CN107200389A - A kind of dyeing waste water advanced treating integral process of oxidization time in seconds - Google Patents

A kind of dyeing waste water advanced treating integral process of oxidization time in seconds Download PDF

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Publication number
CN107200389A
CN107200389A CN201710505995.0A CN201710505995A CN107200389A CN 107200389 A CN107200389 A CN 107200389A CN 201710505995 A CN201710505995 A CN 201710505995A CN 107200389 A CN107200389 A CN 107200389A
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water
fenton
pipeline
waste water
reaction
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CN201710505995.0A
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CN107200389B (en
Inventor
刘燕
陈云路
成韵沁
聂建欣
卢俊成
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Fudan University
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Fudan University
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56Macromolecular compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/722Oxidation by peroxides
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/30Nature of the water, waste water, sewage or sludge to be treated from the textile industry
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00Apparatus for treatment of water, waste water or sewage
    • C02F2201/002Construction details of the apparatus
    • C02F2201/007Modular design
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00Use of specific compounds during water treatment
    • C02F2305/02Specific form of oxidant
    • C02F2305/026Fenton's reagent

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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)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

The invention provides integrated Fenton reactor designed based on a kind of experiment by quick Fenton's reaction.The present invention have studied degradation effect of the Fenton's reaction to part of fuel under the conditions of being sufficiently mixed, and propose the system that dyeing waste water bio-chemical effluent is handled to fast deep first by residence spectrum instrument.The system is added into Fenton reagent by pipe-line mixer in two stage treatment technique secondary clarifier effluent pipeline, using the strong mixed effect of pipe-line mixer, mass transfer enhancement effect, to just realize being sufficiently mixed and reacting complete for Fenton medicament in the duct.And alkali lye is added in pipe end, pH is adjusted, and PAM is added, coagulating sedimentation is carried out, then discharged.The advanced treatment system, substantially reduces the time needed for traditional Fenton processing waster water process, and also eliminate it is cumbersome add pond body, saved construction cost and operation cost.

