CN104030528A - Processing method of printing and dyeing wastewater - Google Patents
Processing method of printing and dyeing wastewater Download PDFInfo
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- CN104030528A CN104030528A CN201410252219.0A CN201410252219A CN104030528A CN 104030528 A CN104030528 A CN 104030528A CN 201410252219 A CN201410252219 A CN 201410252219A CN 104030528 A CN104030528 A CN 104030528A
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Abstract
The invention discloses a processing method of printing and dyeing wastewater. The processing method comprises the steps of biochemical treatment, iron-carbon micro-electrolysis aeration treatment, sedimentation treatment, and cross-flow filtration treatment of a tubular micro-filtration membrane, and specifically comprises the following steps: entering the printing and dyeing wastewater to a biochemical pool, firstly carrying out biochemical treatment and then adjusting the pH to 2-5 in a first regulating reservoir; then entering an iron-carbon micro-electrolysis aeration tank to carry out iron-carbon micro-electrolysis treatment, entering a second regulating reservoir to adjust the pH to 7-9, and then entering a settling pond to participate; finally entering a tubular micro-filtration membrane cross-flow filtration device to filter, so as to obtain the processed clean water. The processing method has the advantages that the iron-carbon micro-electrolysis technology is combined with a membrane separation technique, the original flocculant and multi-stage precipitation are replaced by using the iron-carbon micro-electrolysis method to reduce COD and the chromacity, and the removal effect on the COD and the chromacity is obviously improved; meanwhile, use of the flocculant and secondary pollution of processed water are reduced; the traditional multi-stage participation and adsorption method is replaced with the tubular micro-filtration membrane cross-flow filtration device, so that the floor area is reduced, and use of an adsorbent is reduced, therefore, the use cost is reduced.
Description
Technical field
The invention belongs to technical field of waste water processing, specifically a kind for the treatment of process of dyeing waste water.
Background technology
The dyeing waste water of dyeing discharge is one of major polluting sources in China's industrial system, and dyeing waste water belongs to the organic wastewater that contains a certain amount of recalcitrant substance.Its Pollutant levels high (COD), colourity is dark, is one of unmanageable trade effluent.The treatment process of dyeing waste water is broadly divided into biological process, chemical method, the large class of physico-chemical processes 3.But due to dyeing waste water complicated component, single treatment process often can not reach desirable treatment effect, mostly adopt in actual applications the combination of several method to complete the thorough processing to dyeing waste water.The treatment process of current domestic dyeing waste water generally adopts materialization processing+biochemical treatment apparatus, if more complicated but process water water quality, the COD in water outlet, colourity and salinity are all higher, and discharge water cannot meet the requirement of environmental protection.As the Chinese invention patent " a kind for the treatment of process of dyeing waste water " that the patent No. is CN200910031911.X, formed by equalizing tank, lift pump, coagulation system, preliminary sedimentation tank, catalytic oxidation settling system, sand filter, activated carbon adsorption tank, sludge pump, nine parts of sludge thickener.The treatment process of this dyeing waste water has adopted coagulation, catalytic oxidation, sand filtration and charcoal absorption process integration, after processing coagulation process and biochemical treatment contact oxidation technology, materialization adds sand filtration and charcoal absorption advanced treatment process, the dyeing waste water of high density, high chroma is had to reasonable treatment effect, but still need multi stage precipitation, floor space is large, in treating processes, to throw in the chemical assistant such as coagulating agent, coagulant aids, not only cost is high, but also easily causes the secondary pollution of processed water.
Summary of the invention
Technical problem to be solved by this invention is to provide that a kind for the treatment of effect is good, simple to operate, the treatment process of lower-cost dyeing waste water.
The present invention solves the problems of the technologies described above adopted technical scheme: the treatment process of this dyeing waste water, it is characterized in that comprising with step: biochemical treatment, the micro-electrolysis Air Exposure of iron charcoal, settling tank precipitation process and the processing of tube type filter membrance cross flow filter, dyeing waste water enters first through biochemical treatment from biochemistry pool, then adjust pH to 2～5 at the first equalizing tank, then enter the micro-electrolysis of iron charcoal aeration tank and carry out iron charcoal microelectrolysis processing, enter again the second equalizing tank and adjust pH to 7～9, then enter settling tank precipitation, finally entering tube type filter membrance cross-flow filtration device filters, processing water is after filtering water purification and is recovered utilization.
As improvement, described tube type filter membrance cross-flow filtration device comprise film pipe, in film pipe, increase hydraulic pressure topping-up pump, be arranged on the tube type filter membrance with function that can back flushing in film pipe, described tube type filter membrance is that the microfiltration membrane be made up of polyvinylidene difluoride (PVDF) material is embedded in the porous skeleton of being made up of polyethylene or polyvinylidene difluoride (PVDF) and the tube type filter membrance forming.
