CN113501630B - Printing and dyeing wastewater treatment system - Google Patents
Printing and dyeing wastewater treatment system Download PDFInfo
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- CN113501630B CN113501630B CN202111046738.8A CN202111046738A CN113501630B CN 113501630 B CN113501630 B CN 113501630B CN 202111046738 A CN202111046738 A CN 202111046738A CN 113501630 B CN113501630 B CN 113501630B
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- 238000004043 dyeing Methods 0.000 title claims abstract description 37
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 25
- 230000009467 reduction Effects 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000004062 sedimentation Methods 0.000 claims abstract description 33
- 230000020477 pH reduction Effects 0.000 claims abstract description 31
- 239000010802 sludge Substances 0.000 claims abstract description 29
- 238000001179 sorption measurement Methods 0.000 claims abstract description 25
- 239000012528 membrane Substances 0.000 claims abstract description 21
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 25
- 238000000108 ultra-filtration Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 4
- 239000003245 coal Substances 0.000 claims description 3
- 238000001471 micro-filtration Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 abstract description 19
- 239000000987 azo dye Substances 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 9
- 239000003344 environmental pollutant Substances 0.000 description 6
- 230000002829 reductive effect Effects 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 5
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 4
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000006228 supernatant Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 3
- 229910052683 pyrite Inorganic materials 0.000 description 3
- 239000011028 pyrite Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000001784 detoxification Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 238000005067 remediation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003062 neural network model Methods 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
- C02F1/705—Reduction by metals
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Sorption (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to a printing and dyeing wastewater treatment system which sequentially comprises a biological adsorption tank (1), an anaerobic acidification tank (2), a reduction tank (3), a sedimentation tank (4), a membrane filter tank (5), an anaerobic tank (6) and an aerobic tank (7). And a sludge outlet pipe is arranged at the bottom of the biological adsorption tank (1) and communicated with the anaerobic acidification tank (2). An anaerobic water outlet pipe is arranged at the middle upper part or the top of the anaerobic acidification tank (2). The anaerobic water outlet pipe is communicated with the reduction tank (3). The reduction tank (3) is provided with a reducing agent feeding device, and the upper part of the reduction tank (3) is provided with a reduction water outlet pipe. The reduction water outlet pipe is communicated with the sedimentation tank (4). The upper part of the sedimentation tank is provided with a sedimentation water outlet pipe, the sedimentation water outlet pipe is communicated with the membrane filter tank (5), the effluent of the membrane filter tank (5) is conveyed to the anaerobic tank (6), and the anaerobic tank (6) is connected with the aerobic tank (7). The dyeing wastewater treatment system can greatly reduce the chromaticity of wastewater.
Description
Technical Field
The invention belongs to the field of wastewater treatment, and particularly relates to a printing and dyeing wastewater treatment system.
Background
In the production process of the printing and dyeing industry, printing and dyeing wastewater with the characteristics of high chromaticity, high COD (chemical oxygen demand), poor biodegradability and difficult treatment can be generated, wherein the azo dye is the most difficult component to treat. How to degrade azo dyes becomes the most important step in the process for treating printing and dyeing wastewater.
In recent years, zero-valent iron has the advantages of high efficiency, simple operation, low cost and the like for removing pollutants in water, and is widely applied to environmental remediation and treatment, the research on azo dye wastewater treatment by the zero-valent iron is concerned, and the application of nano zero-valent iron (1-100 nm) to environmental pollutant treatment and remediation is a hot topic in the field of domestic and foreign environmental research. The nano zero-valent iron has the advantages of small size, large specific surface area, high surface energy, high surface atom proportion, incomplete surface atom coordination, excellent catalytic selectivity and high reaction activity.
CN 109851024A discloses a method for rapidly degrading azo dyes in wastewater, firstly, the pH value of a water body containing the azo dyes to be treated is adjusted to 3.0-6.0, iron-based amorphous powder is put into the water body, and the iron-based amorphous alloy added in each milliliter of the water body containing the azo dyes is not less than 0.024 g; then carrying out oscillation reaction on the mixed solution at the temperature of 50-60 ℃ for 10-30 min; therefore, although the process can achieve the treatment purpose, the usage amount of the iron-based alloy is large, the cost is high, and the difficulty is high.
