CN102689991A - Method for controlling short-travel nitrification and denitrification process in nitrosification stage - Google Patents

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

A kind ofly control the method that the short-cut nitrification and denitrification process is in the nitrosification stage

Technical field

The present invention relates to confirm the method for biological nitrosification final condition.

Technical background

Along with the development of industrial and agricultural production and the raising of living standards of the people, China's itrogenous organic substance quantity discharged rapid growth, the water surrounding rapid deterioration, the problem of body eutrophication becomes increasingly conspicuous, and biological denitrificaion also becomes particularly important task.

Biological denitrificaion is a kind of comparatively economic method of removing ammonia nitrogen in the water, and its principle is exactly the circulation of nitrogen in the simulate natural ecological environment, utilizes the combined action of nitrifier and denitrifying bacteria, and ammonia nitrogen in the water is converted into nitrogen to reach the denitrogenation purpose.Denitrification process such as present widely used A/O, SBR, oxidation ditch are developed on this theoretical basis; But these denitrification process ubiquity ammonia nitrogen loadings are too high and water outlet that cause is not up to standard, consume organism; Problems such as the generation excess sludge is many, and consumes energy is many.

Short-cut nitrification and denitrification is a kind of new bio denitride technology, has advantages such as cutting down the consumption of energy, save carbon source and minimizing sludge yield.Because its economy, advantage such as effective, energy-conservation and by broad research.But the realization condition of short distance nitration technology is comparatively harsh, is difficult to keep stable short distance nitration under the normal condition especially.

Nitrite is very unstable, is oxidized to nitrate salt under the effect of nitrifier very soon, and general condition realizes that down short-cut nitrification and denitrification is the comparison difficulty.The key of short-cut nitrification and denitrification technology is to be controlled at the nitrosification stage nitrated, that is to say the control to nitrococcus and nitrifier.The method that existing realization short-cut nitrification and denitrification is in the nitrosification stage is from the microbiology angle, and screening and culturing goes out efficient nitrococcus and nitrifier, studies its biochemical character, and this method is high to the requirement of bacterium, is difficult to apply.

Summary of the invention

The present invention be to solve method that existing realization short-cut nitrification and denitrification process is in the nitrosification stage bacterium is required high, the technical problem that is difficult to apply, and a kind of method that the short-cut nitrification and denitrification process is in the nitrosification stage of controlling is provided.

Of the present inventionly a kind ofly control the method that the short-cut nitrification and denitrification process is in the nitrosification stage and carry out according to the following steps:

One, the concentration S of the temperature T of a certain moment water, pH value M, dissolved oxygen in the mensuration short-cut nitrification and denitrification process _EA, ammonia nitrogen concentration

The concentration of nitrite nitrogen

The microbial degradation of substrates speed of ammonia oxidation The microbial degradation of substrates speed of nitrosonium salts oxidation

Wherein the unit of T is ℃, I _FNAAnd I _FAUnit be mgN/L; With

Unit be mgN/ (mgVSSd); S _EAUnit be mgDO/L,

With

Unit be mgN/L;

Two, press Calculate the ratio f that free ammonia accounts for ammonium nitrogen _FA(M), press again

Calculate the ratio f that free nitrous acid accounts for nitrite nitrogen _FNA(M), pass through again

Calculate free nitrous acid concentration I respectively _FNAWith the concentration of free ammonia I _FA, its unit is mgN/L;

Three, press $Z_{\mathrm{AOB}}=b_{\mathrm{AOB}}\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})-\frac{Y_{\mathrm{AOB}}\·{\hat{q}}_{\mathrm{obs},\mathrm{AOB}}\·S_{\mathrm{EA}}}{K_{\mathrm{EA},\mathrm{AOB}}+S_{\mathrm{EA}}}$ Calculate ammonia oxidation bacteria coefficient of colligation Z _AOB, its unit is d ^-1b _AOBBe self degradation coefficient of ammonia oxidation bacteria, b _AOBGet 0.05～0.3d ^-1K _{I, FNA, AOB}Be the inhibition concentration of the free nitrous acid of ammonia oxidation bacteria, K _{I, FNA, AOB}Get 0.2-1.0mgFNA/L; Y _AOBBe the clean yield coefficient of ammonia oxidation bacteria, Y _AOBGet 0.2～0.5mgVSS/ (mgNd); K _{EA, AOB}Be the Half Speed constant of oxygen under the ammonia oxidation bacteria existence, K _{EA, AOB}Get 0.3～2.0mgDO/L;