As improvement, described in the method for inlaying may be selected to be in polyethylene or polyvinylidene difluoride (PVDF) porous skeleton and be full of microfiltration membrane material.
As improvement, in described tube type filter membrance cross-flow filtration device, also can be provided with thickened waste water out, thickened waste water out is connected with settling tank by pipeline.
Improve, described tube type filter membrance cross-flow filtration device has function that can back flushing again, and water purification is penetrated into inside under pressure by film pipe outside, and removes the particle being mounted in fenestra, to keep the lasting good strainability of microfiltration membrane.
Improve, the rear mud producing of described settling tank precipitation is landfilled after slag is pressed in dehydration to be processed or as fertilizer sources recycling again.
As improvement, in described tube type filter membrance cross-flow filtration device, film pipe water flow inside speed is preferably: 3～4.5 meter per seconds.
As improvement, the aperture of holding back micropore of described microfiltration membrane can be preferably 0.1 micron.
Compared with prior art, the invention has the advantages that: the present invention adopts iron charcoal micro electrolysis tech to combine with membrane separation technique, utilize the method for the micro-electrolysis of iron charcoal to replace original flocculation agent and multi stage precipitation to reduce COD (oxygen-consumption causes mark below 80) and colourity, obviously improve the removal effect of COD and colourity, reduced the use of flocculation agent and the secondary pollution of processed water simultaneously; Replace traditional multi stage precipitation and absorption method with tube type filter membrance cross-flow filtration device, reduced floor space on the one hand, reduced on the other hand the use of sorbent material, thereby reduced use cost.Therefore, good waste water treatment effect of the present invention, filtering membrane long service life, maintenance cost are low, and its water quality of the water obtaining after processing reaches completely to reuse water requirement, thereby, efficiently solve the advanced treatment problem of dyeing waste water.
Brief description of the drawings
Fig. 1 is the process flow sheet of the treatment process of dyeing waste water of the present invention;
Fig. 2 is tube type filter membrance structure vertical section electromicroscopic photograph in the present invention;
Fig. 3 is tube type filter membrance structure cross section electromicroscopic photograph in the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
As shown in Figure 1, the treatment process of the dyeing waste water of the present embodiment, comprise with step: biochemical treatment, the micro-electrolysis Air Exposure of iron charcoal, settling tank precipitation process and the processing of tube type filter membrance cross flow filter, dyeing waste water enters first through biochemical treatment from biochemistry pool, then adjust pH to 2～5 at the first equalizing tank, then enter the micro-electrolysis of iron charcoal aeration tank and carry out iron charcoal microelectrolysis processing, enter again the second equalizing tank and adjust pH to 7～9, then enter settling tank precipitation, finally entering tube type filter membrance cross-flow filtration device filters, processing water is after filtering water purification and is recovered utilization.
Above-mentioned tube type filter membrance is that the microfiltration membrane be made up of polyvinylidene difluoride (PVDF) material is embedded in the porous skeleton of being made up of polyethylene or polyvinylidene difluoride (PVDF) and the tube type filter membrance forming; The method of inlaying is in polyethylene or polyvinylidene difluoride (PVDF) porous skeleton, to be full of the microfiltration membrane material forming through inversion of phases, this structure had both ensured the aperture uniformity of microfiltration membrane pipe, can ensure again the firm and durability of microfiltration membrane material, have and the advantage such as support frame bonding strength is high, high pressure resistant, be difficult for peeling off, thereby extend the work-ing life of film and reduce film maintenance cost.Described tube type filter membrance cross-flow filtration device is provided with thickened waste water out, thickened waste water out is connected with settling tank by pipeline, described tube type filter membrance cross-flow filtration device has function that can back flushing, be that water purification is penetrated into inside under pressure by film pipe outside, and remove the particle being mounted in fenestra, the water production rate of Recovery processing system, to keep the lasting good strainability of microfiltration membrane; The rear mud producing of described settling tank precipitation is landfilled after slag is pressed in dehydration to be processed or as fertilizer sources recycling.The structure of described tube type filter membrance is shown in Fig. 2 and Fig. 3.
