CN106348497A - Ozone oxidization-precipitation-sand filtering-iron powder filtering treatment process for alkali-minimization wastewater in printing and dyeing industry - Google Patents
Ozone oxidization-precipitation-sand filtering-iron powder filtering treatment process for alkali-minimization wastewater in printing and dyeing industry Download PDFInfo
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- CN106348497A CN106348497A CN201611011677.0A CN201611011677A CN106348497A CN 106348497 A CN106348497 A CN 106348497A CN 201611011677 A CN201611011677 A CN 201611011677A CN 106348497 A CN106348497 A CN 106348497A
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- Prior art keywords
- waste water
- treatment
- iron powder
- precipitation
- alkali
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Classifications
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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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
-
- 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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
Abstract
The invention discloses an ozone oxidization-precipitation-sand filtering-iron powder filtering treatment process for alkali-minimization wastewater in the printing and dyeing industry. The treatment process comprises the following steps: (1) pretreating the alkali-minimization wastewater, and recovering terephthalic acid and a salt thereof; (2)introducing ozone into the pretreated wastewater to perform oxidization treatment; (3) adding a soluble ferric salt into sewage treated by ozone oxidization to perform precipitation treatment; (4) introducing the precipitated wastewater into sand filtering equipment to perform filtering treatment; (5) introducing the sand-filtered wastewater into iron powder filtering equipment to obtain purified water. By adopting the treatment process, ketones, alcohols, organic amine, benzene series, thiophene and a part of organic esters in water can be removed effectively. After continuous running for half a year, the COD (Chemical Oxygen Demand) removal rate is kept at 96 to 99 percent, the chromaticity removal rate is 97 to 99.9 percent, and the amine-nitrogen removal rate is kept at 93 to 98 percent.
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 ozone oxidation-heavy
Shallow lake-sand filtration-iron powder filtration treatment technique.
Background technology
Printing and dyeing are the traditional feature industries of China, quickly grow in Jiangsu, Zhejiang, Guangdong and coastal area in recent years,
But the pollution problem that dyeing waste water causes shows day prominent 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
Share in piece market for the terylene chemical fibre is continuously increased in recent years, and China's terylene yield is 101.5 within 1991
Ten thousand tons, reach 6,950,000 tons in November, 2002 China's terylene yield.And imitated real silk terylene chemical fibre is to compare 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 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, to produce substantial amounts of Alkali Weight Reduction Treatment of Polyester waste water, be controlling of traditional dyeing waste water again
Reason brings new problem.
Alkali Weight Reduction Treatment of Polyester technology refers in terylene blank before entering dyeing process, using strong alkali as a catalyst, in height
Make the ester group hydrolyses reaction in polyester (polyethylene terephthalate) macromole of PET fiber surface under the conditions of temperature, break
Split and be even fractured into some p-phthalic acids and ethylene glycol small molecule for hot water solubility's condensation polymer.These solubility hydrolyzate
Condensation polymer separates out from fiber surface in water-washing process, is dissolved in the water and makes fiber decrement.Because outer layer fiber is by caustic corrosion, wash
Synthetic fibre fiber attenuates after subtracting, deliquescing, creates 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 waste water.
P-phthalic acid (the terephthalic that major pollutants in alkali decrement waste water produce for dacron polyester hydrolysis
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 is reacted with the sodium ion of sodium hydroxide again, and 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% about, in other words, often give birth to by amount of hydrolysis
Produce l kg terylene blank, just have 3.5%～30% terylene to dissolve in water after being hydrolyzed, 1kg polyster fibre will produce in theory
The cod of raw 1.09kg, after decrement, per kilogram terylene blank will produce 38.2g～327g cod.Typically every myriametre terylene is through alkali
After decrement treatment, discharge 30-50 ton alkali decrement waste water, 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's application Alkali reduction technology, make pva slurry, p-phthalic acid (ta or its sodium salt), dyestuff, New-type adjuvant
Enter dyeing waste water in a large number Deng benzene series, naphthalene system, anthraquinone system and aniline, nitrobenzene bio-refractory Organic substance, produce highly concentrated
Degree, high alkalinity, the printing and dyeing-alkali decrement waste water of difficult degradation.Polyster fibre can not be substituted, the generation of alkali decrement waste water and improvement
It is necessary, be also long-term.Therefore develop a kind of cost-effective dyeing water treatment technology, especially alkali decrement waste water
Treatment process, oneself through become current environmental protection industry (epi) must faced by severe problem.
