CN108862871A - A kind of method for the treatment of of dyeing wastewater and reuse - Google Patents
A kind of method for the treatment of of dyeing wastewater and reuse Download PDFInfo
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- CN108862871A CN108862871A CN201810785419.0A CN201810785419A CN108862871A CN 108862871 A CN108862871 A CN 108862871A CN 201810785419 A CN201810785419 A CN 201810785419A CN 108862871 A CN108862871 A CN 108862871A
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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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/286—Anaerobic digestion processes including two or more steps
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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
- C02F7/00—Aeration of stretches of water
Abstract
The present invention relates to field of waste water treatment more particularly to a kind of methods for the treatment of of dyeing wastewater and reuse.The present invention includes the following steps：(1) dyeing waste water aeration stops, and adjusts PH；(2) decoloration coagulant settles；(3) hydrolysis acidification；(4) catalytic oxidation；(5) Anaerobic Treatment；(6) MBBR film process；(7) high-efficient shallow air flotation；(8) Fenton's reaction；(9) neutralization precipitation；(10) micro-filtration is handled, and is recycled after adjusting PH.The present invention is especially suitable for the dyeing waste waters of high cod values can will be discharged COD value control 60 hereinafter, coloration control reaches the standard of direct emission below 32 by the combination adjustment and the optimization of technological parameter to process；Recovery Purifying is further processed to a part water outlet simultaneously to utilize, and realizes energy-saving and emission-reduction；By the optimization to process flow, reduce the generation of the wastes such as sludge；Optimize details of operation, controls operating cost and safety.
Description
Technical field
The present invention relates to field of waste water treatment more particularly to a kind of methods for the treatment of of dyeing wastewater and reuse.
Background technique
Dyeing is highly water intensive industry, in cotton, fiber crops, chemical fibre and its blended fabric textile product in pretreatment, dye
A large amount of dyeing waste water can be generated during color, stamp and arrangement, the dyeing waste water of these discharges has coloration big, organic contamination
The features such as object content is high, and pH value variation range is big, water quality and quantity is changed greatly, belongs to one of intractable industrial wastewater.In recent years
Come, with the rapid development of dye industry, the increasingly increase of the kind and quantity of dyestuff, the appearance of a large amount of fiber products, new
Chemical sizwe, the use for contaminating material and finishing agent, greatly change the property of dyeing waste water；Secondly because dyeing is processed
Mode is different, and dyeing process is also different, and the waste water COD and coloration that dyeing and printing process is discharged have a larger increase, it is above-mentioned because
Treatment of dyeing wastewater difficulty has been significantly greatly increased in plain collective effect.
The processing method of current dyeing waste water mainly has physical-chemical process and bioanalysis and two classes.As dyeing waste water is arranged
Put that standard is all the more stringent, single processing method is difficult that dyeing waste water is made to reach preferable treatment effect, even if using physico
Method-bioanalysis combination technique also can not meet the requirement up to standard for capableing of direct emission of most for the treatment of of dyeing wastewater.Especially
It is, still containing substances, COD content such as certain density suspended matter, colorations, to need to improve after the treatment of dyeing wastewater to high concentration
Treatment process, further progress advanced treating accomplish direct emission up to standard.In addition, how dyeing reduces the discharge of waste water
Amount also perplexs the problem of enterprise, if it is possible to by wastewater treatment, waste water reclamation be recycled, will become printing and dyeing
One important way of enterprise's realization sustainable development.Solve the key that recycles of dyeing waste water regeneration be to develop it is low
Honest and clean, high-efficient processing system researchs and develops novel further treatment technique and extension wastewater regenerating and recycling approach.
Summary of the invention
The technical problem to be solved by the present invention is to：In view of the above problems, a kind for the treatment of of dyeing wastewater side is provided
Method, by adjusting processing step, reasonable arrangement process, Optimizing Process Parameters, so that the printing and dyeing water of high COD and high chroma is by this
The processing of method is able to achieve a part of direct emission, and a part is back to the recycling of front end process.
Summary of the invention of the invention is as follows：
A kind of method for the treatment of of dyeing wastewater and reuse, includes the following steps：
(1) dyeing waste water aeration stops, and adjusts PH；(2) decoloration coagulant settles；(3) hydrolysis acidification；(4) catalytic oxidation；
(5) Anaerobic Treatment；(6) MBBR is handled；(7) high-efficient shallow air flotation；(8) Fenton's reaction；(9) neutralization precipitation；(10) micro-filtration is handled,
It is recycled after adjusting PH.
