CN106045046B - A method of activated sludge dephosphorizing efficiency is assessed based on breathing map - Google Patents
A method of activated sludge dephosphorizing efficiency is assessed based on breathing map Download PDFInfo
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Abstract
The invention discloses a kind of methods based on breathing map assessment activated sludge dephosphorizing efficiency, comprising: 1) carries out breathing atlas analysis to sludge sewage, obtain breathing map DO-t curve；2) corresponding breathing map OUR-t curve is converted by breathing map DO-t curve；3) two change points B and C are obtained according to OUR variation characteristic on breathing map OUR-t curve, this two o'clock respectively corresponding points B ˊ and C ˊ is found respectively on breathing map DO-t curve simultaneously, DO-t curve with point B ˊ, C ˊ line, is divided into region I and region II respectively by DO-t curve starting point A；4) according to I area ratio of region II/region, activated sludge dephosphorizing efficiency is assessed, I area ratio of region II/region is bigger, and activated sludge dephosphorizing efficiency is higher.The present invention breathes atlas analysis according to activated sludge, effectively assesses the dephosphorization efficiency of activated sludge.
Description
Technical field
The invention belongs to sewage treatment fields, are related to a kind of analysis by breathing map to activated sludge, assessment activity
The method of sludge dephosphorization efficiency.
Background technique
Water eutrophication results in water quality deterioration, has seriously affected people's production and life, and nitrogen, phosphorus are all that water body is raw
The important nutrient of object, but the aquatiles such as algae are more sensitive to phosphorus, how to solve the problems, such as water eutrophication, it is important to
Remove phosphor in sewage.
Currently, generalling use the removal of chemistry and biological method realization phosphor in sewage.Chemical dephosphorization is one used earliest
Kind phosphorus removing method, the basic principle is that being generated not by adding chemical agent (aluminium salt, calcium salt and molysite etc.) with phosphorus reaction in water
Soluble phosphoric acid salt sediment, then by being separated by solid-liquid separation the phosphorus removed in water.The method is easy to operate, and dephosphorization efficiency is high.But by
In adding for chemical agent, processing cost is significantly increased, and generates a large amount of sludge, it is difficult to subsequent processing；Biological phosphate-eliminating, i.e.,
Activated sludge dephosphorizing is mainly completed by the microorganism for being referred to as polyP bacteria a kind of in activated sludge, and dephosphorization mechanism is as follows:
Under anaerobic condition, it is extracellular to be hydrolyzed to phosphate release by polyP bacteria for poly- phosphorus intracellular in activated sludge, and therefrom obtains energy, together
When organic synthesis material for thermal energy storage PHB degradable in sewage is stored in it is intracellular；Then under aerobic condition, in activated sludge
PolyP bacteria oxygenolysis PHB, and the energy generated using the reaction, excess absorb phosphate from sewage, are store in the form of poly- phosphorus
It is stored in intracellular.Usual aerobic phosphorus accumulation amount is greater than anaerobic phosphorus release amount, therefore can realize the purpose of dephosphorization by discharging excess sludge.Biology
Dephosphorization method has many advantages, such as that sustainability, operating cost are low, does not cause secondary pollution, and current overwhelming majority of countries is caused to select
The purpose of adopting said method realization efficient dephosphorization.Therefore, how accurate evaluation activated sludge dephosphorizing efficiency seems most important.
Assessment activated sludge dephosphorizing efficiency generally uses the methods of the rate of anaerobic phosphate release, PHB content of anaerobism storage.
The present invention establishes a kind of more simple and easy activated sludge dephosphorizing efficiency evaluation method by breathing atlas analysis.
Summary of the invention
The purpose of the present invention is to provide a kind of method based on breathing map assessment activated sludge dephosphorizing efficiency, this method
Map DO-t curve is breathed using activated sludge is obtained under the conditions of aerobic, I area ratio of region II/region is obtained, thus accurately
Assess activated sludge dephosphorizing efficiency.
