CN103570165A - Process for treating printing and dyeing wastewater through combination method - Google Patents
Process for treating printing and dyeing wastewater through combination method Download PDFInfo
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- CN103570165A CN103570165A CN201210271454.3A CN201210271454A CN103570165A CN 103570165 A CN103570165 A CN 103570165A CN 201210271454 A CN201210271454 A CN 201210271454A CN 103570165 A CN103570165 A CN 103570165A
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Abstract
The invention relates to a process for treating printing and dyeing wastewater through a combination method. The process comprises a pretreatment process and a combined treatment process, wherein the pretreatment process comprises the following steps: regulating an aeration process and a neutralization, coagulation and precipitation process, performing pretreatment of aeration regulation and neutralization, coagulation and precipitation on wastewater, and performing combined treatment through microwave+photoelectrocatalysis+industrial waste residue filtration and adsorption. According to the process, degradation-resistant organic matters and other pollutants in the printing and dyeing wastewater can be effectively degraded, a wastewater treatment effect is improved, and the treated wastewater can basically meet the reutilization requirement. According to the process, related problems (particularly complex pollutant components, low biodegradability and high discoloring difficulty of the mixed printing and dyeing wastewater in a concentrated industrial park) for treatment of the printing and dyeing wastewater are effectively solved, a high-efficiency treatment process is provided, the treatment effect is stable, the production operating cost is low, and the operation is simple and convenient.
Description
Technical field
The invention belongs to water treatment field, specifically, relate to a kind of combined method treatment of dyeing and printing technique.
Background technology
China is world textile printing and dyeing industry the first big country, and textile printing and dyeing industry is industrial wastewater discharge rich and influential family, accounts for 35% of whole discharged volume of industrial waste water.According to incompletely statistics, the every processing 100m of printing and dyeing mill fabric, can produce 3～5t waste water.Dyeing waste water, due to the slurry using in the entrainment that contains fibrous material itself and the course of processing, finish, dyestuff and chemical assistant etc., has become the maximum important source of pollution that are difficult to improvement of harm.Along with the development towards anti-oxidant, anti-photochemical, antibiosis direction of the chemical property of modern dyestuff, auxiliary agent, make the improvement of dyeing waste water more complicated.At present, the conventional combination that has physicochemical treatment method, method of chemical treatment, biological treatment and these 3 kinds of methods for the treatment of method of printing and dying wastewater.Physicochemical treatment method has: absorption method, membrane separation process.Method of chemical treatment has: Coagulation Method, oxidation style.Biological treatment has: aerobic treatment method, anaerobic treatment method, anaerobism---aerobic combination treatment method, efficient degrading bacteria method.These methods are used seldom separately, general several method combined utilization.Coagulation Method is to make at present one of most economical, effective means of decoloring dye waste water.Conventional coagulating agent has low-molecular inorganic coagulating agent, inorganic polymer coagulant, organic polymer coagulating agent and microbial flocculant etc.In recent years, a large amount of experimental studies shows that the coagulation effect of inorganic polymer coagulant is generally better than traditional molysite and aluminum salt, is widely used in treatment of dyeing wastewater.Meanwhile, particularly the high-molecular coagulant adopting application of synthetic is also increasingly extensive for organic coagulating agent.But Coagulation Method exists added amount of chemical large, and cost is higher, the problem such as the solid waste of generation is more.
The present invention provides a kind for the treatment of process of dyeing waste water for the problems referred to above, the method technique is simple, good decolorizing effect, COD clearance are higher, process the mud and the residue that in waste water process, produce and can fully utilize as material of construction, the waste water energy after processing reaches the requirement of recycling.
Summary of the invention
A treatment of dyeing and printing technique, it comprises pretreatment technology and combined treatment process.Pretreatment stage comprise regulate aeration flow process and in and coagulating sedimentation flow process, waste water is after pre-treatment, enter again microwave+photoelectrocatalysis+industrial residue Filtration Adsorption and carry out combined treatment, the pollutents such as hardly degraded organic substance that this technique can be degraded in dyeing waste water effectively, the treatment effect that improves waste water, the waste water after processing can meet the requirement of recycling substantially.
