Knowledge selection-based sewage treatment process multi-objective optimization control method
A multi-objective optimization, sewage treatment technology, applied in various fluid ratio control, controller with specific characteristics, ratio control and other directions, can solve the complex biochemical reaction process, difficult to optimize and control the sewage treatment process, not objective and other problems
Pending Publication Date: 2020-07-10
BEIJING UNIV OF TECH
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Problems solved by technology
[0003] The biochemical reaction process in the sewage treatment process is complex, with the characteristics of nonlinearity and strong coupling, which makes it difficult to optimize and control the sewage treatment process
In addition, the sewage treatment process needs to reduce energy consumption as much as possible on the premise of ensuring the water quality of the effluent, so as to save costs. , to ensure the water quality while reducing energy consumption is an urgent problem to be solved
In response to this problem, the optimal control of the sewage treatment process came into being. In the actual sewage treatment process, the dissolved oxygen S O and nitrate nitrogen S NO Concentration has an important impact on effluent water quality and energy consumption, therefore, to obtain a suitable dissolved oxygen S O and nitrate nitrogen S NO The concentration optimization setting value is the premise and guarantee for improving water quality and reducing energy consumption. However, in dissolved oxygen S O and nitrate nitrogen S NO In the optimization process, some optimization algorithms only use the information generated by the current iterative process to optimize, which is not objective. Therefore, designing a reasonable optimization control method to optimize the control of sewage treatment can not only achieve the quality of effluent water in the sewage treatment process At the same time, it reduces energy consumption, saves resources and costs, and plays an important role in the safe and stable operation of the sewage treatment process.
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[0051] (1) Variables related to effluent water quality and energy consumption of sewage treatment: nitrate nitrogen S in the anaerobic final stage of the secondary treatment process NO and aerobic terminal dissolved oxygen S O , effluent mixed solid suspended matter MLSS, effluent ammonia nitrogen S NH , as an input variable;
[0052] (2) Using the radial basis kernel function, respectively establish the water quality model and energy consumption model of sewage treatment:
[0053]
[0054]
[0055] Among them, f 1 (t) is the outlet water quality model at time t, f 2 (t) is the energy consumption model at time t, s(t)=[S NO (t), S O (t), MLSS(t), S NH (t)] is the input variable, s(0)=[0.9, 1.7, 16.4, 2.56], b 1 (t) is the effluent water quality model f 1 Output offset of (t), b 1 (0)=0.29, b 2 (t) is the energy consumption model f 2 Output offset of (t), b 2 (0)=-1.25, I 1 =15 is the number of radial basis kernel functions in the effluent water quality model...
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The invention discloses a knowledge selection-based sewage treatment process multi-objective optimization control method, belongs to the field of sewage treatment, and aims to meet the effluent quality standard in the sewage treatment process and reduce energy consumption. The nitrate nitrogen SNO concentration and the dissolved oxygen SO concentration are optimized by adopting a multi-objective particle swarm optimization algorithm based on knowledge selection, and the PID controller is used for tracking and controlling the concentration of the nitrate nitrogen SNO and the concentration of the dissolved oxygen SO so that the problems that the effluent quality is difficult to reach the standard and the energy consumption is high in the sewage treatment process are solved, and the efficientand stable operation of the sewage treatment process is facilitated.
Description
technical field [0001] The present invention relates to a multi-objective optimal control method for sewage treatment process based on knowledge selection. Firstly, the dissolved oxygen S O and nitrate nitrogen S NO The concentration is optimized to improve the effluent quality of sewage treatment and reduce energy consumption. Then, use the PID controller to control the dissolved oxygen S O and nitrate nitrogen S NO The concentration is tracked and controlled, and finally the optimal control of the sewage treatment process is realized. The present invention can not only realize the quality of the effluent water in the sewage treatment process, ensure the efficient operation of the sewage treatment plant, but also reduce the energy consumption of sewage treatment and save the cost of sewage treatment. application value. Background technique [0002] The sewage treatment process uses artificially cultivated microorganisms to carry out a series of biochemical reaction proce...
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Login to View More IPC IPC(8): G05D11/13G05B11/42G06N3/00
CPCG05D11/138G05B11/42G06N3/006
Inventor 韩红桂张琳琳乔俊飞
Owner BEIJING UNIV OF TECH