CN105540752A - Method for treating aniline substances in dye wastewater - Google Patents
Method for treating aniline substances in dye wastewater Download PDFInfo
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- CN105540752A CN105540752A CN201510966781.4A CN201510966781A CN105540752A CN 105540752 A CN105540752 A CN 105540752A CN 201510966781 A CN201510966781 A CN 201510966781A CN 105540752 A CN105540752 A CN 105540752A
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- China
- Prior art keywords
- dyestuff
- waste water
- dye wastewater
- aniline
- category matter
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- 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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4616—Power supply
- C02F2201/46175—Electrical pulses
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention relates to a method for treating aniline substances in dye wastewater. The method comprises the steps: (1) pumping the dye wastewater where the aniline substances are remaining into an electrolytic bath, and meanwhile, adding industrial-grade iron powder into the electrolytic bath; (2) thoroughly mixing the iron powder into the dye wastewater in an air agitation manner, and meanwhile, adjusting the pH value; (3) switching on a pulse power supply to the electrolytic bath under the condition of keeping air agitation, so as to carry out electrolysis; and (4) after the concentration of the aniline substances in the dye wastewater is lower than 5mg/L, enabling the treated dye wastewater to flow in a sedimentation tank for clarification. According to the method, the removal ratio of the aniline substances is relatively high, the COD (Chemical Oxygen Demand) concentration of the dye wastewater can also be lowered; in addition, the method further has the advantages that the treatment process is simple, the amount of used raw materials is small, the treatment cost is relatively low, the time is relatively short, the environment is not polluted, and the like.
Description
Technical field
The present invention relates to the treatment process to aniline category matter remaining in waste water from dyestuff.
Background technology
Aniline (C
6h
7n), aniline oils, amino-benzene is had another name called.It is one of the most important intermediate producing many dyestuffs, and it can be used for manufacturing Acid Ink Blue G, acidic intermedium BS, acid light yellow, direct orange S, direct pink, indigo, disperse yellow brown, cationic pink fg and reactive brilliant red X-SB etc.; , nigrosine red for the manufacture of bronze red, bronze red g, red, phenol cyanines etc. is had in pigment dyestuff; It also directly can make the raw material that dyestuff nigrosine is produced, and contains the complete aniline of a large amount of unreacteds and its derivative, be referred to as aniline category matter in the waste water that production process produces.Aniline category matter is again to the virulent material of human body, even if the aniline category matter concentration that people touch is lower, the time is slightly grown and also can cause toxic hepatic disease.Therefore, people are when the waste water from dyestuff produced fabric printing process carries out harmless treatment, and the problem that emphasis is considered is exactly will remove the aniline category matter remained in waste water from dyestuff as far as possible.But, in waste water from dyestuff not merely only harmful containing this class of aniline category matter, can material to environment, such as, make chemical oxygen demand (COD) (COD in addition, ChemicalOxygenDemand) the various reducing substanceses greatly increased, wherein, mainly organism.And the method for innocent treatment adopted at present, no matter be Physical, chemical method, biological process and electrolytic process, mostly do disposable comprehensive treating process for waste water from dyestuff again.So, as long as each objectionable impurities all processes to obtain preferably method, just all there is complex process, introduce that chemical reagent is more, processing cost is higher and/or the defect such as the treatment time is longer.Especially for the remaining waste water from dyestuff having aniline category matter, also often occur that the process to aniline category matter can not reach the problem of wastewater discharge standard.
Summary of the invention
The object of this invention is to provide that simple, all raw material of a kind of technique is few, processing cost is lower, the treatment time is shorter, and the method for aniline category matter in the dye wastewater treatment of wastewater discharge standard can be reached aniline category matter.
The technical scheme realizing above-mentioned purpose is the method for aniline category matter in a kind of like this dye wastewater treatment, and the feature of the method has the following steps:
1. be that the waste water from dyestuff of 80 ~ 600mg/L pumps in electrolyzer by aniline category matter concentration, simultaneously according to iron powder: the proportioning of waste water from dyestuff=60 ~ 230g: 125L adds technical grade iron powder;
2. cause described iron powder fully to mix in waste water from dyestuff by pneumatic blending mode, adjust ph is 8 ~ 9 simultaneously;
3. under the state of maintenance pneumatic blending, to electrolyzer make pulse power supply to carry out electrolysis; Wherein, the battery lead plate spacing in electrolyzer is 3 ~ 4cm, and the dutycycle of pulsed current is 30% ~ 70%, current density is 400 ~ 900A/m
2;
4., after the aniline category matter concentration treating in waste water from dyestuff reaches below 5mg/L, flowed in settling tank by processed waste water from dyestuff and clarify, namely in waste water from dyestuff, aniline category matter remaining quantity meets the waste water from dyestuff of emission standard.