CN109942067A discloses a method for removing azo dyes by mixing zero-valent iron and pyrite, comprising the following steps: crushing and cleaning zero-valent iron and pyrite; controlling the pH value of the azo dye wastewater to be 3-10; mixing the treated zero-valent iron and pyrite with the azo dye wastewater for reaction; the method needs to control the pH value of the azo dye wastewater, and although partial effect can be achieved under the alkaline pH condition, the treatment effect is obviously reduced.
CN112250166A discloses a printing and dyeing wastewater high-efficiency detoxification gradient treatment method based on an intelligent SBR electrode process, which realizes high-efficiency open-loop detoxification of azo dye molecules in printing and dyeing wastewater through the action of a bioelectrode, realizes gradient concentration cyclic treatment of the printing and dyeing wastewater in an SBR reactor through a cyclic batch water inlet and outlet mode, and realizes intelligent operation by combining real-time prediction and accurate regulation and control of a neural network model on the SBR reactor. According to the process, the biological electrode is utilized to detoxify azo dye molecules in the printing and dyeing wastewater through ring opening, but due to the existence of the anode, part of nitrogen compounds can be oxidized into toxic substances, and meanwhile, due to the toxic action of the azo dye, the microbial activity can be influenced, and the degradation efficiency is difficult to maintain.
Meanwhile, the azo pollutants contained in the existing printing and dyeing wastewater have low relative content, and the azo bond can be broken only by adding excessive zero-valent iron, so that the treatment cost is high and the efficiency is low.
How to improve the efficiency of treating printing and dyeing wastewater by zero-valent iron and reduce the treatment cost by a reduction method becomes an important research topic.
Disclosure of Invention
The invention aims to provide a printing and dyeing wastewater treatment system.
In order to solve the technical problem, the invention provides a printing and dyeing wastewater treatment system. The printing and dyeing wastewater treatment system sequentially comprises a biological adsorption tank, an anaerobic acidification tank, a reduction tank, a sedimentation tank, a membrane filter tank, an anaerobic tank and an aerobic tank. The biological adsorption tank is provided with a water inlet, the bottom of the biological adsorption tank is provided with a sludge outlet pipe, and the sludge outlet pipe is communicated with the anaerobic acidification tank. The anaerobic acidification tank is characterized in that an anaerobic water outlet pipe is arranged at the middle upper part or the top of the anaerobic acidification tank, the anaerobic water outlet pipe is communicated with the reduction tank, and the reduction tank is provided with a reducing agent feeding device. Zero-valent iron is arranged in the reducing agent feeding device, and a reducing water outlet pipe is arranged at the upper part of the reducing pool. The reduction water outlet pipe is communicated with the sedimentation tank, the sedimentation water outlet pipe is arranged on the upper portion of the sedimentation tank and communicated with the membrane filter tank, the effluent of the membrane filter tank is conveyed to the anaerobic tank, and the anaerobic tank is connected with the aerobic tank.
The printing and dyeing wastewater treatment system has the advantages that:
1. azo dyes contained in the printing and dyeing wastewater are difficult to degrade and have biotoxicity, and if the azo dyes are directly subjected to biochemical treatment, the treatment efficiency is extremely low and the treatment effect is unstable; the biological adsorption tank is adopted to adsorb the dye, so that the chromaticity of the wastewater can be greatly reduced only by the step, and the dye pollutants are directly adsorbed on organisms;
2. and (2) conveying the dye pollutants adsorbed to an anaerobic acidification tank for acidification treatment, when the pH value is reduced to 4.5-6.3, conveying the supernatant of the anaerobic acidification tank to a reduction tank, wherein a reducing agent zero-valent iron is added into the reduction tank, and under the action of the zero-valent iron in an anaerobic acidic environment, azo pigments in the supernatant are broken under the reduction action of the zero-valent iron, so that the chromaticity is reduced.
3. And after reductive zero-valent iron is added into the reduction tank, conveying the sludge into a sedimentation tank for sedimentation treatment, mixing the settled sludge with sludge in an anaerobic acidification tank, conveying the mixture to a plate-frame filter for dehydration, and then carrying out reduction smoldering treatment, wherein reductive coal powder/carbon powder and unreacted zero-valent iron in the sludge continue to perform bond breaking reaction with unreacted azo dye in the sludge, so that the degradation of the azo dye is realized.