Four, press $Z_{\mathrm{NOB}}=b_{\mathrm{NOB}}\·(1+\frac{I_{\mathrm{FA}}}{K_{I,\mathrm{FA},\mathrm{NOB}}}+\frac{f_{\mathrm{FNA}}\left(M\right)\·K_{\mathrm{ED},\mathrm{NOB}}}{K_{I,\mathrm{FNA},\mathrm{NOB}}})-\frac{Y_{\mathrm{NOB}}\·{\hat{q}}_{\mathrm{obs},\mathrm{NOB}}\·S_{\mathrm{EA}}}{K_{\mathrm{EA},\mathrm{NOB}}+S_{\mathrm{EA}}}$ Calculate NOB coefficient of colligation Z _NOB, its unit is d ^-1K _{I, FA, NOB}Be the inhibition concentration of the free ammonia of NOB, K _{I, FA, NOB}Get 0.3-1.0mgFA/L; K _{ED, NOB}Be the half constant of nitrite nitrogen, K _{ED, NOB}Get 1.0-3.0mgN/L; K _{I, FNA, NOB}Be the inhibition concentration of the free nitrous acid of NOB, K _{I, FNA, NOB}Get 0.05-0.5mgFNA/L; Y _NOBBe the clean yield coefficient of NOB, Y _NOBGet 0.05-0.2mgVSS/ (mgNd); S _EABe the concentration of dissolved oxygen, unit is mgDO/L; K _{EA, NOB}Be the Half Speed constant of oxygen under the NOB existence, K _{EA, NOB}Get 0.5～2.0mgDO/L;

Five, calculate

$S_{A,\mathrm{AOB},\min }=\frac{b_{\mathrm{AOB}}\·K_{\mathrm{EA},\mathrm{AOB}}}{Y_{\mathrm{AOB}\·}\frac{{\hat{q}}_{\mathrm{obs},\mathrm{AOB}}\·S_{\mathrm{ED}}}{[K_{\mathrm{ED},\mathrm{AOB}}(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})+S_{\mathrm{ED}}\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}}+\frac{I_{\mathrm{FA}}}{K_{I,\mathrm{FA},\mathrm{AOB}}})]}-b_{\mathrm{AOB}}}$ With

$S_{A,\mathrm{NOB},\min }=\frac{b_{\mathrm{NOB}}\·K_{\mathrm{EA},\mathrm{NOB}}}{Y_{\mathrm{AOB}}\·\frac{{\hat{q}}_{\mathrm{obs},\mathrm{AOB}}\·S_{\mathrm{ED}}}{[K_{\mathrm{ED},\mathrm{NOB}}(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{NOB}}})+S_{\mathrm{ED}}\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{NOB}}}+\frac{I_{\mathrm{FA}}}{K_{I,\mathrm{FA},\mathrm{NOB}}})]}-b_{\mathrm{NOB}}};$

Six, press $S_{D,\mathrm{AOB},\mathrm{Min}}=\frac{-Z_{\mathrm{AOB}}-\sqrt{{Z_{\mathrm{AOB}}}^2-4\·K_{\mathrm{ED},\mathrm{AOB}}\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·{b_{\mathrm{AOB}}}^2\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})}}{2\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·b_{\mathrm{AOB}}}$ With $S_{D,\mathrm{AOB},\mathrm{Max}}=\frac{-Z_{\mathrm{AOB}}+\sqrt{{Z_{\mathrm{AOB}}}^2-4\·K_{\mathrm{ED},\mathrm{AOB}}\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·{b_{\mathrm{AOB}}}^2\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})}}{2\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·b_{\mathrm{AOB}}}$ Calculate S respectively _{D, AOB, min}And S _{D, AOB, max}Value;

Seven, press $S_{D,\mathrm{NOB},\max }=\frac{{-Z}_{\mathrm{NOB}}+\sqrt{{Z_{\mathrm{NOB}}}^2-4\·K_{\mathrm{ED},\mathrm{NOB}}\·\frac{f_{\mathrm{FNA}}\left(M\right)}{K_{I,\mathrm{FNA},\mathrm{NOB}}}\·{b_{\mathrm{NOB}}}^2}}{2\·\frac{f_{\mathrm{FNA}}\left(M\right)}{K_{I,\mathrm{FNA},\mathrm{NOB}}}\·b_{\mathrm{NOB}}}$ Calculate S _{D, NOB, max}Value;

Eight, the S that step 1 is measured _EA,

With S _{A, min}, S _{D, AOB, min}, S _{D, AOB, max}And S _{D, NOB, max}Compare, if satisfy formula S simultaneously _{A, AOB, min}≤S _EA≤S _{A, NOB, min},

With

Then need not adjust the operating parameter of short-cut nitrification and denitrification process, otherwise the adjustment operating parameter turns back to step 1, until S _EA,

With

Satisfy three above-mentioned formula simultaneously, accomplish the control in nitrosification stage in the short-cut nitrification and denitrification process.