As a kind of method for assessing activated sludge dephosphorizing efficiency, sewage plant activated sludge test result shows: Wo Menfa
The bright method based on breathing map assessment activated sludge dephosphorizing efficiency can accurately and efficiently assess activated sludge dephosphorizing effect
Rate.
The purpose of the present invention is what is realized by following technical proposals.
A kind of method based on breathing map assessment activated sludge dephosphorizing efficiency provided according to embodiments of the present invention, including
Following step:
1) sludge sewage is taken, activated sludge is cleaned multiple times with buffer solution, and is sufficiently aerated
Activated sludge is set to enter endogenous respiration state；
2) the aeration quantity parameter k of aerator is selectedLA, in the activated sludge that step 1) enters endogenous respiration state, according to
According to selected aeration quantity parameter kLA controls organic matter additive amount S, and according to the practical dephosphorization characteristics of activated sludge, adjustment aeration
Parameter is measured, breathing map DO-t curve is obtained；
3) the saturation oxygen dissolving value C* under activated sludge existence condition is selected, is exposed in combination with the aerator that step 2) is selected
Tolerance parameter kLA converts breathing map OUR-t curve for the breathing map DO-t curve that step 2) obtains according to formula；
4) on the breathing map OUR-t curve that step 3) obtains, respiratory rate OUR catastrophe point B and respiratory rate are determined
OUR change terminating point C, then found on corresponding breathing map DO-t curve respiratory rate OUR catastrophe point B corresponding points B ˊ with
Respiratory rate OUR changes terminating point C corresponding points C ˊ；Connection breathing map DO-t curve starting point A and point C ˊ, to breathe map
A, B ˊ two o'clock line are line of demarcation on DO-t curve, and breathing map DO-t curve is divided into two regions, line AB ˊ and spirogram
It composes DO-t curve and constitutes region I；Line AB ˊ, line AC ˊ and breathing map DO-t curve constitute region II；
5) according to I area ratio of region II/region, activated sludge dephosphorizing efficiency, I area ratio of region II/region are assessed
Bigger, activated sludge dephosphorizing efficiency is higher.
Further, in the step 1), activated sludge enters the detailed process of endogenous respiration state are as follows:
Sludge sewage is taken, and is diluted with the ratio of volume ratio 1:3 addition tap water, by activated sludge sample
By stirring, 1/2 volume for precipitating, removing supernatant, being settled to activated sludge dilution, washed mud 3 times with PBS buffer solution, it
Active sludge intermixture is settled to the original volume of activated sludge dilution by addition tap water afterwards, is aerated 2h, and activated sludge enters
Endogenous respiration state.
Further, the breathing map DO-t curve meets the following conditions:
DO duration decline stage t1: 5≤t1≤25min；
Fall △ DO:0.2≤△ DO≤6.0mg/L of DO decline stage；
DO-t curve total duration t3, 120≤t3≤600min。
Further, in the step 2), the following condition controls of breathing map DO-t curve negotiating are obtained:
Organic matter additive amount S and activated sludge diluent concentration MLSS 2a) is adjusted, duration DO decline stage is controlled
t1: 5≤t1≤ 25min and DO fall △ DO:0.2≤△ DO≤6.0mg/L；
Wherein, △ DO refers to the DO difference of DO and DO decline stage the end point D of breathing map DO-t curve starting point A；
As DO duration decline stage t1When < 5min or DO fall △ DO < 0.2mg/L, then increase organic
Object additive amount S or activated sludge diluent concentration MLSS；
As DO duration decline stage t1When > 25min or DO fall △ DO > 6.0mg/L, then reduce organic
The amount S or activated sludge diluent concentration MLSS of object；
By constantly adjusting organic matter additive amount S and activated sludge diluent concentration MLSS, when continuing the DO decline stage
Between t1: 5≤t1≤ 25min and DO fall △ DO:0.2≤△ DO≤6.0mg/L；