Below processing treatment process of the present invention is described further, treating processes is such: dyeing waste water is first through biochemical, materialization processing, adding sulfuric acid to adjust pH value is 2～5 again, then carries out the micro-electrolysis of iron charcoal (fully atomization aeration) and processes, and long-chain organic molecule is interrupted.It is 7～9 that water outlet adds sodium hydroxide to adjust pH value again, generates the Fe (OH) with good flocculation and adsorption effect
2and Fe (OH)
3, reach effective flocculation and precipitation.Can enter tube type filter membrance cross flow filter system and carry out concentration, because microfiltration membrane cross flow filter system can be accepted the solids content up to 5%, and the high turbidity cycle water of 20NTU, save settling tank floor space, reduce cost and water resource waste.In film pipe, the aperture of holding back micropore of microfiltration membrane is 0.1 micron, makes effluent quality can reach reuse water standard, realizes recycling of dyeing waste water.In tube type filter membrance cross-flow filtration device, film pipe inside, high flow velocity (3～4.5 meter per second) can be taken away solia particle with cross-flow, therefore can not form on film surface accumulation or the fouling of particulate, reduce the situation that fenestra gets clogged, thereby make system there is higher and stable flux, extend the work-ing life of film simultaneously, due to the inserted film distributed architecture of tube type filter membrance, be embedded in the intraskeletal pvdf membrane of microporous PE (or PVDF) and can not come off, therefore system allows back flushing.Cross flow filter system general work carried out back flushing once about 0.5～1 hour, and each back flushing is about 10～20 seconds.When back flushing cannot recover in the situation of water flux, microfiltration membrane pipe allows to adopt 5～15%NaClO strong oxidizer+1～3%NaOH to soak, and removes the organic contamination of film pipe, can recover normal water outlet.
After implementing, adopt the water obtaining after native system treatment of dyeing and printing, its water quality reaches reuse water requirement, colourity≤25, CODMn≤80, total hardness (CaCO3 meter)≤400mg/L, transparency >=30, pH value 6-9, SS (granularity standard)≤30mg/L, iron: 0.2-0.3mg/L, manganese≤0.2mg/L.
Mesophytization treatment process of the present invention: wastewater biological method of chemical treatment is called for short " wastewater biochemical method ", refer to and pass through artificial aeration, and utilize the metabolism of microorganism, make to be in waste water and dissolve and the organic pollutant of colloidal state is converted into innoxious substance, to realize the method for purification.Can be divided into aerobiont facture and Anaerobic biotreatment method.
Biochemical treatment generally includes two important elements: 1. a large amount of aeration oxygen supplys in water, and to support the survival of microorganism.2. utilize microorganism to decompose the organism in sewage, thereby purify waste water.Biochemical treatment is the core of most of traditional waste water treatment process, and the most of municipal wastewaters of China are processed field and all adopted biochemical processing to process city resident's sanitary sewage.
In the present invention, anaerobic waste water biological treatment refers to: anaerobic waste water biological treatment claims again " anaerobic digestion ", is to utilize anaerobion with the organic pollutant in degrading waste water, makes the method for purification of waste water.Its mechanism be under the effect of anaerobic bacterium by the organic substance decomposing in mud, finally produce the gases such as methane and carbon dioxide.
The bright middle waste water aerobiont facture of this limit refers to: waste water aerobiont facture is the organic pollutant utilizing in aerobic microorganism (being mainly aerobic bacteria) Decomposition Wastewater, makes the innoxious treatment process of waste water.Its mechanism is, after waste water is with microorganism contact, the dissolved organic matter in water sees through the cell walls of bacterium and cytolemma and is absorbed and enters in thalline; Colloid and suspension organism are attracted to thalline surface, are decomposed into after deliquescent material by the exoenzyme of bacterium, also enter in thalline.These organism are by the oxidized degraded of catabolic process in thalline, and the energy of generation is for the needs of bacterium vital movement; Part intermediate oxidation product becomes new cellular material by anabolism, makes bacterium be able to growth and breeding.The final product of processing is the stable inorganicss such as carbonic acid gas, water, ammonia, vitriol and phosphoric acid salt.When processing, supply with microorganism with the nutrition source of sufficient oxygen and various necessity as elements such as carbon, nitrogen, phosphorus and potassium, magnesium, calcium, sulphur, sodium; Should control the life condition of microorganism, as pH is preferably 6.5～9, water temperature is preferably 10～35 DEG C etc. simultaneously.Main method has activated sludge process, biomembrance process, oxidation pond process etc.
Above-mentioned materialization processing: refer to waste water physicochemical processing, materialization processing refers to the method for using the comprehensive action of physics and chemistry that waste water is purified.And physical chemistry processing and physical treatment, chemical treatment are combined into three kinds of modes of broad sense waste water physicochemical processing.It can be both treatment system independently that physical chemistry is processed, and can be also the subsequent disposal measure of biochemical treatment.Water quality requirement, the processing costs etc. of waste water quality, discharge or recycling depended in the selection of its technique.For removing chemical coagulation one precipitation that the pollutent with dissolving of suspension adopts and the bi-level treatment of charcoal absorption, it is exactly more typical a kind of physical chemistry treatment system.
