Activated Sludge Tank Layout for Emergency Wastewater Bypass
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Solution Overview
Problem
Existing sewage treatment plants face difficulties in emergency operations without the need to shut down the entire system for repairs or maintenance, especially under conditions like dry weather with reduced inflow.
Innovation Solution
The sewage treatment plant is divided into two tanks (B1 and B2) connected via a P tank, allowing hydraulic connections to be cut off during emergencies, enabling wastewater to be accumulated and treated without shutting down the entire system, using a P tank that can function as a biological phosphorus elimination unit in summer and a B tank in winter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional single-snapshot models are used for state determination, then the model structure is simple, but the accuracy of state determination deteriorates due to inability to capture temporal dynamics
Solution Approach 1:
The patent transitions from static single-snapshot models to dynamic sequential models that process time-series data. The model architecture evolves to handle temporal dependencies through recurrent connections and hidden states that capture dynamic behavior patterns in electrochemical reactor data.
Solution Approach 2:
The patent implements a preprocessing stage that prepares time-series data before main processing. Data is collected, preprocessed, and formatted in advance to enable efficient sequential model processing, including feature extraction and data transformation steps that occur before the core state determination.
2Measurement precision
If more process data is collected and analyzed, then the state determination accuracy improves, but the computational complexity and processing time increase
Solution Approach 1:
The patent implements continuous state estimation through sequential processing of time-series data. The model continuously updates state predictions as new data arrives, maintaining continuous useful action rather than periodic batch processing, which improves responsiveness while managing computational load through efficient recurrent architecture.
Solution Approach 2:
The patent processes essential features and key temporal patterns rather than all possible data dimensions. The model focuses on extracting meaningful temporal dependencies and critical state indicators, performing partial action on the most relevant data aspects to balance accuracy with processing efficiency.
3Reliability
If simple models are used for state determination, then the ease of operation is high, but the reliability of state estimation deteriorates due to inability to capture temporal dependencies
Solution Approach 1:
The patent implements feedback mechanisms where model predictions are continuously compared with actual measurements, and errors are used to refine state estimates. The recurrent architecture provides internal feedback through hidden states that carry information across time steps, improving reliability through continuous self-correction and temporal context utilization.
4Speed
If traditional batch processing methods are used, then the computational resources required are lower, but the responsiveness to changing reactor conditions deteriorates
Solution Approach 1:
The patent implements periodic updating of state estimates at optimized intervals rather than continuous high-frequency processing. The model processes data in sequential batches or at predetermined time steps, providing periodic action that balances responsiveness with computational efficiency, updating states frequently enough to capture dynamics but not so frequently as to waste resources.
Data Source
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AI summary
The present invention relates to a method for carrying out biological purification of wastewater with the aid of activated sludge in a sewage treatment plant, the sewage treatment plant comprising: an activated sludge tank that can be ventilated (B tank), at least two sedimentation and recirculation tanks (SU tanks), and a tank for biological phosphor elimination (P tank), wherein the P tank is hydraulically connected with the B tank via one or more openings, wherein the B tank is divided into two tanks B1 and B2 (B1 tank and B2 tank) which are hydraulically connectable via the P tank, wherein each of the B1 tank and the B2 tank is continuously connected hydraulically to at least one SU tank, wherein the P tank comprises closure means to cut off the hydraulic connection between the P tank and the B1 tank and/or the B2 tank, and wherein each of the SU tanks comprises an overflow unit for draining the excess water in the sewage treatment plant, wherein in the event of an emergency, the hydraulic connection between the P tank and either the B1 tank or the B2 tank is cut off, and the waste water is then accumulated and lifted up in the tanks that are not cut off, and the treated wastewater can effluent via the overflow unit of the respective SU tank(s). The present invention also relates to a sewage treatment plant for carrying out said method.