Pretreatment technology comprise regulate aeration flow process and in and coagulating sedimentation flow process, regulate aeration flow process to adopt oxygenic aeration pond, aeration intensity 2-4m is controlled in aeration tank
3/m
2.h, so that all types of industries waste water and dyeing waste water fully all with; In and coagulating sedimentation flow process adopt in and coagulative precipitation tank, at neutral zone, adopt metering valve to add sheet alkali and regulate pH value, control pH value is 8～10, the follow-up 0.5%PAC of adding carries out coagulation, adds in addition the organic discoloring agent dosage of positively charged ion 3-6mg/L.The organic discoloring agent of positively charged ion is dimethyl diallyl ammonium chloride polymkeric substance (PD M D AA C), and the follow-up concentration that adds is that 0.5% PAC carries out coagulation, and adding in addition the organic discoloring agent of positively charged ion and dosage is 3～6mg/L; By pretreatment technology, can remove macrobead suspended substance and the partial organic substances in dyeing waste water.
Combined method treatment process is to carry out combined treatment by microwave+photoelectrocatalysis+industrial residue Filtration Adsorption.Combined treatment process is divided into three main phase:
1, microwave induced strain: induce intensive treatment through microwave induced pond at this stage wastewater streams.Its microwave reinforced inducing action mechanism is: when dyeing waste water is placed in microwave field, high frequency microwave electromagnetic field makes the polar molecule high-speed rotary in liquid phase then produces heat effect, thereby change the thermodynamics enthalpy of system, also reduce the activation energy of reaction and the chemical bond strength of molecule simultaneously.Microwave action produces on the one hand heat effect and non-thermal effect have been strengthened the oxidation of living radical OH to hardly degraded organic substance in waste water greatly, and make its solvability and can change by catalytic performance; Solid phase particle in liquid-phase system can converge rapidly settlement separate in microwave field on the other hand.Waste water microwave radiation 1min, microwave irradiation power is 1.2kw.
2, the photoelectrocatalysis stage: waste water enters photo electrocatalysis reactor through microwave induced intensive treatment is laggard.This stage adopts the collaborative method of electrolysis-photochemical catalytic oxidation, uses TiO
2film optoelectronic pole applies anode bias-voltage between positive and negative electrode, and the electronics that photic catalyzer is produced more easily leaves TiO
2film optoelectronic pole surface, reduces burying in oblivion of electronics and hole, improves TiO
2photochemical catalysis quantum yield, can reduce in a large number catalyst recovery process.Current density 40mA/cm
2, luminous range is 4～8cm, photoelectrocatalysis reaction times 0.5～1.5h.Meanwhile utilize semiconductor material photocatalyst, under UV photoirradiation, produce electronics---hole pair, generate the high mars free radical OH with oxidation capacity, initiated oxidation reduction reaction, accelerates organic degraded in waste water, non-secondary pollution.In electrolysis, photochemical catalysis, three kinds of modes of photoelectrocatalysis act synergistically waste water from dyestuff in the process of COD, in photoelectrocatalysioxidization oxidization process, the removal speed of COD will be higher than Photocatalytic Oxidation and electrolysis and degradation process, this is because after the electronics and hole that produce in photocatalytic process, the recombination probability in electronics and hole is higher, and in photoelectrocatalysis, be added to TiO
2/ Ti thin film positive pole bias-voltage can form directed electric field, moves away light induced electron, reduces electronics---and hole-recombination probability, improves the productive rate of OH, and then has accelerated organic degradation rate.In addition, UV rayed produces promoter action to electrochemical oxidation, and the ionogen NaCl adding in electrolytic reaction process can produce HClO in anode electrolysis reaction, and it can be decomposed into Cl and OH after absorbing ultraviolet energy, accelerates organic degradation rate.From the effect of actual use, in photoelectrocatalysioxidization oxidization degradation process, there is good photoelectric-synergetic effect.