Optimization, the method for the treatment of of dyeing wastewater and reuse includes the following steps：
(1) dyeing waste water is aerated residence time 6-10 hour in conditioning tank, and adjusting PH is 9-10.5, preliminary to reduce water outlet
COD；
(2) conditioning tank water outlet introduces decoloration coagulant settling tank, and coagulant is added and flocculation aid is settled, further decreases
The COD concentration of water quality；
(3) after the water outlet of decoloration coagulant settling tank enters hydrolysis acidification pool, the residence time is to control PH 7.5- after 6-9 hours
8.0；
(4) hydrolysis acidification pool water outlet enters contact-oxidation pool, and the residence time is after 20-24 hours, and water outlet is heavy through a heavy pond
Drop；
(5) one sinking pool effluents enter anaerobic tower, and the residence time is 35-40 hours；
(6) it is 20-24 hours that anaerobic tower, which was discharged into the pond the MBBR residence time, and then water outlet is by secondary settling tank sedimentation；
(7) secondary clarifier effluent enters the processing of high-efficient shallow air flotation pond；
(8) flotation tank water outlet enters Fenton's reaction tower, and ferrous sulfate is added and hydrogen peroxide is reacted, is adjusted with acid pH value
For 3.0-4.0, reaction temperature controls 30-45 DEG C, stops 2 hours；
(9) water outlet enters sedimentation basin, and alkali and flocculation aid neutralization precipitation, direct emission after a part disinfection is added；Another portion
Divide and enters microstrainer；
(10) water outlet enters microstrainer and filters small wadding body, and after disinfection, adjusting PH with dyeing acid is 7.5-8.5, and originally
Water mixing is sent to pre-treatment and boils drift hot wash process and dyeing colour developing machine washing step use.
Optimization, in step 1, dyeing waste water can backwash back with sludge condensation water, pressure dirt water and each process equipment
Flowing water mixing, the processing requirement of dyeing waste water is more stringent compared to its Conventional waste water, therefore can be by the waste water collection of production system
At processing.
Optimization, the alkali being added in the step 9 is NaOH, flocculation aid PAM；Wherein, in the water body of direct emission
The injected volume of NaOH is 0.5-0.7g/L, and control PH is 7.0-8.5；Injected volume into the water body NaOH of microstrainer is 0.8-
1.1g/L, control PH are 10-10.5.Fenton's reaction tower need to be discharged and carry out shunting processing by the accumulation of inorganic salts in order to prevent.Its
It is direct emission after 7.0-8.5 is sterilized that middle a part, which adjusts PH by alkali,；Another part in order to improve the effect of flocculation and micro-filtration,
Then needing control PH is 10-10.5.
Optimization, in the step 9, the water of direct emission accounts for the half of Fenton's reaction tower water yield.
Optimization, the flocculation aid in the step 2 is PAM, and additional amount 1.5-3.0mg/L, coagulant is ferrous sulfate,
Additional amount is 2.0-3.0g/L, and what additional amount unit indicated is the amount of the added chemical reagent of every liter of waste water, it is the same below on.
Optimization, the PH that hydrolysis acidification is controlled in the step 3 is 7.5-8.0.
Optimization, the partial sludge in the step 4 in a heavy pond is back to hydrolysis acidification pool, controls in hydrolysis acidification pool
Sludge quantity is the 1/4-1/3 of pool capacity.The reflux of sludge can increase sludge concentration in hydrolysis acidification pool, improve treatment effect,
Reduce the discharge amount of excess sludge simultaneously, reduce Treatment of Sludge expense.