4. And a membrane filter is arranged to separate non-settled substances from the effluent in the effluent of the sedimentation tank, so that toxic substances are prevented from entering a subsequent anaerobic tank and an aerobic tank.
5. The micro-filter and the ultrafiltration pool are arranged, the arrangement of the ultrafiltration pool can separate the macromolecular pollutants from the heavy metal ions, and then the effluent containing the heavy metal is electrically treated, so that the heavy metal is prevented from influencing the sludge activity of the anaerobic pool and the aerobic pool.
Drawings
FIG. 1 is a schematic view of a printing and dyeing wastewater treatment system;
FIG. 2 is a schematic view of a printing and dyeing wastewater treatment system;
FIG. 3 is a schematic view of a printing and dyeing wastewater treatment system.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," when used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
The embodiment of the invention discloses a printing and dyeing wastewater treatment system which sequentially comprises a biological adsorption tank 1, an anaerobic acidification tank 2, a reduction tank 3, a sedimentation tank 4, a membrane filter tank 5, an anaerobic tank 6 and an aerobic tank 7. The biological adsorption tank 1 sets up the water inlet, 1 bottom in the biological adsorption tank sets up out the mud pipe, it communicates to go out the mud pipe anaerobic acidification tank 2, 2 middle and upper portions or top in anaerobic acidification tank set up the anaerobism outlet pipe, anaerobism outlet pipe intercommunication reduction pond 3, reduction pond 3 sets up the reductant and throws the feeder apparatus, the reductant is thrown and is set up zero-valent iron in the feeder apparatus, 3 upper portions in reduction pond set up the reduction outlet pipe, reduction outlet pipe intercommunication sedimentation tank 4, sedimentation tank upper portion sets up the sedimentation outlet pipe, subside the outlet pipe intercommunication membrane filtering tank 5, the play water of membrane filtering tank 5 is carried to anaerobic tank 6, anaerobic tank 6 is connected aerobic tank 7.
Further, the bottom of the anaerobic acidification tank 2 and/or the sedimentation tank 4 is provided with a conical tank, and the conical tank is connected with a plate frame filter 8. And conveying the mud cakes produced by the plate frame filter 8 to a smoldering furnace 9, which is shown in figure 1.
Further, the outlet water of the plate-frame filter 8 is conveyed to the membrane filter 5 or the reduction tank 3.
Further, the membrane filtration tank 5 is an ultrafiltration tank 51 and/or a microfiltration tank 52.
Further, the membrane filter 5 is a micro filter 52 and an ultrafiltration 51 which are arranged in sequence; the micro filter 52 is used for conveying concentrated water to the reduction tank 3; the effluent of the micro-filter 52 is sent to an ultrafiltration tank 51, and the concentrated water of the ultrafiltration tank is sent to an anaerobic tank 6, see fig. 2.
Furthermore, reduction smoldering is adopted in the smoldering furnace 9. And a reducing gas or an inert gas is introduced into the braising furnace 9 in the reduction braising process, and a reducing agent is added at the same time, wherein the reducing agent is coal powder and/or carbon powder.
Further, the mass ratio of the reducing agent to the dry weight of the mud cake is 1: 9-15.
Further, a wall breaking tank 10 and a mud-water separation tank 11 are arranged between the anaerobic acidification tank 2 and the reduction tank 3, and the effluent generated by wall breaking and dewatering of the sludge produced in the anaerobic acidification tank 2 is conveyed to the reduction tank 3, as shown in fig. 3.
Further, a wall breaking tank 10 and a mud-water separation tank 11 are arranged between the biological adsorption tank 1 and the anaerobic acidification tank 2. And the sludge discharged from the sludge-water separation tank is conveyed to the plate frame filter 8.
Further, the carbon residue part generated by the smoldering furnace is conveyed to the biological adsorption tank 1.
Further, the dry weight ratio of the carbon slag to the sludge in the biological adsorption tank is 1: 1-3.
Further, a sludge outlet of the anaerobic tank and/or the aerobic tank is communicated to the biological adsorption tank.