2b) keep above-mentioned steps 2a) obtained in organic matter additive amount S and activated sludge diluent concentration MLSS it is constant,
By adjusting aerator aeration quantity parameter kLA controls DO-t curve total duration t3: 120≤t3≤600min；
Wherein, t3Change the time point to go to zero for the slope of curve；
Holding meets DO duration decline stage t1With the organic matter additive amount S and activity of DO fall △ DO condition
Sludge diluent concentration MLSS is constant, as curve total duration t3When < 120min, then reduce aerator aeration quantity parameter
kLa；As curve total duration t3When > 600min, then increase aerator aeration quantity parameter kLa；By constantly adjusting kLA,
Make curve total duration t3: 120≤t3≤600min；
If 2c) above-mentioned steps 2b) in by constantly adjust kLA, in aerator aeration quantity parameter kLNothing in a controlled range
Method realizes curve total duration t3: 120≤t3≤ 600min then adjusts organic matter additive amount S, is not changing the DO decline stage
Duration t1: 5≤t1Under the premise of≤25min and DO fall △ DO:0.2≤△ DO≤6.0mg/L, realize that curve is always held
Continuous time t3: 120≤t3≤600min；
2d) in above-mentioned steps 2a), 2b) and 2c) in comprehensive determining organic matter amount S and aerator aeration quantity parameter
kLUnder the conditions of a, obtained DO-t curve, as breathing map DO-t curve, while breathing map DO-t curve can be obtained and risen
Stage inflection point time of occurrence t2: 30≤t2≤300min。
Further, the adjustment activated sludge diluent concentration MLSS adjustable range is 250~5000mg/L.
Further, the organic matter is single carbon source: sodium acetate, glucose, or is mixed carbon source: sanitary sewage.
Step 2) is according to selected aerator aeration quantity parameter kLA controls organic matter additive amount S, and control method is as follows:
2a ˊ) if organic matter is single carbon source sodium acetate, corresponding relationship numerically is S=(0.23~136) kLa；
2b ˊ) if organic matter is single carbon source glucose, corresponding relationship numerically is S=(0.38~231) kLa；
2c ˊ) if organic matter is mixed carbon source sanitary sewage, corresponding relationship numerically is S=(1.25~750) kLa；
Additive amount S unit mg/L, kLA unit h-1。
Further, the temperature control that step 2) obtains breathing map DO-t curve procedures is 8~40 DEG C.
Further, in step 3), corresponding breathing map OUR-t curve is converted by breathing map DO-t curve, is passed through
Following formula convert to obtain:
Wherein,Derivative for the practical oxygen dissolving value on breathing map DO-t curve to the time, kLA is aerator exposure
Tolerance parameter, C* are that oxygen dissolving value is saturated under sludge existence condition, and C is practical oxygen dissolving value, and OUR is respiratory rate OUR.
Further, in step 1), the buffer solution of the cleaning sludge is PBS buffer solution, which is following
Component mixed liquor:
A:KH2PO4Concentration is 1.5~2.5mmolL-1；
B:Na2HPO4Concentration is 8~12mmolL-1；
C:NaCl concentration is 135~140mmolL-1；
D:KCl concentration is 2.5~3.0mmolL-1。
Further, in step 5), the breathing map DO-t curve starting point A is addition organic matter synchronization point；Institute
State breathing map OUR-t curve on respiratory rate OUR catastrophe point B be respiratory rate OUR it is very fast be varied down to tend to be steady during
Turning point, breathing map DO-t curve on corresponding points B ˊ be B point synchronization breathe map DO-t curve on pair
Ying Dian；Respiratory rate OUR variation terminating point C varies less on the breathing map OUR-t curve for respiratory rate OUR tends to
Turning point in constant process, the corresponding points C ˊ on breathing map DO-t curve are that C point synchronization breathes map DO-t
Corresponding points on curve.
The invention has the following advantages that
1) present invention finds breathing map region II/between I area ratio of region and practical dephosphorization efficiency relationship, Ke Yizhun
Really, activated sludge dephosphorizing efficiency is efficiently assessed, and then to solve the problems, such as that water eutrophication provides effective determination method, is had
There is certain directive significance.
