CN108455760A - A method of degradation nitration waste water COD - Google Patents
A method of degradation nitration waste water COD Download PDFInfo
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- CN108455760A CN108455760A CN201810319495.2A CN201810319495A CN108455760A CN 108455760 A CN108455760 A CN 108455760A CN 201810319495 A CN201810319495 A CN 201810319495A CN 108455760 A CN108455760 A CN 108455760A
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- waste water
- solution
- cod
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Application is implemented to be illustrated a kind of method of degradation nitration waste water COD, the method includes：PAC is added into nitration waste water, is uniformly mixed, obtains mixed solution；Piece alkali is added into above-mentioned mixed solution, adjusts the PH of mixed solution, solution is made to flocculate；Flocculation solution is filtered, mother liquor is obtained；Test the COD value of mother liquor；The method of degradation nitration waste water COD shown in the embodiment of the present application a kind of, suitable PAC, which is added, can play larger degradation, reduce cleaning cost, and when PAC additions account for the 1.5% of wastewater flow rate, the degradation effect of nitration waste water COD is best；Appropriate piece alkali is added into mixed solution, adjusts the PH to 79 of mixed solution, solution is made to flocculate, the suction filtration separation after being convenient for, when piece alkali addition accounts for the 0.125% of wastewater flow rate, the flocculating effect of solution is best, it is easier to which the suction filtration for the solution that flocculates detaches.When PAC additions account for the 1.5% of wastewater flow rate, and piece alkali addition accounts for the 0.125% of wastewater flow rate, the degradation rate of nitration waste water COD is up to 72.46%.
Description
Technical field
The present invention relates to technical field of sewage, more particularly to a kind of method of degradation nitration waste water COD.
Background technology
A large amount of nitration waste water is will produce in crude product production, the organic matter in nitration waste water is mainly 3- nitro-N- ethyls
Carbazole, 3,8- dinitro-N- ethyl carbazoles, pull open powder, chlorobenzene etc. are clean manufacturing, reduce environmental pressure, and the nitrification that degrade is useless
Water COD reaches the standard of discharge.
Currently, common degradation nitration waste water COD methods are divided into three kinds, i.e. Physical, chemical method, bioanalysis both at home and abroad.
Wherein, Physical is based on absorption method, and for chemical method based on the advanced oxidation processes in chemical oxidization method, bioanalysis mainly has oxidation
Pool method, anaerobic biochemical etc..The cost is relatively high for chemical method, and economy is very low when use；Nitration waste water acidity is extremely strong, unfavorable
In microbe survival, therefore, bioanalysis also is difficult to be effectively treated.Absorption method be for nitration waste water handle one kind it is economic and practical
Effective ways.
The prior art frequently with the mixed liquor of PAC and PAM come the nitration waste water COD that degrades, but the PAC of the prior art prepare it is dense
Degree is most of, and 30% or so, dosage is high, of high cost, and purified flocculation solution is not easy to filter separation, influences COD
Degradation effect；Therefore, it is badly in need of a kind of method of economical and effective degradation nitration waste water COD, degrade nitration waste water COD, makes nitrification
Waste water reaches the standard of discharge
Invention content
The embodiment of the present invention provides a kind of method of degradation nitration waste water COD, and a small amount of PAC is added as flocculant energy
Reach apparent COD degradation effect, and purified flocculation solution is easy to filter separation.
The embodiment of the present application shows a kind of method of degradation nitration waste water COD, the described method comprises the following steps：
PAC is added into nitration waste water, is uniformly mixed, obtains mixed solution；
Piece alkali is added into above-mentioned mixed solution, adjusts the PH of mixed solution, solution is made to flocculate；
Flocculation solution is filtered, mother liquor is obtained；
Test the COD value of mother liquor.
Optionally, described the step of PAC is added into nitration waste water, the addition of the PAC and the nitration waste water amount
Mass ratio be 3：200.
Optionally, described the step of piece alkali is added into above-mentioned mixed solution, the addition of described alkali and the nitrification
The mass ratio of wastewater flow rate is 1:800.
Optionally, described that PAC is added into nitration waste water, the step of being uniformly mixed, obtain mixed solution, the mixing is molten
The PH of liquid is 5-6.