The present invention makes it satisfy the mathematical model of biological nitrosification final condition through the operating parameter of control short-cut nitrification and denitrification process.Can monitor in real time the short-cut nitrification and denitrification process, in time adjustment is handled in the nitrosification stage short-cut nitrification and denitrification process stabilization, improves the effect of water treatment, and method of the present invention can be used in the environmental protection field in the WWT.

Embodiment

Embodiment one: this embodiment a kind of controls the method that the short-cut nitrification and denitrification process is in the nitrosification stage and carries out according to the following steps:

One, the concentration S of the temperature T of a certain moment water, pH value M, dissolved oxygen in the mensuration short-cut nitrification and denitrification process _EA, ammonia nitrogen concentration

The concentration of nitrite nitrogen

The microbial degradation of substrates speed of ammonia oxidation

The microbial degradation of substrates speed of nitrosonium salts oxidation

Wherein the unit of T is ℃, I _FNAAnd I _FAUnit be mgN/L;

With

Unit be mgN/ (mgVSSd); S _EAUnit be mgDO/L,

With

Unit be mgN/L;

Two, press

Calculate the ratio f that free ammonia accounts for ammonium nitrogen _FA(M), press again

Calculate the ratio f that free nitrous acid accounts for nitrite nitrogen _FNA(M), pass through again Calculate free nitrous acid concentration I respectively _FNAWith the concentration of free ammonia I _FA, its unit is mgN/L;

Three, press $Z_{\mathrm{AOB}}=b_{\mathrm{AOB}}\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})-\frac{Y_{\mathrm{AOB}}\·{\hat{q}}_{\mathrm{obs},\mathrm{AOB}}\·S_{\mathrm{EA}}}{K_{\mathrm{EA},\mathrm{AOB}}+S_{\mathrm{EA}}}$ Calculate ammonia oxidation bacteria coefficient of colligation Z _AOB, its unit is d ^-1b _AOBBe self degradation coefficient of ammonia oxidation bacteria, b _AOBGet 0.05～0.3d ^-1K _{I, FNA, AOB}Be the inhibition concentration of the free nitrous acid of ammonia oxidation bacteria, K _{I, FNA, AOB}Get 0.2-1.0mgFNA/L; Y _AOBBe the clean yield coefficient of ammonia oxidation bacteria, Y _AOBGet 0.2～0.5mgVSS/ (mgNd); K _{EA, AOB}Be the Half Speed constant of oxygen under the ammonia oxidation bacteria existence, K _{EA, AOB}Get 0.3～2.0mgDO/L;

Four, press $Z_{\mathrm{NOB}}=b_{\mathrm{NOB}}\·(1+\frac{I_{\mathrm{FA}}}{K_{I,\mathrm{FA},\mathrm{NOB}}}+\frac{f_{\mathrm{FNA}}\left(M\right)\·K_{\mathrm{ED},\mathrm{NOB}}}{K_{I,\mathrm{FNA},\mathrm{NOB}}})-\frac{Y_{\mathrm{NOB}}\·{\hat{q}}_{\mathrm{obs},\mathrm{NOB}}\·S_{\mathrm{EA}}}{K_{\mathrm{EA},\mathrm{NOB}}+S_{\mathrm{EA}}}$ Calculate NOB coefficient of colligation Z _NOB, its unit is d ^-1K _{I, FA, NOB}Be the inhibition concentration of the free ammonia of NOB, K _{I, FA, NOB}Get 0.3-1.0mgFA/L; K _{ED, NOB}Be the half constant of nitrite nitrogen, K _{ED, NOB}Get 1.0-3.0mgN/L; K _{I, FNA, NOB}Be the inhibition concentration of the free nitrous acid of NOB, K _{I, FNA, NOB}Get 0.05-0.5mgFNA/L; Y _NOBBe the clean yield coefficient of NOB, Y _NOBGet 0.05-0.2mgVSS/ (mgNd); S _EABe the concentration of dissolved oxygen, unit is mgDO/L; K _{EA, NOB}Be the Half Speed constant of oxygen under the NOB existence, K _{EA, NOB}Get 0.5～2.0mgDO/L;