2) the method for the present invention is easy to detect.Step is simple and easy, and test equipment automates, such as uses the green mark water in Xi'an
The WBM series sewage treatment wisdom that environmental science and technology Co., Ltd provides runs work station, can be in the case where unattended certainly
Dynamicization tests sludge to be tested.
Detailed description of the invention
Fig. 1 is that sewage plant D breathes map DO-t curve and corresponding breathing map OUR-t curve.
Fig. 2 is that I area ratio of region II/region is closed between the practical dephosphorization efficiency of sewage plant on breathing map DO-t curve
System.
Specific embodiment
Below by accompanying drawings and embodiments, the present invention is described further.
The present invention assesses activated sludge dephosphorizing efficiency by breathing atlas analysis to activated sludge.
The present invention assesses activated sludge dephosphorizing efficiency, comprising the following steps:
1) sludge sewage is taken, activated sludge is cleaned multiple times with buffer solution, and is sufficiently aerated
Activated sludge is set to enter endogenous respiration state；
Buffer solution is following components mixed liquor:
A:KH2PO4 concentration is 1.5~2.5mmolL-1；
B:Na2HPO4 concentration is 8~12mmolL-1；
C:NaCl concentration is 135~140mmolL-1；
D:KCl concentration is 2.5~3.0mmolL-1。
2) the aeration quantity parameter k of aerator is selectedLA, in the sludge that step 1) enters endogenous respiration state, according to choosing
Fixed parameter kLA controls the additive amount S of organic matter (single carbon source: sodium acetate, glucose or mixed carbon source: sanitary sewage),
And according to the practical dephosphorization characteristics of sludge, aeration quantity parameter is adjusted, obtains breathing map DO-t curve；Obtain DO-t curve procedures
Controlled at 8~40 DEG C；
Breathing map DO-t curve meets the following conditions:
DO duration decline stage t1: 5≤t1≤25min；
Fall △ DO:0.2≤△ DO≤6.0mg/L of DO decline stage；
DO-t curve total duration t3, 120≤t3≤600min。
Also, it breathes the following condition controls of map DO-t curve negotiating to obtain:
Organic matter additive amount S and activated sludge diluent concentration MLSS 2a) is adjusted, activated sludge diluent concentration is adjusted
MLSS adjustable range is 250~5000mg/L；Control DO decline stage duration t1: 5≤t1≤ 25min and DO fall
△ DO:0.2≤△ DO≤6.0mg/L；Wherein, △ DO refers to that DO and the DO decline stage of breathing map DO-t curve starting point A ties
The DO difference of beam spot D；
As DO duration decline stage t1When < 5min or DO fall △ DO < 0.2mg/L, then increase organic
Object additive amount S or activated sludge diluent concentration MLSS；
As DO duration decline stage t1When > 25min or DO fall △ DO > 6.0mg/L, then reduce organic
The amount S or activated sludge diluent concentration MLSS of object；
By constantly adjusting organic matter additive amount S and activated sludge diluent concentration MLSS, when continuing the DO decline stage
Between t1: 5≤t1≤ 25min and DO fall △ DO:0.2≤△ DO≤6.0mg/L；
2b) keep above-mentioned steps 2a) obtained in organic matter additive amount S and activated sludge diluent concentration MLSS it is constant,
By adjusting aerator aeration quantity parameter kLA, controlling curve total duration t3: 120≤t3≤600min；Wherein, t3For song
Line slope changes the time point to go to zero；
Holding meets DO duration decline stage t1With the organic matter additive amount S and activity of DO fall △ DO condition
Sludge diluent concentration MLSS is constant, as curve total duration t3When < 120min, then reduce aerator aeration quantity parameter
kLa；As curve total duration t3When > 600min, then increase aerator aeration quantity parameter kLa；By constantly adjusting kLA,
Make curve total duration t3: 120≤t3≤600min；
If 2c) above-mentioned steps 2b) in by constantly adjust kLA, in aerator aeration quantity parameter kLNothing in a controlled range
Method realizes curve total duration t3: 120≤t3≤ 600min then adjusts organic matter additive amount S, is not changing the DO decline stage
Duration t1: 5≤t1Under the premise of≤25min and DO fall △ DO:0.2≤△ DO≤6.0mg/L, realize that curve is always held
