CN105384308A - Dye wastewater treatment method - Google Patents
Dye wastewater treatment method Download PDFInfo
- Publication number
- CN105384308A CN105384308A CN201510818812.1A CN201510818812A CN105384308A CN 105384308 A CN105384308 A CN 105384308A CN 201510818812 A CN201510818812 A CN 201510818812A CN 105384308 A CN105384308 A CN 105384308A
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- Prior art keywords
- waste water
- treatment
- enters
- dyestuff
- water
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- 238000004065 wastewater treatment Methods 0.000 title abstract description 8
- 239000002351 wastewater Substances 0.000 claims abstract description 85
- 238000011282 treatment Methods 0.000 claims abstract description 53
- 238000000034 method Methods 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000004043 dyeing Methods 0.000 claims abstract description 20
- 238000004062 sedimentation Methods 0.000 claims abstract description 15
- 230000015556 catabolic process Effects 0.000 claims abstract description 5
- 238000006731 degradation reaction Methods 0.000 claims abstract description 5
- 239000000975 dye Substances 0.000 claims description 54
- 229910052760 oxygen Inorganic materials 0.000 claims description 19
- 239000001301 oxygen Substances 0.000 claims description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 17
- 239000006228 supernatant Substances 0.000 claims description 17
- 238000005189 flocculation Methods 0.000 claims description 15
- 230000016615 flocculation Effects 0.000 claims description 15
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 230000003647 oxidation Effects 0.000 claims description 13
- 238000007254 oxidation reaction Methods 0.000 claims description 13
- 230000007062 hydrolysis Effects 0.000 claims description 12
- 238000006460 hydrolysis reaction Methods 0.000 claims description 12
- 230000020477 pH reduction Effects 0.000 claims description 12
- 230000003197 catalytic effect Effects 0.000 claims description 11
- 238000002203 pretreatment Methods 0.000 claims description 11
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 9
- 239000004571 lime Substances 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 238000001556 precipitation Methods 0.000 claims description 8
- 230000008021 deposition Effects 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 230000031018 biological processes and functions Effects 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 238000000247 postprecipitation Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 208000014451 palmoplantar keratoderma and congenital alopecia 2 Diseases 0.000 claims description 3
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 claims description 3
- 238000005273 aeration Methods 0.000 claims description 2
- 230000033228 biological regulation Effects 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- 239000003002 pH adjusting agent Substances 0.000 claims description 2
- 238000004042 decolorization Methods 0.000 abstract description 2
- 239000004753 textile Substances 0.000 abstract description 2
- 239000005416 organic matter Substances 0.000 abstract 1
- 239000003403 water pollutant Substances 0.000 abstract 1
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 4
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 2
- 150000004056 anthraquinones Chemical class 0.000 description 2
- 150000001555 benzenes Chemical class 0.000 description 2
- -1 diphenyl amine compound Chemical class 0.000 description 2
- 238000007730 finishing process Methods 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- UPLPHRJJTCUQAY-WIRWPRASSA-N 2,3-thioepoxy madol Chemical compound C([C@@H]1CC2)[C@@H]3S[C@@H]3C[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@](C)(O)[C@@]2(C)CC1 UPLPHRJJTCUQAY-WIRWPRASSA-N 0.000 description 1
- DMBHHRLKUKUOEG-UHFFFAOYSA-N N-phenyl aniline Natural products C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 1
- IIFRZKCFFGQPME-UHFFFAOYSA-N S(O)(O)(=O)=O.[O].Cl Chemical compound S(O)(O)(=O)=O.[O].Cl IIFRZKCFFGQPME-UHFFFAOYSA-N 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical group C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 229940035422 diphenylamine Drugs 0.000 description 1
- 239000010919 dye waste Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002703 mutagenesis Methods 0.000 description 1
- 231100000350 mutagenesis Toxicity 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
-
- 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
- C02F3/02—Aerobic processes
-
- 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
Abstract
The invention provides a dye wastewater treatment method, which is used for treating high-concentration dye wastewater or dyeing and finishing integrated wastewater through the steps o f pretreatment, biological treatment, homogeneous adjusting, deep treatment, final sedimentation and drainage and the like. The method is wide in concentration and chromaticity ranges of applicable organic matters, high in organic matter degradation rate, and high in decolorization rate, and the water quality of treated dye wastewater is stable, and meets the requirements of Discharge Standards of Water Pollutants for Dyeing and Finishing of Textile Industry (GB 4287-1992).
Description
Technical field
The invention belongs to waste water treatment field, be specifically related to a kind for the treatment of process of waste water from dyestuff.