Content of the invention
It is an object of the invention to propose a kind of dyeing alkali decrement waste water ozone oxidation-precipitation-sand filtration-iron powder filtering
Handling process, is capable of the alkali decrement waste water of effective process dyeing generation.
For reaching this purpose, the present invention employs the following technical solutions:
A kind of dyeing alkali decrement waste water ozone oxidation-precipitation-sand filtration-iron powder filtration treatment technique, comprising:
(1) pretreatment alkali decrement waste water, reclaims p-phthalic acid and its salt；
(2) waste water after pretreatment is gone to be passed through ozone Oxidation Treatment by described；
(3) soluble ferric iron salt will be added in the sewage of described ozone Oxidation Treatment to carry out precipitation process；
(4) after precipitating, waste water is passed through sand filtration apparatus, carries out filtration treatment；
(5) waste water after sand filtration is passed through iron powder filter plant, is purified water.
The employing iron powder of novelty of the present invention, as adsorbing medium, replaces activated carbon used widely in the art or diatom
Soil.Domestic metallurgy industry compression production capacity pressure is larger at present, and iron powder price drastically drops, and leads to whole industry depressed.This
The adsorbing mediums such as the bright activated carbon being used as adsorbing medium, the replacement industry using the iron powder overstocking process at present, are subtracted significantly
Lack the cost of pollution administration.
After the present invention adopts pretreatment, by ozone oxidation by partial organic substances oxidation Decomposition therein, finally by sand
Filter, iron powder adsorption equipment dispose the hardly degraded organic substances such as the colourity of residual, cod and biological metabolic product (as polysaccharide, egg
The larger molecular organicses such as white matter).
The present invention is precipitated after ozone Oxidation Treatment, and then combines sand filtration and iron powder filtration, whole flow process technique
Simply, investment is little, processes depth greatly it may be difficult to the comparison of the process such as colourity processing is clean.
Technique of the present invention first carries out p-phthalic acid and its salt, not only saves cost, also reduces follow-up place
The load of science and engineering skill.
Preferably, carry out after step (5):
(6) purified water obtaining is passed through plant treatment pond to be purified.Plant in described plant treatment pond and be implanted with phragmites communiss, float
The plants such as duckweed, Rhizoma Nelumbiniss, described purified water sluggish flow in described plant treatment pond, precipitates further and carries out plant purification.
Handling process of the present invention, can effectively go ketone in eliminating water, alcohols, organic amine, benzene homologues, thiophene and
Part organic ester, continuously ran through half a year, cod clearance was maintained at 96-99%, chroma removal rate 97-99.9%, ammonia nitrogen goes
Except rate is maintained at 93-98%.
Specific embodiment
To further illustrate technical scheme below by specific embodiment.
Embodiment 1
A kind of dyeing alkali decrement waste water ozone oxidation-precipitation-sand filtration-iron powder filtration treatment technique, comprising:
(1) pretreatment alkali decrement waste water, reclaims p-phthalic acid and its salt；
(2) waste water after pretreatment is gone to be passed through ozone Oxidation Treatment by described；
(3) soluble ferric iron salt will be added in the sewage of described ozone Oxidation Treatment to carry out precipitation process；
(4) after precipitating, waste water is passed through sand filtration apparatus, carries out filtration treatment；
(5) waste water after sand filtration is passed through iron powder filter plant, is purified water.