As can be seen from scheme, the present invention carried out electrolysis with the pulse power to containing the waste water from dyestuff of aniline category matter afterwards what be mixed with technical grade iron powder, and must not regulate temperature and pressure, only carry out under normal temperature, atmospheric pressure state, therefore, there is the advantage that simple, all raw material for the treatment of process is few and processing cost is lower; Electric energy is again clean energy, therefore can not cause new pollution to environment.Checking shows, the time that the present invention disposes the aniline category matter in waste water from dyestuff is also shorter, checking more shows, the present invention not only has higher aniline category matter clearance, and the COD concentration that can also reduce in waste water from dyestuff---although COD concentration not yet reaches emission standard, but because the present invention can guarantee to dispose more up hill and dale contained aniline category matter in waste water from dyestuff, also just for a rear step, condition is eaily provided to other organic process various---when the time comes, neither need to go again to pay close attention to (to save corresponding technique to the process of aniline category matter, some chemical reagent and the time that may extend), chemical reagent and respective handling time can be saved again for the final COD concentration that reduces.
Below in conjunction with embodiment, the present invention is further illustrated.
Embodiment
The method of aniline category matter in dye wastewater treatment, the method has the following steps:
1. be that the waste water from dyestuff of 80 ~ 600mg/L pumps in electrolyzer by aniline category matter concentration, simultaneously according to iron powder: the proportioning of waste water from dyestuff=60 ~ 230g: 125L adds technical grade iron (Fe) powder;
2. cause described iron powder fully to mix in waste water from dyestuff by pneumatic blending mode, adjust ph is 8 ~ 9 simultaneously;
3. under the state of maintenance pneumatic blending, to electrolyzer make pulse power supply to carry out electrolysis; Wherein, the battery lead plate spacing in electrolyzer is 3 ~ 4cm, and the dutycycle of pulsed current is 30% ~ 70%, current density is 400 ~ 900A/m
2;
4., after the aniline category matter concentration treating in waste water from dyestuff reaches below 5mg/L, flowed in settling tank by processed waste water from dyestuff and clarify, namely in waste water from dyestuff, aniline category matter remaining quantity meets emission standard.
Further, for obtaining reliable treatment effect, the anode in described electrolyzer is Graphite Electrodes, and negative electrode is stainless steel electrode.
The present invention have passed verification experimental verification, and testing sequence is identical with described in this embodiment, and testing waste water from dyestuff used is provided by chemical plant, Chongqing.During checking, use N-(1-naphthyl respectively) quadrol azo spectrophotometry (GB11889-89) and dichromate titration (GB11914-89) measure aniline category matter concentration before and after several groups of dye wastewater treatment and COD value, and be calculated as follows out aniline category matter clearance and the COD clearance of reaction treatment effect:
Aniline category matter clearance=［ (the aniline category matter numerical value of waste water from dyestuff initial aniline class material numerical value-process rear solution)/waste water from dyestuff initial aniline class material numerical value ］ × 100%
COD clearance=［ (COD value of waste water from dyestuff initial COD value-process rear solution) the initial COD value of/waste water from dyestuff ］ × 100%
The result sees the following form (in checking example, wastewater flow rate is 125L):
| Checking example | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Current density (A/m 2） | 900 | 900 | 900 | 400 | 700 | 700 | 700 |
| Fe powder amount (g) | 60 | 60 | 160 | 80 | 70 | 70 | 230 |
| Dutycycle (%) | 50 | 50 | 50 | 70 | 30 | 30 | 70 |
| pH | 9 | 9 | 9 | 8 | 8 | 8 | 9 |
| Battery lead plate spacing (cm) | 4 | 3 | 3 | 3 | 4 | 3 | 3 |
| Treatment time (min) | 120 | 90 | 90 | 120 | 120 | 90 | 120 |
| Aniline category matter concentration (mg/L) before process | 127.47 | 104.22 | 376.67 | 189.95 | 104.22 | 104.22 | 598.51 |
| Aniline category matter concentration (mg/L) after process | 2.97 | 0.66 | 2.64 | 4.93 | 3.75 | 4.01 | 3.69 |
| Aniline category matter clearance (%) | 97.67 | 99.37 | 99.30 | 97.40 | 96.40 | 96.15 | 99.38 |
| COD concentration (mg/L) before process | 1088.64 | 1687.68 | 1994.50 | 1795.08 | 1687.68 | 1687.68 | 2579.41 |
| COD concentration (mg/L) after process | 665.28 | 1139.18 | 1409.25 | 1375.11 | 1158.9 | 1201.35 | 1879.55 |
| COD clearance (%) | 38.90 | 32.50 | 29.34 | 23.40 | 31.33 | 28.82 | 27.13 |
As can be seen from above-mentioned checking example, the inventive method is adopted to have effect extremely reliably for the process of the aniline category matter in especially unmanageable waste water from dyestuff, even if the 4.93mg/L(that the aniline category matter concentration after process is the highest verifies example 4), also lower than the emission standard of A, B grade (5mg/L) in " sewage enters town sewer water quality standard (CJ343-2010) "; (the checking example 2,3) that have is also lower than the emission standard of the C grade (2mg/L) in this standard.In addition, COD concentration also decrease to some degree.That is, the present invention reliably can not only process the aniline category matter in especially unmanageable waste water from dyestuff, but also saves chemical reagent and respective handling time for finally reducing COD concentration.