Description

A kind of dyeing waste water advanced treating integral process of oxidization time in seconds
Technical field
The invention belongs to technical field of sewage, and in particular to a kind of dyeing waste water depth of oxidization time in seconds Manage integral process.
Background technology
Fenton's reaction is a kind of advanced oxidation reaction being widely known by the people, and has also had all in the processing containing organic wastewater Many applications.Fenton's reaction mainly make use of Fe2+Ion in acid condition with H2O2Solution is contacted, and can react generation substantial amounts of Reactive hydroxyl radical HO, and then oxidation Decomposition organic substance.Hydroxyl radical free radical has very high oxidation-reduction potential (2.80eV), therefore can also have good removal effect for the organic matter of some difficult degradations in water body.The principle of Fenton's reaction Shown in following reaction equation:
Fe2++H2O2→HO·+Fe3++OH-
RH+HO·→H2O+R·
And Fe3+Ion can also regenerate ferrous ion by further reacting:
Fe3++H2O2→Fe-OOH2++H+
Fe-OOH2+→HO2·+Fe2+
By experimental studies have found that, Fenton's reaction in the case where being sufficiently mixed, can complete in a short period of time reaction. In the quick Fenton's reaction by reaction substrate of methylene blue test result indicates that, in 30s or so Fenton's reactions to methylene blue Removal effect be basically completed.Fenton advanced treating side of the experimental result to oxidization time proposed by the present invention in seconds Method provides theoretical foundation.
Under the present situation that current dyeing standard of drainage is improved constantly, the draining of many sewage treatment plants can not be met New standard, thus carry mark transformation seem particularly urgent.Fenton process is as advanced oxidation processes, to the high treating effect of organic matter, Cost is cheap, and reagent does not have toxicity in use, and generation product does not have overt toxicity yet, therefore to waste water Advanced treating technique in be popular.But traditional Fenton technology still need build pond body carry out multi-step dosing and Sludge is removed, it is necessary to new space and construction period.
The content of the invention
It is an object of the invention to provide a kind of dyeing waste water advanced treating integral process of oxidization time in seconds, sheet Invention devises that a kind of mass-transfer efficiency is high, and reaction speed is fast and the Fenton reactor of oxidization time of high treating effect in seconds, Coordinate coagulating sedimentation, the advanced treating applied to dyeing waste water.
The dyeing waste water advanced treatment process of the quick Fenton process of the oxidization time of the present invention in seconds is anti-with quick Fenton Based on should testing, and influence of the mass transfer to reaction effect of having analyzed and researched, using water sprayer as dosing method, quick mixing Pharmacy response and processing water body, pH terminating reactions are adjusted in delivery port, neutralize water outlet, and add at flocculant progress coagulating sedimentation Reason, improves effluent quality.
A kind of dyeing waste water advanced treating integral process of oxidization time proposed by the present invention in seconds, specific steps are such as Under:
(1) pending waste water is pumped into pipeline with pump first, pending wastewater flow is 1000- in control pipeline 3000m3/ h, to meet daily at least 20000 tons sewage load;
(2) first water sprayer is accessed in pipeline front end, adds the Fe of the acidifying prepared in advance2SO4Solution, control Fe2SO4The pH value of solution is 0.5~1.5;After being sufficiently mixed, the pH value in control waste water is less than 4;First water sprayer of control is thrown HCl dropwise Fe2SO4The speed of solution is 1~5m3Ferrous sulfate concentration is 400-800mg/L in/h, waste water;
(3) in step (2), pipeline accesses second water sprayer again afterwards, and for adding hydrogen peroxide solution, control hydrogen peroxide is dense Spend for 25%~50%, second water sprayer adds dioxygen water speed for 1~5m3/ h, it is ensured that hydrogen peroxide dosage be 100~ 250mg/L, it is the 100%~200% of COD to add equivalent, to ensure that effluent quality is up to standard;The quality of ferrous sulfate and hydrogen peroxide Add than for 4:1~8:1;