Continuous time t3: 120≤t3≤600min；
2d) in above-mentioned steps 2a), 2b) and 2c) in comprehensive determining organic matter amount S and aerator aeration quantity parameter
kLUnder the conditions of a, obtained DO-t curve, as breathing map DO-t curve, while breathing map DO-t curve can be obtained and risen
Stage inflection point time of occurrence t2: 30≤t2≤300min。
The condition control that map DO-t curve is breathed by above-mentioned acquisition, can be obtained the aeration quantity parameter according to aerator
kLA controls organic matter additive amount S, obtains breathing map DO-t curve, the control method are as follows:
2a ˊ) if organic matter is single carbon source sodium acetate, corresponding relationship numerically is S=(0.23~136) kLa；
2b ˊ) if organic matter is single carbon source glucose, corresponding relationship numerically is S=(0.38~231) kLa；
2c ˊ) if organic matter is mixed carbon source sanitary sewage, corresponding relationship numerically is S=(1.25~750) kLa。
Additive amount S unit mg/L, kLA unit h-1。
3) the saturation oxygen dissolving value C* under sludge existence condition, the aerator aeration quantity selected in combination with step 2) are selected
Parameter kLA, according to formulaThe breathing map DO-t curve conversion that step 2) is obtained
To breathe map OUR-t curve；
Wherein,Derivative for the practical oxygen dissolving value on breathing map DO-t curve to the time, kLA is aerator exposure
Tolerance parameter kLA, C* are that oxygen dissolving value is saturated under sludge existence condition, and C is practical oxygen dissolving value, and OUR is respiratory rate OUR.
4) on the breathing map OUR-t curve that step 3) obtains, respiratory rate OUR catastrophe point B and respiratory rate are determined
OUR change terminating point C, then found on corresponding breathing map DO-t curve respiratory rate OUR catastrophe point B corresponding points B ˊ with
Respiratory rate OUR changes terminating point C corresponding points C ˊ；Connection breathing map DO-t curve starting point A and point C ˊ, to breathe map
A, B ˊ two o'clock line are line of demarcation on DO-t curve, and breathing map DO-t curve is divided into two regions, line AB ˊ and spirogram
It composes DO-t curve and constitutes region I；Line AB ˊ, line AC ˊ and breathing map DO-t curve constitute region II；
Above-mentioned breathing map DO-t curve starting point A is addition organic matter synchronization point；The breathing map OUR-t is bent
Respiratory rate OUR catastrophe point B is the very fast turning point being varied down to during tending to be steady of respiratory rate OUR on line, is being breathed
Corresponding points B ˊ on map DO-t curve is the corresponding points on B point synchronization breathing map DO-t curve；The breathing map
It is that respiratory rate OUR varies less the turnover tended in constant process that respiratory rate OUR, which changes terminating point C, on OUR-t curve
Point is the corresponding points on C point synchronization breathing map DO-t curve in the corresponding points C ˊ on breathing map DO-t curve.
5) according to I area ratio of region II/region, activated sludge dephosphorizing efficiency, I area ratio of region II/region are assessed
Bigger, activated sludge dephosphorizing efficiency is higher.
Effect of the present invention is further illustrated below by specific embodiment.
1) (each sewage plant overview is shown in Table 1) is sampled to from multiple sludge sewages in Xi'an；
2) the WBM450 series wisdom operation work station for selecting Xi'an Lv Biao water environment Science and Technology Ltd. to provide is as obtaining
The equipment for obtaining activated sludge breathing map DO-t curve；
3) sludge sewage is taken, and is diluted with the ratio of volume ratio 1:3 addition tap water, by activated sludge sample
Product pass through 1/2 volume stir, precipitate, removing supernatant, being settled to activated sludge dilution, are washed mud 3 times with PBS buffer solution,
Active sludge intermixture is settled to the original volume of activated sludge dilution by addition tap water later, and (activated sludge is by aeration 2h
Into endogenous respiration state).