Waste water after microwave treatment passes through photochemical catalytic oxidation and electrochemical process associated treatment again, the effect of this combined treatment process can be carbonic acid gas, water and simple organic by the contaminant degradation in dyeing waste water, and has advantages of under normal temperature and pressure and react.The effect of microwave induced processing is to improve and strengthen the efficiency that the subsequent optical electrocatalysis of waste water is processed, and is conducive to follow-up photoelectrocatalysis and processes.Microwave induced intensive treatment is a kind of senior inductive technology, it is that hardly degraded organic substance based in dyeing waste water etc. has very strong receptivity to microwave, there is strong effect and make some surface point position quickly heat up to very high temperature in the some potential energy on its surface and microwave, can decompose being adsorbed onto these some positions and near organism high temperature mineralising, thereby there are fast processing Persistent organic pollutants, simultaneously, polarizable medium makes molecular motion by the rotation of ion migration and polar molecule under microwave action, the molecule that is applied material was transformed into dynamically from relatively static moment, high-speed rotary transfers to produce interior heating effect.
In addition microwave induced interaction energy reduces chemical reaction activation energy, changes the dynamic performance of chemical reaction, is therefore very beneficial for follow-up electrolysis---the carrying out of light-catalyzed reaction, and to photoelectrocatalysis, effect has stronger collaborative and strengthening effect.
3, waste water filtering absorption phase: the zeolite of employing industrial waste and slag are as sorbing material, the waste water of previous processed is entered to industrial residue again to be filtered and adsorption treatment, further waste water is carried out to advanced treatment, the waste water after processing can meet the requirement of recycling.
The present invention has designed the combination treatment method of multiple processing means and technique first, disposable dispensing, dosage solid waste few, that produce is less, technique is simple, COD clearance is higher, good decolorizing effect, be applicable to the processing of various dyeing waste waters, and the waste water energy after processing reaches the requirement of waste water recycling.Particularly the waste water from dyestuff higher to influent density (starting point concentration is CODcr2000～3000mglL, 200～1000 times of colourities) processed, and can obtain comparatively ideal effect.
Accompanying drawing explanation
Accompanying drawing is a kind of combined method treatment of dyeing and printing process flow sheet of the present invention.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention
See above and state treatment process and can be further processed waste water, not only can accomplish qualified discharge, and can direct reuse.
Data before and after wastewater treatment please see the following form:
| Project | Water inlet index (mg/l) | Effluent index (mg/l) |
| COD Cr | ≤1500 | ≤50 |
| Colourity | ≤500 | ≤5 |
Certainly, those skilled in the art in the art will be appreciated that, above-described embodiment is only for the present invention is described, and not as limitation of the invention, as long as within the scope of connotation of the present invention, the conversion of above-described embodiment, modification all will be dropped in the scope of the claims in the present invention.
Claims (7)
1. a combined method treatment of dyeing and printing technique, is characterized in that, it comprises pretreatment technology and combined method treatment process; Described pretreatment technology comprise regulate aeration flow process and in and coagulating sedimentation flow process, regulate aeration flow process to adopt oxygenic aeration pond, aeration intensity 2-4m is controlled in aeration tank
3/m
2.h, so that all types of industries waste water and dyeing waste water fully all with; In and coagulating sedimentation flow process adopt in and coagulative precipitation tank, at neutral zone, adopt metering valve to add sheet alkali and regulate pH value, controlling pH value is 8～10, and the follow-up concentration that adds is that 0.5% PAC carries out coagulation, and adding in addition the organic discoloring agent of positively charged ion and dosage is 3～6mg/L; By pretreatment technology, can remove macrobead suspended substance and the partial organic substances in dyeing waste water.