Example 1
Taking certain printing and dyeing wastewater, pH9.4, chromaticity 510, CODcr1200, ammonia nitrogen 121, hexavalent chromium 1.9 and Pb2+1.45，Zn2+5.1；
The printing and dyeing wastewater is conveyed to a biological adsorption tank 1, and the sludge load in the biological adsorption tank 1 is 3-6kgBOD5/(kgMLSS. d), sludge concentration 2500--1The hydraulic retention time is 0.3-0.45 h;
and (2) conveying the sludge discharged from the biological adsorption tank to an anaerobic acidification tank 2, adjusting operation parameters in the anaerobic acidification tank, controlling the pH value of the sludge to be between 4.5 and 5, maintaining the reaction condition for reaction for 1 hour, conveying the supernatant of the anaerobic tank to a reduction tank 3, adding reducing iron powder into the reduction tank 3 in an adding amount of 0.2g/L, and reducing the chroma to 68 after the reaction for 0.5 hour. Conveying the mixture in the reduction tank 3 to a sedimentation tank for sedimentation, conveying the sedimentation tank sedimentation sludge to a plate-frame filter tank 8 after being mixed with the sludge in the anaerobic acidification tank 2, conveying the mixture of the effluent of the plate-frame filter tank 8 and the effluent of the sedimentation tank 4 to a membrane filter tank 5 after being mixed, wherein the membrane filter tank 5 is a micro-filter tank 52 and an ultrafiltration tank 51 which are sequentially arranged; the micro filter 52 is used for conveying concentrated water to the reduction tank 3; the effluent of the micro-filter 52 is conveyed to an ultrafiltration tank 51, and the concentrated water of the ultrafiltration tank is conveyed to an anaerobic tank 6; the concentrated water in the super filter is sequentially conveyed to an anaerobic tank 6 and an aerobic tank 7.
And (3) effluent quality: pH7.1, chroma 33, CODcr65, ammonia nitrogen 8.3, hexavalent chromium 1.02, Pb2+0.56，Zn2+1.41。
Example 2
Taking certain printing and dyeing wastewater, pH9.4, chromaticity 510, CODcr1200, ammonia nitrogen 121, hexavalent chromium 1.9 and Pb2+1.45，Zn2+5.1；
The printing and dyeing wastewater is conveyed to a biological adsorption tank 1, and the sludge load in the biological adsorption tank 1 is 3-6kgBOD5/(kgMLSS. d), sludge concentration 2500--1The hydraulic retention time is 0.3-0.45 h;
conveying the sludge discharged from the biological adsorption tank to an anaerobic acidification tank 2, adjusting operation parameters in the anaerobic acidification tank, controlling the pH value of the sludge to be maintained between 5 and 6, maintaining the reaction condition for reaction for 1 hour, then conveying the supernatant of the anaerobic tank to a reduction tank 3, adding reducing iron powder into the reduction tank 3, wherein the adding amount is 0.2g/L, reducing the chroma to 79 after reacting for 0.5 hour, conveying the mixture in the reduction tank 3 to a sedimentation tank for sedimentation, conveying the sedimentation tank sedimentation sludge and the sludge in the anaerobic acidification tank 2 to a plate-and-frame filter tank 8 after mixing, conveying the water discharged from the plate-and-frame filter tank 8 and the water discharged from the sedimentation tank 4 to a membrane filter tank 5, wherein the membrane filter tank 5 is a microfiltration tank, and the discharged water is sequentially conveyed to the anaerobic tank 6 and an aerobic tank 7.
And (3) effluent quality: pH6.9, chroma 23, CODcr15, ammonia nitrogen 3.1, hexavalent chromium 0.02, Pb2+Not detected, Zn2+0.12。
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details given herein and to the embodiments shown and described without departing from the generic concept as defined by the claims and their equivalents.
