Cod control method of sbr biochemical reaction pool
A biochemical reaction and control method technology, applied in adaptive control, chemical instruments and methods, controllers with specific characteristics, etc., can solve the problems affecting the control accuracy of COD control methods and poor control effects, and achieve COD control accuracy. High, good control stability effect
Active Publication Date: 2021-02-23
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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Problems solved by technology
[0006] The core content of the COD control method of the traditional SBR biochemical reaction tank is to use the PID controller to control the frequency conversion fan to provide aeration to the SBR biochemical reaction tank. Considering the worst working condition of the PID controller, that is, the temperature of the SBR biochemical reaction tank and When the external environment such as humidity fluctuates violently, the control effect of the above-mentioned PID controller is relatively poor, which affects the control accuracy of the COD control method of the SBR biochemical reaction tank
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[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0018] Such as figure 1 As shown, the present embodiment provides a SBR biochemical reaction tank system adopting the above-mentioned COD control method, including a SBR biochemical reaction tank; a frequency conversion fan; an object identification system for judging the current SBR biochemical reaction tank working condition; a real-time monitoring SBR A COD sensor for the sewage COD value in the biochemical reaction tank; a subtractor that inputs the set COD value of the sewage and the real-time feedback COD value of the COD sensor, and uses the feedback signal summation to realize the subtraction operation and output; an input subtractor The output electrical signal control The PID controller of the frequency conversion fan and a robust PID controller that also inputs the output electrical signal of the subtractor to control the frequency conversion...
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The invention discloses a method for controlling COD of an SBR biochemical reaction pool. Its core content is to measure the object recognition system described in the mathematical model of the SBR biochemical reaction pool through a step experiment to monitor whether Kο, Tο and το are all at the original value. Fluctuate within ±30%, so as to judge whether the current SBR biochemical reaction tank is in normal working condition; if Kο, Tο and το all fluctuate within ±30% of the original value through the monitoring of the above-mentioned object identification system, the above-mentioned PID controller controls the frequency conversion fan work; otherwise, the robust PID controller controls the frequency conversion fan to work. The COD control method of the above-mentioned SBR biochemical reaction tank solves the technical problem of "improving the COD control accuracy of the SBR biochemical reaction tank". Compared with the existing technology, it has the advantages of high COD control accuracy and good control stability.
Description
technical field [0001] The invention relates to a COD control method, in particular to a COD control method of an SBR biochemical reaction tank. Background technique [0002] SBR is the abbreviation of Sequenced Batch Activated Sludge Process, which is an activated sludge sewage treatment technology operated by intermittent aeration. The core of SBR technology is the SBR reaction tank, which integrates homogenization, primary sedimentation, biodegradation, secondary sedimentation and other functions into one tank, without sludge return system. It is especially suitable for occasions with intermittent discharge and large flow changes. [0003] COD (Chemical Oxygen Demand) is a chemical method to measure the amount of reducing substances that need to be oxidized in a water sample. The oxygen equivalent of substances (generally organic matter) that can be oxidized by strong oxidants in wastewater, wastewater treatment plant effluent and polluted water. In the study of river ...
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IPC IPC(8): G05B13/04G05B13/02G05B11/42C02F3/12
CPCC02F3/1263C02F2209/08Y02W10/10
Inventor 张智焕马龙华
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG