CN106430838A - Process for treatment of alkali-minimization wastewater in printing and dyeing industry - Google Patents
Process for treatment of alkali-minimization wastewater in printing and dyeing industry Download PDFInfo
- Publication number
- CN106430838A CN106430838A CN201611011202.1A CN201611011202A CN106430838A CN 106430838 A CN106430838 A CN 106430838A CN 201611011202 A CN201611011202 A CN 201611011202A CN 106430838 A CN106430838 A CN 106430838A
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- Prior art keywords
- waste water
- wastewater
- activated carbon
- water
- 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
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
-
- 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
-
- 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 process for treatment of alkali-minimization wastewater in the printing and dyeing industry. The process comprises the following steps: (1) introducing alkali-minimization wastewater into sand filtration equipment to obtain wastewater without particulates; (2) introducing the wastewater without the particulates into an anaerobic section to hydrolyze refractory long-chain macromolecules in the wastewater into short-chain micromolecule organic matters by extracellular enzymes secreted by anaerobic bacteria; (3) introducing the wastewater after anaerobic treatment into an aerobic section to degrade the organic matters by aerobic bacteria so as to generate CO2 and water; and (4) introducing the wastewater treated in the aerobic section into the bottom of a biological activated carbon device, wherein the biological activated carbon device is filled with activated carbon and activated sludge, and purified water is obtained at the top of the device. The treatment process provided by the invention gives play to a synergistic action of activated carbon adsorption and biodegradation, can effectively remove ketone, alcohols, organic amine, benzene series, thiophene and part of organic esters in water, and after continuous operation for half a year, the removal rate of COD (chemical oxygen demand) is kept at 92-97%, the chroma removal rate is kept at 87-91%, and the ammonia nitrogen removal rate is kept at 87-94%.
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, 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 handling process, being capable of effective process printing and dyeing row
The alkali decrement waste water that industry produces.
For reaching this purpose, the present invention employs the following technical solutions：
A kind of dyeing alkali decrement waste water handling process, it includes：
(1) alkali decrement waste water is passed through sand filtration apparatus, obtains the waste water after removing microgranule；
(2) waste water after described removal microgranule is passed through 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 aerobic section, through aerobic bacteria degraded, Organic substance is decomposed and produce CO2And water；
(4) sewage processing described aerobic section is passed through biological activated carbon bottom of device, and described biological activated carbon device is filled out
It is filled with activated carbon and activated sludge, top 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
Partial organic substances therein are removed by oxygen section, dispose the difficult degradations such as colourity, the COD of residual finally by biological activated carbon device
Organic substance and biological metabolic product (as larger molecular organicses such as polysaccharide, protein).
Sand filtration apparatus of the present invention have backwash module, can rinse regeneration filter sand with water.
Preferably, carry out after step (4)：
(5) purified water that top obtains is passed through plant treatment pond to be purified.Plant in described plant treatment pond and be implanted with reed
The plants such as reed, Herba Spirodelae, Rhizoma Nelumbiniss, described purified water sluggish flow in described plant treatment pond, precipitates further and carries out plant
Purify.
Handling process of the present invention, it plays activated carbon adsorption and biodegradable synergism, can effectively remove
Ketone in water, alcohols, organic amine, benzene homologues, thiophene and part organic ester, continuously ran through half a year, and COD clearance is protected
Hold in 92-97%, chroma removal rate 87-91%, ammonia nitrogen removal frank is maintained at 87-94%.
Specific embodiment
To further illustrate technical scheme 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 sand filtration apparatus, obtains the waste water after removing microgranule；
(2) waste water after described removal microgranule is passed through 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；Described anaerobism section adopts anaerobic sludge；
(3) waste water of anaerobic treatment is passed through aerobic section, through aerobic bacteria degraded, Organic substance is decomposed and produce CO2And water；Institute
State aerobic section and adopt aerobic sludge；
(4) sewage processing described aerobic section is passed through biological activated carbon bottom of device, and described biological activated carbon device is filled out
It is filled with activated carbon and activated sludge, top is purified water.
Continuously run through half a year, COD clearance is maintained at 92-97%, chroma removal rate 87-91%, ammonia nitrogen removal frank
It is maintained at 87-94%.
Claims (2)
1. a kind of dyeing alkali decrement waste water handling process, it includes：
(1) alkali decrement waste water is passed through sand filtration apparatus, obtains the waste water after removing microgranule；
(2) waste water after described removal microgranule is passed through 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 aerobic section, through aerobic bacteria degraded, Organic substance is decomposed and produce CO2And water；
(4) sewage processing described aerobic section is passed through biological activated carbon bottom of device, and described biological activated carbon device is filled with
Activated carbon and activated sludge, top is purified water.
2. dyeing alkali decrement waste water handling process as claimed in claim 1 is it is characterised in that laggard in step (4)
OK：
(5) purified water obtaining biological activated carbon device top is passed through plant treatment pond and is purified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611011202.1A CN106430838A (en) | 2016-11-17 | 2016-11-17 | Process for treatment of alkali-minimization wastewater in printing and dyeing industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611011202.1A CN106430838A (en) | 2016-11-17 | 2016-11-17 | Process for treatment of alkali-minimization wastewater in printing and dyeing industry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106430838A true CN106430838A (en) | 2017-02-22 |
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ID=58220017
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611011202.1A Pending CN106430838A (en) | 2016-11-17 | 2016-11-17 | Process for treatment of alkali-minimization wastewater in printing and dyeing industry |
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Citations (4)
| 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 |
| 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 |
| CN204097280U (en) * | 2014-08-23 | 2015-01-14 | 顾云峰 | A kind of Sewage treatment systems |
| 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 CN201611011202.1A patent/CN106430838A/en active Pending
Patent Citations (4)
| 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 |
| 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 |
| CN204097280U (en) * | 2014-08-23 | 2015-01-14 | 顾云峰 | A kind of Sewage treatment systems |
| 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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Application publication date: 20170222 |
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