CN101525202A - Advanced dyeing wastewater treatment and reclaimed water reuse system and method thereof - Google Patents
Advanced dyeing wastewater treatment and reclaimed water reuse system and method thereof Download PDFInfo
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- CN101525202A CN101525202A CN200910049268A CN200910049268A CN101525202A CN 101525202 A CN101525202 A CN 101525202A CN 200910049268 A CN200910049268 A CN 200910049268A CN 200910049268 A CN200910049268 A CN 200910049268A CN 101525202 A CN101525202 A CN 101525202A
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Abstract
The invention relates to an advanced dyeing wastewater treatment and reclaimed water reuse system and a method thereof. The system consists of a regulating tank (2), a coagulation tank (3), a preliminary sedimentation tank (4), an acidification hydrolysis tank (5), a deep well (6), a deaeration tank (7), a secondary sedimentation tank (8), a biological activated carbon tank (9), a sludge concentration tank (10), a sludge dewatering tank (11), a filter tank (12) and an ozone oxidation tank (13). The method comprises the following steps: wastewater is sent to the regulating tank, the coagulation tank and the preliminary sedimentation tank, then sludge is returned to the coagulation tank, excess sludge is discharged to the sludge concentration tank, clarified water flows to the acidification hydrolysis tank, is sent to a deep well aeration tank and then sent to the secondary sedimentation tank; and the obtained clarified water is discharged after meeting the standard, or flows to the biological activated carbon tank and is treated for production. The system and the method have the advantages of simple process, low operating cost, high stability and reliability, convenient operation, and realization of automation control. Most of the wastewater discharged is reused in production after the treated wastewater meets the standard, thus reducing emission of pollutants, being capable of eliminating environmental pollution resulting from the wastewater and protecting environment.
Description
Technical field
The invention belongs to water treatment field in the textile dyeing and finishing, particularly relate to a kind of dyeing waste water advanced treatment and intermediate water reuse system and method.
Background technology
Dyeing is the important component part of textile industry, is the crucial industry that promotes quality product, improves added value of product, is again water consumption, power consumption, industry that blowdown is bigger.In recent years, under the pulling that textile industry increases steadily fast, dyeing has obtained fast development, meanwhile also more and more is subjected to the restriction of resource, environment.Dyeing waste water is mainly derived from pre-treatment, two operations of dyeing and printing, has characteristics such as the water yield is big, organic pollutant content height (the COD value is high), colourity is dark, alkalescence is big, change of water quality is big, belongs to unmanageable trade effluent.In addition, the dyeing and finishing processing of textiles also will be used a large amount of acid, alkali, salt, tensio-active agent and various functional finish etc., these chemical certainly will will cause certain environmental pollution, therefore, dyeing and finishing already is called as " energy consumption rich and influential family (water rich and influential family), heavy polluter ", according to incompletely statistics, China's dyeing waste water quantity discharged is about every day 3 * 10
6m
3～4 * 10
6m
3, account for 35% of whole trade effluent, and reclamation rate is less than doing the waste water discharging more than 10%, 90%.Ecology that causes therefrom and financial loss are immeasurable.In addition, it is regional to distribute at dyeing, particularly in the relatively shorter place of water resources, because the fresh water total amount of supply is restricted, the increase or the production-scale expansion of printing and dyeing enterprise output are restricted, enterprise development is restricted, so the energy-saving and emission-reduction work of dyeing is extremely urgent, and must realize increases income and decreases expenditure satisfies the water consumption that increases in the production process.
At present, dyeing waste water advanced treatment and reuse technology mainly contain following several:
(1) absorption method.Active carbon adsorption is very effective to dissolved organic matter in the removal water, but it can not remove colloid and hydrophobic dye in the water, and it only has absorption property preferably to water-soluble dyes such as cationic dyestuff, substantive dyestuff, matching stain, reactive dyestuffs.The kaolin sorbent material can adsorb the yellow substantive dyestuff in the waste water effectively.In addition, domestic also application of active diatomite and cinder are handled the traditional dyeing and finishing processing wastewater, and expense is lower, and decolorizing effect is better, and its shortcoming is that the body refuse generation is big, and further intractability is big.
