CN102060419A - Treating process of printing and dyeing waste water - Google Patents
Treating process of printing and dyeing waste water Download PDFInfo
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- CN102060419A CN102060419A CN2009102310073A CN200910231007A CN102060419A CN 102060419 A CN102060419 A CN 102060419A CN 2009102310073 A CN2009102310073 A CN 2009102310073A CN 200910231007 A CN200910231007 A CN 200910231007A CN 102060419 A CN102060419 A CN 102060419A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The invention relates to a treating process of printing and dyeing waste water, which comprises a grid, a conditioning tank, a settling tank, a decoloring fluid bed, a hydrolysis and acidification tank, an aerobic membrane bioreactor, a sludge thickening tank and a sludge dewatering tank, wherein a stuffing mixture of natural manganese sand and spongy iron (or scrap iron) with a thickness of 100-120 cm is arranged in the decoloring fluid bed. The treating process provided by the invention can effectively weaken the color of the printing and dyeing waste water and remove organic pollutants from the printing and dyeing waste water, has the advantages of stable treatment effect, low running cost, small sludge discharge amount and the like, and is convenient to operate and easy to automatically control. The quality of the treated water can come up to the discharging standards and meet the water quality requirements for reuse water for production, thereby having favorable environment benefits, economic benefits and social benefits.
Description
Technical field
The invention belongs to environmental technology field, what be specifically related to is a kind of printing-dyeing waste water treatment process.
Background technology
Dyeing waste water is the waste water that textile products such as cotton, hair, chemical fibre are discharged in pre-treatment, dyeing, stamp and arrangement process, mainly from floating operations such as refining, dyeing, destarch, arrangement.Dyeing waste water has that the water yield is big, component is complicated, organic pollutant content height, colourity is dark and characteristics such as biodegradability difference, is one of more unmanageable trade effluent.If the below standard water body that enters of dyeing waste water, the organic pollutant that contains will consume oxygen in water, and high chroma influences the natural landscape of water body and hinders the transmission of daylight in water body, has reduced water transparency, the photosynthesis that is unfavorable for waterplant destroys the water ecology balance; In addition, the hazardous and noxious substances that is contained in the dyeing waste water (as precursor of heavy metal, dyestuff etc.) is to can seriously being detrimental to health.At present, Chang Yong treatment method of printing and dying wastewater has physico-chemical processes and biological process.Wherein, physico-chemical processes comprises absorption method, membrane separation process, chemical oxidization method, electrochemical oxidation process, photocatalysis oxidation technique, Coagulation Method; Biological process comprises aerobe method, anaerobic biological process, anaerobic-aerobic method and anaerobic-anoxic-aerobic method etc.Because the dyeing waste water complicated component, single treatment process often can not reach the ideal treatment effect, and the combination process that adopts physical chemistry to combine with biological process often in actual engineering is handled dyeing waste water.
In recent years, change along with dyeing and printing process and product structure, especially the development of chemical ﹠ blended fabric and finishing process in printing and dye-ing development of technology, bio-refractory organism such as a large amount of PVA slurries, New-type adjuvant enter dyeing waste water in a large number, thereby make the water quality of dyeing waste water that new variation also take place, the intractability of dyeing waste water also strengthens thereupon.Because it is quite big that the COD that chemical sizwes such as PVA cause accounts for the ratio of the total COD of dyeing waste water, the biodegradability of dyeing waste water is relatively poor, original biological treatment system COD clearance drops to about 50% by original 70%, and existing general treatment process is difficult to reach the I and II emission request that " textile dyeing and finishing industrial wastewater pollution thing emission standard " (GB4287-92) stipulated.Therefore, the R and D dyeing waste water combined treatment technology work that is necessary efficiently.
Summary of the invention
Defective and deficiency at existing in the existing printing-dyeing waste water treatment process the invention provides a kind of new printing-dyeing waste water treatment process.The objective of the invention is to be achieved through the following technical solutions: printing-dyeing waste water treatment process is made up of grid, equalizing tank, settling tank, decolouring fluidized-bed, hydrolysis acidification pool, membrane bioreactor, sludge thickener and sludge dewatering pond etc.The effluent quality of this technology can satisfy direct discharging or as producing reuse water, after the mud that settling tank and membrane bioreactor produce was handled by sludge thickener and sludge dewatering pond, unified outward transport was handled.
Be provided with the natural manganese sand and the sponge iron mixed fillers of 100cm-120cm thickness in the described decolouring fluidized-bed, the particle size range of natural manganese sand and sponge iron or iron filings is 1-5mm, Manganse Dioxide content is higher than 35% in the natural manganese sand, the mass ratio of sponge iron and natural manganese sand is 18 in the mixed fillers: 1-18: 7, and the pre-treatment of sponge iron adopts dilute hydrochloric acid or the sulfuric acid of concentration 3-4% to carry out pickling.Manganese sand catalysis sponge iron galvanic cell decolouring technology has been adopted in decolouring of the present invention, the advantage that mainly comprises following five aspects: (1) is compared with iron filings, and sponge iron is compared has porosity and characteristics such as specific surface area is big, specific surface energy is high, electrochemistry enrichment, redox, physical adsorption performance are better; (2) sponge iron is made up of pure iron, carbon, Fe3C and some impurity.Wherein, carbon, Fe3C and some other impurity are dispersed in the sponge iron with minimum particle form.Because their current potential is lower than iron, just forms numerous galvanic cell in being in dyeing waste water, just there is electric current in thousands of tiny galvanic cells, to flow on the surface of sponge iron, specifically react as follows:
Anode: Fe → Fe2++2e-E0 (Fe2+/Fe)=-0.44V
Negative electrode: 2H++2e-under the acidic conditions → H2 E0 (H+/H2)=0.00V
O2+2H2O+4e-under alkalescence or the neutrallty condition → 4OH-E0 (O2/OH-)=0.4V
Wherein, [H] of nascent state and Fe2+ etc. can with the various ingredients generation redox reaction in the waste water, destroy dye molecule color development or auxochrome group structure, azo bond is broken, reach the purpose of decolouring; Simultaneously, Fe (OH) 2 that anodic product Fe2+ and Fe3+ and OH-form and Fe (OH) 3 have strong coagulation, can adsorb suspended substance, other organism of dye well in the dyeing waste water; (3) catalysis and the oxygenizement by Manganse Dioxide in the manganese sand, strengthened the decolorizing effect of sponge iron, simultaneously, because manganese sand has removal effect preferably to the iron in the water, in decolorization, can remove the iron ion that produces in the generation galvanic cell process effectively, reduce the iron level in the decolorizing reaction tank water outlet; (4) operation scheme and a certain proportion of manganese sand of interpolation by adopting fluidized-bed has solved sponge iron fixed bed existing in decolorization " caking " and " channel " problem effectively, and decolorizing efficiency is provided; (5) by manganese sand catalysis sponge iron fluidized-bed dyeing waste water is decoloured, on the basis of decolouring, the dyestuff macromole of difficult degradation is transformed into the small-molecule substance of easy degraded, thereby has improved the biodegradability of dyeing waste water effectively.Simultaneously, because the throwing out of iron ion is removed the part organic pollutant, alleviated the burden of subsequent biological treatment.
Described hydrolysis acidification pool water inlet pH scope is 6.5-7.5, and hydraulic detention time is 14-20 hour.Membrane bioreactor adopts the integrative aerobic membrane bioreactor, and membrane module adopts ultra-filtration membrane or microfiltration membrane.
The present invention has that treatment effect is stable, and working cost is low, and sludge discharge is few, and is easy to operate and be easy to advantage such as control automatically, and the water quality after the processing can qualified discharge, and satisfies the water quality requirement of production reuse water.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.Wherein, 1-grid; The 2-equalizing tank; The 3-settling tank; The 4-fluidized-bed that decolours; The 5-hydrolysis acidification pool; The 6-aerobic membrane bioreactor; The 7-sludge thickener; 8-sludge dewatering pond.
Embodiment
Processing technological flow of the present invention is made up of grid 1, equalizing tank 2, settling tank 3, decolouring fluidized-bed 4, hydrolysis acidification pool 5, aerobic membrane bioreactor 6, sludge thickener 7 and sludge dewatering pond 8 as shown in Figure 1, and embodiment is as follows:
1, dyeing waste water is held back bigger suspended substance and floating matter by grid 1, and to alleviate the processing load of subsequent disposal structures, the grid slag of generation is handled by outward transport.
2, after the dyeing waste water of grid 1 processing carries out the water yield and water quality regulation by equalizing tank 2, enter settling tank 3 and remove suspended matters.
3, settling tank 3 water outlets enter decolouring fluidized-bed 4, decolour, remove the biodegradability of partial organic substances and raising waste water by manganese sand catalysis galvanic cell reaction pair waste water.Wherein, the quality of sponge iron and manganese sand is 18 than scope in the decolouring fluidisation pond: 1-18: 7, and the water inlet direction is for from bottom to top, and sponge iron and manganese sand mixed fillers are suspended state.
4, decolouring fluidized-bed 4 water outlets enter hydrolysis acidification pool 5, and water inlet pH scope is 6.5-7.5, make the macromolecular substance of difficult for biological degradation be converted into the small-molecule substance of readily biodegradable by hydrolysis acidification pool 5, and that improves waste water can be biological; Simultaneously, remove the part organic pollutant.
5,5 water outlets of decolouring fluidized-bed enter integrative aerobic membrane bioreactor 6, further reduce organic pollutant, water outlet is satisfied produced the reuse water requirement.
