specific pumps are activated based on real-time conditions, varying the operational load distribution among pumps to extend overall system lifespan while maintaining reliable overflow prevention
3Ease of operation
If pumps are activated based on fixed predetermined levels, then pump operation is simple and reliable, but the system cannot adapt to varying flow rates and peak demand periods, resulting in inefficient operation
Solution Approach 1:
The system implements feedback by having the central controller continuously monitor wet well levels from all pump stations and force main pressure conditions, using this real-time information to dynamically adjust pump activation decisions and optimize system efficiency while maintaining operational simplicity
Solution Approach 2:
The patent introduces dynamics by transitioning from fixed predetermined pump activation levels to a dynamic control system that adjusts pump operation based on real-time feedback from level sensors and pressure transducers, allowing the system to adapt to varying flow rates and peak demand periods
4Speed
If the force main operates under high head pressure from simultaneous pump operations, then wastewater is moved quickly through the system, but sediment accumulates in the main and treatment plant capacity is reduced
Solution Approach 1:
The system performs preliminary actions by pre-coordinating pump activation sequences to avoid simultaneous operation, thereby preventing excessive head pressure buildup that would cause sediment accumulation while still maintaining adequate wastewater transport speed through planned sequential pumping
Data Source
AI summary
A system is provided to control fluid flow in a wastewater treatment system through wastewater level manipulation. The wastewater treatment system may include a wastewater treatment plant connected to a plurality of pump stations by a main. Each of the plurality of pump stations may include a wet well with a pump therein. The system may include a central server in communication with a sensor to sense a level of wastewater within the wet well. The pump may be automatically moved to an on position when the level of the wastewater in the wet well is at or above a first level and may be automatically moved to an off position when the level of the wastewater in the respective wet well is at or below a pump cutoff level. The central server may systematically manipulate the first level to selectively set the level of wastewater within the wet well.