Background technology
Dye industry belongs to high energy consumption, high pollutive industries.According to measuring and calculating, China often produces 1t dyestuff, about waste discharge 744m
3in production and use procedure, about there is 10-20% dyestuff to be discharged in water body. the basic raw material of DYE PRODUCTION is benzene series, naphthalene system, anthraquinone, aniline and diphenyl amine compound, and in production process the many and material such as metal, salt chelating, most of dyestuff is poisonous hardly degraded organic substance, chemical stability is strong, there is carcinogenic, teratogenesis, mutagenesis, cause waste water from dyestuff and become one of unmanageable trade effluent, have the advantages that colourity is dark, alkalescence is large, organic pollutant content is high and change of water quality is large.Harm humans is healthy, and havoc water body, soil and ecotope, cause unthinkable consequence.
It is the important prerequisite of dye wastewater treatment to the effective degraded of dyestuff and treatment technology.For most of dyestuff chemistry stable in properties, the feature being difficult to degraded, various countries scientist pays much attention to the degraded of dye well waste water from dyestuff and the research for the treatment of process.Along with the development of scientific-technical progress and pollutant abatement technology, the mankind also have found the method for a lot of effective dye wastewater treatment, sum up nothing more than physico-chemical process, biological process, materialization-bio combined method, but for same waste water from dyestuff, because technical parameter is different, even if adopt same technique possibility result also different, therefore, in actual applications, the selection of technical parameter is the key of technique success or failure.
Summary of the invention
In order to waste water from dyestuff governing problem of effectively determining, eliminate the bottleneck of dyeing development.The present invention adopts the step such as pre-treatment, biological treatment, all quality regulate, advanced treatment, whole mattress sinking water for the treatment of dye wastewater with high concentration or dyeing and finishing comprehensive wastewater, adapt to organic concentration, chromaticity range is wide, degradation effect of organic compound is high, and percent of decolourization is high, the waste water from dyestuff water quality stabilizing after process.
In order to realize foregoing invention object, the present invention adopts following combination process to process waste water from dyestuff:
1) pre-treatment;
2) carry out a biological disposal upon;
3) equal quality regulate;
4) advanced treatment;
5) whole mattress sinking water.
Preferably, the treatment process of described waste water from dyestuff, it comprises the following steps:
1) pre-treatment: flocculation, precipitation, pH value adjustment;
2) carry out a biological disposal upon: anaerobic biological treatment, acidication process, Aerobic biological process;
3) equal quality regulate: precipitation, pH value adjustment;
4) advanced treatment: catalyzed oxidation, precipitation;
5) whole mattress sinking water: pH value adjustment, eventually heavy, draining.
Preferably, the treatment process of described waste water from dyestuff, it comprises the following steps:
1) pre-treatment: after waste water from dyestuff enters flocculation basin, adds FeCl according to COD concentration and colourity in waste water
3, diatomite and lime carries out flocculation treatment, flocculation reaction completes postprecipitation, enters next workshop section after supernatant liquor adjustment pH;
2) carry out a biological disposal upon: pretreated waste water enters anaerobic reation pool, decolours, degrades to organism under the effect of anaerobion to waste water; Anaerobic pond water outlet enters hydrolysis acidification pool, and under micro-oxygen environment, organism is hydrolyzed, and improves wastewater biodegradability; Hydrolysis acidification pool water outlet enters aerobic reaction pond, provides dissolved oxygen by aerating apparatus, denitrogenation under aerobic environment, dephosphorization, decolouring, degradation of organic substances;
3) equal quality regulate: biological treatment water outlet enters settling tank, and supernatant liquor enters after pH value adjustment is carried out in homogeneous pond and enters next workshop section;
4) advanced treatment: the waste water after biological treatment enters catalytic oxidation pond, and catalytic oxidation system is by H
2o
2-nano-TiO
2-UV-light-O
2composition, provides dissolved oxygen by aerating apparatus, destroys chromophoric group and the molecular structure of dye molecule further, thus reaches the object of decolouring;
5) whole mattress sinking water: the water outlet after advanced treatment enters final deposition pool, discharge supernatant liquor, waste water from dyestuff is disposed.