(2) oxidation style.The ozone oxidation method is used more abroad, can obtain good decolorizing effect to most dyestuffs, but relatively poor to water-fast dye decolored effects such as sulfuration, reduction, coating, this method good decolorizing effect, but power consumption is many, and large-scale promotion application has certain difficulty.Photooxidation method treatment of dyeing and printing decolorizing efficiency is higher, but facility investment and power consumption are still waiting further reduction.Adopting the photosensitization semi-conductor is the focus of studying both at home and abroad in recent years for catalyst treatment organic waste water.Photosensitization semi-conductor TiO is adopted in the photosensitization oxidation mostly
2Catalyzing oxidizing degrading waste water is the new technology of wastewater treatment.
(3) biological process.Biotechnology not only is applied in the second-stage treatment of dyeing waste water, can also be as the advanced treatment technology of dyeing waste water.Not high at the pollutent biochemical in the secondary effluent, the characteristics of difficult for biological degradation have mostly been developed the novel reactor of the biological reinforced treatment technology of many employings, with COD and the colourity in the further reduction secondary effluent.Mainly contain biological activated carbon method, BAF etc.
(4) embrane method.Different membrane separation technique (as micro-filtration, ultrafiltration, nanofiltration, reverse osmosis etc.) is combined, or membrane separation technique combining with other technologies (as membrane bioreactor), is a direction of present dyeing waste water advanced treatment.The waste water reuse of embrane method mainly comprises the technical process of " ultra-filtration membrane+reverse osmosis membrane ", and ultrafiltration is to be the membrane sepn process that drives with pressure, and it can be separated particulate matter from fluid and dissolved constituent.Be applied in the treatment scheme again of dyeing waste water, ultra-filtration membrane is except that organism and colourity are had certain removal effect, topmost effect be remove may dirty stifled reverse osmosis membrane impurity such as colloid, bacterium, virus, prolong the cleaning interval and the life-span of reverse osmosis membrane, reduce the overall operation cost; Reverse osmosis membrane can be removed 98% salt ion, removes hardness fully, simultaneously COD, colourity is also had high removal effect, thereby guarantees quality of reused water.
Because the waste water quality of different fabrics, the discharging of different printing and dyeing complete processing has very big-difference, reply waste water component, water quality characteristic are analyzed, and by Technological Economy relatively, select optimized treatment technology.Single treatment process is difficult to the wastewater treatment qualified discharge, need adopt multiplex's associating of planting.Also there are some problems in printing-dying wastewater recycling, as: a large amount of reuses of waste water can bring a series of problems to production and Sewage treatment systems, mainly include the accumulation of organic pollutants and inorganic salt, Sewage treatment systems can't be moved, reclamation rate is too high, and do not carry out desalting treatment, can make production and sewage disposal to carry out yet.Usually, the advanced treatment expense is than conventional processing height, and is not too suitable for the factory that water consumption is less, and the factory big for water consumption just demonstrates its advantage, and can bring economic benefit and environmental benefit for enterprise.Along with the development of new chemical fiber, emulation silk, printing and dyeing finishing technique, refractory organics such as polyvinyl alcohol, dyestuff, New-type adjuvant advance people's dyeing waste water in a large number, and the biodegradability of waste water is further reduced, and these factors also have influence on the reuse of waste water.
Summary of the invention
Technical problem to be solved by this invention provides a kind of dyeing waste water advanced treatment and intermediate water reuse system and method, and this method technology is simple, and working cost is low and reliable and stable, and is easy to operate, can realize automatization control; Wastewater treatment back discharging up to standard major part is back to production, so not only reduces the quantity discharged of pollutent, can also eliminate the pollution of waste water to environment, the protection environment.