Five, calculate

$S_{A,\mathrm{AOB},\mathrm{Min}}=\frac{b_{\mathrm{AOB}}\·K_{\mathrm{EA},\mathrm{AOB}}}{Y_{\mathrm{AOB}\·}\frac{{\hat{q}}_{\mathrm{Obs},\mathrm{AOB}}\·S_{\mathrm{ED}}}{[K_{\mathrm{ED},\mathrm{AOB}}(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})+S_{\mathrm{ED}}\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}}+\frac{I_{\mathrm{FA}}}{K_{I,\mathrm{FA},\mathrm{AOB}}})]}-b_{\mathrm{AOB}}}$ With $S_{A,\mathrm{NOB},\mathrm{Min}}=\frac{b_{\mathrm{NOB}}\·K_{\mathrm{EA},\mathrm{NOB}}}{Y_{\mathrm{AOB}}\·\frac{{\hat{q}}_{\mathrm{Obs},\mathrm{AOB}}\·S_{\mathrm{ED}}}{[K_{\mathrm{ED},\mathrm{NOB}}(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{NOB}}})+S_{\mathrm{ED}}\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{NOB}}}+\frac{I_{\mathrm{FA}}}{K_{I,\mathrm{FA},\mathrm{NOB}}})]}-b_{\mathrm{NOB}}};$

Six, press $S_{D,\mathrm{AOB},\mathrm{Min}}=\frac{-Z_{\mathrm{AOB}}-\sqrt{{Z_{\mathrm{AOB}}}^2-4\·K_{\mathrm{ED},\mathrm{AOB}}\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·{b_{\mathrm{AOB}}}^2\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})}}{2\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·b_{\mathrm{AOB}}}$ With $S_{D,\mathrm{AOB},\mathrm{Max}}=\frac{-Z_{\mathrm{AOB}}+\sqrt{{Z_{\mathrm{AOB}}}^2-4\·K_{\mathrm{ED},\mathrm{AOB}}\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·{b_{\mathrm{AOB}}}^2\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})}}{2\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·b_{\mathrm{AOB}}}$ Calculate S respectively _{D, AOB, min}And S _{D, AOB, max}Value;

Seven, press $S_{D,\mathrm{NOB},\max }=\frac{{-Z}_{\mathrm{NOB}}+\sqrt{{Z_{\mathrm{NOB}}}^2-4\·K_{\mathrm{ED},\mathrm{NOB}}\·\frac{f_{\mathrm{FNA}}\left(M\right)}{K_{I,\mathrm{FNA},\mathrm{NOB}}}\·{b_{\mathrm{NOB}}}^2}}{2\·\frac{f_{\mathrm{FNA}}\left(M\right)}{K_{I,\mathrm{FNA},\mathrm{NOB}}}\·b_{\mathrm{NOB}}}$ Calculate S respectively _{D, NOB, min}And S _{D, NOB, max}Value;

Eight, the S that step 1 is measured _EA,

With S _{A, min}, S _{D, AOB, min}And S _{D, AOB, max}, S _{D, NOB, min}And S _{D, NOB, max}Compare, if satisfy formula S simultaneously _{A, AOB, min}≤S _EA≤S _{A, NOB, min},

With

Then need not adjust the operating parameter of short-cut nitrification and denitrification process, otherwise the adjustment operating parameter turns back to step 1, until S _EA,

With

Satisfy three above-mentioned formula simultaneously, accomplish the control in nitrosification stage in the short-cut nitrification and denitrification process.

This embodiment makes it satisfy the mathematical model of biological nitrosification final condition through the operating parameter of control short-cut nitrification and denitrification process.Can monitor in real time the short-cut nitrification and denitrification process, in time adjustment is handled in the nitrosification stage short-cut nitrification and denitrification process stabilization, improves the effect of water treatment, and method of the present invention can be used in the environmental protection field in the WWT.

Embodiment two: this embodiment and embodiment one are different is that the operating parameter of adjustment short-cut nitrification and denitrification process in the step 8 is: the concentration S that regulates dissolved oxygen through the adjustment aeration _EAOther is identical with embodiment one.

DETAILED DESCRIPTION Three: The present embodiment embodiment one or two difference is adjusted in eight steps nitrification and denitrification processes operating parameters are: ammonia nitrogen by adding ammonium sulfate to increase the concentration of

Other embodiments one or two identical .

DETAILED DESCRIPTION four: the embodiment of one to three with one embodiment difference is adjusted in eight steps of nitrification and denitrification processes operating parameters are: to improve through sodium nitrite nitrite concentrations

Other embodiments one to three of the same.