Claims (2)
1. the method for aniline category matter in dye wastewater treatment, is characterized in that the method has the following steps:
1. be that the waste water from dyestuff of 80 ~ 600mg/L pumps in electrolyzer by aniline category matter concentration, simultaneously according to iron powder: the proportioning of waste water from dyestuff=60 ~ 230g: 125L adds technical grade iron powder;
2. cause described iron powder fully to mix in waste water from dyestuff by pneumatic blending mode, adjust ph is 8 ~ 9 simultaneously;
3. under the state of maintenance pneumatic blending, to electrolyzer make pulse power supply to carry out electrolysis; Wherein, the battery lead plate spacing in electrolyzer is 3 ~ 4cm, and the dutycycle of pulsed current is 30% ~ 70%, current density is 400 ~ 900A/m
2;
4., after the aniline category matter concentration treating in waste water from dyestuff reaches below 5mg/L, flowed in settling tank by processed waste water from dyestuff and clarify, namely in waste water from dyestuff, aniline category matter remaining quantity meets emission standard.
2. the method for aniline category matter in dye wastewater treatment according to claim 1, it is characterized in that, the anode in described electrolyzer is Graphite Electrodes, and negative electrode is stainless steel electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510966781.4A CN105540752A (en) | 2015-12-22 | 2015-12-22 | Method for treating aniline substances in dye wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510966781.4A CN105540752A (en) | 2015-12-22 | 2015-12-22 | Method for treating aniline substances in dye wastewater |
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| Publication Number | Publication Date |
|---|---|
| CN105540752A true CN105540752A (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510966781.4A Pending CN105540752A (en) | 2015-12-22 | 2015-12-22 | Method for treating aniline substances in dye wastewater |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6274028B1 (en) * | 1999-04-23 | 2001-08-14 | Clyde Kuen-Hua Hu | Electrolytic wastewater treatment method and apparatus |
| CN1994907A (en) * | 2006-11-28 | 2007-07-11 | 北京科技大学 | Method for quick electrolysis and degradation of phenylamine |
| CN102060355A (en) * | 2010-11-11 | 2011-05-18 | 华南理工大学 | Method for processing heavy-metal complexed wastewater through Fenton reinforced iron-chip internal electrolysis process |
| CN102070230A (en) * | 2010-12-10 | 2011-05-25 | 华中师范大学 | Method for removing organic matters in water by utilizing three-dimensional electrode electro-fenton and device thereof |
| CN102276023A (en) * | 2011-06-21 | 2011-12-14 | 舒振华 | Method for treating organic dyestuff in wastewater |
| CN102701496A (en) * | 2012-06-25 | 2012-10-03 | 杨德敏 | Method and process for treating high-concentration organic wastewater difficult to degrade |
| CN102942243A (en) * | 2012-11-08 | 2013-02-27 | 沈阳建筑大学 | Wastewater treatment method combining three-dimensional electrode and electric Fenton |
| CN103086485A (en) * | 2011-10-27 | 2013-05-08 | 岳军堂 | Dye wastewater decoloration process |
-
2015
- 2015-12-22 CN CN201510966781.4A patent/CN105540752A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6274028B1 (en) * | 1999-04-23 | 2001-08-14 | Clyde Kuen-Hua Hu | Electrolytic wastewater treatment method and apparatus |
| CN1994907A (en) * | 2006-11-28 | 2007-07-11 | 北京科技大学 | Method for quick electrolysis and degradation of phenylamine |
| CN102060355A (en) * | 2010-11-11 | 2011-05-18 | 华南理工大学 | Method for processing heavy-metal complexed wastewater through Fenton reinforced iron-chip internal electrolysis process |
| CN102070230A (en) * | 2010-12-10 | 2011-05-25 | 华中师范大学 | Method for removing organic matters in water by utilizing three-dimensional electrode electro-fenton and device thereof |
| CN102276023A (en) * | 2011-06-21 | 2011-12-14 | 舒振华 | Method for treating organic dyestuff in wastewater |
| CN103086485A (en) * | 2011-10-27 | 2013-05-08 | 岳军堂 | Dye wastewater decoloration process |
| CN102701496A (en) * | 2012-06-25 | 2012-10-03 | 杨德敏 | Method and process for treating high-concentration organic wastewater difficult to degrade |
| CN102942243A (en) * | 2012-11-08 | 2013-02-27 | 沈阳建筑大学 | Wastewater treatment method combining three-dimensional electrode and electric Fenton |
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Application publication date: 20160504 |