CN106630382A - Treatment technology of alkaline-reduced wastewater in dyeing and printing industry - Google Patents
Treatment technology of alkaline-reduced wastewater in dyeing and printing industry Download PDFInfo
- Publication number
- CN106630382A CN106630382A CN201611011482.6A CN201611011482A CN106630382A CN 106630382 A CN106630382 A CN 106630382A CN 201611011482 A CN201611011482 A CN 201611011482A CN 106630382 A CN106630382 A CN 106630382A
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- waste water
- wastewater
- water
- dyeing
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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
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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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
- 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
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic 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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
Abstract
The invention discloses a treatment technology of alkaline-reduced wastewater in dyeing and printing industry. The treatment technology comprises the following steps of (1) sending the alkaline-reduced wastewater into sand filtering equipment, so as to obtain particle-removed wastewater; (2) sending the particle-removed wastewater into an anaerobic zone, and hydrolyzing refractory long-chain macromolecules in the wastewater into short-chain micromolecule organic matter by exoenzyme secreted by anaerobic bacteria; (3) sending the wastewater subjected to anaerobic treatment into an aerobic zone, degrading by aerobic bacteria, and decomposing the organic matter into CO2 (carbon dioxide) and water; (4) sending the sewage treated by the aerobic zone into nanofiltration equipment, so as to obtain purified water. The treatment technology has the advantages that the synergistic actions of biological degrading and ultrafiltration are realized, and the acetones, alcohols, organic amines, benzene series, thiophene and part of organic esters in water are removed; after continuous running for half a year, the removal rate of COD (chemical oxygen demand) is maintain to 92 to 97%, the removal rate of chroma is 87 to 91%, and the removal rate of ammonia and nitrogen is 87 to 94%.
Description
Technical field
The present invention relates to technical field of waste water processing, more particularly to a kind of dyeing alkali decrement waste water handling process.
Background technology
Printing and dyeing are the traditional feature industries of China, are quickly grown in Jiangsu, Zhejiang, Guangdong and coastal area in recent years,
But the pollution problem that dyeing waste water is caused shows and projects day also with the expansion of industry size.Dyeing is industrial wastewater discharge
Rich and influential family, according to incompletely statistics, the daily discharge capacity of China's dyeing waste water is about 3 × 106～4 × 106m3。
In recent years share of the terylene chemical fibre in piece market is continuously increased, and China's terylene yield is 101.5 within 1991
Ten thousand tons, in November, 2002 China's terylene yield 6,950,000 tons are reached.And imitated real silk terylene chemical fibre is compared on the market of home and abroad
Popular chemical fabric, imitated real silk terylene chemical fibre is the dacron silk fabrics that chemical fibre is formed Jing after Alkali reduction fibre modification, and its style is forced
Nearly silk broadcloth, wearability is better than silk broadcloth again, and Productio of Polyester Silk heat in the market is also lasting.Terylene artificial silk exists
Need in the course of processing using Alkali reduction technology, produce substantial amounts of Alkali Weight Reduction Treatment of Polyester waste water, and controlling for traditional dyeing waste water
Reason brings new problem.
Alkali Weight Reduction Treatment of Polyester technology is referred in terylene blank before into dyeing process, using strong alkali as a catalyst, in height
React the ester group hydrolyses in polyester (polyethylene terephthalate) macromole of PET fiber surface under the conditions of temperature, break
Split for hot water solubility's condensation polymer or even be fractured into some p-phthalic acids and ethylene glycol small molecule.These solubility hydrolyzate
Condensation polymer is separated out in water-washing process from fiber surface, and being dissolved in the water makes fiber decrement.Because outer layer fiber is by caustic corrosion, wash
Synthetic fibre fiber attenuates after subtracting, softens, and generates the soft feel as real silk and elegant sense, but also brings while terylene decrement
High concentration, high alkalinity, the organic wastewater-alkali of difficult degradation subtract most waste water.