Optionally, described that piece alkali is added into above-mentioned mixed solution, the PH of mixed solution is adjusted, the flocculated step of solution is made
Suddenly, specially：Piece alkali is added into above-mentioned mixed solution, adjusts the PH to 7-9 of mixed solution, solution is made to flocculate.
Optionally, the step of COD value of the test mother liquor, specially：The COD value of mother liquor is tested using COD analyzers.
By above technical scheme as it can be seen that the embodiment of the present application shows a kind of method of degradation nitration waste water COD, the side
Method includes：PAC is added into nitration waste water, is uniformly mixed, obtains mixed solution；Piece alkali is added into above-mentioned mixed solution, adjusts
The PH for saving mixed solution, makes solution flocculate；Flocculation solution is filtered, mother liquor is obtained；Test the COD value of mother liquor；The embodiment of the present application
The method of the degradation nitration waste water COD shown a kind of, suitable PAC, which is added, can play larger degradation, reduce clear
Clean expense, when PAC additions account for the 1.5% of wastewater flow rate, the degradation effect of nitration waste water COD is best；Add into mixed solution
Enter appropriate piece alkali, adjusts the PH to 7-9 of mixed solution, solution is made to flocculate, the suction filtration separation after being convenient for, when piece alkali addition accounts for
Wastewater flow rate 0.125% when, the flocculating effect of solution is best, it is easier to which the suction filtration of the solution that flocculates detaches.When PAC additions account for it is useless
The 1.5% of water, when piece alkali addition accounts for the 0.125% of wastewater flow rate, the degradation rate of nitration waste water COD is up to 72.46%.Pass through
Using inorganic polymer coagulant PAC degradation nitration waste water COD, cost reduction, method is simple, and COD degradation rate is promoted.
Description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without creative efforts, also
It can be obtain other attached drawings according to these attached drawings.
Fig. 1 is the flow chart for the method that a kind of degradation nitration waste water COD exemplified is preferably implemented in the application one.
Specific implementation mode
In order to make those skilled in the art more fully understand the technical solution in the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without making creative work, should all belong to protection of the present invention
Range.
Refering to fig. 1, the embodiment of the present application shows a kind of method of degradation nitration waste water COD, includes the following steps：
S1：PAC is added into nitration waste water, is uniformly mixed, obtains mixed solution；
Specifically, PAC is added into nitration waste water, is uniformly mixed, it is 5-6, as faintly acid to make the PH of mixed solution；
PAC (aluminium polychloride) is added in nitration waste water, since the polymerization of the bridging action and multivalent anions of hydroxide ion is made
With and generate that molecular weight is larger, the higher inorganic polymer water treatment agent of charge.When PAC is added in nitration waste water, formed
Molecular weight is larger, the higher inorganic polymer of charge can adsorb the nitro compounds (3- nitro-N- ethyl clicks in nitration waste water
Azoles, 3,8- dinitro-N- ethyl carbazoles, pull open powder, chlorobenzene etc.), achieve the purpose that the nitration waste water COD that degrades；
Specifically, the effect of PAC is by the compression double electric layer of it or it hydrolysate, electrically neutralization, winding net
The effect completion of four aspects such as bridging is caught and adsorbs, it will be by under the oxidizing particulate matter precipitation for causing COD
It filters out, to achieve the purpose that the COD that degrades, particulate matter precipitates after absorption, reduces suspended matter, and PAM is macromolecule
Flocculant, organic polymer coargulator have the resulting huge adsorption effect of flco that bigger is formed between particle,
Adsorption capacity is high.
When the addition of the PAC and the mass ratio of the nitration waste water amount are 3：200, i.e. PAC additions account for wastewater flow rate
1.5% when, the degradation effect of nitration waste water COD is best.
S2：Piece alkali is added into above-mentioned mixed solution, adjusts the PH of mixed solution, solution is made to flocculate；
Specifically, piece alkali is added into above-mentioned mixed solution, adjusts the PH to 7-9 of mixed solution, solution is made to flocculate；It is added
The purpose of piece alkali is to adjust the PH of mixed solution, makes the PH of mixed solution for 7-9, that is, be in alkalescent, reduce the hardness of water；Add
After entering PAC, although the nitro compounds in nitration waste water can be adsorbed, its flocculating setting effect is poor, is not easy to subsequent suction filtration
Separation, dissolubility of the nitro compounds in waste water can be reduced by being subsequently to added into suitable alkali, and solution is made to flocculate, and be divided convenient for filtering
From.