Buffer solution PBS:
A:KH2PO4Concentration is 1.7mmolL-1；
B:Na2HPO4Concentration is 10mmolL-1；
C:NaCl concentration is 137mmolL-1；
D:KCl concentration is 2.8mmolL-1。
4) the aeration quantity parameter k of aerator is selectedLA=10.06h-1, in the sludge that step 3) enters endogenous respiration,
According to selected parameter kLA=10.06h-1, the amount S that single carbon source sodium acetate is added in control is 3kLA, i.e. 30.18mg/L, 20
Breathing map DO-t curve is obtained at a temperature of ± 0.5 DEG C, as shown in Figure 1；
5) the saturation oxygen dissolving value C*=8.4mg/L under sludge existence condition, the aeration selected in combination with step 4) are selected
Equipment aeration quantity parameter kLA=10.06h-1, according to formulaIt is exhaled what step 4) obtained
It inhales map DO-t curve and is converted into breathing map OUR-t curve；
Wherein,Derivative for the practical oxygen dissolving value on breathing map DO-t curve to the time, kLA is aerator exposure
Tolerance parameter kLA, C* are that oxygen dissolving value is saturated under sludge existence condition, and C is practical oxygen dissolving value, and OUR is respiratory rate OUR.
On the breathing map OUR-t curve of acquisition, respiratory rate OUR catastrophe point B and respiratory rate OUR variation are determined eventually
Then stop C finds respiratory rate OUR catastrophe point B corresponding points B ˊ and respiratory rate on corresponding breathing map DO-t curve
OUR changes terminating point C corresponding points C ˊ.Connection breathing map DO-t curve starting point A and point C ˊ, to breathe on map DO-t curve
A, B ˊ two o'clock line is line of demarcation, and breathing map DO-t curve is divided into two regions, line AB ˊ and breathing map DO-t curve
Constitute region I；Line AB ˊ, line AC ˊ and breathing map DO-t curve constitute region II；
Embodiment analysis:
I area ratio of region II/region is the same as dirty on the breathing map DO-t curve of four sewage treatment plants (A, B, C and D)
Relationship between the practical dephosphorization efficiency of water factory, as shown in Figure 2.Major water factory's activated sludge is taken, breathing map DO-t curve is obtained, obtains
Respective I area ratio of region II/region, size are ordered as D > C > B > A.By measure major sewage treatment plant inflow,
It is discharged TP, obtains the practical dephosphorization efficiency of sewage treatment plant, size sequence are as follows: D > C > B > A.It is clear that at four sewage
The corresponding practical dephosphorization efficiency height of the I area ratio size of region II/region that reason factory's activated sludge is tested sorts
Unanimously, it fits like a glove.That is, being calculated by taking sludge sewage to obtain breathing map DO-t curve
I area ratio of region II/region, can the practical dephosphorization efficiency of this water factory of accurate evaluation, be shown in Table 2.
To sum up, the present invention is a kind of method based on breathing map assessment activated sludge dephosphorizing efficiency.
1 sewage treatment plant's overview of table
2 different sewage treatment plant embodiment of table
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
It is lasting that the DO-t curve DO decline stage is controlled by the way of adjusting organic matter additive amount S and activated sludge diluent concentration MLSS
Time t1, DO fall △ DO and curve total duration t3, to obtain in breathing map DO-t curve procedures, table 2 is only
Give preferred embodiment, the organic matter that the claims in the present invention limit as single carbon source and mixed carbon source numerically with
kLThe value protection range of a corresponding relationship can satisfy the requirement that the present invention obtains breathing map DO-t curve.It is any to be familiar with
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those skilled in the art, should all cover
Within protection scope of the present invention.