Described combined method treatment process is to carry out combined treatment by microwave+photoelectrocatalysis+industrial residue Filtration Adsorption.Combined treatment process is divided into three main phase:
(1) microwave induced strain: induce intensive treatment through microwave induced pond at this stage wastewater streams.Its microwave reinforced inducing action mechanism is: when dyeing waste water is placed in microwave field, high frequency microwave electromagnetic field makes the polar molecule high-speed rotary in liquid phase then produces heat effect, thereby change the thermodynamics enthalpy of system, also reduce the activation energy of reaction and the chemical bond strength of molecule simultaneously.Microwave action produces on the one hand heat effect and non-thermal effect have been strengthened the oxidation of living radical OH to hardly degraded organic substance in waste water greatly, and make its solvability and can change by catalytic performance; Solid phase particle in liquid-phase system can converge rapidly settlement separate in microwave field on the other hand.
(2) the photoelectrocatalysis stage: waste water enters photo electrocatalysis reactor through microwave induced intensive treatment is laggard.This stage adopts the collaborative method of electrolysis-photochemical catalytic oxidation, uses TiO
2film optoelectronic pole applies anode bias-voltage between positive and negative electrode, and the electronics that photic catalyzer is produced more easily leaves TiO
2film optoelectronic pole surface, reduces burying in oblivion of electronics and hole, improves TiO
2photochemical catalysis quantum yield, can reduce in a large number catalyst recovery process.Meanwhile utilize semiconductor material photocatalyst, under UV photoirradiation, produce electronics---hole pair, generate the high mars free radical OH with oxidation capacity, initiated oxidation reduction reaction, accelerates organic degraded in waste water, non-secondary pollution.In electrolysis, photochemical catalysis, three kinds of modes of photoelectrocatalysis act synergistically waste water from dyestuff in the process of COD, in photoelectrocatalysioxidization oxidization process, the removal speed of COD will be higher than Photocatalytic Oxidation and electrolysis and degradation process, this is because after the electronics and hole that produce in photocatalytic process, the recombination probability in electronics and hole is higher, and in photoelectrocatalysis, be added to TiO
2/ Ti thin film positive pole bias-voltage can form directed electric field, moves away light induced electron, reduces electronics---and hole-recombination probability, improves the productive rate of OH, and then has accelerated organic degradation rate.In addition, UV rayed produces promoter action to electrochemical oxidation, and the ionogen NaCl adding in electrolytic reaction process can produce HClO in anode electrolysis reaction, and it can be decomposed into Cl and OH after absorbing ultraviolet energy, accelerates organic degradation rate.From the effect of actual use, in photoelectrocatalysioxidization oxidization degradation process, there is good photoelectric-synergetic effect.
Waste water after microwave treatment passes through photochemical catalytic oxidation and electrochemical process associated treatment again, the effect of this combined treatment process can be carbonic acid gas, water and simple organic by the contaminant degradation in dyeing waste water, and has advantages of under normal temperature and pressure and react.The effect of microwave induced processing is to improve and strengthen the efficiency that the subsequent optical electrocatalysis of waste water is processed, and is conducive to follow-up photoelectrocatalysis and processes.Microwave induced intensive treatment is a kind of senior inductive technology, it is that hardly degraded organic substance based in dyeing waste water etc. has very strong receptivity to microwave, there is strong effect and make some surface point position quickly heat up to very high temperature in the some potential energy on its surface and microwave, can decompose being adsorbed onto these some positions and near organism high temperature mineralising, thereby there are fast processing Persistent organic pollutants, simultaneously, polarizable medium makes molecular motion by the rotation of ion migration and polar molecule under microwave action, the molecule that is applied material was transformed into dynamically from relatively static moment, high-speed rotary transfers to produce interior heating effect.