When the addition of described alkali and the mass ratio of the nitration waste water amount are 1:800, i.e. piece alkali addition accounts for waste water
Amount 0.125% when, the flocculating effect of solution is best, it is easier to which the suction filtration of the solution that flocculates detaches.
The alkaline matters such as potassium hydroxide can also be added into mixed solution, adjust the PH of mixed solution, solution is made to flocculate, i.e.,
Alkaline matter is added, the PH of solution can be adjusted, solution is made to flocculate, the preferred piece alkali (sodium hydroxide) of the embodiment of the present application is main
Will because of piece alkali (sodium hydroxide) cost it is low.
S3：Flocculation solution is filtered, mother liquor is obtained；
S4：Test the COD value of mother liquor；Specifically, there are many detection methods of nitration waste water COD, including, potassium dichromate method
COD measurement, coulometry COD measurement, Catalysis Quickening Method COD measurement, energy-saving heating method COD measurement, the survey of colorimetric method COD speed etc. are numerous
Method measures, and the embodiment of the present application is surveyed using colorimetric method COD speed, that is, utilizes the COD value of COD analyzers test mother liquor.
In order to enable those skilled in the art to better understand the solution of the present invention, below knot and embodiment to the present invention make into
The detailed description of one step.
Embodiment 1：
Nitration waste water 200g is taken, the COD value of nitration waste water is 3185, and the PAC of 5g, mixing are added into above-mentioned nitration waste water
Uniformly, mixed solution is obtained, 1g NaoH are added into above-mentioned mixed solution, adjusts the PH to 9 of mixed solution, solution is made to flocculate,
Flocculation solution is filtered, mother liquor is obtained, the COD value of mother liquor is tested using COD analyzers.
By the measurement of COD analyzers, the COD value of the nitration waste water after above-mentioned degradation is 1245, nitration waste water COD degradation
Rate is 60.91%.
Embodiment 2：
Nitration waste water 200g is taken, the COD value of nitration waste water is 3185, and the PAC of 2.5g is added into above-mentioned nitration waste water, is mixed
It closes uniformly, obtains mixed solution, 0.5g NaoH are added into above-mentioned mixed solution, adjusts the PH to 9 of mixed solution, makes solution
Flocculation is filtered flocculation solution, obtains mother liquor, the COD value of mother liquor is tested using COD analyzers.
By the measurement of COD analyzers, the COD value of the nitration waste water after above-mentioned degradation is 1175, nitration waste water COD degradation
Rate is 63.11%.
Embodiment 3：
Nitration waste water 200g is taken, the COD value of nitration waste water is 3185, and the PAC of 5g, mixing are added into above-mentioned nitration waste water
Uniformly, mixed solution is obtained, 0.25g NaoH are added into above-mentioned mixed solution, adjusts the PH to 7 of mixed solution, solution is made to wad a quilt with cotton
It is solidifying, flocculation solution is filtered, mother liquor is obtained, the COD value of mother liquor is tested using COD analyzers.
By the measurement of COD analyzers, the COD value of the nitration waste water after above-mentioned degradation is 1065, nitration waste water COD degradation
Rate is 66.56%.
Embodiment 4：
Nitration waste water 200g is taken, the COD value of nitration waste water is 3185, and the PAC of 3g, mixing are added into above-mentioned nitration waste water
Uniformly, mixed solution is obtained, 0.25g NaoH are added into above-mentioned mixed solution, adjusts the PH to 8 of mixed solution, solution is made to wad a quilt with cotton
It is solidifying, flocculation solution is filtered, mother liquor is obtained, the COD value of mother liquor is tested using COD analyzers.
By the measurement of COD analyzers, the COD value of the nitration waste water after above-mentioned degradation is 877, nitration waste water COD degradation
Rate reaches 72.46%.
Embodiment 5：
Nitration waste water 200g is taken, the COD value of nitration waste water is 3185, and the PAC of 2g, mixing are added into above-mentioned nitration waste water
Uniformly, mixed solution is obtained, 0.25g NaoH are added into above-mentioned mixed solution, adjusts the PH to 7 of mixed solution, solution is made to wad a quilt with cotton
It is solidifying, flocculation solution is filtered, mother liquor is obtained, the COD value of mother liquor is tested using COD analyzers.