With following verification experimental verification beneficial effect of the present invention:

Test one: this test one a kind of controls the method that the short-cut nitrification and denitrification process is in the nitrosification stage and carries out according to the following steps:

One, each parameter value such as following table:

Physical quantity	Unit	AOB	NOB
				Y	mgVSS/(mgN·d)	0.33	0.083
K ED，i	mgN/L	1.5	2.1
				KEA	mgDO/L	0.5	0.68
b i	d -1	0.15	0.15
				K I，FA，i	mgFA/L	10	0.75
K I，FNA，i	mgFNA/L	0.5	0.1

Measure temperature T=35 ℃, the pH value M=8.5 of water in the short-cut nitrification and denitrification process, the concentration S of dissolved oxygen _EAThe concentration of=0.5mgDO/L, ammonia nitrogen

The concentration of nitrite nitrogen

The microbial degradation of substrates speed of ammonia oxidation

The microbial degradation of substrates speed of nitrosonium salts oxidation ${\hat{q}}_{\mathrm{obs},\mathrm{NOB}}=13\mathrm{mg}/N(\mathrm{mgVSS}\·d);$

Two, press Calculate the ratio f that free ammonia accounts for ammonium nitrogen _FA(M)=0.328, press again

Calculate the ratio f that free nitrous acid accounts for nitrite nitrogen _FA(M)=1.86 * 10 ^-5So, the concentration of free ammonia $I_{\mathrm{FA}}=f_{\mathrm{FA}}\left(M\right)S_{{{\mathrm{NH}}_4}^{+}-N}=0.328\×1000=328\mathrm{Mg}/L,$ Free nitrous acid concentration $I_{\mathrm{FNA}}=f_{\mathrm{FNA}}\left(M\right)\·S_{{{\mathrm{NO}}_2}^{-}-N}=1.86\×{10}^{-5}\×500=0;$

Three, press $Z_{\mathrm{AOB}}=b_{\mathrm{AOB}}\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})-\frac{Y_{\mathrm{AOB}}\·{\hat{q}}_{\mathrm{obs},\mathrm{AOB}}\·S_{\mathrm{EA}}}{K_{\mathrm{EA},\mathrm{AOB}}+S_{\mathrm{EA}}}$ Calculate ammonia oxidation bacteria coefficient of colligation Z _AOB=-0.362d ^-1Self degradation coefficient b of ammonia oxidation bacteria _AOBGet 0.15d ^-1The inhibition concentration K of the free nitrous acid of ammonia oxidation bacteria _{I, FNA, AOB}Get 0.5mgFNA/L; The clean yield coefficient Y of ammonia oxidation bacteria _AOBGet 0.33mgVSS/ (mgNd); The Half Speed constant K of oxygen under the ammonia oxidation bacteria existence _{EA, AOB}Get 0.5mgDO/L;

Four, press $Z_{\mathrm{NOB}}=b_{\mathrm{NOB}}\·(1+\frac{I_{\mathrm{FA}}}{K_{I,\mathrm{FA},\mathrm{NOB}}}+\frac{f_{\mathrm{FNA}}\left(M\right)\·K_{\mathrm{ED},\mathrm{NOB}}}{K_{I,\mathrm{FNA},\mathrm{NOB}}})-\frac{Y_{\mathrm{NOB}}\·{\hat{q}}_{\mathrm{obs},\mathrm{NOB}}\·S_{\mathrm{EA}}}{K_{\mathrm{EA},\mathrm{NOB}}+S_{\mathrm{EA}}}$ Calculate NOB coefficient of colligation Z _NOB=65.29d ^-1Self degradation coefficient b of NOB _AOBGet 0.15d ^-1The inhibition concentration K of the free ammonia of NOB _{I, FA, NOB}Get 0.75mgFA/L; The half constant K of nitrite nitrogen _{ED, NOB}Get 2.1mgN/L; The inhibition concentration K of the free nitrous acid of NOB _{I, FNA, NOB}Get 0.1mgFNA/L; The clean yield coefficient Y of NOB _NOBGet 0.083mgVSS/ (mgNd); S _EABe the concentration of dissolved oxygen, unit is mgDO/L; The Half Speed constant of oxygen under the NOB existence, K _{EA, NOB}Get 0.68mgDO/L;

