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Method for determining influence of pH on nitrosobacteria by adopting mathematical model

A technology of nitrosifying bacteria and mathematical models, which is used in testing water, measuring devices, scientific instruments, etc., to promote development and innovation, improve vitality and sewage denitrification effect, and improve sewage treatment effect.

Inactive Publication Date: 2020-07-03
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Although the effect of pH on nitrosating bacteria is currently a research hotspot in the field of sewage treatment, there are few methods using mathematical models to study it

Method used

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  • Method for determining influence of pH on nitrosobacteria by adopting mathematical model
  • Method for determining influence of pH on nitrosobacteria by adopting mathematical model
  • Method for determining influence of pH on nitrosobacteria by adopting mathematical model

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Experimental program
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Effect test

Embodiment 1

[0031] A kind of method adopting mathematical model measurement pH to nitrosifying bacteria influence, comprises the steps:

[0032] (1) Under the condition that the sludge residence time (SRT) was 10d, 1L of activated sludge was taken from the continuous culture reactor for centrifugation pretreatment, and after being concentrated to 200ml, the suspended solids (SS 0 ) is 2.407g / L. Among them: the purpose of centrifugal pretreatment is to eliminate the interference of the original matrix and salt, and the activated sludge should be centrifugally cleaned for more than three times with distilled water. The method for measuring the concentration of suspended solids is to bake a certain volume of activated sludge in an oven at 105°C for 8 hours to remove water and weigh it to calculate its volume concentration.

[0033] (2) Set the pH gradient of the batch experiment, and use the phosphate buffer solution to control the pH in the BOD bottle of the batch experiment to be 4, 4.5, ...

Embodiment 2

[0041] The difference between embodiment 2 and embodiment 1 is:

[0042] A kind of method adopting mathematical model measurement pH to nitrosifying bacteria influence, comprises the steps:

[0043] In step (1), take the activated sludge whose sludge residence time (SRT) is 5d from the reactor to measure, and the concentration of suspended solids (SS) in the batch experiment BOD bottle is 0.061g / L, (1) calculate each Specific oxygen consumption rate SOUR of nitrosating bacteria under pH conditions (Table 2). Make a scatter diagram of the pH change and the specific oxygen consumption rate (SOUR) of nitrosating bacteria, and use the model equation to simulate, the simulation effect is as follows image 3 shown. Obtain the kinetic parameter value pH of the influence of pH on nitrosating bacteria UL = 6.7, pH LL = 1.5.

[0044] Table 2

[0045]

[0046] The inhibition parameters of pH to nitrosating bacteria measured by the present invention can be brought into the activa...

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Abstract

The invention relates to a method for determining the influence of pH on nitrosobacteria by adopting a mathematical model, and belongs to the field of sewage treatment. According to the method, the specific oxygen uptake rate (SOUR) under different pH conditions is measured, simulation is carried out by establishing a model equation, and the inhibition parameter value of the influence of pH on nitrosobacteria is determined. According to the invention, quantitative research can be carried out on the influence of pH on nitrosobacteria by using a mathematical model method. By determining the model parameters of the influence of the pH on the nitrosobacteria, the influence degree of the pH on the nitrosobacteria can be known, so that the growth environment of the nitrosobacteria is better optimized, and the activity of the nitrosobacteria and the sewage denitrification effect are improved. And basic data is provided for realizing intelligent water affairs while a nitrite bacteria mathematical model is perfected.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a method for measuring the influence of pH on nitrosating bacteria by using a mathematical model. Background technique [0002] In recent years, with the development of economy and society and the improvement of industrialization, a large amount of sewage discharge has seriously affected the ecological environment. Excessive nitrogen and phosphorus content is the main cause of water eutrophication. Water eutrophication seriously affects the water environment and water body functions. Rapid growth and reproduction of algae and plankton reduces the dissolved oxygen in the water body and causes a large number of aquatic organisms to die. Perform anaerobic decomposition to produce COD, H 2 S, NH 3 Wait, make the water black and smelly. Nitrogen is one of the main pollution factors, how to remove nitrogen in polluted water is an important issue in the field of sewage tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/18
CPCG01N33/1806G01N33/1866G01N33/188
Inventor 刘兵邵媛媛李一凡陈飞勇李冰洁王静吴小东赵振东田宇赵硕谭刚吴金柱
Owner SHANDONG JIANZHU UNIV