CN106336044A - Ozone oxidation-adsorption-nanofiltration treatment process for alkali-decrement wastewater in printing and dyeing industry - Google Patents

Ozone oxidation-adsorption-nanofiltration treatment process for alkali-decrement wastewater in printing and dyeing industry Download PDF

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Publication number
CN106336044A
CN106336044A CN201611011161.6A CN201611011161A CN106336044A CN 106336044 A CN106336044 A CN 106336044A CN 201611011161 A CN201611011161 A CN 201611011161A CN 106336044 A CN106336044 A CN 106336044A
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CN
China
Prior art keywords
nanofiltration
alkali
adsorption
ozone oxidation
waste water
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CN201611011161.6A
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Chinese (zh)
Inventor
张达明
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无锡明盛纺织机械有限公司
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Priority to CN201611011161.6A priority Critical patent/CN106336044A/en
Publication of CN106336044A publication Critical patent/CN106336044A/en

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42Separation; Purification; Stabilisation; Use of additives
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/442Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/78Treatment of water, waste water, or sewage by oxidation with ozone
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/16Nitrogen compounds, e.g. ammonia
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/32Hydrocarbons, e.g. oil
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/32Hydrocarbons, e.g. oil
    • C02F2101/322Volatile compounds, e.g. benzene
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/34Organic compounds containing oxygen
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/38Organic compounds containing nitrogen
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/40Organic compounds containing sulfur
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/32Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae

Abstract

The invention discloses an ozone oxidation-adsorption-nanofiltration treatment process for alkali-decrement wastewater in the printing and dyeing industry. The ozone oxidation-adsorption-nanofiltration treatment process comprises the steps that 1, alkali-decrement wastewater is pretreated, and terephthalic acid and its salt are recovered; 2, ozone is led to the pretreated wastewater to perform oxidation; 3, the sewage subjected to ozone oxidation treatment is led to an activated carbon adsorption device to perform adsorption and decoloration treatment; 4, the effluent of the activated carbon adsorption device is led to a nanofiltration device to obtain purified water. The treating process plays the synergistic effect of biodegradation and activated carbon decoloration and nanofiltration, and after continuous operation for half a year, the COD removal rate is kept to be 96-99%, the chroma removal rate is kept to be 97-99.9%, and the ammonia nitrogen removal rate is kept to be 93-98%.

Description

A kind of dyeing alkali decrement waste water ozone oxidation-absorption-nanofiltration handling process
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-suction Attached-nanofiltration handling process.
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 3 × 106~4 × 106m3.
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 proposing a kind of dyeing alkali decrement waste water ozone oxidation-absorption-nanofiltration handling process, It 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-absorption-nanofiltration handling process, comprising:
(1) pretreatment alkali decrement waste water, reclaims p-phthalic acid and its salt;
(2) sewage of pretreatment is passed through ozone to be aoxidized;
(3) sewage of described ozone Oxidation Treatment is passed through active carbon adsorption equipment, carries out adsorption bleaching process;
(4) active carbon adsorption equipment water outlet is passed through nanofiltration equipment, is purified water.
The present invention replaces bio anaerobic aerobic oxidation by ozonation technology and processes, and improves operation processing speed, Afterwards the hardly degraded organic substances such as colourity, the cod of residual and biological metabolic product are disposed (as poly by active carbon adsorption equipment The larger molecular organicses such as sugar, protein), remaining a small amount of macromolecule contaminant is removed by nanofiltration equipment, thus being purified water.
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.
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 ran.NF membrane adopts ca, cta film, aramid composite Film and sulfonated polyether sulfone film etc..
Preferably, carry out after step (4):
(5) 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, it plays the synergism of biodegradation, activated carbon decolorizing and nanofiltration, can be effective Remove ketone in eliminating water, alcohols, organic amine, benzene homologues, thiophene and part organic ester, continuously run through half a year, cod is removed Rate is maintained at 96-99%, chroma removal rate 97-99.9%, and ammonia nitrogen removal frank 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-absorption-nanofiltration handling process, comprising:
(1) pretreatment alkali decrement waste water, reclaims p-phthalic acid and its salt;
(2) sewage of pretreatment is passed through ozone to be aoxidized;
(3) sewage of described ozone Oxidation Treatment is passed through active carbon adsorption equipment, carries out adsorption bleaching process;
(4) active carbon adsorption equipment water outlet is passed through nanofiltration equipment, is purified water.
Embodiment 2
A kind of dyeing alkali decrement waste water ozone oxidation-absorption-nanofiltration handling process, comprising:
(1) pretreatment alkali decrement waste water, reclaims p-phthalic acid and its salt;
(2) sewage of pretreatment is passed through ozone to be aoxidized;
(3) sewage of described ozone Oxidation Treatment is passed through active carbon adsorption equipment, carries out adsorption bleaching process;
(4) active carbon adsorption equipment water outlet is passed through nanofiltration equipment, is purified water;
(5) 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-absorption-nanofiltration handling process, comprising:
(1) pretreatment alkali decrement waste water, reclaims p-phthalic acid and its salt;
(2) sewage of pretreatment is passed through ozone to be aoxidized;
(3) sewage of described ozone Oxidation Treatment is passed through active carbon adsorption equipment, carries out adsorption bleaching process;
(4) active carbon adsorption equipment water outlet is passed through nanofiltration equipment, is purified water.
2. dyeing alkali decrement waste water ozone oxidation-absorption-nanofiltration handling process as claimed in claim 1, its feature exists In carrying out after step (4):
(5) purified water obtaining nanofiltration equipment is passed through plant treatment pond and is purified.
CN201611011161.6A 2016-11-17 2016-11-17 Ozone oxidation-adsorption-nanofiltration treatment process for alkali-decrement wastewater in printing and dyeing industry CN106336044A (en)

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Application Number Priority Date Filing Date Title
CN201611011161.6A CN106336044A (en) 2016-11-17 2016-11-17 Ozone oxidation-adsorption-nanofiltration treatment process for alkali-decrement wastewater in printing and dyeing industry

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Application Number Priority Date Filing Date Title
CN201611011161.6A CN106336044A (en) 2016-11-17 2016-11-17 Ozone oxidation-adsorption-nanofiltration treatment process for alkali-decrement wastewater in printing and dyeing industry

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
CN105540967A (en) * 2015-12-09 2016-05-04 大唐国际化工技术研究院有限公司 Processing method for reducing and recycling organic waste water and processing system
CN105645681A (en) * 2016-01-11 2016-06-08 常州大学 Dyeing wastewater advanced treatment device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
CN105540967A (en) * 2015-12-09 2016-05-04 大唐国际化工技术研究院有限公司 Processing method for reducing and recycling organic waste water and processing system
CN105645681A (en) * 2016-01-11 2016-06-08 常州大学 Dyeing wastewater advanced treatment device

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Application publication date: 20170118