By the measurement of COD analyzers, the COD value of the nitration waste water after above-mentioned degradation is 1515, nitration waste water COD degradation
Rate is 52.43%.
According to the above method, the parallel laboratory test result done is as follows：When PAC amounts account for the 1.5% of wastewater flow rate, piece alkali number accounts for waste water
Amount 0.125% when, the degradation rate of COD is maximum, is 72.46%, and the COD value after degradation is less than 1000, and degrading waste water plays
Maximum effect reaches processing requirement.It follows that PAC additions account for the 1.5% of wastewater flow rate, piece alkali addition accounts for wastewater flow rate
0.125%, maximum COD degradation rate can be reached.
By above technical scheme as it can be seen that the embodiment of the present application shows a kind of method of degradation nitration waste water COD, the side
Method includes：PAC is added into nitration waste water, is uniformly mixed, obtains mixed solution；Piece alkali is added into above-mentioned mixed solution, adjusts
The PH for saving mixed solution, makes solution flocculate；Flocculation solution is filtered, mother liquor is obtained；Test the COD value of mother liquor；The embodiment of the present application
The method of the degradation nitration waste water COD shown a kind of, suitable PAC, which is added, can play larger degradation, reduce clear
Clean expense, when PAC additions account for the 1.5% of wastewater flow rate, the degradation effect of nitration waste water COD is best；Add into mixed solution
Enter appropriate piece alkali, adjusts the PH to 7-9 of mixed solution, solution is made to flocculate, the suction filtration separation after being convenient for, when piece alkali addition accounts for
Wastewater flow rate 0.125% when, the flocculating effect of solution is best, it is easier to which the suction filtration of the solution that flocculates detaches.When PAC additions account for it is useless
The 1.5% of water, when piece alkali addition accounts for the 0.125% of wastewater flow rate, the degradation rate of nitration waste water COD is up to 72.46%.Pass through
Using inorganic polymer coagulant PAC degradation nitration waste water COD, cost reduction, method is simple, and COD degradation rate is promoted.
Those skilled in the art will readily occur to its of the application after considering specification and putting into practice application disclosed herein
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the application, these modifications, purposes or
Person's adaptive change follows the general principle of the application and includes the undocumented common knowledge in the art of the application
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are by above
Claim is pointed out.
It should be understood that the application is not limited to the accurate flow for being described above and being shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.Scope of the present application is only limited by the accompanying claims.
Claims (6)
1. a kind of method of degradation nitration waste water COD, which is characterized in that the described method comprises the following steps：
PAC is added into nitration waste water, is uniformly mixed, obtains mixed solution；
Piece alkali is added into above-mentioned mixed solution, adjusts the PH of mixed solution, solution is made to flocculate；
Flocculation solution is filtered, mother liquor is obtained；
Test the COD value of mother liquor.
2. the method for degradation nitration waste water COD according to claim 1 a kind of, which is characterized in that described to nitration waste water
The mass ratio of the step of middle addition PAC, the addition of the PAC and the nitration waste water amount is 3：200.
3. the method for degradation nitration waste water COD according to claim 1 a kind of, which is characterized in that described to above-mentioned mixing
The mass ratio of the step of piece alkali is added in solution, the addition of described alkali and the nitration waste water amount is 1:800.
4. the method for degradation nitration waste water COD according to claim 1 a kind of, which is characterized in that described to nitration waste water
The PH of the step of middle addition PAC is uniformly mixed, obtains mixed solution, the mixed solution is 5-6.
5. the method for degradation nitration waste water COD according to claim 1 a kind of, which is characterized in that described to above-mentioned mixing
Piece alkali is added in solution, the step of adjusting the PH of mixed solution, solution is made to flocculate, specially：
Piece alkali is added into above-mentioned mixed solution, adjusts the PH to 7-9 of mixed solution, solution is made to flocculate.
6. the method for degradation nitration waste water COD according to claim 1 a kind of, which is characterized in that the test mother liquor
The step of COD value, specially：
The COD value of mother liquor is tested using COD analyzers.
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Application publication date: 20180828 |