A kind of dyeing waste water advanced treatment of the present invention and middle water reusing method comprise:
Dyeing waste water is removed in the waste water through the grid slag remover earlier and is flowed into equalizing tank behind the suspended substance of diameter greater than 1.5mm, carrying out the waste water quality water yield regulates, with sump pump waste water is lifted into coagulation basin then, and before pump, add the inorganic coagulant ferrous sulfate, by water pump impeller stirring carrying out coagulating, through the preliminary sedimentation tank precipitate and separate, precipitating sludge is gone into coagulation basin most of time, unnecessary mud enters sludge thickener, transport outward after the thickening, primary water flows into the acidification hydrolization pond, mixes with the active sludge that refluxes, under anoxia condition, double oxygen animalcule in the active sludge carries out the acidification hydrolization effect to larger molecular organics, is degraded to the small molecules biochemical substances but macromole is difficult to biochemical substances, improves the biodegradability of waste water, mixed solution carries out aerobe to waste water and handles from flowing into the deep well aeration pond behind the acidification hydrolization; Because the degree of depth of deep-well is big, the hydrostaticpressure height, dissolved oxygen concentration is big, can fast and efficiently the oxidation operation in the waste water be degraded to CO
2, H
2O, it is harmless changing harmful, the deep-well treatment solution is after inflow degassing pond removes the microbubble that sticks on the active sludge, go into second pond and carry out solid-liquid separation, precipitating sludge is gone into deep-well, acidification hydrolization pond most of time, and unnecessary mud enters sludge thickener, mud and outward transport after the thickening; The just directly discharging up to standard of the primary water of second pond, otherwise flow into the bioactive carbon pond certainly with the need reuse water, under aerobic condition, utilize the Degradation of gac and microorganism, remove the organism in the waste water, treating water more after filtration, ozone oxidation, sterilization, further after the remaining objectionable impurities of oxidation removal, go into reuse pool, be back to production with pressurization pumping workshop.
Described inorganic coagulant is ferrous sulfate solution (deriving from Changzhou Steel Plant), and every liter of waste water consumption is 8-10mL.
Sewage treatment technology process of the present invention is as follows:
Each processing unit effect is as follows:
1. grid slag remover;
2. equalizing tank: the waste water quality water yield is regulated;
3. coagulation basin: the coagulation stirrer is installed in the pond, is used for waste water dosing coagulation, under stirring fast, add coagulating agent, make it to carry out coagulating with waste water;
4. preliminary sedimentation tank: the solid-liquid separation that is used for waste water behind the coagulation;
5. acidification hydrolization pond: be used for pretreated waste water and carry out the microbial acidification hydrolysis treatment, aeration tube is installed in the pond, make the mixing of waste water and active sludge with a small amount of aeration, and keep in the pond below the dissolved oxygen 0.2mg/L, make the oxygen animalcule of holding concurrently under anoxia condition, larger molecular organics is degraded to small organic molecule, the biodegradability of waste water is provided;
6. deep-well inverted draw cut: be used for removing the deep-well circulation fluid and contain the extremely low waste gas of oxygen;
Auxiliary facility is a deep-well: be the concentric(al) circles steel construction, adopt the gas circulation operation scheme, the compressed and supplied air provides the dissolved oxygen of competent high density again both as the operation power of deep-well for biological action.Deep-well be take up an area of less, treatment effect is good, working cost is low, optimum activity mud method fast and efficiently.