6, after the mud of settling tank 3 and membrane bioreactor 6 generations is handled by sludge thickener 7 and sludge dewatering pond 8, unified outward transport processing.
Claims (5)
1. printing-dyeing waste water treatment process, it is characterized in that, form by grid, equalizing tank, settling tank, decolouring fluidized-bed, hydrolysis acidification pool, aerobic membrane bioreactor, sludge thickener and sludge dewatering pond, water outlet is directly discharged or reuse through aerobic membrane bioreactor, after the mud that settling tank and membrane bioreactor produce is handled by sludge thickener and sludge dewatering pond, unified outward transport.
2. according to claim 1 described a kind of printing-dyeing waste water treatment process, wherein, be provided with the natural manganese sand and the sponge iron mixed fillers of 100cm-120cm thickness in the decolouring fluidized-bed, the particle size range 1-5mm of natural manganese sand and sponge iron or iron filings, Manganse Dioxide content is higher than 35% in the natural manganese sand, the mass ratio of sponge iron and natural manganese sand is 18 in the mixed fillers: 1-18: 7, and the pre-treatment of sponge iron adopts dilute hydrochloric acid or the sulfuric acid of concentration 3-4% to carry out pickling.
3. according to claim 1 or 2 described a kind of printing-dyeing waste water treatment process, wherein, the interior water (flow) direction of decolouring fluidized-bed is for from bottom to top, and mixed fillers is in suspended state, and dilute hydrochloric acid immersion carrying out the then back flushing of concentration 3-4% is adopted in the mixed fillers regeneration of reaction back.
4. according to claim 1 described a kind of printing-dyeing waste water treatment process, wherein, hydrolysis acidification pool water inlet pH scope is 6.5-7.5, and hydraulic detention time is 14-20h.
5. according to claim 1 described a kind of printing-dyeing waste water treatment process, wherein, membrane bioreactor adopts the integrative aerobic membrane bioreactor, and membrane module is ultra-filtration membrane or microfiltration membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009102310073A CN102060419A (en) | 2009-12-11 | 2009-12-11 | Treating process of printing and dyeing waste water |
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| CN2009102310073A CN102060419A (en) | 2009-12-11 | 2009-12-11 | Treating process of printing and dyeing waste water |
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| CN102060419A true CN102060419A (en) | 2011-05-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102329043A (en) * | 2011-08-02 | 2012-01-25 | 浙江商达环保有限公司 | Method for treating and printing and dyeing wastewater by using hydrolysis tank |
| CN105502569A (en) * | 2015-12-01 | 2016-04-20 | 绍兴文理学院 | MoO3 thin film dyeing wastewater treatment equipment and preparation method |
| CN105905994A (en) * | 2016-04-27 | 2016-08-31 | 天津工业大学 | Novel method of utilizing process of conversion between chemical energy and electric energy of printing and dyeing wastewater to treat same |
| CN106082529A (en) * | 2016-06-13 | 2016-11-09 | 山东如意数码科技印染有限公司 | A kind for the treatment of method of printing and dying wastewater and processing equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101264999A (en) * | 2008-04-23 | 2008-09-17 | 山东大学 | Process and apparatus for treating sewage |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101264999A (en) * | 2008-04-23 | 2008-09-17 | 山东大学 | Process and apparatus for treating sewage |
Non-Patent Citations (2)
| Title |
|---|
| 吴慧芳: "折流式水解—复合膜生物法处理印染废水的研究", 《中国博士学位论文全文数据库》 * |
| 孙艳霞: "锰砂催化海绵铁内电解法与膜生物反应器耦合工艺处理印染废水的研究", 《中国优秀硕士学位论文全文数据库工程科技I辑》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102329043A (en) * | 2011-08-02 | 2012-01-25 | 浙江商达环保有限公司 | Method for treating and printing and dyeing wastewater by using hydrolysis tank |
| CN102329043B (en) * | 2011-08-02 | 2013-03-27 | 浙江商达环保有限公司 | Method for treating and printing and dyeing wastewater by using hydrolysis tank |
| CN105502569A (en) * | 2015-12-01 | 2016-04-20 | 绍兴文理学院 | MoO3 thin film dyeing wastewater treatment equipment and preparation method |
| CN105502569B (en) * | 2015-12-01 | 2017-12-26 | 徐灵娟 | A kind of MoO3Film dyeing and printing sewage processing equipment and preparation method |
| CN105905994A (en) * | 2016-04-27 | 2016-08-31 | 天津工业大学 | Novel method of utilizing process of conversion between chemical energy and electric energy of printing and dyeing wastewater to treat same |
| CN106082529A (en) * | 2016-06-13 | 2016-11-09 | 山东如意数码科技印染有限公司 | A kind for the treatment of method of printing and dying wastewater and processing equipment |
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Application publication date: 20110518 |