Further preferably, the treatment process of described waste water from dyestuff, it comprises the following steps:
1) pre-treatment: waste water from dyestuff enters in flocculation basin, FeCl
3add-on is 5-50mg/g (COD
cr), FeCl
3, diatomite and lime additional proportion be mass ratio (10-20): (2-4): (0.5-2), after stirring reaction 5-15 minute, flocculation reaction completes, and enters next workshop section after supernatants after precipitation adjustment pH to 6-8;
2) carry out a biological disposal upon: pretreated waste water enters anaerobic reation pool, and the residence time is 4-8 hour; Anaerobic pond water outlet enters hydrolysis acidification pool, and the residence time is 12-24 hour, and dissolved oxygen concentration is 0.2-0.3mg/L; Hydrolysis acidification pool water outlet enters Aerobic Pond, and the residence time is 6-10 hour, and dissolved oxygen concentration is 4-6mg/L;
3) equal quality regulate: biological treatment water outlet enters settling tank, sedimentation time 2-5 hour, and supernatant liquor enters next workshop section after entering homogeneous pond adjusted to ph 4-6;
4) advanced treatment: the waste water after biological treatment enters catalytic oxidation pond, H
2o
2add-on is according to H
2o
2with wastewater volume than being 0.2-1.2 ‰, nano-TiO
2add-on is according to TiO
2with wastewater quality than being 1.0-3.0 ‰, TiO
2can reuse, ultraviolet wavelength 254nm, irradiation time 15-30 minute, dissolved oxygen concentration is 2-5mg/L;
5) whole mattress sinking water: the water outlet after advanced treatment enters final deposition pool, sedimentation time 4-6 hour, discharge supernatant liquor, waste water from dyestuff is disposed.
As most preferably scheme of the present invention, following parameter is limited:
1) FeCl
3add-on is 30-40mg/g (COD
cr), FeCl
3, diatomite and lime additional proportion be mass ratio 15:3:1.
2) H
2o
2add-on is according to H
2o
2with wastewater volume than being 0.5-1.0 ‰, nano-TiO
2add-on is according to TiO
2with wastewater quality than being 1.6-2.2 ‰, dissolved oxygen concentration is 3-4mg/L.
3) pH adjusting agent is for adjusting and reducing agent or acidity regulator, and wherein adjusting and reducing agent is one in sodium hydroxide, calcium hydroxide or its combination, and acidity regulator is one in sulfuric acid, hydrochloric acid or its combination.
4) anaerobic reation pool is the one in UASB, IC reactor, aerobic reaction pond is the one in SBR, CASS, catalytic oxidation, settling tank and final deposition pool are the one in horizontal sedimentation tank, width sedimentation tank, and described aerating apparatus is the one in perforated pipe aerating regulation, disc type aeration.
Dye wastewater treatment combination process of the present invention is adapted to dye wastewater with high concentration or the dyeing and finishing comprehensive wastewaters such as process destarch, boiling-off, dyeing, wherein dye wastewater with high concentration COD is 3000-8000mg/L, colourity is more than 2000 times, dyeing and finishing comprehensive wastewater COD is 500-3000mg/L, and colourity is 500 times-2000 times.
Compare with existing method of wastewater treatment, dye waste water treatment method tool of the present invention has the following advantages:
1) present invention process combination is reasonable, technical parameter is reliable, and the waste water quality after process is stablized, and meets " textile dyeing and finishing industrial water pollution thing emission standard " (GB4287-1992) emission standard requirement.
2) pre-treatment workshop section adopts FeCl
3the heterogeneous flocculation technique of+diatomite+lime, effectively reduces organic loading and the toxicity inhibition of biological treatment, ensure that the Effec-tive Function of biological treatment.
3) biological treatment workshop section adopts anaerobic biological treatment-acidication process-Aerobic biological process combination process, give full play to the Degradation being present in microorganism under various environment, in the process, the poisonous hardly degraded organic substances such as major part benzene series, naphthalene system, anthraquinone, aniline and p-diaminodiphenyl are able to effective removal.
4) advanced treatment workshop section adopts H
2o
2-nano-TiO
2-UV-light-O
2multidimensional catalytic oxidation system, destroys chromophoric group and the molecular structure of dye molecule further, thus reaches the object of degree of depth decolouring.
5) waste water from dyestuff combined treatment process wide accommodation of the present invention, can not only process the dye wastewater with high concentration such as destarch, boiling-off, dyeing, and be equally applicable to the process of the lower dyeing and finishing comprehensive wastewater of concentration
Embodiment
Below by specific embodiment, the present invention is further described, and those skilled in the art should be able to know, and the present invention is not only limited to this embodiment.