In addition microwave induced interaction energy reduces chemical reaction activation energy, changes the dynamic performance of chemical reaction, is therefore very beneficial for follow-up electrolysis---the carrying out of light-catalyzed reaction, and to photoelectrocatalysis, effect has stronger collaborative and strengthening effect.
(3) waste water filtering absorption phase: the waste water through previous processed enters industrial residue filtration and adsorption treatment again, further waste water is carried out to advanced treatment, and the waste water after processing can meet the requirement of recycling.
2. method according to claim 1, its pre-treatment feature is: in wastewater equalization pond, aeration flow process adopts oxygenic aeration pond, aeration intensity 2～4m is controlled in aeration tank
3/ m
2h.
3. according to the method described in claim 1 and 2, its pre-treatment feature is: at neutral zone, adopt metering valve to add sheet alkali and regulate pH value, controlling pH value is 8～10, and the follow-up 0.5%PAC of adding carries out coagulation, adds in addition the organic discoloring agent dosage of positively charged ion 3-6mg/L.The organic discoloring agent of positively charged ion is dimethyl diallyl ammonium chloride polymkeric substance (PD M D AA C).
4. method according to claim 1, the feature in its combined treatment stage is: after pretreatment stage, to waste water microwave radiation 1min, microwave irradiation power is 1.2kw.
5. according to the method described in claim 1 and 4, the feature in its combined treatment stage is: the light source of used photocatalysis is ultraviolet lamp.
6. according to the method described in claim 1,4 and 5, it is characterized in that: the electrode materials of its photoelectrocatalysis is TiO
2film optoelectronic pole, current density 40mA/cm
2, luminous range is 4～8cm, photoelectrocatalysis reaction times 0.5～1.5h.
7. method according to claim 1, zeolite and slag that the filtering adsorbing material that waste water filtering absorption phase adopts is industrial waste.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104150657A (en) * | 2014-07-25 | 2014-11-19 | 中国环境科学研究院 | Sewage three-level effluent advanced treatment device and treatment method |
| CN104556556A (en) * | 2014-12-03 | 2015-04-29 | 东华大学 | Method for deep treatment of printing and dyeing chemical comprehensive wastewater |
| CN106277509A (en) * | 2016-11-04 | 2017-01-04 | 金福兴 | A kind of processing method containing azo dye wastewater |
| CN109626676A (en) * | 2019-02-15 | 2019-04-16 | 北京今大禹环境技术股份有限公司 | A method of reverse osmosis concentrated organic pollutants are handled using microwave-electro-catalysis group technology |
| CN109851114A (en) * | 2019-02-15 | 2019-06-07 | 北京今大禹环境技术股份有限公司 | A kind of processing method of the reverse osmosis concentrated organic pollutants of coking wastewater based on photoelectrocatalysis |
-
2012
- 2012-08-01 CN CN201210271454.3A patent/CN103570165A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104150657A (en) * | 2014-07-25 | 2014-11-19 | 中国环境科学研究院 | Sewage three-level effluent advanced treatment device and treatment method |
| CN104150657B (en) * | 2014-07-25 | 2016-02-17 | 中国环境科学研究院 | The device of a kind of sewage three grades of water outlet advanced treatment and treatment process |
| CN104556556A (en) * | 2014-12-03 | 2015-04-29 | 东华大学 | Method for deep treatment of printing and dyeing chemical comprehensive wastewater |
| CN106277509A (en) * | 2016-11-04 | 2017-01-04 | 金福兴 | A kind of processing method containing azo dye wastewater |
| CN109626676A (en) * | 2019-02-15 | 2019-04-16 | 北京今大禹环境技术股份有限公司 | A method of reverse osmosis concentrated organic pollutants are handled using microwave-electro-catalysis group technology |
| CN109851114A (en) * | 2019-02-15 | 2019-06-07 | 北京今大禹环境技术股份有限公司 | A kind of processing method of the reverse osmosis concentrated organic pollutants of coking wastewater based on photoelectrocatalysis |
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Application publication date: 20140212 |