Device for monitoring settling performance of activated sludge in situ and detection method

A technology of activated sludge and settling performance, applied in sampling devices, using sound waves/ultrasonic waves/infrasonic waves to analyze fluids, instruments, etc., can solve problems such as inability to monitor

Pending Publication Date: 2021-07-30
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can realize the automatic monitoring of sludge settling performance in the process of sewage treatment, but this method can only monitor the sedimentation ratio of sludge in real time, but cannot monitor the important indicators MLSS and SVI of sludge settling performance

Method used

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  • Device for monitoring settling performance of activated sludge in situ and detection method
  • Device for monitoring settling performance of activated sludge in situ and detection method
  • Device for monitoring settling performance of activated sludge in situ and detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The effluent quality of a certain municipal sewage cannot meet the requirements of Class I (A), and the aerobic tank has serious sludge bulking problems, so it is necessary to monitor the sludge characteristics in real time.

[0040] The specific steps are:

[0041] 1) Activated sludge sampling

[0042] Divide the target pool body into 3 areas, and sample each area separately; when sampling, collect samples at a depth of 0.5m from the liquid surface, and mix the collected 3 samples; the specific method of sampling is as follows: use The constant-current peristaltic pump is used for sampling. When sampling, the sampling port of the pump tube of the constant-current peristaltic pump is placed at the predetermined target position, and 200mL of activated sludge samples are extracted. The sampling flow rate is 10mL / min, and after each sampling, the Before the next sampling, it is necessary to turn on the peristaltic pump to extract about 2L of sewage from the sampling point...

Embodiment 2

[0052] The effluent quality of a certain municipal sewage cannot meet the requirements of Class I (A), and the aerobic tank has a slight sludge bulking problem, so it is necessary to monitor the sludge characteristics in real time.

[0053] The specific steps are:

[0054] 1) Activated sludge sampling

[0055] Divide the target pool body into 3 areas, and sample each area separately; when sampling, collect samples at a depth of 0.5m from the liquid surface, and mix the collected 3 samples; the specific method of sampling is as follows: use The constant-current peristaltic pump is used for sampling. When sampling, the sampling port of the pump tube of the constant-current peristaltic pump is placed at the predetermined target position, and 200mL of activated sludge samples are extracted. The sampling flow rate is 10mL / min, and after each sampling, the Before the next sampling, it is necessary to turn on the peristaltic pump to extract about 2L of sewage from the sampling point...

Embodiment 3

[0059] The effluent quality of a certain municipal sewage cannot meet the requirements of Class I (A). It is suspected that there is a problem of sludge bulking in the aerobic tank, and real-time monitoring of the sludge characteristics is required.

[0060] The specific steps are:

[0061] 1) Activated sludge sampling

[0062] Divide the target pool body into 3 areas, and sample each area separately; when sampling, collect samples at a depth of 0.5m from the liquid surface, and mix the collected 3 samples; the specific method of sampling is as follows: use The constant-current peristaltic pump is used for sampling. When sampling, the sampling port of the pump tube of the constant-current peristaltic pump is placed at the predetermined target position, and 200mL of activated sludge samples are extracted. The sampling flow rate is 10mL / min, and after each sampling, the Before the next sampling, it is necessary to turn on the peristaltic pump to extract about 2L of sewage from ...

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Abstract

The invention discloses a device for monitoring settling performance of activated sludge in situ and a detection method. The device comprises a cabin for placing a sample and an ultrasonic time domain reflectometer for determination and analysis, wherein a sample stagnation area is arranged inside the cabin body, and a sample inlet and a sample outlet are formed outside the cabin body; the sample inlet is communicated with the top of the sample stagnation area, and the sample outlet is communicated with a side wall of the sample stagnation area; a stirring device is arranged at the bottom of the sample stagnation area, and an ultrasonic probe is arranged at the top of the sample stagnation area; and the ultrasonic time domain reflectometer is in signal connection with the ultrasonic probe. The detection method comprises steps of sampling, stirring, ultrasonic treatment and data detection, and the sedimentation performance of the activated sludge is obtained by taking the longitudinal coordinate time displacement at the time point of 30 minutes as an index for measuring the sludge volume index of the activated sludge. The portable device disclosed by the invention can be used for measuring the settling performance of a sludge sample on a test site.

Description

technical field [0001] The invention belongs to an activated sludge process sewage treatment device and method, in particular to a device and method for in-situ monitoring of activated sludge settling performance by using an ultrasonic time domain reflectometer. Background technique [0002] Activated sludge method is one of the most widely used sewage biological treatment technologies, but it is prone to problems such as sludge bulking, sludge floating, sludge foam, etc., resulting in substandard effluent quality, and sludge treatment and disposal need to add a large amount of medicines and other issues. The problems of most activated sludge can be directly reflected in the settleability of activated sludge. At present, there are many methods for testing sludge settling performance, including traditional measuring cylinder visual method and weight difference method. For example, the patent with the publication number CN205067282A discloses a device for measuring the sludg...

Claims

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Application Information

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IPC IPC(8): G01N29/02G01N1/14
CPCG01N29/02G01N1/14G01N2291/02836Y02W10/10G01N1/38G01N29/032G01N2291/02416G01N2291/0251G01N29/222
Inventor 王瑾丰董德园胡海冬吴兵任洪强
Owner NANJING UNIV
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