A self-adaptive parameter calibration method for activated sludge model of sewage biological treatment
An activated sludge model, sewage biological treatment technology, applied in special data processing applications, electrical digital data processing, aerobic and anaerobic process treatment, etc.
Active Publication Date: 2017-11-14
YANGZHOU UNIV
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[0005] In order to solve the above problems, the present invention provides a new adaptive calibration method that can continuously update the parameters of the activated sludge mathematical model to solve the shortcomings of the existing model parameter calibration methods
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[0061] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0062] Step 1: According to its application requirements (degradation of organic matter, nitrification, denitrification, and biological absorption and release of phosphorus) and the structure of sewage biological treatment facilities, establish a mathematical model of activated sludge, which can directly adopt the ASM proposed by the International Water Quality Association (IWA) Series models, or simplified or modified as required. The general format of the established mathematical model is as follows:
[0063]
[0064] Where x is the model components, such as easily degradable chemical oxygen demand (COD), slowly degradable COD, particulate and dissolved inert COD, ammonia nitrogen, nitrate nitrogen, heterotrophic bacteria, aerobic bacteria concentration, etc., its complete expression and It is related to the type of mathem...
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The invention provides a method for calibrating adaptive parameters of an activated sludge model for sewage biological treatment. The specific steps are as follows: step 1, establishing a mathematical model of activated sludge; step 2, analyzing the sensitivity of mathematical model parameters; Classification of model parameters, according to the analysis results of step two, the model parameters are divided into non-sensitive model parameters and sensitive model parameters; step four, setting different measurement sensor combinations; step five, adaptive calibration of activated sludge model parameters, according to step The four determined sensor combinations apply the extended Kalman filter and random walk theory to estimate the sensitive model parameters, which can continuously calibrate the model parameters and make the model prediction more accurately reflect the sewage biological treatment process. In the determination of different sensor combination conditions After the parameter estimation effect below, select the sensor combination with lower cost and better parameter estimation effect as practical application.
Description
technical field [0001] The invention belongs to a sewage treatment technology, specifically a method for self-adaptive online calibration of an activated sludge model in a sewage biological treatment process. Background technique [0002] Sewage biological treatment is generally called activated sludge method. Since the invention of activated sludge method in the early 20th century, it has been the main method of domestic sewage treatment in all countries in the world. The requirements for sewage treatment are also getting higher and higher, from the degradation of organic pollutants to the removal of nitrogen and phosphorus nutrients, and then developed to the third stage of advanced treatment, the complexity of which has been difficult to express with simple mathematical equations. The development of activated sludge mathematical model provides a means for accurately describing the process of sewage biological treatment. The mathematical model of activated sludge is based...
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IPC IPC(8): G06F19/00C02F3/30
Inventor 吴军何成达蒋新跃杨益军于林堂严刚
Owner YANGZHOU UNIV