Optimization, in the Fenton's reaction of the step 8, ferrous sulfate additional amount is 2.2-3.5g/L, hydrogen peroxide additional amount
For 3.2-6.5ml/L, the COD content that the dosage of hydrogen peroxide is discharged with flotation tank is positively correlated.Fenton's reaction can make printing and dyeing useless
The pollutants such as the chromophoric group that water contains effectively decompose, until harmless inorganic matter is converted into, so that it is de- to reach dyeing waste water
COD purpose in color, removing waste water.Its principle is：H2O2In Fe2+Catalytic action under decompose generate OH, oxidizing potential
Reach 2.8V, by oxidation operation and make its mineralising CO by approach such as electronics transfers2And H2The inorganic matters such as O.Meanwhile Fe2+Quilt
It is oxidized to Fe3+Generate coagulating sedimentation；Fenton water outlet enters sedimentation basin, is added in alkali and flocculation aid and could largely generate flock
Coagulative precipitation, so as to remove suspended matter and impurity a part of in water, so Fenton oxidation can play oxidation simultaneously and mix
Coagulate two kinds of effects.The reaction of whole system is extremely complex, and key is to pass through Fe2+Play excitation and transmitting in the reaction, makes
Chain reaction can continue to carry out until H2O2It exhausts.In addition, influence of the temperature for Fenton reagent processing waste water is complicated, temperature appropriate
Degree can activate hydroxyl radical free radical, and temperature is excessively high to make decomposing hydrogen dioxide solution Cheng Shui and oxygen.Therefore, to Fenton's reaction temperature, PH
And the state modulator of ferrous sulfate and hydrogen peroxide injected volume has a major impact the carry out degree and effect of Fenton's reaction.
Further, the hydrogen peroxide of step 8 can be added several times.Optimization, hydrogen peroxide is put into three times, three times dosage
Ratio be 3：2：1.When hydrogen peroxide disposably concentrates a large amount of launch, hydrogen peroxide can generate itself because local concentration is excessively high
It decomposes, or bumping phenomenon occurs, increase operational safety.In addition, hydrogen peroxide adds in batches, oxidation effectiveness can also be increased,
The dosage for reducing ferrous sulfate, when the dosage of ferrous sulfate increases, the coloration of water outlet can be increase accordingly.However, reacting
Initial phase it is larger to the demand of hydrogen peroxide, the trend gradually successively decreased is presented to the consumption of hydrogen peroxide in Fenton's reaction.Therefore,
The number and ratio launched by optimization, can be improved the effect of Fenton's reaction.
Further, in the step 10, the mocromembrane material of microstrainer is Kynoar, and pressure is in microstrainer
0.2MPa, temperature are 22 DEG C
Optimization, the step 1 can generate a large amount of bubbles when being aerated and stopping, and the defoaming based on polysiloxanes is added
Agent stablizing solution.
Optimization, antisludging agent chemicals dosing plant can also be added in due course in the method to each processing equipment, reduces calcium, magnesium etc.
Form foulant.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：The present invention develops a kind of high
The method of the treatment of dyeing wastewater and reuse of effect is adjusted especially suitable for the dyeing waste water of high cod values by the combination to process
And the optimization of technological parameter, COD value control can will be discharged 60 hereinafter, coloration control reaches the mark of direct emission below 32
It is quasi-；Recovery Purifying is further processed to a part water outlet simultaneously to utilize, and realizes energy-saving and emission-reduction；By to the excellent of process flow
Change, reduces the generation of the wastes such as sludge dirt；Optimize details of operation, controls operating cost and safety.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 is the flow chart for the treatment of of dyeing wastewater and reuse of the invention.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
?.
Embodiment 1
A kind of method for the treatment of of dyeing wastewater and reuse, including have the following steps：
(1) dyeing waste water that dyeing waste water concentration is 10000mg/L is introduced into conditioning tank, with sludge condensation water, pressure mud
Sewage and the mixing of each process equipment backwash recirculation water, aeration, the residence time 7.0H of waste water, adjusting PH are 9.0 or so, COD
Control is 6000-6400mg/L, and temperature is 40-45 DEG C；(2) decoloration coagulant settling tank is then introduced after waste water carry out coagulation decoloration
Sedimentation, ferrous sulfate additional amount is that 2.0g/L, PAM additional amount are 1.5mg/L, and effluent COD concentration control in coagulant precipitation pond is existed
2500-2700mg/L；(3) after the water outlet of decoloration coagulant settling tank enters hydrolysis acidification pool, the residence time is PH after 6.5 hours
7.5-8.0,30-35 DEG C of temperature；(4) water outlet enters contact-oxidation pool, and the residence time is after 20 hours, and water outlet is settled through a heavy pond
Afterwards, the control of COD concentration is in 1200-1300mg/L；The partial sludge for controlling a heavy pond is back to hydrolysis acidification pool, so that hydrolysis acid