(4) enough duct lengths are provided afterwards in step (3), control pipeline length is 50~100m, it is allowed to which water body is in pipe 30~60s can be flowed in road, it is ensured that Fenton's reaction is abundant;
(5) in step (4), pipeline accesses the 3rd water sprayer afterwards, for adding sodium hydroxide solution, for terminating reaction, And promote iron ion to play coagulating sedimentation effect;It is 20%~40% to control concentration of sodium hydroxide solution, and the 3rd water sprayer is thrown It is 1~5m to be hydrogenated with sodium hydroxide solution speed3Water pH value is 7~9 after/h, hydrogenation sodium hydroxide solution;
(6) PAM solution is added by the 4th water sprayer before step (5) afterwards pipe drainage mouthful, PAM solution concentrations are 8%~10%, the 4th water sprayer dispensing speed is 1~5m3/h;PAM adds rear concentration for 3~7ppm.
In the present invention, the caliber DN of pipeline described in step (1) is 1000-2000mm.
In the present invention, described in step (2) control waste water in pH value be less than 4, specially the pH value of water body be 2.5~ 3.5。
The present invention has following outstanding feature and beneficial effect:
(1) the new Fenton reactor substantially reduces the time that Fenton's reaction handles dyeing waste water, changes tradition right With the application mode of Fenton's reaction.According to experimental result, in the case of pipeline mixing sufficiently, Fenton's reaction can be complete in 30s Into.Under conditions of being sufficiently mixed of Fenton medicament and dyeing waste water, reaction can be just basically completed in one minute.Need not Again as the reaction time in traditional handicraft using 20 to four ten minutes, hydraulic detention time is substantially reduced
(2) the new Fenton reactor greatly reduces occupation of land face of traditional Fenton reactor in actual application Product.In traditional Fenton reactor, multiple regulating reservoirs and dosing pond are generally required;In this reactor, pass through pipeline dosing Device, eliminates acidification pool, dosing pond need to only arrange that a coagulative precipitation tank can complete processing after water outlet, be conducive to simultaneously Transformed for the mark that carries for being completed waste water treatment plant.
Brief description of the drawings
Fig. 1 is process chart of the invention.
The dyeing waste water advanced treating integral process of oxidization time of the present invention in seconds, including enter liquid zone, offer medicine area I, Reaction zone, offer medicine area II, subsequent treatment area.
It is dispensing area I near water inlet goes out, for adding Fenton examination by staying water by being pumped into pipeline Agent.Ferrous iron solution is added first, then adds hydrogen peroxide solution, it is both acidified, to reach while adjusting inlet flow-patterm Effect.
Intermediate conduit is reaction zone.Duct length needs to ensure that water body can flow 1-2min wherein to ensure that reaction is filled Point.
It is dispensing area II near delivery port, to adjust pH value and add flocculant.In the design of the present invention, first throw Plus alkali lye, then add PAM.
Delivery port connects sedimentation basin as subsequent treatment, and reactor water outlet is the supernatant of sedimentation basin.
Fig. 2 is hydrogen peroxide and the ferrous graph of a relation for adding the clearance for comparing methylene blue.
Fig. 3 is the graph of a relation of the clearance of hydrogen peroxide dosage and methylene blue under identical ferrous dosage.
Fig. 4 is that holding is added than constant, the graph of a relation of the dosage of hydrogen peroxide and the clearance of methylene blue.
Embodiment
The present invention is further illustrated below by embodiment.
Embodiment 1
Zhejiang treatment of dyeing wastewater factory employs:Preliminary sedimentation tank+biochemistry+second pond+end Fenton (catalysis oxidation)/coagulation Depositing technology, end-o f-pipe -control employs pipeline doser, and pipeline flow is 200m3/h;Acidifying has been firstly added in pipeline opening Copperas solution, pH is 1, and concentration is that dispensing speed is 5m3/ h, then adds hydrogen peroxide, and concentration is 30%, and dispensing speed is 3m3/ h, reaction section length is about 50m, and the reaction time is about 30s.The sodium hydroxide that concentration is 30% is added after reaction end of extent Solution, adds speed for 3m3/h.The PAM that concentration is 8% is added in exit, coagulating kinetics are carried out.Factory's second pond goes out Water COD is 156 ± 3mg/L, and water outlet COD can reach 68 ± 3mg/L after present invention process end-o f-pipe -control, meet GB 4287- 2012 discharge standard.
