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Method for controlling short-travel nitrification and denitrification process in nitrosification stage

A short-range nitrification and denitrification technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high requirements for bacteria and difficulty in popularization and application

Inactive Publication Date: 2012-09-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the technical problem that the existing method for realizing the short-range nitrification and denitrification process in the nitrosation stage has high requirements on bacteria and is difficult to popularize and apply, and provides a method for controlling the short-range nitrification and denitrification process in the nitrosation stage

Method used

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  • Method for controlling short-travel nitrification and denitrification process in nitrosification stage
  • Method for controlling short-travel nitrification and denitrification process in nitrosification stage
  • Method for controlling short-travel nitrification and denitrification process in nitrosification stage

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specific Embodiment approach 1

[0019] Specific implementation mode one: a kind of method for controlling the short-range nitrification and denitrification process in the nitrosation stage of the present embodiment is carried out according to the following steps:

[0020] 1. Determination of water temperature T, pH value M, and dissolved oxygen concentration S at a certain moment in the short-range nitrification and denitrification process EA , the concentration of ammonia nitrogen Nitrite concentration Substrate degradation rate caused by ammonia oxidizing bacteria Substrate degradation rate caused by nitrite oxidizing bacteria The unit of T is °C, I FNA and I FA The unit is mgN / L; and The unit is mgN / (mgVSS·d); S EA The unit is mgDO / L, and The unit is mgN / L;

[0021] Two, press Calculate the ratio f of free ammonia to ammonium nitrogen FA (M), then press Calculate the ratio f of free nitrous acid to nitrous nitrogen FNA (M), then pass Calculate the free nitrous acid concentratio...

specific Embodiment approach 2

[0030] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the operating parameters of the short-range nitrification and denitrification process are adjusted in step eight: the concentration S of dissolved oxygen is adjusted by adjusting the aeration EA . Others are the same as in the first embodiment.

specific Embodiment approach 3

[0031] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the operating parameters of the short-range nitrification and denitrification process are adjusted in step eight: the concentration of ammonia nitrogen is increased by adding ammonium sulfate Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for controlling a short-travel nitrification and denitrification process in a nitrosification stage, which relates to a method for controlling the nitrosification stage, and aims at solving the technical problems that the conventional method for controlling the short-travel nitrification and denitrification process in the nitrosification stage has a high requirement on bacteria and is difficult to be popularized and applied. The method comprises the following steps of: measuring the temperature, the pH value, the concentrations of free nitrite acid, free ammonia, dissolved oxygen, ammonia nitrogen and nitrite nitrogen, the substrate degradation rate caused by ammonia oxidizing bacteria and the substrate degradation speed caused by nitrate oxidizing bacteria in water at a certain moment in the short-travel nitrification and denitrification process; then calculating boundary conditions in the nitrosification stage, and comparing the boundary conditions with test values; and if the comparison result meets the formula, not adjusting running parameters of the short-travel nitrification and denitrification process, otherwise, adjusting the running parameters, and calculating the conditions again until the result meets the formula, thus finishing the control over the nitrosification stage in the short-travel nitrification and denitrification process. The method can be applied to sewage treatment in the field of environmental protection.

Description

technical field [0001] The invention relates to a method for determining the boundary conditions of biological nitrosation. technical background [0002] With the development of industrial and agricultural production and the improvement of people's living standards, the discharge of nitrogen-containing organic matter in my country has increased rapidly, the water environment has deteriorated sharply, and the problem of water eutrophication has become increasingly prominent. Biological denitrification has become a particularly important task. [0003] Biological denitrification is a relatively economical method to remove ammonia nitrogen in water. Its principle is to simulate the cycle of nitrogen in the natural ecological environment, and use the combined action of nitrifying bacteria and denitrifying bacteria to convert ammonia nitrogen in water into nitrogen to achieve the purpose of denitrification. The currently widely used denitrification processes such as A / O, SBR, and...

Claims

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Application Information

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IPC IPC(8): C02F3/34
Inventor 李相昆方兴张杰
Owner HARBIN INST OF TECH
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