Embodiment 1:
Certain printing and dyeing mill mainly processes the dyeing and finishing process of cotton, fiber crops, man-made fiber etc., and its hc effluent produced is mainly derived from the operations such as desized wastewater, boiled-off waste water, dyeing waste-water, printing waste water, and kind of dyes is complicated, and COD concentration, colourity are high.Water-quality guideline is in table one.Adopt treatment process of the present invention to process, operate as follows:
Waste water from dyestuff enters in flocculation basin, FeCl
3add-on is 35mg/g (COD
cr), FeCl
3, diatomite and lime additional proportion be mass ratio 15:3:1, stirring reaction 5-15 minute postprecipitation.Supernatant liquor enters UASB anaerobic reation pool after adding sulfuric acid adjustment pH to 6, the residence time is 6 hours, anaerobic pond water outlet enters hydrolysis acidification pool, the residence time is 18 hours, the dense 0.2-0.3mg/L of dissolved oxygen, hydrolysis acidification pool water outlet enters CASS reaction tank, and the residence time is 8 hours, and dissolved oxygen concentration is 4-6mg/L.Aerobic Pond water outlet enters horizontal sedimentation tank, sedimentation time after 3 hours supernatant liquor enter homogeneous pond, adding sulfuric acid adjusted to ph is enter catalytic oxidation pond, H after 4.0
2o
2add-on is according to H
2o
2be 0.8 ‰ with wastewater volume ratio, nano-TiO
2add-on is according to TiO
2be 1.9 ‰ with wastewater quality ratio, ultraviolet wavelength 254nm, irradiation time 20 minutes, dissolved oxygen concentration is 3mg/L.Water outlet after above-mentioned process enters width sedimentation tank, sedimentation time 5 hours, and discharge supernatant liquor, waste water from dyestuff is disposed.Each unit water quality situation is in table one.
Table one: influent quality and each processing unit effluent quality
Embodiment 2:
Certain printing and dyeing mill mainly processes the dyeing and finishing process of cotton, fiber crops, man-made fiber etc., and its comprehensive wastewater produced is mainly derived from the operations such as desized wastewater, boiled-off waste water, dyeing waste-water, printing waste water, bleaching effluent, and COD concentration, colourity moderate are higher.Water-quality guideline is in table two.Adopt treatment process of the present invention to process, operate as follows:
Waste water from dyestuff enters in flocculation basin, FeCl
3add-on is 15mg/g (COD
cr), FeCl
3, diatomite and lime additional proportion be mass ratio 10::2:0.5, stirring reaction 5-15 minute postprecipitation.Supernatant liquor enters IC anaerobic reation pool after adding sodium hydroxide adjustment pH to 7, the residence time is 6 hours, anaerobic pond water outlet enters hydrolysis acidification pool, the residence time is 18 hours, the dense 0.2-0.3mg/L of dissolved oxygen, hydrolysis acidification pool water outlet enters sbr reactor pond, and the residence time is 7 hours, dissolved oxygen hydrochloric acid sulfuric acid adjusted to ph is enter catalytic oxidation pond, H after 4.0
2o
2add-on is according to H
2o
2be 0.4 ‰ with wastewater volume ratio, nano-TiO
2add-on is according to TiO
2be 1.2 ‰ with wastewater quality ratio, ultraviolet wavelength 254nm, irradiation time 15 minutes, dissolved oxygen concentration is 3mg/L.Water outlet after above-mentioned process enters width sedimentation tank, sedimentation time 4 hours, and discharge supernatant liquor, waste water from dyestuff is disposed.Each unit water quality situation is in table two.
Table two: influent quality and each processing unit effluent quality
Applicant states, above embodiment is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (9)
1. a treatment process for waste water from dyestuff, is characterized in that comprising the following steps:
1) pre-treatment;
2) carry out a biological disposal upon;
3) equal quality regulate;
4) advanced treatment;
5) whole mattress sinking water.
2. the treatment process of waste water from dyestuff as claimed in claim 1, is characterized in that comprising the following steps:
1) pre-treatment: flocculation, precipitation, pH value adjustment;
2) carry out a biological disposal upon: anaerobic biological treatment, acidication process, Aerobic biological process;
3) equal quality regulate: precipitation, pH value adjustment;
4) advanced treatment: catalyzed oxidation, precipitation;
5) whole mattress sinking water: pH value adjustment, eventually heavy, draining.