Major pollutants in alkali decrement waste water are that dacron polyester hydrolyzes the p-phthalic acid (Terephthalic for producing
Acid, TA) and ethylene glycol (Ethylene Glycol, EG).Because p-phthalic acid is in pH>In 12 alkaline waste water, its acid group from
Son reacts with the sodium ion of sodium hydroxide again, therefore, hydrolyzate is gone out in the form of organic salt para-phthalic sodium (DT)
Now in waste water.Terylene blank in Silk processing procedure, typically 3.5%～30% or so, in other words, often give birth to by amount of hydrolysis
L kg terylene blanks are produced, just has 3.5%～30% terylene to dissolve in water after being hydrolyzed, in theory 1kg polyster fibres will be produced
The COD of raw 1.09kg, per kilogram terylene blank will produce 38.2g～327g COD Jing after decrement.General every myriametre terylene Jing alkali
After decrement treatment, 30-50 ton alkali decrement waste waters are discharged, COD is up to more than 20000mg/L, pH>12.Alkali subtracts the pollution of scape waste water
Problem is very prominent.
And printing and dyeing mill applies Alkali reduction technology, PVA slurries, p-phthalic acid (TA or its sodium salt), dyestuff, New-type adjuvant are made
Dyeing waste water is entered in a large number Deng benzene series, naphthalene system, anthraquinone system and aniline, nitrobenzene bio-refractory Organic substance, is produced highly concentrated
Degree, high alkalinity, the printing and dyeing-alkali decrement waste water of difficult degradation.Polyster fibre can not be substituted, generation and the improvement of alkali decrement waste water
It is necessary, is also long-term.Therefore a kind of cost-effective dyeing water treatment technology is developed, especially alkali decrement waste water
Treatment process, own Jing becomes the severe problem that current environmental protection industry (epi) must be faced.
The content of the invention
It is an object of the invention to a kind of dyeing alkali decrement waste water handling process is proposed, being capable of effective process printing and dyeing row
The alkali decrement waste water that industry is produced.
It is that, up to this purpose, the present invention is employed the following technical solutions：
A kind of dyeing alkali decrement waste water handling process, it includes：
(1) alkali decrement waste water is passed through into sand filtration apparatus, obtains removing the waste water after microgranule；
(2) waste water after the removal microgranule is passed through into anaerobism section, the difficult degradation long-chain macromolecule in waste water is in anaerobic bacteria
The exoenzyme of secretion is hydrolyzed to short chain small organic molecule；
(3) waste water of anaerobic treatment is passed through into aerobic section, Organic substance is decomposed generation CO by the degraded of Jing aerobic bacterias2And water；
(4) sewage of aerobic section process is passed through into nanofiltration equipment, is purified water.
The present invention is gone out the disposable pollutant such as bulky grain, float using sand filtration apparatus, and then is become reconciled by anaerobism section
Oxygen section removes partial organic substances therein, and finally by nanofiltration equipment the hardly degraded organic substances such as colourity, the COD of residual are disposed
And biological metabolic product (such as polysaccharide, protein larger molecular organicses).
Sand filtration apparatus of the present invention have backwash module, can rinse regeneration filter sand with water.
Nanofiltration equipment of the present invention, it is known device, is that a kind of pressure between reverse osmosiss and ultrafiltration drives
Dynamic membrane separation plant, the pore diameter range of NF membrane is in several rans.NF membrane adopts CA, CTA film, aramid composite
Film and sulfonated polyether sulfone film etc..
Preferably, carry out after step (4)：
(5) purified water for obtaining is passed through into plant treatment pond to be purified.Plant in the plant treatment pond and be implanted with phragmites communiss, float
The plants such as duckweed, Rhizoma Nelumbiniss, purified water sluggish flow in the plant treatment pond, further precipitate and carry out plant purification.
Handling process of the present invention, it plays the synergism of biodegradation and nanofiltration, can effectively go in eliminating water
Ketone, alcohols, organic amine, benzene homologues, thiophene and part organic ester, Jing half a year is continuously run, and COD clearances are maintained at
92-97%, chroma removal rate 87-91%, ammonia nitrogen removal frank is maintained at 87-94%.
Specific embodiment
Technical scheme is further illustrated below by specific embodiment.
Embodiment 1
A kind of dyeing alkali decrement waste water handling process, it includes：
(1) alkali decrement waste water is passed through into sand filtration apparatus, obtains removing the waste water after microgranule；
(2) waste water after the removal microgranule is passed through into anaerobism section, the difficult degradation long-chain macromolecule in waste water is in anaerobic bacteria
The exoenzyme of secretion is hydrolyzed to short chain small organic molecule；The anaerobism section adopts anaerobic sludge；
(3) waste water of anaerobic treatment is passed through into aerobic section, Organic substance is decomposed generation CO by the degraded of Jing aerobic bacterias2And water；Institute
State aerobic section and adopt aerobic sludge；
(4) sewage of aerobic section process is passed through into nanofiltration equipment, is purified water.