The sludge quantity for changing pond is maintained at the 1/3 of pool capacity；(5) one sinking pool effluents enter anaerobic tower, and the residence time is 35 hours, temperature 35-
40 DEG C, PH7.5-8.0, it is 20 hours that (6), which were then discharged into the pond the MBBR residence time, then water outlet is settled by secondary settling tank afterwards；
(7) secondary clarifier effluent is handled by high-efficient shallow air flotation pond, and water outlet COD control controls 128-256 in 120-220mg/L, coloration
Times；(8) flotation tank water outlet enters Fenton's reaction tower, and ferrous sulfate additional amount is 2.2g/L, hydrogen peroxide additional amount is 3.2ml/L,
PH value 3.5 is adjusted with sulfuric acid, reaction temperature controls 30-35 DEG C, stops 2 hours；(9) Fenton's reaction tower water outlet is divided into two
Point, the additional amount of a portion NaOH is that the additional amount of 0.5g/L, PAM are 1.0mg/L, it is precipitated into 1# coagulative precipitation tank,
COD control is discharged in 60mg/L, 32 times of coloration, pH value 7.0-8.5, direct emission after disinfection；The additional amount of another part NaOH
Additional amount for 0.8g/L, PAM is that 1.0mg/L enters 2# coagulative precipitation tank precipitating；(10) water outlet of 2# coagulative precipitation tank enters micro-
Filter, which removes small wadding body, must filter out recycle-water, and the mocromembrane material of microstrainer is Kynoar, and pressure is in microstrainer
0.2MPa, temperature are 22 DEG C, filter out COD 55mg/L, 11 times of the coloration, pH value 10.0-10.5, iron ion content of recycle-water<
0.1mg/L；After disinfection, with dyeing acid section tune pH value 7.5-8.5, mixes to send to pre-treatment with tap water and boil drift hot wash process and dye
Color colour developing machine washing step uses.
As a comparison, in another embodiment, in step 8, hydrogen peroxide secondary addition in three batches, dosage accounts for always three times
The successively ratio of dosage is 3：2：1, remaining step is identical as the present embodiment, and water outlet COD is in 55mg/L, 9 times of coloration, PH
Value 7.0-8.5；Filter out recycle-water COD 50mg/L, 8 times of coloration.
Embodiment 2
A kind of method for the treatment of of dyeing wastewater and reuse, including have the following steps：
(1) by COD concentration be 13000mg/L dyeing waste water be introduced into conditioning tank, with sludge condensation water, pressure dirt water and
Each process equipment backwashes recirculation water mixing, aeration, and the residence time 10H of waste water, adjusting PH is that 9.5 or so, COD control is
7100-7500mg/L, temperature are 42-48 DEG C；(2) then waste water introduces decoloration coagulant settling tank and carries out coagulation decoloration sedimentation, sulphur
It is 3.0mg/L that sour ferrous iron additional amount, which is 3.0g/L, PAM additional amount, and coagulant precipitation pond effluent COD concentration is controlled in 3200-
3500mg/L；(3) water outlet of decoloration coagulant settling tank enters hydrolysis acidification pool, and the residence time is PH7.5-8.0 after 9.0 hours, temperature
30-35 DEG C of degree；(4) subsequently into contact-oxidation pool, the residence time is 24 hours, and water outlet is settled through a heavy pond, the control of COD concentration
In 1600-1800mg/L；The partial sludge for controlling a heavy pond is back to hydrolysis acidification pool, so that the sludge quantity of hydrolysis acidification pool is protected
It holds the 1/3 of pool capacity；(5) one sinking pool effluents enter anaerobic tower, and the residence time is 40 hours, and 35-40 DEG C of temperature, PH 7.5-
8.0；(6) being then discharged into the pond the MBBR residence time is 24 hours, then is discharged afterwards by secondary settling tank sedimentation；(7) secondary settling tank goes out
Water is handled by high-efficient shallow air flotation pond, and water outlet COD control controls 128-256 times in 300-400mg/L, coloration；(8) flotation tank
Processing water outlet enters Fenton's reaction tower, and ferrous sulfate additional amount is 3.5g/L, hydrogen peroxide additional amount is 6.5ml/L, dioxygen moisture
Three batches are added, and it is 3 that dosage, which accounts for the successively ratio of total dosage, three times：2：1；PH value 3.0, reaction temperature control are adjusted with sulfuric acid
It 35-40 DEG C processed, stops 2 hours；(9) Fenton's reaction tower water outlet is divided into two parts, and the additional amount of a portion NaOH is
The additional amount of 0.7g/L, PAM are 1.0mg/L, are precipitated into 1# coagulative precipitation tank, and water outlet COD control is in 56mg/L, coloration 11
Again, pH value 7.0-8.5, direct emission after disinfection；The additional amount of another part NaOH is that the additional amount of 1.1g/L, PAM are
1.0mg/L enters 2# coagulative precipitation tank precipitating；(10) water outlet of 2# coagulative precipitation tank enters the small wadding body of microstrainer removing and must filter out
Recycle-water, the mocromembrane material of microstrainer are Kynoar, and pressure is 0.2MPa in microstrainer, and temperature is 22 DEG C, filter out reuse
COD 51mg/L of water, 8 times of coloration, pH value 10.0-10.5, iron ion content<0.1mg/L；After disinfection, with dyeing acid section tune PH
Value 7.5-8.5 is mixed to send to pre-treatment with tap water and is boiled drift hot wash process and dyeing colour developing machine washing step use.