Claims (8)
1. a kind of method based on breathing map assessment activated sludge dephosphorizing efficiency, which is characterized in that this method includes following step
It is rapid:
1) sludge sewage is taken, activated sludge is cleaned multiple times with buffer solution, and sufficiently aeration makes to live
Property sludge enters endogenous respiration state；
2) the aeration quantity parameter k of aerator is selectedLA, in the activated sludge that step 1) enters endogenous respiration state, according to choosing
Fixed aeration quantity parameter kLA controls organic matter additive amount S, and according to the practical dephosphorization characteristics of activated sludge, adjusts aeration quantity ginseng
Number obtains breathing map DO-t curve；
3) the saturation oxygen dissolving value C* under activated sludge existence condition, the aerator aeration quantity selected in combination with step 2) are selected
Parameter kLA converts breathing map OUR-t curve for the breathing map DO-t curve that step 2) obtains according to formula, under
Formula is stated to convert to obtain:
Wherein,It is the practical oxygen dissolving value on breathing map DO-t curve to the derivative of time, kLa is aerator aeration quantity
Parameter, C* are that oxygen dissolving value is saturated under sludge existence condition, and C is practical oxygen dissolving value, and OUR is respiratory rate OUR；
The breathing map DO-t curve meets the following conditions:
DO duration decline stage t1: 5≤t1≤25min；
Fall △ DO:0.2≤△ DO≤6.0mg/L of DO decline stage；
DO-t curve total duration t3, 120≤t3≤600min；
4) on the breathing map OUR-t curve that step 3) obtains, determine that respiratory rate OUR catastrophe point B and respiratory rate OUR become
Change terminating point C, respiratory rate OUR catastrophe point B corresponding points B ˊ and breathing are then found on corresponding breathing map DO-t curve
Rate OUR changes terminating point C corresponding points C ˊ；Connection breathing map DO-t curve starting point A and point C ˊ, it is bent to breathe map DO-t
A, B ˊ two o'clock line are line of demarcation on line, and breathing map DO-t curve is divided into two regions, line AB ˊ and breathing map DO-t
Curve constitutes region I；Line AB ˊ, line AC ˊ and breathing map DO-t curve constitute region II；
Respiratory rate OUR catastrophe point B is that very fast be varied down to of respiratory rate OUR is tended to be steady on the breathing map OUR-t curve
Turning point in the process；Respiratory rate OUR changes terminating point C as respiratory rate OUR variation on the breathing map OUR-t curve
Very little is to the turning point tended in constant process；
5) according to I area ratio of region II/region, activated sludge dephosphorizing efficiency is assessed, I area ratio of region II/region is bigger,
Activated sludge dephosphorizing efficiency is higher.
2. a kind of method based on breathing map assessment activated sludge dephosphorizing efficiency described in accordance with the claim 1, feature exist
In in the step 1), activated sludge enters the detailed process of endogenous respiration state are as follows:
Sludge sewage is taken, and is diluted with the ratio of volume ratio 1:3 addition tap water, activated sludge sample is passed through
1/2 volume stir, precipitate, removing supernatant, being settled to activated sludge dilution washes mud 3 times with PBS buffer solution, Zhi Houtian
Add tap water that active sludge intermixture is settled to the original volume of activated sludge dilution, be aerated 2h, activated sludge enters endogenous
Respiratory state.
