CN102826718A - Method and device for improving oxidation efficiency of ozone-aeration biological filter combination system - Google Patents
Method and device for improving oxidation efficiency of ozone-aeration biological filter combination system Download PDFInfo
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- CN102826718A CN102826718A CN2012103398011A CN201210339801A CN102826718A CN 102826718 A CN102826718 A CN 102826718A CN 2012103398011 A CN2012103398011 A CN 2012103398011A CN 201210339801 A CN201210339801 A CN 201210339801A CN 102826718 A CN102826718 A CN 102826718A
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Abstract
The invention discloses a method and a device for improving the oxidation efficiency of an ozone-aeration biological filter combination system. The method comprises various steps including physicochemical-biochemical treatment, pipeline ozone oxidation treatment, integral ozone oxidation and biological treatment. Printing and dyeing wastewater subjected to the physicochemical-biochemical treatment is firstly conveyed to a clean water basin for regulating the water quantity, then, the partial oxidation of degradation-resistant organic substances is realized in a 5-10m ozone oxidation pipeline, finally, the wastewater is conveyed to the integral ozone-aeration biological filter for continuous oxidation, and in addition, the biological treatment is realized. The ozone adding mode combining spraying and oxidation is adopted, meanwhile, the oxidation pipeline is provided with a traverse baffle and a crossed sawtooth belt, the mass transfer efficiency of the wastewater and the ozone can be greatly improved, and the ozone oxidation efficiency is improved. In addition, through the real-time monitoring on the residual concentration of the ozone and the effluent color intensity, the phenomenon of overhigh or overlow ozone adding quantity can be avoided, the remaining time of the wastewater in an ozone contact room can also be effectively reduced, and the treatment efficiency of the system is improved.
Description
Technical field
The present invention relates to a kind of method and device that improves ozone-BAF association system oxidation efficiency, specifically relate to a kind of method and device that utilizes ozone, BAF dyeing waste water to be carried out advanced treatment.
Technical background
Dyeing waste water occupies very high ratio in the industrial wastewater discharge total amount, and chroma in waste water is dark, organic concentration is high, saltiness is big, and dye component complicacy and great majority are parent with aromatic hydrocarbons and heterogeneous ring compound in the waste water.Particularly in recent years; Develop rapidly and finishing process in printing and dye-ing development of technology along with dyestuffs industries; Anti-photodissociation, antioxidant and biorefractory organism such as PVA slurry, various New-type adjuvant and finishing composition are by increasing application, and the colourity of dyeing waste water sometimes can be up to more than 4000 times, BOD
5/ COD value but is low to moderate about 20%, and intractability continues to increase.Traditional materialization and biochemical method have been difficult to realize the reuse of dyeing waste water.
Utilization at present is the combined treatment process of ozone oxidation and BAF more widely, can improve the clearance of hardly degraded organic substance to a certain extent, and the reduction chroma in waste water obviously improves effluent quality.But also there is certain shortcoming in existing process integration, and for example: the ozone adding equipment current consumption of patent CN101700944A is big, and BAF needs again aeration to be unfavorable for the saving of cost so that the mikrobe oxygen source to be provided; Patent CN100494103C, patent CN101376556B do not monitor ozone residual concentration, tail water colourity in real time, are unfavorable for improving the utilization ratio of ozone, are unfavorable for shortening the reaction times of ozone; Patent CN101538102A, patent CN201825822U need ozone tail gas is handled, and simultaneously BAF are needed aeration again, increase extra energy consumption.
Summary of the invention
There is the low problem of ozone utilization rate to existing ozone oxidation and BAF combined treatment process, the invention provides a kind of method that can improve ozone-BAF association system oxidation efficiency.
The present invention also provides the device of realizing aforesaid method.
The present invention is achieved through following technical scheme:
A kind of method that improves ozone-BAF association system oxidation efficiency; Comprise materialization-biochemistry processing, pipeline ozone oxide treatment, integrated ozone oxidation and biological treatment; Wherein materialization-biochemistry is handled, integrated ozone oxidation and biological treatment all adopt existing techniques in realizing, pipeline ozone oxide treatment and belong to for innovative point of the present invention with the combination treatment method of integrated ozone-BAF.Be specially: the dyeing waste water of handling through materialization-biochemistry is sent to the clean water basin regulating pondage earlier; Guarantee that waste water is than stable flow rate and pH value;, length realizes the partially oxidation of waste water hardly degraded organic substance then in being the ozone oxidation pipeline of 5-10m; Be sent to integrated ozone-BAF at last and continue oxidation, and realize biological treatment.
