Measurement device and method for activated sludge respiratory rate

A technology of respiration rate and activated sludge, applied in the direction of analysis materials, instruments, etc., can solve problems such as system errors and increased operating costs of sewage treatment plants, and achieve the effect of realizing operating costs and realizing toxicity monitoring

Active Publication Date: 2019-04-16
海若斯(北京)环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the system error caused by the above-mentioned traditional method using the dissolved oxygen meter to calculate the respiration rate, and the frequent replacement of the dissolved oxygen meter membrane electrode and the replacement of the new dissolved oxygen meter caused by the increase in the operating cost of the sewage treatment plant under long-term use. A respiration rate calculation method based on the principle of microbial respiration and Henry's law, and an activated sludge respiration rate measurement device and method

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  • Measurement device and method for activated sludge respiratory rate
  • Measurement device and method for activated sludge respiratory rate
  • Measurement device and method for activated sludge respiratory rate

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Embodiment 1

[0039] Refer to attached figure 1 and 2 , an activated sludge respiration rate measuring device, comprising a reactor system, a device protection system, and a data detection and analysis system.

[0040] The reactor system includes a main reaction chamber 1, and a hole is opened above the main reaction chamber 1, respectively connected with a two-position three-way air valve 4, a pressure sensor 5 and connected to the atmosphere through a pipeline, and the two-position three-way air valve 4 is connected with a diaphragm air pump 3, The bottom of the main reaction chamber 1 is arc-shaped, and three holes are evenly opened around it for installing the aeration head 6 in the cavity, so that the aerobic microorganisms can fully and effectively perform respiration. The inlet and outlet sample holes are set in the center of the bottom.

[0041] The device protection system mainly includes a metal protective shell 2, the main function of which is to protect the main body reaction ...

Embodiment 2

[0050] A method for measuring the respiration rate of activated sludge, the method is applied to the device for measuring the respiration rate of activated sludge in embodiment 1, and the method comprises:

[0051] Step 1, sample injection, open the air valves F1 and F2, use the weight of the whole device to make the sludge in the aerobic tank enter the main reaction chamber 1, when the weight of the sludge in the main reaction chamber 1 plus the whole device is equal to the weight of the whole device When the buoyancy formed by the volume is reached, the sample injection is completed, and at this time, the gas valves F2 and F1 are closed in turn;

[0052] Step 2, reaction, open the valve body F4, at this time the valve body F3 is in a closed state, turn on the diaphragm air pump 3, and through the diaphragm air pump 3, the air in the cavity above the main reaction chamber 1 is injected into the sludge for aeration, thereby forming an internal Circulation, during which the pre...

Embodiment 3

[0064] Use the device of the present invention to carry out the endogenous respiration rate test, collect the activated sludge sample under the same condition simultaneously, measure the respiration rate with the Erlenmeyer flask airtight method, the experimental comparison results refer to the attached Figure 5 .

[0065] Under long-term monitoring, because the test period is long, the endogenous respiration fluctuates, but the endogenous respiration rate measured by the two methods can be consistent in the change trend, and the test results are basically the same, indicating that the device of the present invention can replace the closed traditional method.

[0066] The key parameters of this device are as follows: the reaction time is 1h, the air-water ratio in the main reaction chamber is 1:4, and the aeration rate is 4.6L / min.

[0067] In the case of an external carbon source, the pressure change of the chamber above the main reaction chamber 1 is as follows: Figure 6...

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Abstract

The invention discloses a measurement device and method for an activated sludge respiratory rate. The device comprises a reactor system, a device protection system and a data detection and analysis system, wherein the reactor system comprises a main body reaction chamber; a two-position three-way air valve and a pressure sensor are connected above the main body reaction chamber; the main body reaction chamber is communicated with atmosphere through a pipeline; the two-position three-way air valve is connected with a diaphragm air pump; the bottom of the main body reaction chamber is provided with a sample feeding and discharging hole; the device protection system comprises a metal protection shell; and the data detection and analysis system comprises a data collection end connected with the pressure sensor. By use of the method and the device, the accurate measurement of an OUR (Oxygen Uptake Rate) can be realized, an accurate BOD5 (Biochemical Oxygen Demand) value of one hour is calculated, the toxicity monitoring of an aerobic tank microorganism can be favorably realized, an aeration rate can be regulated and controlled according to detection data, and therefore, the optimization of operation cost is realized.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to an activated sludge respiration rate measuring device and method. Background technique [0002] The activated sludge method is the mainstream technology in the biological treatment of urban sewage. In the process of sewage treatment by the activated sludge method, the activated sludge respiration rate (OUR) is an important indicator of the microbial activity of the reactive activated sludge system, and it can characterize the aeration The actual oxygen demand of the tank plays an important role in process operation and aeration control. [0003] The current method of measuring OUR is mainly batch experiment method, including two methods of closed intermittent aeration and continuous aeration. Both are based on the mass balance between the oxygen supplement and consumption in the liquid phase to obtain OUR, and both have certain deficiencies. The former is due to insufficient oxyg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/00
CPCG01N7/00
Inventor 袁衍超高凌徐晶严夏李思安
Owner 海若斯(北京)环境科技有限公司
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