As a comparison, in another embodiment, in step 8, hydrogen peroxide secondary addition in three batches, dosage accounts for always three times
The successively ratio of dosage is 1：1：1, remaining step is identical as the present embodiment, water outlet COD be 59mg/L, 16 times of coloration,
PH value 7.0-8.5；Filter out recycle-water COD55mg/L, 12 times of coloration.
Embodiment 3
A kind of method for the treatment of of dyeing wastewater and reuse, including have the following steps：
(1) dyeing waste water that dyeing waste water concentration is 12000mg/L is introduced into conditioning tank, with sludge condensation water, pressure mud
Sewage and the mixing of each process equipment backwash recirculation water, aeration, the residence time 9.0H of waste water, adjusting PH are 9.0-10, COD control
It is made as 6700-7100mg/L, temperature is 40-47 DEG C；(2) decoloration coagulant settling tank then is introduced after waste water, ferrous sulfate is added
2.8g/L, the sedimentation of PAM 2.5mg/L coagulation decoloration, coagulant precipitation pond effluent COD concentration is controlled in 2900-3200mg/L；(3)
Decoloration coagulant settling tank water outlet enter hydrolysis acidification pool after, the residence time be 8.5 hours after, PH7.5-8.0,30-35 DEG C of temperature；
(4) water outlet enters contact-oxidation pool, and the residence time is after 23 hours, and after a heavy pond sedimentation, the control of COD concentration exists for water outlet
1400-1600mg/L；The partial sludge for controlling a heavy pond is back to hydrolysis acidification pool, so that the sludge quantity of hydrolysis acidification pool is kept
The 1/3 of pool capacity；(5) one sinking pool effluents enter anaerobic tower, and the residence time is 39 hours, and 35-40 DEG C of temperature, PH 7.5-8.0,
(6) being then discharged into the pond the MBBR residence time is 23 hours, then is discharged afterwards by secondary settling tank sedimentation；(7) secondary clarifier effluent passes through
The processing of high-efficient shallow air flotation pond is crossed, water outlet COD control controls 128-256 times in 220-310mg/L, coloration；(3) flotation tank is handled
Water outlet enters Fenton's reaction tower, and ferrous sulfate 2.9g/L, hydrogen peroxide 5.2ml/L is added, and hydrogen peroxide secondary addition in three batches is thrown three times
The successively ratio that dosage accounts for total dosage is 3：2：1；, pH value 3.5 is adjusted with sulfuric acid, reaction temperature controls 40-45 DEG C, stops 2
Hour；(9) water outlet of Fenton's reaction tower is divided into two parts, and the additional amount of a portion NaOH is the additional amount of 0.6g/L, PAM
It for 1.0mg/L, is precipitated into 1# coagulative precipitation tank, water outlet COD control is in 56mg/L, 10 times of coloration, pH value 7.0-8.5, disinfection
Direct emission afterwards；The additional amount of another part NaOH is that the additional amount of 1.0g/L, PAM are that 1.0mg/L enters 2# coagulative precipitation tank
Precipitating；(10) water outlet of 2# coagulative precipitation tank enters the small wadding body of microstrainer removing and obtains filtering out recycle-water, the mocromembrane material of microstrainer
Material is Kynoar, and pressure is 0.2MPa in microstrainer, and temperature is 22 DEG C, filter out the COD50mg/L of recycle-water, 8 times of coloration,
PH value 10.0-10.5, iron ion content<0.1mg/L；After disinfection, with dyeing acid section tune pH value 7.5-8.5, mixed with tap water
It send to pre-treatment and boils drift hot wash process and dyeing colour developing machine washing step use.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (10)
1. a kind of method for the treatment of of dyeing wastewater and reuse, which is characterized in that include the following steps：
(1) dyeing waste water aeration stops, and adjusts PH；(2) decoloration coagulant settles；(3) hydrolysis acidification；(4) catalytic oxidation；(5) detest
Oxygen processing；(6) MBBR film process；(7) high-efficient shallow air flotation；(8) Fenton's reaction；(9) neutralization precipitation；(10) micro-filtration is handled, and is adjusted
It is recycled after section PH.