Embodiment 2
A kind of dyeing alkali decrement waste water ozone oxidation-precipitation-sand filtration-iron powder filtration treatment technique, comprising:
(1) pretreatment alkali decrement waste water, reclaims p-phthalic acid and its salt；
(2) waste water after pretreatment is gone to be passed through ozone Oxidation Treatment by described；
(3) soluble ferric iron salt will be added in the sewage of described ozone Oxidation Treatment to carry out precipitation process；
(4) after precipitating, waste water is passed through sand filtration apparatus, carries out filtration treatment；
(5) waste water after sand filtration is passed through iron powder filter plant, is purified water.
(6) purified water obtaining is passed through plant treatment pond to be purified.Plant in described plant treatment pond and be implanted with phragmites communiss, float
The plants such as duckweed, Rhizoma Nelumbiniss, described purified water sluggish flow in described plant treatment pond, precipitates further and carries out plant purification.
Continuously run through half a year, cod clearance is maintained at 95-99%, chroma removal rate 91-96%, ammonia nitrogen removal frank
It is maintained at 90-97%.
Continuously run through half a year, the technique of embodiment 1 and 2 is maintained at 96-99%, chroma removal rate 97- to cod clearance
99.9%, ammonia nitrogen removal frank is maintained at 93-98%.
Claims (2)
1. a kind of dyeing alkali decrement waste water ozone oxidation-precipitation-sand filtration-iron powder filtration treatment technique, comprising:
(1) pretreatment alkali decrement waste water, reclaims p-phthalic acid and its salt；
(2) waste water after pretreatment is gone to be passed through ozone Oxidation Treatment by described；
(3) soluble ferric iron salt will be added in the sewage of described ozone Oxidation Treatment to carry out precipitation process；
(4) after precipitating, waste water is passed through sand filtration apparatus, carries out filtration treatment；
(5) waste water after sand filtration is passed through iron powder filter plant, is purified water.
2. dyeing alkali decrement waste water ozone oxidation-precipitation-sand filtration-iron powder filtration treatment technique as claimed in claim 1,
It is characterized in that, carry out after step (5):
(6) purified water obtaining is passed through plant treatment pond to be purified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611011677.0A CN106348497A (en) | 2016-11-17 | 2016-11-17 | Ozone oxidization-precipitation-sand filtering-iron powder filtering treatment process for alkali-minimization wastewater in printing and dyeing industry |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611011677.0A CN106348497A (en) | 2016-11-17 | 2016-11-17 | Ozone oxidization-precipitation-sand filtering-iron powder filtering treatment process for alkali-minimization wastewater in printing and dyeing industry |
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| Publication Number | Publication Date |
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| CN106348497A true CN106348497A (en) | 2017-01-25 |
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| CN201611011677.0A Pending CN106348497A (en) | 2016-11-17 | 2016-11-17 | Ozone oxidization-precipitation-sand filtering-iron powder filtering treatment process for alkali-minimization wastewater in printing and dyeing industry |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101244857A (en) * | 2007-02-12 | 2008-08-20 | 陈定良 | Alkali deweighting wastewater processing method and device |
| CN101538107A (en) * | 2009-05-12 | 2009-09-23 | 青岛银河环保股份有限公司 | Method for treating wastewater in textile printing and dyeing industry |
| CN104926018A (en) * | 2015-05-14 | 2015-09-23 | 宁波沐德环境科技有限公司 | Resourceful treatment process for alkali-minimization waste water |
-
2016
- 2016-11-17 CN CN201611011677.0A patent/CN106348497A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101244857A (en) * | 2007-02-12 | 2008-08-20 | 陈定良 | Alkali deweighting wastewater processing method and device |
| CN101538107A (en) * | 2009-05-12 | 2009-09-23 | 青岛银河环保股份有限公司 | Method for treating wastewater in textile printing and dyeing industry |
| CN104926018A (en) * | 2015-05-14 | 2015-09-23 | 宁波沐德环境科技有限公司 | Resourceful treatment process for alkali-minimization waste water |
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