7. degassing pond: because deep-well reaches hundred meters deeply, hydrostaticpressure is 1MPa, and the pressurized air that feeds deep-well all dissolves in the water, circulation contains a large amount of supersaturated airs after arriving the deep-well inverted draw cut in the circulation fluid, can discharge a large amount of microbubbles, adhere on the active sludge, make the active sludge come-up.Adopt aeration to remove the microbubble that sticks on the mud, be convenient to mud and carry out the gravity method solid-liquid separation at second pond;
8. second pond: be the settling tank of radiation formula structure, be used for the solid-liquid separation of deep-well treatment solution
Accessory structure: mud is scraped in the mounting center transmission in the A. pond, is used for collecting precipitation mud; B. sludge reflux pump is used for the precipitating sludge of second pond is returned into deep-well, acidification hydrolization pond and sludge thickener;
9. bioactive carbon pond: waste water stopped in the pond 3-5 hour, micro-hole aerator is arranged at the bottom, pond, thick 2 meters activated carbon filtering layer is arranged at the middle part, pond, by activated carbon adsorption, be enriched on the activated carbon when remaining organism is by the activated carbon filtering layer in the treating water, cover with microorganism on the activated carbon simultaneously, having under the situation of dissolved oxygen, under the synergy of microorganism and activated carbon, the organism in the waste water can be removed efficiently, improves removal effect;
10. sludge thickener: be used for the concentrating of biochemical excess sludge and pre-treatment mud, dehydration;
Screw air compressor: deep-well is carried out the aeration oxygen supply;
Low pressure centrifugal blower: the aeration that is used for equalizing tank, acidification hydrolization pond, degassing pond, bioactive carbon pond;
Sludge dewatering equipment, the mud that wastewater treatment produces mainly comprise the mud that biochemical sludge and coagulation air-float processing produce;
11. sludge dewatering pond;
12. filtering basin: by filtering layer, filtering velocity is the 5-10 meter per second, removes by filter the suspended substance for the treatment of water, and the SS in the treating water is reduced to below the 10mg/L from top to bottom for interior dress quartz sand filter media, treating water;
13. ozone oxidation pond: the pond base fabric is put titanium matter micro-hole aerator, ozone is supplied with by ozonizer, discharging micro-bubble from titanium matter micro-hole aerator contacts with pending water, ozone-containing air dissolves in the water, ozone is the strongest oxygenant, and it can remove colourity remaining in the waste water with bacteria inactivation rate, with the oxidation operation decomposition, make the water cleaning, can be back to production after the processing;
Ozonizer: equipment mainly comprises air compressor machine, instrument air dryer, transformer, ozonizer etc.
Beneficial effect
(1) the inventive method technology is simple, and working cost is low and reliable and stable, and is easy to operate, can realize automatization control;
(2) wastewater treatment of the inventive method back discharging up to standard major part is back to production, so not only reduces the quantity discharged of pollutent, can also eliminate the pollution of waste water to environment, the protection environment.
Description of drawings
Fig. 1 sewage treatment technology process figure; 1 is the grid slag remover, and 2 is equalizing tank, and 3 is coagulation basin, and 4 is preliminary sedimentation tank, and 5 is the acidification hydrolization pond, and 6 is deep-well, and 7 are degassing pond, and 8 is second pond, and 9 is the bioactive carbon pond, and 10 is sludge thickener, and 11 are the sludge dewatering pond, and 12 is filtering basin, and 13 is the ozone oxidation pond.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Dyeing waste water advanced treatment and intermediate water reuse system is characterized in that: by equalizing tank (2), and coagulation basin (3), preliminary sedimentation tank (4), acidification hydrolization pond (5), deep-well (6), degassing pond (7), second pond (8), bioactive carbon pond (9), sludge thickener (10), sludge dewatering pond (11), filtering basin (12), ozone oxidation pond (13) are formed.
Equalizing tank: the waste water quality water yield is regulated;
Coagulation basin: be used for waste water dosing coagulation, stir fast down, add coagulating agent, make it to carry out coagulating with waste water;
Preliminary sedimentation tank: the solid-liquid separation that is used for waste water behind the coagulation;
Acidification hydrolization pond: be used for pretreated waste water and carry out the microbial acidification hydrolysis treatment, aeration tube is installed in the pond, make the mixing of waste water and active sludge with a small amount of aeration, and keep in the pond below the dissolved oxygen 0.2mg/L, make the oxygen animalcule of holding concurrently under anoxia condition, larger molecular organics is degraded to small organic molecule, the biodegradability of waste water is provided;
Deep-well inverted draw cut: be used for removing the deep-well circulation fluid and contain the extremely low waste gas of oxygen;
Auxiliary facility is a deep-well: be the concentric(al) circles steel construction, adopt the gas circulation operation scheme, the compressed and supplied air both as the operation power of deep-well, provided competent high density dissolved oxygen for biological action again.Deep-well be take up an area of less, treatment effect is good, working cost is low, optimum activity mud method fast and efficiently.