3. a kind of method based on breathing map assessment activated sludge dephosphorizing efficiency described in accordance with the claim 1, feature exist
In in the step 2), the following condition controls of breathing map DO-t curve negotiating are obtained:
Organic matter additive amount S and activated sludge diluent concentration MLSS 2a) is adjusted, DO decline stage duration t is controlled1: 5≤
t1≤ 25min and DO fall △ DO:0.2≤△ DO≤6.0mg/L；
Wherein, △ DO refers to the DO difference of DO and DO decline stage the end point D of breathing map DO-t curve starting point A；
As DO duration decline stage t1When < 5min or DO fall △ DO < 0.2mg/L, then increase organic matter addition
Measure S or activated sludge diluent concentration MLSS；
As DO duration decline stage t1When > 25min or DO fall △ DO > 6.0mg/L, then organic matter is reduced
Measure S or activated sludge diluent concentration MLSS；
By constantly adjusting organic matter additive amount S and activated sludge diluent concentration MLSS, make DO duration decline stage t1: 5
≤t1≤ 25min and DO fall △ DO:0.2≤△ DO≤6.0mg/L；
2b) keep above-mentioned steps 2a) obtained in organic matter additive amount S and activated sludge diluent concentration MLSS it is constant, pass through
Adjust aerator aeration quantity parameter kLA controls DO-t curve total duration t3: 120≤t3≤600min；
Wherein, t3Change the time point to go to zero for the slope of curve；
Holding meets DO duration decline stage t1With the organic matter additive amount S and activated sludge of DO fall △ DO condition
Diluent concentration MLSS is constant, as curve total duration t3When < 120min, then reduce aerator aeration quantity parameter kLa；When
Curve total duration t3When > 600min, then increase aerator aeration quantity parameter kLa；By constantly adjusting kLA makes curve
Total duration t3: 120≤t3≤600min；
If 2c) above-mentioned steps 2b) in by constantly adjust kLA, in aerator aeration quantity parameter kLIt can not be real in a controlled range
Existing curve total duration t3: 120≤t3≤ 600min then adjusts organic matter additive amount S, lasting not changing the DO decline stage
Time t1: 5≤t1Under the premise of≤25min and DO fall △ DO:0.2≤△ DO≤6.0mg/L, when realizing that curve always continues
Between t3: 120≤t3≤600min；
2d) in above-mentioned steps 2a), 2b) and 2c) in comprehensive determining organic matter amount S and aerator aeration quantity parameter kLA item
Under part, obtained DO-t curve, as breathing map DO-t curve, while breathing map DO-t curve ascent stage can be obtained and turned
Point time of occurrence t2: 30≤t2≤300min。
4. a kind of method based on breathing map assessment activated sludge dephosphorizing efficiency described in accordance with the claim 3, feature exist
In the adjustment activated sludge diluent concentration MLSS adjustable range is 250~5000mg/L.
5. a kind of method based on breathing map assessment activated sludge dephosphorizing efficiency described in accordance with the claim 1, feature exist
In the organic matter is single carbon source: sodium acetate, glucose, or is mixed carbon source: sanitary sewage；Step 2) foundation is selected
Aerator aeration quantity parameter kLA controls organic matter additive amount S, and control method is as follows:
2a ˊ) if organic matter is single carbon source sodium acetate, corresponding relationship numerically is S=(0.23~136) kLa；
2b ˊ) if organic matter is single carbon source glucose, corresponding relationship numerically is S=(0.38~231) kLa；
2c ˊ) if organic matter is mixed carbon source sanitary sewage, corresponding relationship numerically is S=(1.25~750) kLa；Addition
Measure S unit mg/L, kLA unit h-1。
6. a kind of method based on breathing map assessment activated sludge dephosphorizing efficiency described in accordance with the claim 1, feature exist
In the temperature control that step 2) obtains breathing map DO-t curve procedures is 8~40 DEG C.
7. a kind of method based on breathing map assessment activated sludge dephosphorizing efficiency described in accordance with the claim 1, feature exist
In in step 1), the buffer solution of the cleaning sludge is PBS buffer solution, which is following components mixed liquor:
A:KH2PO4Concentration is 1.5~2.5mmolL-1；
B:Na2HPO4Concentration is 8~12mmolL-1；
C:NaCl concentration is 135~140mmolL-1；
D:KCl concentration is 2.5~3.0mmolL-1。
8. a kind of method based on breathing map assessment activated sludge dephosphorizing efficiency described in accordance with the claim 1, feature exist
In in step 5), the breathing map DO-t curve starting point A is addition organic matter synchronization point；The breathing map
Corresponding points B ˊ of the respiratory rate OUR catastrophe point B on breathing map DO-t curve is the breathing of B point synchronization on OUR-t curve
Corresponding points on map DO-t curve；Respiratory rate OUR changes terminating point C in spirogram on the breathing map OUR-t curve
Composing the corresponding points C ˊ on DO-t curve is the corresponding points on C point synchronization breathing map DO-t curve.
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| JP5347711B2 (en) * | 2009-05-21 | 2013-11-20 | 新日鐵住金株式会社 | Detection method of harmful substances in water |
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