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Oxygen exposure control method and device in sewage treatment

A sewage treatment and control method technology, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., can solve problems such as waste, high cost, and reduced sewage treatment efficiency, and achieve accurate The effect of controlling and ensuring efficiency

Active Publication Date: 2019-05-21
BEIJING ETECHWIN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventor finds that the prior art has at least the following defects: 1) the first aeration method does not take into account the concentration change of dissolved oxygen in the oxygen tank, and the difference between the amount of aeration and the aerobic tank is easy to occur. The inconsistency of the actual required aeration volume leads to the reduction of sewage treatment efficiency due to insufficient aeration volume or the waste of cost caused by excessive aeration volume
2) The second aeration method, although the actual dissolved oxygen in the aerobic tank is considered, in actual operation, the concentration of dissolved oxygen in the aerobic tank is only qualitatively adjusted by increasing or decreasing the aeration volume , this method takes a certain amount of time to verify between the actual operation and the corresponding effect, and there is an operation delay, so the processing effect is not very ideal

Method used

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  • Oxygen exposure control method and device in sewage treatment

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Effect test

Embodiment 1

[0079] Figure 4 Oxygen exposure control method flow in sewage treatment provided by the embodiment of the present invention Figure 1 , the execution body of this method can be figure 1 or figure 2 In the device or module of the activated sludge detection system shown, the logical processing part can be executed by the control device 5, and the activated sludge detection system can be set in the sewage treatment control and diagnosis system including the aerobic tank. Such as Figure 4 As shown, the oxygen exposure control methods in this sewage treatment include:

[0080] S410, collect the actual dissolved oxygen concentration in the aerobic tank, and calculate the oxygen consumption rate OUR when the microorganisms in the aerobic tank degrade the organic matter in the aerobic tank based on the actual dissolved oxygen concentration.

[0081] Specifically, the figure 2 The activated sludge detection system shown is set in an aerobic tank, using image 3 The method sho...

Embodiment 2

[0094] Figure 5 Oxygen exposure control method flow in sewage treatment provided by the embodiment of the present invention Figure II , the method can be viewed as Figure 4 In the refinement of the steps of the method shown, the given aeration rate is calculated by using the principle of mass conservation of oxygen when the dissolved oxygen concentration in the aerobic tank is in a steady state. like Figure 5 As shown, the method includes:

[0095] S510, collect the actual dissolved oxygen concentration in the aerobic tank, and calculate the oxygen consumption rate OUR when the microorganisms in the aerobic tank degrade the organic matter in the aerobic tank based on the actual dissolved oxygen concentration.

[0096] The content of step S510 is the same as that of step S410 in the previous embodiment.

[0097] S520, based on OUR and the preset given dissolved oxygen concentration, using the principle of oxygen mass conservation when the dissolved oxygen concentration ...

Embodiment 3

[0135] Figure 8 The structure of the oxygen exposure control device in the ultra-sewage treatment provided by the embodiment of the present invention Figure 1 , the device can be used to execute the method steps described in the first embodiment above. Such as Figure 8 As shown, the device includes:

[0136] The data acquisition module 810 is used to collect the actual dissolved oxygen concentration in the aerobic pool, and calculate the oxygen consumption rate OUR when the microorganisms in the aerobic pool degrade the organic matter in the aerobic pool based on the actual dissolved oxygen concentration;

[0137] The data calculation module 820 is used to calculate the given aeration rate based on the OUR and the preset given dissolved oxygen concentration. The given aeration rate is for the microorganisms in the aerobic tank to degrade organic matter at the rate of OUR, and at the same time ensure that the aerobic tank The amount of aeration required to maintain the di...

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Abstract

The embodiment of the invention provides an oxygen exposure control method and device in sewage treatment. The method comprises the following steps: collecting actual dissolved oxygen concentration inan aerobic tank, and computing the oxygen uptake rate OUR when the microorganism in the aerobic tank degrades an organic matter in the aerobic tank based on the actual dissolved oxygen concentration;computing the given aeration rate based on the OUR and the preset given dissolved oxygen concentration, wherein the given aeration rate is the aeration rate required by the microorganism in the aerobic tank to maintain the organic matter degradation in OUR and ensure that the dissolved oxygen concentration in the aerobic tank is maintained at the given dissolved oxygen concentration; and adjusting the current actual aeration rate as the given aeration rate. Through the scheme provided by the embodiment of the invention, the aeration rate can be precisely given into the aerobic tank, thereby maintaining the dissolved oxygen concentration in the aerobic tank as the given value, and then guaranteeing the sewage treatment efficiency and realizing precise control.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of sewage treatment, in particular to a method and device for controlling oxygen exposure in sewage treatment. Background technique [0002] In the field of sewage treatment, the activated sludge method has been widely used in sewage treatment for hundreds of years. This method is a kind of aerobic treatment method that uses suspended microorganisms to treat organic sewage, that is, mainly uses the growth and metabolism of microorganisms to degrade pollutants, so it can be seen that the concentration of dissolved oxygen in the sewage reaction tank is controlled to treat microorganisms. The effect is quite large. [0003] In the prior art, an aeration device is mainly installed in the outer ditch area of ​​the aerobic tank to supply oxygen to the aerobic tank for microorganisms to degrade pollutants. At present, two aeration strategies are mainly used. The first is to use constant ...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 王景胜布吉红
Owner BEIJING ETECHWIN ELECTRIC
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