Degassing pond: because deep-well reaches hundred meters deeply, hydrostaticpressure is 1MPa, and the pressurized air that feeds deep-well all dissolves in the water, circulation contains a large amount of supersaturated airs after arriving the deep-well inverted draw cut in the circulation fluid, can discharge a large amount of microbubbles, adhere on the active sludge, make the active sludge come-up.Adopt aeration to remove the microbubble that sticks on the mud, be convenient to mud and carry out the gravity method solid-liquid separation at second pond;
Second pond: be the settling tank of radiation formula structure, be used for the solid-liquid separation of deep-well treatment solution, accessory structure: mud is scraped in the mounting center transmission in the A. pond, is used for collecting precipitation mud; B. sludge reflux pump is used for the precipitating sludge of second pond is returned into deep-well, acidification hydrolization pond and sludge thickener;
Sludge thickener: be used for concentrating, dewatering of biochemical excess sludge and pre-treatment mud;
Screw air compressor: deep-well is carried out the aeration oxygen supply;
Low pressure centrifugal blower: the aeration that is used for equalizing tank, acidification hydrolization pond, degassing pond, bioactive carbon pond;
Sludge dewatering equipment: the mud that wastewater treatment produces mainly comprises the mud that biochemical sludge and coagulation air-float processing produce;
The bioactive carbon pond: waste water stopped in the pond 3 hours, micro-hole aerator is arranged at the bottom, pond, thick 2 meters activated carbon filtering layer is arranged at the middle part, pond, by activated carbon adsorption, be enriched on the activated carbon when remaining organism is by the activated carbon filtering layer in the treating water, cover with microorganism on the activated carbon simultaneously, having under the situation of dissolved oxygen, under the synergy of microorganism and activated carbon, the organism in the waste water can be removed efficiently, improves removal effect.
Filtering basin: by filtering layer, filtering velocity is 8 meter per seconds, removes by filter the suspended substance (SS) for the treatment of water, and the SS in the treating water is reduced to 8mg/L from top to bottom for interior dress quartz sand filter media, treating water;
The ozone oxidation pond: the pond base fabric is put titanium matter micro-hole aerator, ozone is supplied with by ozonizer, discharging micro-bubble from titanium matter micro-hole aerator contacts with pending water, ozone-containing air dissolves in the water, ozone is the strongest oxygenant, and it can remove colourity remaining in the waste water with bacteria inactivation rate, with the oxidation operation decomposition, make the water cleaning, can be back to production after the processing;
Ozonizer: equipment mainly comprises air compressor machine, instrument air dryer, transformer, ozonizer etc.
With 98m
3/ hr dyeing waste water is removed in the waste water through the grid slag remover earlier and is flowed into equalizing tank behind the suspended substance of diameter greater than 1.5mm, carries out the waste water quality water yield and regulates, and makes wastewater pH be reduced to 11.1 by 12.5, and the water yield is reduced to 80m
3/ hr is lifted into coagulation basin with sump pump with waste water then, and adds ferrous sulfate solution (deriving from Changzhou Steel Plant) before pump, and every liter of waste water consumption is 10mL, stirs by water pump impeller and carries out coagulating; Through the preliminary sedimentation tank precipitate and separate, precipitating sludge is gone into coagulation basin most of time, unnecessary mud enters sludge thickener, transport outward after the thickening, primary water flows into the acidification hydrolization pond, mix with the active sludge that refluxes, when dissolved oxygen is lower than 0.2mg/L in the pond, double oxygen animalcule in the active sludge carries out the acidification hydrolization effect to larger molecular organics, but macromole is difficult to biochemical substances is degraded to the small molecules biochemical substances, improve the biodegradability of waste water, mixed solution carries out aerobe to waste water and handles from flowing into the deep well aeration pond behind the acidification hydrolization; Because the degree of depth of deep-well is big, the hydrostaticpressure height, dissolved oxygen concentration is big, can fast and efficiently the oxidation operation in the waste water be degraded to CO
2, H
2O, change harmfully in harmless, the deep-well treatment solution is gone into second pond and is carried out that solid-liquid separation, precipitating sludge are most of goes back to deep-well, acidification hydrolization pond after flowing into degassing pond and removing the microbubble that sticks on the active sludge, unnecessary mud enters sludge thickener, mud and outward transport after the thickening; The just directly discharging up to standard of the primary water of second pond, otherwise flow into the bioactive carbon pond certainly with the need reuse water, stop 3h, under aerobic condition, utilize the Degradation of gac and microorganism, remove the organism in the waste water, treating water more after filtration, ozone oxidation, sterilization, further after the remaining objectionable impurities of oxidation removal, go into reuse pool, the pumping workshop is back to production with pressurizeing.