3. the treatment process of waste water from dyestuff as claimed in claim 2, is characterized in that comprising the following steps:
1) pre-treatment: after waste water from dyestuff enters flocculation basin, adds FeCl according to COD concentration and colourity in waste water
3, diatomite and lime carries out flocculation treatment, flocculation reaction completes postprecipitation, enters next workshop section after supernatant liquor adjustment pH;
2) carry out a biological disposal upon: pretreated waste water enters anaerobic reation pool, decolours, degrades to organism under the effect of anaerobion to waste water; Anaerobic pond water outlet enters hydrolysis acidification pool, and under micro-oxygen environment, organism is hydrolyzed, and improves wastewater biodegradability; Hydrolysis acidification pool water outlet enters aerobic reaction pond, provides dissolved oxygen by aerating apparatus, denitrogenation under aerobic environment, dephosphorization, decolouring, degradation of organic substances;
3) equal quality regulate: biological treatment water outlet enters settling tank, and supernatant liquor enters after pH value adjustment is carried out in homogeneous pond and enters next workshop section;
4) advanced treatment: the waste water after biological treatment enters catalytic oxidation pond, and catalytic oxidation system is by H
2o
2-nano-TiO
2-UV-light-O
2composition, provides dissolved oxygen by aerating apparatus, destroys chromophoric group and the molecular structure of dye molecule further, thus reaches the object of decolouring;
5) whole mattress sinking water: the water outlet after advanced treatment enters final deposition pool, discharge supernatant liquor, waste water from dyestuff is disposed.
4. the treatment process of waste water from dyestuff as claimed in claim 3, is characterized in that comprising the following steps:
1) pre-treatment: waste water from dyestuff enters in flocculation basin, FeCl
3add-on is 5-50mg/g (COD
cr), FeCl
3, diatomite and lime additional proportion be mass ratio (10-20): (2-4): (0.5-2), after stirring reaction 5-15 minute, flocculation reaction completes, and enters next workshop section after supernatants after precipitation adjustment pH to 6-8;
2) carry out a biological disposal upon: pretreated waste water enters anaerobic reation pool, and the residence time is 4-8 hour; Anaerobic pond water outlet enters hydrolysis acidification pool, and the residence time is 12-24 hour, and dissolved oxygen concentration is 0.2-0.3mg/L; Hydrolysis acidification pool water outlet enters Aerobic Pond, and the residence time is 6-10 hour, and dissolved oxygen concentration is 4-6mg/L;
3) equal quality regulate: biological treatment water outlet enters settling tank, sedimentation time 2-5 hour, and supernatant liquor enters next workshop section after entering homogeneous pond adjusted to ph 4-6;
4) advanced treatment: the waste water after biological treatment enters catalytic oxidation pond, H
2o
2add-on is according to H
2o
2with wastewater volume than being 0.2-1.2 ‰, nano-TiO
2add-on is according to TiO
2with wastewater quality than being 1.0-3.0 ‰, TiO
2can reuse, ultraviolet wavelength 254nm, irradiation time 15-30 minute, dissolved oxygen concentration is 2-5mg/L;
5) whole mattress sinking water: the water outlet after advanced treatment enters final deposition pool, sedimentation time 4-6 hour, discharge supernatant liquor, waste water from dyestuff is disposed.
5. the treatment process of waste water from dyestuff as claimed in claim 4, is characterized in that, in pre-treatment step, and FeCl
3add-on is 30-40mg/g (COD
cr), FeCl
3, diatomite and lime additional proportion be mass ratio 15:3:1.
6. the treatment process of waste water from dyestuff as claimed in claim 4, is characterized in that, in advanced treatment step, and H
2o
2add-on is according to H
2o
2with wastewater volume than being 0.5-1.0 ‰, nano-TiO
2add-on is according to TiO
2with wastewater quality than being 1.6-2.2 ‰, dissolved oxygen concentration is 3-4mg/L.
7. the treatment process of the waste water from dyestuff as described in as arbitrary in claim 2-4, it is characterized in that, described pH adjusting agent is for adjusting and reducing agent or acidity regulator, and wherein adjusting and reducing agent is one in sodium hydroxide, calcium hydroxide or its combination, and acidity regulator is one in sulfuric acid, hydrochloric acid or its combination.
8. the treatment process of the waste water from dyestuff as described in as arbitrary in claim 3-6, it is characterized in that, described anaerobic reation pool is the one in UASB, IC reactor, aerobic reaction pond is the one in SBR, CASS, catalytic oxidation, settling tank and final deposition pool are the one in horizontal sedimentation tank, width sedimentation tank, and described aerating apparatus is the one in perforated pipe aerating regulation, disc type aeration.
9. the treatment process of waste water from dyestuff as claimed in claim 1, it is characterized in that described dyeing waste water is dye wastewater with high concentration or the dyeing and finishing comprehensive wastewaters such as destarch, boiling-off, dyeing, wherein dye wastewater with high concentration COD is 3000-8000mg/L, colourity is more than 2000 times, dyeing and finishing comprehensive wastewater COD is 500-3000mg/L, and colourity is 500 times-2000 times.
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| CN114516704A (en) * | 2022-01-19 | 2022-05-20 | 南京大学环境规划设计研究院集团股份公司 | Treatment method of dye wastewater |
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