Five, press

$S_{A,\mathrm{AOB},\mathrm{Min}}=\frac{b_{\mathrm{AOB}}\·K_{\mathrm{EA},\mathrm{AOB}}}{Y_{\mathrm{AOB}\·}\frac{{\hat{q}}_{\mathrm{Obs},\mathrm{AOB}}\·S_{\mathrm{ED}}}{[K_{\mathrm{ED},\mathrm{AOB}}(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})+S_{\mathrm{ED}}\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}}+\frac{I_{\mathrm{FA}}}{K_{I,\mathrm{FA},\mathrm{AOB}}})]}-b_{\mathrm{AOB}}}$ With $S_{A,\mathrm{NOB},\mathrm{Min}}=\frac{b_{\mathrm{NOB}}\·K_{\mathrm{EA},\mathrm{NOB}}}{Y_{\mathrm{AOB}}\·\frac{{\hat{q}}_{\mathrm{Obs},\mathrm{AOB}}\·S_{\mathrm{ED}}}{[K_{\mathrm{ED},\mathrm{NOB}}(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{NOB}}})+S_{\mathrm{ED}}\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{NOB}}}+\frac{I_{\mathrm{FA}}}{K_{I,\mathrm{FA},\mathrm{NOB}}})]}-b_{\mathrm{NOB}}}$

Calculate _{SA, AOB, min}=-0.626mgDO/L and S _{A, NOB, min}=3.637mgDO/L;

Six, press $S_{D,\mathrm{AOB},\mathrm{Min}}=\frac{-Z_{\mathrm{AOB}}-\sqrt{{Z_{\mathrm{AOB}}}^2-4\·K_{\mathrm{ED},\mathrm{AOB}}\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·{b_{\mathrm{AOB}}}^2\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})}}{2\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·b_{\mathrm{AOB}}}$ With $S_{D,\mathrm{AOB},\mathrm{Max}}=\frac{-Z_{\mathrm{AOB}}+\sqrt{{Z_{\mathrm{AOB}}}^2-4\·K_{\mathrm{ED},\mathrm{AOB}}\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·{b_{\mathrm{AOB}}}^2\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})}}{2\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·b_{\mathrm{AOB}}}$ Calculate S respectively _{D, AOB, min}=0.627mgN/L and S _{D, AOB, max}=62.55mgN/L;

Seven, press

$S_{D,\mathrm{NOB},\max }=\frac{{-Z}_{\mathrm{NOB}}+\sqrt{{Z_{\mathrm{NOB}}}^2-4\·K_{\mathrm{ED},\mathrm{NOB}}\·\frac{f_{\mathrm{FNA}}\left(M\right)}{K_{I,\mathrm{FNA},\mathrm{NOB}}}\·{b_{\mathrm{NOB}}}^2}}{2\·\frac{f_{\mathrm{FNA}}\left(M\right)}{K_{I,\mathrm{FNA},\mathrm{NOB}}}\·b_{\mathrm{NOB}}}$ Calculate S _{D, NOB, min}=100.17mgN/L and S _{D, NOB, max}=713.56mgN/L;

Eight, the S that step 1 is measured _EA, With S _{A, min}, S _{D, AOB, min}And S _{D, AOB, max}S _{D, NOB, min}And S _{D, NOB, max}Compare, it can not satisfy S simultaneously _{A, AOB, min}≤S _EA≤S _{A, NOB, min},

Then need not adjust the operating parameter of short-cut nitrification and denitrification process, otherwise the adjustment operating parameter turns back to step 1, until S _EA, With

Satisfy three above-mentioned formula simultaneously, accomplish the control in nitrosification stage in the short-cut nitrification and denitrification process.

In the step 7, can also pass through in this test

$S_{D,\mathrm{NOB},\min }=\frac{-Z_{\mathrm{NOB}}-\sqrt{{Z_{\mathrm{NOB}}}^2-4\·K_{\mathrm{ED},\mathrm{NOB}}\·\frac{f_{\mathrm{FNA}}\left(M\right)}{K_{I,\mathrm{FNA},\mathrm{NOB}}}\·{b_{\mathrm{NOB}}}^2}}{2\·\frac{f_{\mathrm{FNA}}\left(M\right)}{K_{I,\mathrm{FNA},\mathrm{NOB}}}\·b_{\mathrm{NOB}}}$ Calculated value judge whether NOB exists, if the concentration of nitrite nitrogen

Explain that then there is S in this test one in NOB _{D, NOB, min}=100.17mgN/L, and the concentration of nitrite nitrogen is 500mgN/L, explains that NOB exists.This test makes it satisfy the mathematical model of biological nitrosification final condition through the operating parameter of control short-cut nitrification and denitrification process.Can monitor in real time the short-cut nitrification and denitrification process, in time adjustment is handled in the nitrosification stage short-cut nitrification and denitrification process stabilization, improves the effect of water treatment.