After adopting this invention, the every water-quality guideline of dyeing waste water Inlet and outlet water is as shown in table 1:
Table 1 water treatment effect table
| Project | The water inlet index | Effluent index |
| CODcr(mg/L) | 2000 | 38 |
| BOD5(mg/L) | 750 | 4 |
| Ss suspended solid (mg/L) | 500 | 8 |
| Total phosphorus | 5.1 | 0.39 |
| Ammonia nitrogen | 5.35 | 0.25 |
| Colourity (doubly) | 600 | 4 |
| pH | 12.5 | 8.5 |
Dyeing waste water advanced treatment and intermediate water reuse system is characterized in that: by equalizing tank (2), and coagulation basin (3), preliminary sedimentation tank (4), acidification hydrolization pond (5), deep-well (6), degassing pond (7), second pond (8), bioactive carbon pond (9), sludge thickener (10), sludge dewatering pond (11), filtering basin (12), ozone oxidation pond (13) are formed.
Equalizing tank: the waste water quality water yield is regulated;
Coagulation basin: be used for waste water dosing coagulation;
Preliminary sedimentation tank: the solid-liquid separation that is used for waste water behind the coagulation;
Acidification hydrolization pond: be used for pretreated waste water and carry out the microbial acidification hydrolysis treatment, aeration tube is installed in the pond, with a small amount of aeration waste water and active sludge are mixed, and keep in the pond below the dissolved oxygen 0.2mg/L, make the oxygen animalcule of holding concurrently under anoxia condition, larger molecular organics is degraded to small organic molecule, the biodegradability of waste water is provided;
Deep-well inverted draw cut: be used for removing the deep-well circulation fluid and contain the extremely low waste gas of oxygen;
Degassing pond: adopt aeration to remove the microbubble that sticks on the mud, be convenient to mud and carry out the gravity method solid-liquid separation at second pond;
Second pond: be the settling tank of radiation formula structure, the solid-liquid separation that is used for the deep-well treatment solution, auxiliary facility: mud is scraped in the mounting center transmission in the A. pond, is used for collecting precipitation mud, B. sludge reflux pump is used for the precipitating sludge of second pond is returned into deep-well, acidification hydrolization pond and sludge thickener;
Sludge thickener: be used for concentrating, dewatering of biochemical excess sludge and pre-treatment mud;
Screw air compressor: deep-well is carried out the aeration oxygen supply;
Low pressure centrifugal blower: the aeration that is used for equalizing tank, acidification hydrolization pond, degassing pond, bioactive carbon pond;
Sludge dewatering equipment: sludge dewatering, the mud that wastewater treatment produces mainly comprise the mud that biochemical sludge and coagulation air-float processing produce;
The bioactive carbon pond: waste water stopped in the pond 4 hours, micro-hole aerator is arranged at the bottom, pond, thick 2 meters activated carbon filtering layer is arranged at pond middle part, remaining organism in the treating water, during by the activated carbon filtering layer by activated carbon adsorption, be enriched on the activated carbon, cover with microorganism on the activated carbon simultaneously, having under the situation of dissolved oxygen, under the synergy of microorganism and activated carbon, organism in the waste water can be removed efficiently, improves removal effect;
Filtering basin: by filtering layer, filtering velocity is 6 meter per seconds, removes by filter the suspended substance (SS) for the treatment of water, and the SS in the treating water is reduced to 7mg/L from top to bottom for interior dress quartz sand filter media, treating water;
The ozone oxidation pond: the pond base fabric is put titanium matter micro-hole aerator, ozone is supplied with by ozonizer, discharging micro-bubble from titanium matter micro-hole aerator contacts with pending water, ozone-containing air dissolves in the water, with bacteria inactivation rate, oxidation operation is decomposed, remove colourity remaining in the waste water, make the water cleaning, can be back to production after the processing;
Ozonizer: equipment mainly comprises air compressor machine, instrument air dryer, transformer, ozonizer etc.
