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Sequencing batch-based biotoxicity monitoring and early warning system and monitoring method

A sequencing batch biological, monitoring and early warning technology, applied in the direction of measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problem of difficult to consider the time of contact poisoning of activated sludge and toxic substances, biological toxicity monitoring and early warning stability It needs to be improved, it is difficult to truly reflect the OUR value, etc., to achieve the best mixing effect, strong anti-interference ability, and small mutual interference effect

Inactive Publication Date: 2014-02-19
陈亚松
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this continuous flow state monitoring and early warning method is difficult to consider the time of contact poisoning between activated sludge and toxic substances. Due to the continuous flow state, multiple different electrodes must be used to measure the dissolved oxygen value at different times, and multiple different electrodes monitor There is an instrument system error in dissolved oxygen. When there are more dissolved oxygen indicators monitored at different times, the system error is greater. When the dissolved oxygen indicators are less at different times, it is difficult to truly reflect the OUR value.
Therefore, the accuracy and stability of the biotoxicity monitoring and early warning of the continuous flow process method based on the OUR principle need to be improved

Method used

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  • Sequencing batch-based biotoxicity monitoring and early warning system and monitoring method

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Embodiment 1

[0032] Such as image 3 As shown, based on the monitoring method of the sequential batch biotoxicity monitoring and early warning system, the steps are as follows:

[0033] Step 1: Injection into the mixing stage, the sewage filtered by the security filter 2 is injected into the sequencing batch reactor 5 through the sewage injection pump 4-1, and the activated sludge is injected into the sequencing batch reaction through the sludge injection pump 4-2 In device 5, the volume flow ratio of sewage is Q 1 : Q 2 The injection time is 1:1~4:1, the injection time is controlled at 30s, the activated sludge is concentrated sludge, and the sludge concentration MLSS is controlled at 8000~10000mg / L, so that the concentration of the mixed sewage and sludge is kept at 2000-4000mg / L, which is convenient for subsequent full contact and reaction.

[0034] Step 2: In the contact stirring stage, the stirring device 5-1 in the sequencing batch reactor 5 is started, so that the activated slud...

Embodiment 2

[0048] Embodiment 2 (as figure 2 with image 3 shown)

[0049] The following are the implementation steps of three parallel sequencing batch reactors

[0050] In order to shorten the monitoring feedback time of the sequencing batch biotoxicity monitoring and early warning system, multiple sequencing batch reactors can be connected in parallel for monitoring and early warning. In this example, three parallel sequencing batch reactors are used to illustrate the specific steps. Such as figure 2 Shown, three sequencing batch reactors are carried out respectively according to the step of embodiment 1.

[0051] With reference to the steps in Example 1, the sewage enters the first sequencing batch reactor with activated sludge after being filtered by a security filter, and the operating parameters are the same as in Example 1, such as the volume flow ratio Q of sewage 1 : Q 2 The injection time is 1:1~4:1, the injection time is controlled at 30s, the activated sludge is conce...

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Abstract

The invention provides a sequencing batch-based biotoxicity monitoring and early warning system and a monitoring method. The early warning system comprises a sewage system, a security filter, an active sludge system, a sewage injection pump, a sludge injection pump, a sequencing batch reactor, a dissolved oxygen electrode and a PLC (Programmable Logic Controller) system. The monitoring method comprises five stages: injection and mixing; contacting and stirring; aerating and oxygenating; reaction monitoring; and emptying and cleaning. The early warning system provided by the invention is best in reaction and mixing effects by adopting the principle of the sequencing batch reactor, and the devices are in a full closed state, so that the antijamming capability is strong. Therefore, the reaction is more efficient and the result is more accurate. Through the sequencing batch reaction method, the respiratory rate of the active sludge is measured and calculated in a same reactor by using a same dissolved oxygen electrode. Compared with reactors continuous in operation, the system is more efficient and accurate and avoids system errors by using a plurality of dissolved oxygen electrodes to monitor in conventional continuous operation, so that the system can be widely applied to online monitoring early warning of sewage toxicity.

Description

technical field [0001] The invention relates to a sequence-based batch-based biotoxicity monitoring and early warning system and a monitoring method, and belongs to the technical field of biotoxicity monitoring and early warning systems and monitoring methods. Background technique [0002] Activated sludge process is the main process in the field of urban sewage treatment. Most urban sewage is composed of domestic sewage and industrial sewage. The industrial sewage has complex components, which often contain toxic organic substances, heavy metals and other substances that are toxic to activated sludge microorganisms, resulting in unstable biological treatment process and even paralysis of the treatment system. In recent years, there have been frequent reports of industrial sewage causing severe impacts on urban sewage plants. For example, during the holidays of Kunshan North District sewage plant, copper ions in the water repeatedly caused long-term paralysis of the system; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00
Inventor 陈亚松吕席卷杨广文
Owner 陈亚松
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