Embodiment 2
Anhui Taihu Lake certain treatment of dyeing wastewater factory of bank employs:(the catalysis of preliminary sedimentation tank+oxidation ditch+second pond+end Fenton Oxidation)/coagulation-settlement process, end-o f-pipe -control employs pipeline doser, and pipeline flow reaches 300m3/ h, in pipeline opening first The copperas solution of acidifying is added, pH is 1.5, concentration is that dispensing speed is 5m3/ h, then adds hydrogen peroxide, and concentration is 30%, concentration is added for 150mg/L, and reaction section length is about 100m, and the reaction time is about 50s.Added after reaction end of extent dense The sodium hydroxide solution for 30% is spent, speed is added for 3m3/h.The PAM that concentration is 8% is added in exit, coagulation is carried out and sinks Shallow lake is handled.Factory secondary clarifier effluent COD is 182 ± 3mg/L, and water outlet COD can reach 75 after present invention process end-o f-pipe -control ± 3mg/L, meets GB 4287-2012 discharge standard.
Embodiment 3
Guangdong treatment of dyeing wastewater factory employs:Preliminary sedimentation tank+activated sludge process+second pond+end Fenton (catalysis oxygen Change)/coagulation-settlement process, end-o f-pipe -control employs pipeline doser, and pipeline flow reaches 250m3/ h, adds first in pipeline opening The copperas solution of acidifying is entered, pH is 1, concentration is that dispensing speed is 3m3/ h, then adds hydrogen peroxide, and concentration is 50%, Concentration is added for 150mg/L, reaction section length is about 80m, and the reaction time is about 50s.Adding concentration after reaction end of extent is 40% sodium hydroxide solution, adds speed for 2.5m3/h.The PAM that concentration is 8% is added in exit, coagulating sedimentation is carried out Processing.Factory secondary clarifier effluent COD is 167 ± 3mg/L, after present invention process end-o f-pipe -control water outlet COD can reach 72 ± 3mg/L, meets GB 4287-2012 discharge standard.
Fig. 2, Fig. 3 and Fig. 4 are the experimental result picture on quick Fenton's reaction, using methylene blue as object, progress Fenton is tested, and experiment condition is as follows:
Determine the absorbance of methylene blue at 664nm respectively using UV-detector.For the Fenton oxidation of the dyestuff Experiment, initial pH is 2.0, and primary pollutant concentration is 10mg/L, 20 DEG C of reaction temperature.Change 1) oxidant in experiment H2O2Dosage;2) oxidant H2O2Compare with adding for catalyst Fe SO47H2O, 8 groups of experiments carried out to methylene blue, As shown in table 1:
The quick Fenton oxidation experiment reaction condition of the dyestuff of table 1
Sequence number pH H2O2Dosage (mg/L) n(H2O2):n(Fe2+)
1 2.0 36 2:1
2 2.0 36 1:1
3 2.0 36 1:2
4 2.0 36 1:4
5 2.0 72 2:1
6 2.0 144 4:1
7 2.0 72 1:1
8 2.0 144 1:1
According to the 1st, 2,3,4 group of experimental result, conclusion 1 can be obtained) it is obvious that as hydrogen peroxide and ferrous iron add ratio Increase, the reaction rate of methylene blue is progressively speeded, and can reach reaction end faster.When adding than for 2:1(A) When, reaction is about completed in 20s or so, when adding than reaching 1:When more than 1 (B, C, D), reaction is about completed in 10s or so.
Conclusion 2 can be obtained according to the 2nd, 5,6 group of experimental result) when keeping ferrous dosage constant, as hydrogen peroxide is added The increase of amount, reaction rate is also speeded therewith.
According to the 2nd, 7,8 group of experimental result, conclusion 3 can be obtained) when keep add than it is constant when, with the dosage of hydrogen peroxide Increase, reaction rate also speeds therewith, and when can improve reaction end methylene blue clearance.
Iron ion (III) itself has coagulating sedimentation effect in the basic conditions in Fenton reagent, coordinates the flocculants such as PAM Good coagulating sedimentation effect can be played, the SS and COD in water can be effectively reduced, water quality is improved out.