With 103m
3/ hr dyeing waste water is removed in the waste water through the grid slag remover earlier and is flowed into equalizing tank behind the suspended substance of diameter greater than 1.5mm, carries out the waste water quality water yield and regulates, and makes wastewater pH be reduced to 10.8 by 12.1, and the water yield is reduced to 85m
3/ hr is lifted into coagulation basin with sump pump with waste water then, and adds ferrous sulfate solution (deriving from Changzhou Steel Plant) before pump, and every liter of waste water consumption is 9mL, stirs by water pump impeller and carries out coagulating; Through the preliminary sedimentation tank precipitate and separate, precipitating sludge is gone into coagulation basin most of time, unnecessary mud enters sludge thickener, transport outward after the thickening, primary water flows into the acidification hydrolization pond, mix with the active sludge that refluxes, when dissolved oxygen in the pond when being lower than 0.2mg/L, double oxygen animalcule in the active sludge carries out the acidification hydrolization effect to larger molecular organics, but macromole is difficult to biochemical substances is degraded to the small molecules biochemical substances, improve the biodegradability of waste water, mixed solution carries out aerobe to waste water and handles from flowing into the deep well aeration pond behind the acidification hydrolization; Because the degree of depth of deep-well is big, the hydrostaticpressure height, dissolved oxygen concentration is big, can fast and efficiently the oxidation operation in the waste water be degraded to CO
2, H
2O, deep-well treatment solution go into second pond and carry out that solid-liquid separation, precipitating sludge are most of goes back to deep-well, acidification hydrolization pond after flowing into degassing pond and removing the microbubble that sticks on the active sludge, and unnecessary mud enters sludge thickener, mud and outward transport after the thickening; The just directly discharging up to standard of the primary water of second pond, otherwise flow into the bioactive carbon pond certainly with the need reuse water, stop 4h, under aerobic condition, utilize the Degradation of gac and microorganism, remove the organism in the waste water, treating water more after filtration, ozone oxidation, sterilization, further after the remaining objectionable impurities of oxidation removal, go into reuse pool, the pumping workshop is back to production with pressurizeing.
After adopting this invention, the every water-quality guideline of dyeing waste water Inlet and outlet water is as shown in table 2:
Table 2 water treatment effect table
| Project | The water inlet index | Effluent index |
| CODcr(mg/L) | 2108 | 32 |
| BOD5(mg/L) | 785 | 3 |
| Ss suspended solid (mg/L) | 632 | 7 |
| Total phosphorus (mg/L) | 4.7 | 0.24 |
| Ammonia nitrogen (mg/L) | 4.58 | 0.13 |
| Colourity (doubly) | 512 | 2 |
| pH | 12.1 | 8.2 |
Claims (11)
1. dyeing waste water advanced treatment and intermediate water reuse system is characterized in that: by equalizing tank (2), and coagulation basin (3), preliminary sedimentation tank (4), acidification hydrolization pond (5), deep-well (6), degassing pond (7), second pond (8), bioactive carbon pond (9), sludge thickener (10), sludge dewatering pond (11), filtering basin (12), ozone oxidation pond (13) are formed.
2. a kind of dyeing waste water advanced treatment according to claim 1 and intermediate water reuse system, it is characterized in that: described coagulation basin is the rectangle steel tendon concrete structure, and two in coagulation stirrer is installed in the pond, under stirring fast, add coagulating agent, make it to carry out coagulating with waste water.