Jing half a year is continuously run, and 92-97%, chroma removal rate 87-91%, ammonia nitrogen removal frank are maintained to COD clearances
It is maintained at 87-94%.
Embodiment 2
A kind of dyeing alkali decrement waste water handling process, it includes：
(1) alkali decrement waste water is passed through into sand filtration apparatus, obtains removing the waste water after microgranule；
(2) waste water after the removal microgranule is passed through into anaerobism section, the difficult degradation long-chain macromolecule in waste water is in anaerobic bacteria
The exoenzyme of secretion is hydrolyzed to short chain small organic molecule；The anaerobism section adopts anaerobic sludge；
(3) waste water of anaerobic treatment is passed through into aerobic section, Organic substance is decomposed generation CO by the degraded of Jing aerobic bacterias2And water；Institute
State aerobic section and adopt aerobic sludge；
(4) sewage of aerobic section process is passed through into nanofiltration equipment, is purified water；
(5) purified water for obtaining is passed through into plant treatment pond to be purified.Plant in the plant treatment pond and be implanted with phragmites communiss, float
The plants such as duckweed, Rhizoma Nelumbiniss, purified water sluggish flow in the plant treatment pond, further precipitate and carry out plant purification.
Jing half a year is continuously run, and 95-99%, chroma removal rate 91-96%, ammonia nitrogen removal frank are maintained to COD clearances
It is maintained at 90-97%.
Claims (2)
1. a kind of dyeing alkali decrement waste water handling process, it includes：
(1) alkali decrement waste water is passed through into sand filtration apparatus, obtains removing the waste water after microgranule；
(2) waste water after the removal microgranule is passed through into anaerobism section, the difficult degradation long-chain macromolecule in waste water is secreted in anaerobic bacteria
Exoenzyme be hydrolyzed to short chain small organic molecule；
(3) waste water of anaerobic treatment is passed through into aerobic section, Organic substance is decomposed generation CO by the degraded of Jing aerobic bacterias2And water；
(4) sewage of aerobic section process is passed through into nanofiltration equipment and is purified water.
2. dyeing alkali decrement waste water handling process as claimed in claim 1, it is characterised in that in the laggard of step (4)
OK：
(5) purified water that nanofiltration equipment is obtained is passed through into plant treatment pond to be purified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611011482.6A CN106630382A (en) | 2016-11-17 | 2016-11-17 | Treatment technology of alkaline-reduced wastewater in dyeing and printing industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611011482.6A CN106630382A (en) | 2016-11-17 | 2016-11-17 | Treatment technology of alkaline-reduced wastewater in dyeing and printing industry |
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| Publication Number | Publication Date |
|---|---|
| CN106630382A true CN106630382A (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611011482.6A Pending CN106630382A (en) | 2016-11-17 | 2016-11-17 | Treatment technology of alkaline-reduced wastewater in dyeing and printing industry |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1765779A (en) * | 2005-09-02 | 2006-05-03 | 浙江大学 | Printing and dyeing wastewater recovery and disposal method |
| CN101503353A (en) * | 2009-03-05 | 2009-08-12 | 浙江大学 | Technique for purifying crude terephthalic acid from alkali deweighting wastewater |
| EP2657198B1 (en) * | 2010-12-24 | 2016-01-06 | Boying Xiamen Science And Technology Co., Ltd. | Printing and dyeing wastewater treatment and reuse apparatus and method therefor |
-
2016
- 2016-11-17 CN CN201611011482.6A patent/CN106630382A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1765779A (en) * | 2005-09-02 | 2006-05-03 | 浙江大学 | Printing and dyeing wastewater recovery and disposal method |
| CN101503353A (en) * | 2009-03-05 | 2009-08-12 | 浙江大学 | Technique for purifying crude terephthalic acid from alkali deweighting wastewater |
| EP2657198B1 (en) * | 2010-12-24 | 2016-01-06 | Boying Xiamen Science And Technology Co., Ltd. | Printing and dyeing wastewater treatment and reuse apparatus and method therefor |
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Application publication date: 20170510 |