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An online detection device and detection method for ammonia nitrogen utilization rate of activated sludge

A technology of activated sludge and ammonia nitrogen, applied in the direction of material electrochemical variables, etc., can solve the problems of high cost, poor continuity, long time, etc., and achieve the effect of avoiding the straight line fitting formula

Active Publication Date: 2018-08-28
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the pretreatment of high-concentration activated sludge is also a challenge for instrument development
At present, the nitrification rate test of the determination process still needs to carry out manual sampling and testing in the laboratory, which takes a long time, high cost and poor continuity.

Method used

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  • An online detection device and detection method for ammonia nitrogen utilization rate of activated sludge
  • An online detection device and detection method for ammonia nitrogen utilization rate of activated sludge
  • An online detection device and detection method for ammonia nitrogen utilization rate of activated sludge

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Experimental program
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Effect test

Embodiment 1

[0077] Embodiment 1, activated sludge ammonia nitrogen utilization rate online detection device

[0078] Such as figure 1Shown is the activated sludge ammonia nitrogen utilization rate online detection device of the present invention, which includes a reaction system, an ammonia nitrogen dosing system, an ammonia nitrogen detection system, a process control system and a data acquisition and processing system;

[0079] The reaction system includes a bioreactor 1, which is a 400*400*100 (LHW) stainless steel cuboid container. The side wall of the reaction tank 1 is provided with three interfaces, and the reaction tank water inlet 2 (inner diameter 12mm), reaction tank circulation port 3 (inner diameter is 12mm) and reaction tank overflow port 4 (inner diameter is 20mm), sample inlet 2 is equipped with sampling peristaltic pump 5 (rated flow rate 1 ~ 5L / min, can be used in The reaction tank is filled within 5 to 10 minutes. In this example, the pipeline of 2L / min) is connected t...

Embodiment 2

[0085] Embodiment 2, using the activated sludge ammonia nitrogen utilization rate online detection device in embodiment 1 to conduct online detection of the activated sludge ammonia nitrogen utilization rate in the sewage denitrification process

[0086] A sewage treatment plant adopts the AAO process, with a treatment capacity of 600,000 tons per day. The designed hydraulic retention time is 1.5 hours in the anaerobic section, 3 hours in the anoxic section, and 8 hours in the aerobic section. The sludge reflux ratio is 100%, and the mixed liquor reflux ratio is 200%.

[0087] The activated sludge ammonia nitrogen utilization rate online detection device in embodiment 1 is installed at the starting point of the aerobic section in the biochemical reaction tank of the sewage treatment plant; Repeat the following steps (A)-(C) to carry out the ammonia nitrogen utilization rate of the activated sludge online test:

[0088] (A) Water intake stage: open the sampling solenoid valve,...

Embodiment 3

[0103] Embodiment 3, utilize the ammonia nitrogen utilization rate detection device in embodiment 1 to the mensuration of maximum ammonia oxidation rate

[0104] The device in Example 1 can be used to estimate the maximum ammonia nitrogen utilization rate, thereby evaluating the nitrification activity of activated sludge. Based on bioreaction kinetics, the actual AUR is calculated by:

[0105]

[0106] In formula (2), AUR is the utilization rate of ammonia nitrogen, AUR m is the maximum ammonia nitrogen utilization rate measured by the instrument, C AN is the concentration of ammonia nitrogen, DO is the concentration of dissolved oxygen, K AN and K DO is the model parameter.

[0107] Under the sufficient conditions of dissolved oxygen and ammonia nitrogen, the tested rate is the maximum ammonia oxidation rate. Since the oxygen supply in this embodiment is sufficient and the dissolved oxygen is relatively high, the influence of the dissolved oxygen in the formula (2) ca...

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Abstract

The invention discloses an activated sludge ammonia utilizing rate on-line detection device and a detection method. The device comprises a reaction system, an ammonia detection system, a process control system and a data acquisition and processing system. The reaction system includes a biological reaction tank; the biological reaction tank is internally provided with a membrane component, the water outlet of the membrane component is connected to the inlet of an ammonia detection measuring chamber; the ammonia detection system consists of the ammonia measuring chamber and an ammonia sensor; the process control system comprises a programmable logic controller and a data acquisition controller, the programmable logic controller is in connection with an inflow water peristaltic pump, an inflow water electromagnetic valve, a circulating electromagnetic valve, an evacuation electromagnetic valve, an aerator and a produced water suction pump; the data acquisition controller is in connection with the ammonia sensor; the data acquisition and processing system comprises a host computer, which is connected to the programmable logic controller and the data acquisition controller respectively. The device can rapidly measure the ammonia concentration and ammonia utilizing rate of sewage, and can further realize real-time prediction and risk assessment of a nitration process.

Description

technical field [0001] The invention relates to an online detection device and a detection method for the utilization rate of activated sludge ammonia nitrogen, belonging to the technical field of urban sewage treatment. Background technique [0002] The problems of water environment pollution and water eutrophication in my country are becoming more and more serious. Nitrogen is one of the main factors causing water eutrophication. At present, the common biological denitrification process in my country's sewage treatment plants generally strengthens the function of biological denitrification through the alternating transformation of anaerobic, anoxic and aerobic. The process consists of two steps: 1) nitrification reaction, which converts ammonia nitrogen into nitrite nitrogen or nitrate nitrogen under aerobic conditions; 2) denitrification reaction, which uses organic carbon sources as electron donors to convert nitrification The nitrite nitrogen or nitrate nitrogen produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26
CPCG01N27/26
Inventor 邱勇李冰田宇心施汉昌
Owner TSINGHUA UNIV