3. a kind of dyeing waste water advanced treatment according to claim 1 and intermediate water reuse system, it is characterized in that: aeration tube is installed in the pond, described acidification hydrolization pond, make the mixing of waste water and active sludge with a small amount of aeration, and keep in the pond below the dissolved oxygen 0.2mg/L.
4. a kind of dyeing waste water advanced treatment according to claim 1 and intermediate water reuse system is characterized in that: described deep-well is the concentric(al) circles steel construction, adopts the gas circulation operation scheme.
5. a kind of dyeing waste water advanced treatment according to claim 1 and intermediate water reuse system is characterized in that: mud and sludge reflux pump are scraped in the mounting center transmission in the described second pond pond.
6. a kind of dyeing waste water advanced treatment according to claim 1 and intermediate water reuse system is characterized in that: described deep well aeration pond uses screw air compressor that deep-well is carried out the aeration oxygen supply.
7. a kind of dyeing waste water advanced treatment according to claim 1 and intermediate water reuse system, it is characterized in that: described bioactive carbon pond: waste water stopped in the pond 3-5 hour, micro-hole aerator is arranged at the bottom, pond, thick 2 meters activated carbon filtering layer is arranged at the middle part, pond, in the treating water remaining organism when the activated carbon filtering layer by activated carbon adsorption, be enriched on the activated carbon, cover with microorganism on the activated carbon simultaneously, having under the situation of dissolved oxygen, under the synergy of microorganism and activated carbon, the organism in the waste water can be removed efficiently.
8. a kind of dyeing waste water advanced treatment according to claim 1 and intermediate water reuse system, it is characterized in that: described filtering basin: interior dress quartz sand filter media, treating water passes through filtering layer from top to bottom, filtering velocity is the 5-10 meter per second, remove by filter the suspended substance (SS) for the treatment of water, the SS in the treating water is reduced to 10mg/L.
9. a kind of dyeing waste water advanced treatment according to claim 1 and middle water reusing method, it is characterized in that: described ozone oxidation pond: the pond base fabric is put titanium matter micro-hole aerator, ozone is supplied with by ozonizer, discharge micro-bubble from titanium matter micro-hole aerator and contact with pending water, ozone-containing air dissolves in the water.
10. a dyeing waste water advanced treatment and middle water reusing method comprise:
Dyeing waste water is removed in the waste water through the grid slag remover earlier and is flowed into equalizing tank behind the suspended substance of diameter greater than 1.5mm, carrying out the waste water quality water yield regulates, with sump pump waste water is lifted into coagulation basin then, and before pump, add inorganic coagulant, coagulating is carried out in stirring, through the preliminary sedimentation tank precipitate and separate, precipitating sludge is gone into coagulation basin most of time, unnecessary mud enters sludge thickener, transport outward after the thickening, primary water flows into the acidification hydrolization pond, mix with the active sludge that refluxes, under anoxia condition, the double oxygen animalcule in the active sludge carries out the acidification hydrolization effect to larger molecular organics, mixed solution carries out aerobe to waste water and handles from flowing into the deep well aeration pond behind the acidification hydrolization; The deep-well treatment solution is gone into second pond and is carried out solid-liquid separation after flowing into degassing pond and removing the microbubble that sticks on the active sludge, and precipitating sludge is most of to go back to deep-well, acidification hydrolization pond, and unnecessary mud enters sludge thickener, mud and outward transport after the thickening; The just directly discharging up to standard of the primary water of second pond, otherwise flow into the bioactive carbon pond certainly with the need reuse water, under aerobic condition, remove the organism in the waste water, treating water passes through filter, ozone oxidation pond ozone oxidation, sterilization again, further after the remaining objectionable impurities of oxidation removal, go into reuse pool, the pumping workshop is back to production with pressurizeing.
11. a kind of dyeing waste water advanced treatment according to claim 10 and middle water reusing method is characterized in that: described inorganic coagulant is a ferrous sulfate solution, and every liter of waste water consumption is 8-10mL.
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