2. a kind of method for the treatment of of dyeing wastewater and reuse according to claim 1, which is characterized in that each step is such as
Under：
(1) dyeing waste water is aerated residence time 6-10 hour in conditioning tank, and adjusting PH is 9-10.5, preliminary to reduce water outlet COD；
(2) conditioning tank water outlet introduces decoloration coagulant settling tank, and coagulant is added and flocculation aid is settled, further decreases water quality
COD concentration；
(3) after the water outlet of decoloration coagulant settling tank enters hydrolysis acidification pool, the residence time is to control PH 7.5-8.0 after 6-9 hours；
(4) hydrolysis acidification pool water outlet enters contact-oxidation pool, and the residence time is after 20-24 hours, and water outlet is settled through a heavy pond；
(5) one sinking pool effluents enter anaerobic tower, and the residence time is 35-40 hours；
(6) it is 20-24 hours that anaerobic tower, which was discharged into the pond the MBBR residence time, and then water outlet is by secondary settling tank sedimentation；
(7) secondary clarifier effluent enters the processing of high-efficient shallow air flotation pond；
(8) flotation tank water outlet enters Fenton's reaction tower, and ferrous sulfate is added and hydrogen peroxide is reacted, being adjusted with acid pH value is
3.0-4.0, reaction temperature control 30-45 DEG C, stop 2 hours；
(9) water outlet enters sedimentation basin, and alkali and flocculation aid neutralization precipitation, direct emission after a part disinfection is added；Another part into
Enter microstrainer；
(10) water outlet enters the small wadding body of microstrainer filtering, and after disinfection, adjusting PH with dyeing acid is 7.5-8.5, mixed with tap water
It closes to send to pre-treatment and boils drift hot wash process and dyeing colour developing machine washing step use.
3. a kind of method for the treatment of of dyeing wastewater and reuse according to claim 2, which is characterized in that in the step 9
The alkali of addition is NaOH, flocculation aid PAM；Wherein, the injected volume of NaOH is 0.5-0.7g/L, control in the water body of direct emission
PH is 7.0-8.5；Injected volume into the water body NaOH of microstrainer is 0.8-1.1g/L, and control PH is 10-10.5.
4. a kind of method for the treatment of of dyeing wastewater and reuse according to claim 2, which is characterized in that in the step 9,
The water of direct emission accounts for the half of Fenton's reaction tower water yield.
5. a kind of method for the treatment of of dyeing wastewater and recycling according to claim 2, which is characterized in that the step
Partial sludge in 4 in a heavy pond is back to hydrolysis acidification pool, and the sludge quantity for controlling hydrolysis acidification pool is the 1/4-1/3 of pool capacity.
6. a kind of method for the treatment of of dyeing wastewater and reuse according to claim 2, which is characterized in that in the step 2
Flocculation aid be PAM, additional amount 1.5-3.0mg/L, coagulant is ferrous sulfate, additional amount 2.0-3.0g/L.
7. a kind of method for the treatment of of dyeing wastewater and reuse according to claim 2, which is characterized in that in the step 3
The PH for controlling hydrolysis acidification is 7.5-8.0.
8. a kind of method for the treatment of of dyeing wastewater and reuse according to claim 2, which is characterized in that the step 8
In Fenton's reaction, ferrous sulfate additional amount is 2.2-3.5g/L, hydrogen peroxide additional amount is 3.2-6.5ml/L, and hydrogen peroxide adds
The COD content being discharged with flotation tank is measured to be positively correlated.
9. a kind of method for the treatment of of dyeing wastewater and reuse according to claim 8, which is characterized in that the step 8
In Fenton's reaction, the multiple batches of addition of dioxygen moisture.
10. a kind of method for the treatment of of dyeing wastewater and reuse according to claim 9, which is characterized in that the step 8
In Fenton's reaction, hydrogen peroxide is added in three times, and successively ratio is 3 to dosage three times：2：1.
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