Claims (3)

1. the dyeing waste water advanced treating integral process of a kind of oxidization time in seconds, it is characterised in that comprise the following steps that:
(1)Pending waste water is pumped into pipeline with pump first, pending wastewater flow is 1000-3000m in control pipeline3/ h, To meet daily at least 20000 tons sewage load;
(2)First water sprayer is accessed in pipeline front end, the Fe of the acidifying prepared in advance is added2SO4Solution, controls the pH of waste water It is worth for 0.5 ~ 1.5;After being sufficiently mixed, the pH value in control waste water is less than 4;First water sprayer of control adds the Fe of acidifying2SO4 The speed of solution is 1 ~ 5m3Ferrous sulfate concentration is 400-800mg/L in/h, waste water;
(3)In step(2)Pipeline accesses second water sprayer again afterwards, for adding hydrogen peroxide solution, controls the hydrogen peroxide concentration to be 25% ~ 50%, second water sprayer adds dioxygen water speed for 1 ~ 5m3/ h, it is ensured that hydrogen peroxide dosage is 100 ~ 250mg/L, is thrown Sovolin amount is the 100% ~ 200% of COD, to ensure that effluent quality is up to standard;The quality of ferrous sulfate and hydrogen peroxide is added than for 4:1~ 8:1;
(4)In step(3)Enough duct lengths are provided afterwards, and control pipeline length is 50 ~ 100m, it is allowed to which water body can in pipeline To flow 30 ~ 60s, it is ensured that Fenton's reaction is abundant;
(5)In step(4)Pipeline accesses the 3rd water sprayer afterwards, for adding sodium hydroxide solution, for terminating reaction, and promotees Enter iron ion and play coagulating sedimentation effect;It is 20% ~ 40% to control concentration of sodium hydroxide solution, and the 3rd water sprayer adds hydroxide Sodium solution speed is 1 ~ 5m3Water pH value is 7 ~ 9 after/h, hydrogenation sodium hydroxide solution;
(6)In step(5)PAM solution is added by the 4th water sprayer before pipe drainage mouthful afterwards, PAM solution concentrations are 8% ~ 10%, the 4th water sprayer dispensing speed is 1 ~ 5m3/h;PAM adds rear concentration for 3 ~ 7ppm.
2. technique according to claim 1, it is characterised in that step(1)Described in pipeline caliber DN be 1000- 2000mm。
3. technique according to claim 1, it is characterised in that step(2)Described in control waste water in pH value be less than 4, tool Body is that the pH value of water body is 2.5 ~ 3.5.
CN201710505995.0A 2017-06-28 2017-06-28 A kind of dyeing waste water advanced treating integral process of oxidization time in seconds Expired - Fee Related CN107200389B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107473453A (en) * 2017-09-30 2017-12-15 北京中晟清源环保科技有限公司 A kind of novel pure hydrostatic pipeline reactor
CN107640854A (en) * 2017-09-25 2018-01-30 复旦大学 A kind of dyeing waste water advanced treating integral method of oxidization time in seconds
CN109592813A (en) * 2017-09-30 2019-04-09 北京中晟清源环保科技有限公司 One type Fenton adds the integrated artistic method of air-float technology
CN112939279A (en) * 2021-02-06 2021-06-11 湖州光正水质净化有限公司 Method for automatically adjusting Fenton process parameters based on PH and ORP linkage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011136296A (en) * 2009-12-28 2011-07-14 Shimizu Corp Method and apparatus for decoloring colored discharge water
CN202717623U (en) * 2012-08-15 2013-02-06 天津市联合环保工程设计有限公司 Integrated Fenton reaction unit
CN105236625A (en) * 2015-11-11 2016-01-13 苏州市环境保护有限公司 Fenton printing-dyeing-wastewater deep treatment method
CN206014551U (en) * 2016-08-15 2017-03-15 浙江省环境工程有限公司 Convergent improvement type Fenton catalytic oxidation treatment system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011136296A (en) * 2009-12-28 2011-07-14 Shimizu Corp Method and apparatus for decoloring colored discharge water
CN202717623U (en) * 2012-08-15 2013-02-06 天津市联合环保工程设计有限公司 Integrated Fenton reaction unit
CN105236625A (en) * 2015-11-11 2016-01-13 苏州市环境保护有限公司 Fenton printing-dyeing-wastewater deep treatment method
CN206014551U (en) * 2016-08-15 2017-03-15 浙江省环境工程有限公司 Convergent improvement type Fenton catalytic oxidation treatment system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107640854A (en) * 2017-09-25 2018-01-30 复旦大学 A kind of dyeing waste water advanced treating integral method of oxidization time in seconds
CN107473453A (en) * 2017-09-30 2017-12-15 北京中晟清源环保科技有限公司 A kind of novel pure hydrostatic pipeline reactor
CN109592813A (en) * 2017-09-30 2019-04-09 北京中晟清源环保科技有限公司 One type Fenton adds the integrated artistic method of air-float technology
CN112939279A (en) * 2021-02-06 2021-06-11 湖州光正水质净化有限公司 Method for automatically adjusting Fenton process parameters based on PH and ORP linkage
CN112939279B (en) * 2021-02-06 2022-10-21 湖州光正水质净化有限公司 Method for automatically adjusting Fenton process parameters based on PH and ORP linkage

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