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A modeling method for the kinetic model of nitrous oxide in the biological denitrification process of sewage

A kinetic model and sewage biological technology, applied in the field of sewage biological treatment and resource utilization, can solve the problems of less research, insufficient description of production pathways, and insufficient analysis of key factors, so as to save modeling time and cost, and have clear thinking simple effect

Active Publication Date: 2019-07-12
UNIV OF JINAN
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Problems solved by technology

In contrast, foreign countries for N 2 The research on the O kinetic model is relatively in-depth, but there are still many problems to be solved, such as the N 2 The description of the production pathway of O is not comprehensive enough to affect N 2 The key factor analysis generated by O is not deep enough, etc.
At the same time, through computer simulation N 2 There are relatively few studies on the production of O

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  • A modeling method for the kinetic model of nitrous oxide in the biological denitrification process of sewage
  • A modeling method for the kinetic model of nitrous oxide in the biological denitrification process of sewage

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Embodiment Construction

[0014] figure 1 It is a schematic flow chart of the modeling method of the nitrous oxide kinetic model in the biological denitrification process of sewage proposed by the present invention. 2 Each step in the modeling method of O kinetic model:

[0015] Step (1): Comprehensive analysis of N 2 The production mechanism and pathway of O, using the half-reaction equation to accurately express N 2 O production mechanism and pathway.

[0016] Specifically, by analyzing and summarizing experiments and literature data, it can be known that when environmental conditions affect the activity of NOR biological enzymes, it will lead to N 2 generation of O, and N 2 O production pathways mainly include AOB denitrification, heterotrophic denitrification, NOH chemical analysis and microbial decay process. In clear N 2 After the production mechanism and pathway of O, the half-reaction equation can be used to accurately express the N 2 O production mechanism and pathway.

[0017] Step (2...

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Abstract

The invention discloses a modeling method for a nitrous oxide kinetic model in the sewage biological denitrification process. The modeling method includes the following steps that 1, a N2O generation mechanism is comprehensively analyzed and accurately expressed with a half-reaction equation; 2, working conditions affecting N2O generation are comprehensively analyzed, and a key environmental factor is determined; 3, the N2O kinetic model based on an activated sludge model 3 (ASM3) is constructed based on ASM3 according to the determined half-reaction equation and the key factor; 4, unknown parameters in the modeling process are estimated and recognized by using an MATLAB optimization algorithm, and the confidence interval of the unknown parameters is determined; 5, MATLAB mathematical software is used for dynamically simulating the N2O kinetic model, sensitivity of the various parameters is analyzed, and the key parameter greatly affecting the model is found and modified; 6, the MATLAB is used for constructing N2O kinetic model dynamic simulation software. The modeling method has the advantages that the N2O generation mechanism is expressed more clearly, and predictive ability is more accurate.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment and resource utilization, and in particular relates to a modeling method for a kinetic model of nitrous oxide in a sewage biological denitrification process. Background technique [0002] Nitrous oxide (N 2 O) As a strong greenhouse gas, it can cause the destruction of the ozone layer and promote the formation of acid rain. Under certain meteorological conditions, it can also be easily converted into secondary particulate pollutants to aggravate the smog. Therefore N 2 O has a compound pollution effect on the atmospheric environment. Biological wastewater treatment processes are considered to be N 2 One of the important anthropogenic sources of O production. Therefore, based on N 2 O generation mechanism builds N 2 The O kinetic model has important theoretical research significance and engineering application value. [0003] At present, there is still no domestic specifi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 张守彬刘玉田邱立平张媛媛王嘉斌谢康钟敬秀
Owner UNIV OF JINAN
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