Claims (8)
1. the treatment process of a dyeing waste water, it is characterized in that comprising with step: biochemical treatment, the micro-electrolysis Air Exposure of iron charcoal, settling tank precipitation process and the processing of tube type filter membrance cross flow filter, dyeing waste water enters first through biochemical treatment from biochemistry pool, then adjust pH to 2～5 at the first equalizing tank, then enter the micro-electrolysis of iron charcoal aeration tank and carry out iron charcoal microelectrolysis processing, enter again the second equalizing tank and adjust pH to 7～9, then enter settling tank precipitation, finally entering tube type filter membrance cross-flow filtration device filters, processing water is after filtering water purification and is recovered utilization.
2. the treatment process of dyeing waste water according to claim 1, it is characterized in that: described tube type filter membrance cross-flow filtration device comprise film pipe, in film pipe, increase hydraulic pressure topping-up pump, be arranged on the tube type filter membrance with function that can back flushing in film pipe, described tube type filter membrance is that the microfiltration membrane be made up of polyvinylidene difluoride (PVDF) material is embedded in the porous skeleton of being made up of polyethylene or polyvinylidene difluoride (PVDF) and the tube type filter membrance forming.
3. the treatment process of dyeing waste water according to claim 2, is characterized in that: described in the method for inlaying for to be full of microfiltration membrane material in polyethylene or polyvinylidene difluoride (PVDF) porous skeleton.
4. according to the treatment process of dyeing waste water described in claim 1 or 2 or 3, it is characterized in that: described tube type filter membrance cross-flow filtration device is provided with thickened waste water out, and thickened waste water out is connected with settling tank by pipeline.
5. according to the treatment process of dyeing waste water described in claim 1 or 2 or 3, it is characterized in that: described tube type filter membrance cross-flow filtration device has function that can back flushing, be that water purification is penetrated into inside under pressure by film pipe outside, and remove the particle being mounted in fenestra, to keep the lasting good strainability of microfiltration membrane.
6. according to the treatment process of dyeing waste water described in claim 1 or 2 or 3, it is characterized in that: the rear mud producing of described settling tank precipitation is landfilled after slag is pressed in dehydration to be processed or as fertilizer sources recycling.
7. according to the treatment process of dyeing waste water described in claim 1 or 2 or 3, it is characterized in that: in described tube type filter membrance cross-flow filtration device, film pipe water flow inside speed is: 3～4.5 meter per seconds.
8. according to the treatment process of dyeing waste water described in claim 1 or 2 or 3, it is characterized in that: the aperture of holding back micropore of described microfiltration membrane is 0.1 micron.
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| CN201410252219.0A CN104030528A (en) | 2014-05-27 | 2014-05-27 | Processing method of printing and dyeing wastewater |
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| CN201410252219.0A CN104030528A (en) | 2014-05-27 | 2014-05-27 | Processing method of printing and dyeing wastewater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106277581A (en) * | 2016-08-15 | 2017-01-04 | 吴小慧 | The processing method of printing and dyeing industrial waste water |
| CN107010790A (en) * | 2017-05-27 | 2017-08-04 | 江苏艾特克环境工程设计研究院有限公司 | A kind of efficient treatment of dyeing wastewater change system |
| CN107792968A (en) * | 2016-08-30 | 2018-03-13 | 江苏吉华化工有限公司 | A kind of biodegrading process of aroma type disperse dyestuff waste water |
| CN112194290A (en) * | 2020-06-30 | 2021-01-08 | 广州中科建禹环保有限公司 | Physicochemical treatment system and method for cosmetic production waste liquid |
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| CN101306853A (en) * | 2008-07-09 | 2008-11-19 | 天津工业大学 | Film-electricity coupling treatment technology for treating difficult-to-biodegrade waste water and device |
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Patent Citations (3)
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| CN101306853A (en) * | 2008-07-09 | 2008-11-19 | 天津工业大学 | Film-electricity coupling treatment technology for treating difficult-to-biodegrade waste water and device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106277581A (en) * | 2016-08-15 | 2017-01-04 | 吴小慧 | The processing method of printing and dyeing industrial waste water |
| CN107792968A (en) * | 2016-08-30 | 2018-03-13 | 江苏吉华化工有限公司 | A kind of biodegrading process of aroma type disperse dyestuff waste water |
| CN107010790A (en) * | 2017-05-27 | 2017-08-04 | 江苏艾特克环境工程设计研究院有限公司 | A kind of efficient treatment of dyeing wastewater change system |
| CN112194290A (en) * | 2020-06-30 | 2021-01-08 | 广州中科建禹环保有限公司 | Physicochemical treatment system and method for cosmetic production waste liquid |
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Application publication date: 20140910 |