Claims (4)

1. control the method that the short-cut nitrification and denitrification process is in the nitrosification stage for one kind, it is characterized in that controlling the method that the short-cut nitrification and denitrification process is in the nitrosification stage and carry out according to the following steps:

One, the concentration S of the temperature T of a certain moment water, pH value M, dissolved oxygen in the mensuration short-cut nitrification and denitrification process _EA, ammonia nitrogen concentration

The concentration of nitrite nitrogen

The microbial degradation of substrates speed of ammonia oxidation

The microbial degradation of substrates speed of nitrosonium salts oxidation

Wherein the unit of T is ℃, I _FNAAnd I _FAUnit be mgN/L;

With Unit be mgN/ (mgVSSd); S _EAUnit be mgDO/L,

With

Unit be mgN/L;

Two, press

Calculate the ratio f that free ammonia accounts for ammonium nitrogen _FA(M), press again Calculate the ratio f that free nitrous acid accounts for nitrite nitrogen _FNA(M), pass through again

Calculate free nitrous acid concentration I respectively _FNAWith the concentration of free ammonia I _FA, its unit is mgN/L;

Three, press $Z_{\mathrm{AOB}}=b_{\mathrm{AOB}}\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})-\frac{Y_{\mathrm{AOB}}\·{\hat{q}}_{\mathrm{obs},\mathrm{AOB}}\·S_{\mathrm{EA}}}{K_{\mathrm{EA},\mathrm{AOB}}+S_{\mathrm{EA}}}$ Calculate ammonia oxidation bacteria coefficient of colligation Z _AOB, its unit is d ^-1b _AOBBe self degradation coefficient of ammonia oxidation bacteria, b _AOBGet 0.05～0.3d ^-1K _{I, FNA, AOB}Be the inhibition concentration of the free nitrous acid of ammonia oxidation bacteria, K _{I, FNA, AOB}Get 0.2-1.0mgFNA/L; Y _AOBBe the clean yield coefficient of ammonia oxidation bacteria, Y _AOBGet 0.2～0.5mgVSS/ (mgNd); K _{EA, AOB}Be the Half Speed constant of oxygen under the ammonia oxidation bacteria existence, K _{EA, AOB}Get 0.3～2.0mgDO/L;

Four, press $Z_{\mathrm{NOB}}=b_{\mathrm{NOB}}\·(1+\frac{I_{\mathrm{FA}}}{K_{I,\mathrm{FA},\mathrm{NOB}}}+\frac{f_{\mathrm{FNA}}\left(M\right)\·K_{\mathrm{ED},\mathrm{NOB}}}{K_{I,\mathrm{FNA},\mathrm{NOB}}})-\frac{Y_{\mathrm{NOB}}\·{\hat{q}}_{\mathrm{obs},\mathrm{NOB}}\·S_{\mathrm{EA}}}{K_{\mathrm{EA},\mathrm{NOB}}+S_{\mathrm{EA}}}$ Calculate NOB coefficient of colligation Z _NOB, its unit is d ^-1K _{I, FA, NOB}Be the inhibition concentration of the free ammonia of NOB, K _{I, FA, NOB}Get 0.3-1.0mgFA/L; K _{ED, NOB}Be the half constant of nitrite nitrogen, K _{ED, NOB}Get 1.0-3.0mgN/L; K _{I, FNA, NOB}Be the inhibition concentration of the free nitrous acid of NOB, K _{I, FNA, NOB}Get 0.05-0.5mgFNA/L; Y _NOBBe the clean yield coefficient of NOB, Y _NOBGet 0.05-0.2mgVSS/ (mgNd); S _EABe the concentration of dissolved oxygen, unit is mgDO/L; K _{EA, NOB}Be the Half Speed constant of oxygen under the NOB existence, K _{EA, NOB}Get 0.5～2.0mgDO/L;