Claims (10)
1. The printing and dyeing wastewater treatment system is characterized by comprising a biological adsorption tank (1), an anaerobic acidification tank (2), a reduction tank (3), a sedimentation tank (4), a membrane filter tank (5), an anaerobic tank (6) and an aerobic tank (7) in sequence, wherein the biological adsorption tank (1) is provided with a water inlet, the bottom of the biological adsorption tank (1) is provided with a sludge outlet pipe which is communicated with the anaerobic acidification tank (2), the middle upper part or the top of the anaerobic acidification tank (2) is provided with an anaerobic water outlet pipe which is communicated with the reduction tank (3), the reduction tank (3) is provided with a reducing agent adding device, zero-valent iron is arranged in the reducing agent adding device, the upper part of the reduction tank (3) is provided with a reduction water outlet pipe which is communicated with the sedimentation tank (4), the upper part of the sedimentation tank is provided with a sedimentation water outlet pipe, the sedimentation water outlet pipe is communicated with the membrane filter tank (5), the outlet water of the membrane filter tank (5) is conveyed to an anaerobic tank (6), and the anaerobic tank (6) is connected with the aerobic tank (7).
2. The printing and dyeing wastewater treatment system according to claim 1, characterized in that the bottom of the anaerobic acidification tank (2) and/or the sedimentation tank (4) is provided with a conical tank, and the conical tank is connected to the plate frame filter (8).
3. The printing and dyeing wastewater treatment system according to claim 2, characterized in that the sludge cake produced by the plate frame filter (8) is conveyed to a smoldering furnace (9).
4. The printing and dyeing wastewater treatment system according to claim 1, characterized in that the membrane filter (5) is an ultrafiltration tank (51) and/or a microfiltration tank (52).
5. The printing and dyeing wastewater treatment system according to claim 4, characterized in that the membrane filter (5) is a micro filter (52) and an ultrafiltration (51) arranged in sequence; the concentrated water of the micro filter (52) is conveyed to the reduction pool (3); the effluent of the micro-filter (52) is conveyed to an ultrafiltration tank (51), and the concentrated water of the ultrafiltration tank is conveyed to an anaerobic tank (6).
6. The printing and dyeing wastewater treatment system according to claim 3, characterized in that reduction smoldering is adopted in the smoldering furnace (9), reducing gas or inert gas is introduced into the smoldering furnace (9) during the reduction smoldering process, and a reducing agent is added, wherein the reducing agent is coal powder and/or carbon powder.
7. The printing and dyeing wastewater treatment system according to claim 1, characterized in that a wall breaking tank (10) and a sludge-water separation tank (11) are arranged between the anaerobic acidification tank (2) and the reduction tank (3), and effluent produced after wall breaking and dewatering of sludge produced in the anaerobic acidification tank (2) is conveyed to the reduction tank (3).
8. The printing and dyeing wastewater treatment system according to claim 1, characterized in that a wall breaking tank (10) and a sludge-water separation tank (11) are arranged between the biological adsorption tank (1) and the anaerobic acidification tank (2).
9. A printing and dyeing wastewater treatment system according to claim 3, characterized in that the carbon residue produced by the smoldering furnace is conveyed to the biological adsorption tank (1).
10. The printing and dyeing wastewater treatment system according to claim 9, wherein the dry weight ratio of the carbon residue to the sludge in the biological adsorption tank is 1: 1-3.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206814600U (en) * | 2017-06-23 | 2017-12-29 | 长兴海德纺织科技有限公司 | A kind of processing system of dyeing waste water |
| CN110282738A (en) * | 2019-05-16 | 2019-09-27 | 厦门大学 | A method of azo dyeing waste water is handled using biofilter |
| CN210620395U (en) * | 2019-05-16 | 2020-05-26 | 厦门大学 | Biological filter device for treating azo printing and dyeing wastewater |
| CN112499905A (en) * | 2020-12-01 | 2021-03-16 | 严惠琴 | Organophosphorus wastewater treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206814600U (en) * | 2017-06-23 | 2017-12-29 | 长兴海德纺织科技有限公司 | A kind of processing system of dyeing waste water |
| CN110282738A (en) * | 2019-05-16 | 2019-09-27 | 厦门大学 | A method of azo dyeing waste water is handled using biofilter |
| CN210620395U (en) * | 2019-05-16 | 2020-05-26 | 厦门大学 | Biological filter device for treating azo printing and dyeing wastewater |
| CN112499905A (en) * | 2020-12-01 | 2021-03-16 | 严惠琴 | Organophosphorus wastewater treatment system |
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