Aeration Control for Precise Dissolved Oxygen in Wastewater Treatment
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Solution Overview
Problem
The manual control of dissolved oxygen concentration in aerobic wastewater treatment systems is inefficient, leading to high energy consumption, labor costs, and inaccuracies due to reliance on technician experience and complex adjustments of air valves and fan air quantity.
Innovation Solution
A deep learning model, specifically a long short-term memory (LSTM) network, is used to collect and analyze data from biochemical tanks, air valves, and fans to automatically adjust the air valve openings and fan air quantity, maintaining target dissolved oxygen concentrations within a stable range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual control method is used to adjust air valves and fan air quantity, then the dissolved oxygen concentration can be controlled, but the control accuracy is insufficient and the operation is complex
Solution Approach 1:
The patent replaces the manual mechanical control system with an automated control system comprising dissolved oxygen sensors, microcontrollers, and programmable logic controllers. The system automatically reads sensor data, processes it through control algorithms, and adjusts air valve openings and fan speeds without manual intervention, thereby improving control accuracy while reducing operational complexity
Solution Approach 2:
The control system performs self-adjustment by automatically monitoring dissolved oxygen levels through sensors and autonomously modifying air valve and fan operations based on predetermined control strategies. The system serves itself by eliminating the need for continuous manual monitoring and adjustment, achieving precise control through automated feedback loops
2Reliability
If continuous manual adjustment is performed to maintain dissolved oxygen concentration, then the dissolved oxygen level can be maintained, but time and labor are wasted
Solution Approach 1:
The system implements continuous automated monitoring and control of dissolved oxygen levels through permanently installed sensors and control equipment that operate without interruption. The dissolved oxygen sensors continuously measure oxygen levels, and the control system continuously adjusts air valves and fans to maintain target concentrations, eliminating the need for periodic manual interventions and ensuring uninterrupted reliable control
Solution Approach 2:
The system employs closed-loop feedback control where dissolved oxygen sensors continuously measure actual oxygen levels in the aeration tanks, transmit data to the control system, and trigger automatic adjustments when deviations from target values are detected. This feedback mechanism ensures reliable maintenance of dissolved oxygen concentrations while completely eliminating the time and labor required for manual monitoring and adjustment
3Ease of operation
If technician experience is used to adjust air quantity, then the control can be performed, but the accuracy is large error and insufficient
Solution Approach 1:
The patent replaces subjective technician judgment with objective automated control systems that use dissolved oxygen sensors and programmable algorithms to determine optimal air valve and fan settings. The control system processes sensor data through predetermined control strategies, eliminating reliance on technician experience and providing consistent, accurate control that is both simple to operate and highly precise
Solution Approach 2:
The system dynamically adjusts control parameters such as air valve opening degrees and fan speeds based on real-time dissolved oxygen measurements and predetermined control algorithms. The control system modifies these parameters automatically to achieve target dissolved oxygen concentrations with high accuracy, replacing imprecise experience-based adjustments with scientifically optimized parameter changes
Data Source
AI summary
The present invention belongs to the technical field of wastewater treatment and more specifically relates to a method for accurately controlling dissolved oxygen of an aerobic wastewater treatment system. The system integrates the functions of online monitoring and dissolved oxygen control of system parameters of a wastewater treatment plant, can acquire data of the dissolved oxygen concentration, openings of air valves, air quantity of a fan, influent quality and quantity of the wastewater treatment system in real time, automatically calculates ideal values of the air quantity of the fan and the openings of the air valves according to a target value of the dissolved oxygen concentration by a server, screens an optimal adjusting mode on the basis of a certain condition, and finally sends an instruction to the fan or the air valves to realize the accurate control of dissolved oxygen of the wastewater treatment system.