Five, calculate

$S_{A,\mathrm{AOB},\mathrm{Min}}=\frac{b_{\mathrm{AOB}}\·K_{\mathrm{EA},\mathrm{AOB}}}{Y_{\mathrm{AOB}\·}\frac{{\hat{q}}_{\mathrm{Obs},\mathrm{AOB}}\·S_{\mathrm{ED}}}{[K_{\mathrm{ED},\mathrm{AOB}}(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})+S_{\mathrm{ED}}\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}}+\frac{I_{\mathrm{FA}}}{K_{I,\mathrm{FA},\mathrm{AOB}}})]}-b_{\mathrm{AOB}}}$ With $S_{A,\mathrm{NOB},\mathrm{Min}}=\frac{b_{\mathrm{NOB}}\·K_{\mathrm{EA},\mathrm{NOB}}}{Y_{\mathrm{AOB}}\·\frac{{\hat{q}}_{\mathrm{Obs},\mathrm{AOB}}\·S_{\mathrm{ED}}}{[K_{\mathrm{ED},\mathrm{NOB}}(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{NOB}}})+S_{\mathrm{ED}}\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{NOB}}}+\frac{I_{\mathrm{FA}}}{K_{I,\mathrm{FA},\mathrm{NOB}}})]}-b_{\mathrm{NOB}}};$

Six, press $S_{D,\mathrm{AOB},\mathrm{Min}}=\frac{-Z_{\mathrm{AOB}}-\sqrt{{Z_{\mathrm{AOB}}}^2-4\·K_{\mathrm{ED},\mathrm{AOB}}\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·{b_{\mathrm{AOB}}}^2\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})}}{2\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·b_{\mathrm{AOB}}}$ With $S_{D,\mathrm{AOB},\mathrm{Max}}=\frac{-Z_{\mathrm{AOB}}+\sqrt{{Z_{\mathrm{AOB}}}^2-4\·K_{\mathrm{ED},\mathrm{AOB}}\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·{b_{\mathrm{AOB}}}^2\·(1+\frac{I_{\mathrm{FNA}}}{K_{I,\mathrm{FNA},\mathrm{AOB}}})}}{2\·\frac{f_{\mathrm{FA}}\left(M\right)}{K_{I,\mathrm{FA},\mathrm{AOB}}}\·b_{\mathrm{AOB}}}$ Calculate S respectively _{D, AOB, min}And S _{D, AOB, max}Value;

Seven, press

$S_{D,\mathrm{NOB},\mathrm{Min}}=\frac{{-Z}_{\mathrm{NOB}}-\sqrt{{Z_{\mathrm{NOB}}}^2-4\·K_{\mathrm{ED},\mathrm{NOB}}\·\frac{f_{\mathrm{FNA}}\left(M\right)}{K_{I,\mathrm{FNA},\mathrm{NOB}}}\·{b_{\mathrm{NOB}}}^2}}{2\·\frac{f_{\mathrm{FNA}}\left(M\right)}{K_{I,\mathrm{FNA},\mathrm{NOB}}}\·b_{\mathrm{NOB}}}$ With $S_{D,\mathrm{NOB},\mathrm{Max}}=\frac{{-Z}_{\mathrm{NOB}}+\sqrt{{Z_{\mathrm{NOB}}}^2-4\·K_{\mathrm{ED},\mathrm{NOB}}\·\frac{f_{\mathrm{FNA}}\left(M\right)}{K_{I,\mathrm{FNA},\mathrm{NOB}}}\·{b_{\mathrm{NOB}}}^2}}{2\·\frac{f_{\mathrm{FNA}}\left(M\right)}{K_{I,\mathrm{FNA},\mathrm{NOB}}}\·b_{\mathrm{NOB}}}$ Calculate S respectively _{D, NOB, min}And S _{D, NOB, max}Value;

Eight, the S that step 1 is measured _EA,

With S _{A, min}, S _{D, AOB, min}And S _{D, AOB, max}S _{D, NOB, min}And S _{D, NOB, max}Compare, if satisfy formula S simultaneously _{A, AOB, min}≤S _EA≤S _{A, NOB, min},

With

Then need not adjust the operating parameter of short-cut nitrification and denitrification process, otherwise the adjustment operating parameter turns back to step 1, until S _EA,

With

Satisfy three above-mentioned formula simultaneously, accomplish the control in nitrosification stage in the short-cut nitrification and denitrification process.

2. a kind of method that the short-cut nitrification and denitrification process is in the nitrosification stage of controlling according to claim 1 is characterized in that regulating the concentration S of dissolved oxygen through adjusting aeration in the step 8 _EA

3. a kind of method that the short-cut nitrification and denitrification process is in the nitrosification stage of controlling according to claim 1 is characterized in that in the step 8 improving the concentration

of ammonia nitrogen through adding ammonium sulfate

4. a kind of method that the short-cut nitrification and denitrification process is in the nitrosification stage of controlling according to claim 1 is characterized in that in the step 8 improving the concentration

of nitrite nitrogen through adding Sodium Nitrite