CN106396183A - Printing and dyeing industry alkali-minimization wastewater ozone oxidation-flocculation-diatomite adsorption treatment technology - Google Patents

Printing and dyeing industry alkali-minimization wastewater ozone oxidation-flocculation-diatomite adsorption treatment technology Download PDF

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Publication number
CN106396183A
CN106396183A CN201611011885.0A CN201611011885A CN106396183A CN 106396183 A CN106396183 A CN 106396183A CN 201611011885 A CN201611011885 A CN 201611011885A CN 106396183 A CN106396183 A CN 106396183A
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CN
China
Prior art keywords
ozone oxidation
waste water
treatment
flocculation
alkali
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CN201611011885.0A
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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 CN201611011885.0A priority Critical patent/CN106396183A/en
Publication of CN106396183A publication Critical patent/CN106396183A/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
    • 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
    • C02F1/281Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • 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
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • 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
    • C02F2101/30Organic compounds
    • C02F2101/308Dyes; Colorants; Fluorescent agents
    • 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
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/30Nature of the water, waste water, sewage or sludge to be treated from the textile industry
    • 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 a printing and dyeing industry alkali-minimization wastewater ozone oxidation-flocculation-diatomite adsorption treatment technology. The technology comprises the following steps: 1, pre-treating alkali-minimization wastewater, and recovering terephthalic acid and salts thereof; 2, introducing the pretreated wastewater to ozone oxidation treatment; 3, adding a soluble ferric salt to the ozone oxidation treated sewage to carry out flocculation precipitation treatment; and 4, introducing precipitated wastewater to a diatomite adsorption device, and carrying out adsorption treatment to obtain purified water. The treatment technology can effectively remove ketones, alcohols, organic amines, benzene series, thiophene and parts of organic esters from water, and can be continuously carried out for half a year to make the COD removal rate keep at 96-99%, the chroma removal rate keep at 97-99.9% and the ammonia nitrogen removal rate keep at 93-98%.

Description

A kind of dyeing alkali decrement waste water ozone oxidation-flocculation-kieselguhr adsorption is processed Technique
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-wadding Solidifying-kieselguhr adsorption 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 process, 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 (PET) macromolecular of PET fiber surface under the conditions of temperature, break Split and be even fractured into some terephthalic acid (TPA)s and ethylene glycol small molecule for hot water solubility's condensation polymer.These soluble hydrolysates 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.
Terephthalic acid (TPA) (the Terephthalic that major pollutants in alkali decrement waste water produce for dacron polyester hydrolysis Acid, TA) and ethylene glycol (Ethylene Glycol, EG).Because terephthalic acid (TPA) is in pH>In 12 alkaline waste water, its acid group from Son is reacted with the sodium ion of NaOH again, and therefore, hydrolysate 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, terephthalic acid (TPA) (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 matter, 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 at a kind of dyeing alkali decrement waste water ozone oxidation-flocculation-kieselguhr adsorption Science and engineering skill, 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-flocculation-kieselguhr adsorption handling process, it includes:
(1) pre-process alkali decrement waste water, reclaim terephthalic acid (TPA) 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 flocculation sediment process;
(4) after precipitating, waste water is passed through kieselguhr adsorption equipment, carries out adsorption treatment, is purified water.
After the present invention is using pretreatment, by ozone Oxidation Treatment, dispose residual finally by kieselguhr adsorption equipment Colourity, hardly degraded organic substance and the biological metabolic product (as larger molecular organicses such as polysaccharide, protein) such as COD.
The present invention is precipitated after ozone Oxidation Treatment, and then combines kieselguhr adsorption, whole flow process process is simple, 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 terephthalic acid (TPA) and its salt, not only saves cost, also reduces follow-up place The load of science and engineering skill.
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 reed, float The plants such as duckweed, lotus rhizome, described purified water slowly flows 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-flocculation-kieselguhr adsorption handling process, it includes:
(1) pre-process alkali decrement waste water, reclaim terephthalic acid (TPA) 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 flocculation sediment process;
(4) after precipitating, waste water is passed through kieselguhr adsorption equipment, carries out adsorption treatment, is purified water.
Embodiment 2
A kind of dyeing alkali decrement waste water ozone oxidation-flocculation-kieselguhr adsorption handling process, it includes:
(1) pre-process alkali decrement waste water, reclaim terephthalic acid (TPA) 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 flocculation sediment process;
(4) after precipitating, waste water is passed through kieselguhr adsorption equipment, carries out adsorption treatment, 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 reed, float The plants such as duckweed, lotus rhizome, described purified water slowly flows 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-flocculation-kieselguhr adsorption handling process, it includes:
(1) pre-process alkali decrement waste water, reclaim terephthalic acid (TPA) 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 flocculation sediment process;
(4) after precipitating, waste water is passed through kieselguhr adsorption equipment, carries out adsorption treatment, is purified water.
2. dyeing alkali decrement waste water anaerobic-aerobic-precipitation-kieselguhr adsorption handling process as claimed in claim 1, its It is characterised by, carry out after step (4):
(5) purified water obtaining kieselguhr adsorption equipment is passed through plant treatment pond and is purified.
CN201611011885.0A 2016-11-17 2016-11-17 Printing and dyeing industry alkali-minimization wastewater ozone oxidation-flocculation-diatomite adsorption treatment technology CN106396183A (en)

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CN106396183A true CN106396183A (en) 2017-02-15

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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: 20170215