Said pipeline ozone oxide treatment is meant at the ozone oxidation pipeline utilizes ejector to realize mixing of ozone and waste water; Said ejector exit is provided with two traverse baffles, is inserted with the intersection saw tooth belt in the said ozone oxidation pipeline, to promote mixing of ozone and waste water, improves mass-transfer efficiency, the oxidation efficiency of raising ozone.Ozone adds the position and is divided into two places, and a place is the front end of ozone oxidation pipeline, through ejector, adopts the mode of spraying; Another place is the bottom at integrated ozone-BAF, adopts the mode of aeration to add ozone.The position that adds of ozone is divided into above-mentioned two places, adopt to spray and mode that aeration combines, can improve the oxidation efficiency of ozone greatly.
In said integrated ozone-BAF, BAF does not need extra installation aerating system that process air is provided, and can directly utilize oxygen that ozone brings into for the mikrobe of biological filter oxygen source to be provided.
The total dosage of said ozone is a 10-20mg/L waste water, and the dosage of said integrated ozone-BAF bottom ozone accounts for 1/3 of total dosage; The colourity that the dosage of said ozone is monitored integrated ozone-BAF water outlet in real time according to supervisory system is regulated; The colourity of said water outlet should be lower than 5 times.
In said integrated ozone-BAF, the reaction times of ozone and waste water is 0.5 ~ 2 hour, and the said reaction times is specifically regulated according to the ozone residual concentration that supervisory system is monitored BAF filter plate water inlet in real time; Control ozone residual concentration is at 0.1 ~ 0.15mg/L.
Realize the device of the inventive method; It is characterized in that, comprise clean water basin, waste water valve, water pump, ejector, long ozone oxidation pipeline, integrated ozone-BAF, ozonizer, ozone valve 61, ozone valve 62 and the supervisory system of 5-10m.Said clean water basin are communicated with ejector via waste water valve, water pump, and ejector is communicated with ozonizer through ozone valve 61, and ejector also is connected with the ozone oxidation pipeline, and the ozone oxidation pipeline is communicated with integrated ozone-BAF; The aeration plate of said integrated ozone-BAF bottom connects via ozone valve 62 and ozonizer; Said supervisory system and ozone valve 61, ozone valve 62, the water outlet that is located at integrated ozone-BAF upper end, the filter plate that is arranged at integrated ozone-BAF middle part are connected.Said supervisory system is monitored filter plate water inlet and integrated ozone-BAF water outlet in real time.
Realize mixing of ozone and waste water at said ejector; Said ejector exit is provided with two traverse baffles, is inserted with the intersection saw tooth belt in the said 5-10m ozone oxidation pipeline, to promote mixing of ozone and waste water, improves mass-transfer efficiency, the oxidation efficiency of raising ozone.The ozone of said integrated ozone-BAF bottom adopts the mode of aeration to drop in the waste water.The aeration aperture of the aeration plate 511 of said integrated ozone-BAF 5 bottoms is smaller or equal to 3mm; Said solarization air cap is towards flowing to relatively with waste water, to improve the mass-transfer efficiency of waste water and ozone.
The present invention compared with prior art has following advantage:
(1) mode that adopts injection and aeration to combine is brought the degree of mixing that increases waste water and ozone through traverse baffle and interior slotting intersection sawtooth simultaneously, improves both mass-transfer efficiency, can improve the oxidation efficiency of ozone greatly.
(2) through automatic monitored control system ozone residual concentration and effluent color dilution are monitored in real time, both can have been avoided ozone dosage phenomenon higher or on the low side, also can effectively reduce the residence time of waste water, improve the treatment rate of system in the ozone exposure chamber.
Description of drawings:
Fig. 1 is the flow chart of steps of the inventive method.
Fig. 2 is the structural representation of apparatus of the present invention.
Fig. 3 is ozone oxidation pipeline configuration figure among the present invention.
Embodiment:
Below be to further specify to of the present invention, rather than limitation of the present invention.
Provide the embodiment of the process method of textile printing and dyeing wastewater advanced treatment and reclamation shown in Figure 1 below.
It is as shown in Figure 1 that the present invention improves the flow chart of steps of method of ozone-BAF association system oxidation efficiency.May further comprise the steps: the dyeing waste water of handling through materialization-biochemistry is sent to the clean water basin regulating pondage earlier; Guarantee that waste water is than stable flow rate and pH value; In the ozone oxidation pipeline of 5-10m, realize the partially oxidation of waste water hardly degraded organic substance then; Be sent to integrated ozone-BAF at last and continue oxidation, and realize biological treatment.
Two places are divided in the position that adds of said ozone: the one, and the front end of 5-10m ozone oxidation pipeline (adopting the mode of spraying); Another is the bottom (adopting the mode of aeration) of integrated ozone-BAF.
The total dosage of said ozone is a 10-20mg/L waste water, and wherein the dosage of integrated ozone-BAF bottom ozone is 1/3 of total dosage; The colourity that the concrete dosage of ozone is monitored integrated ozone-BAF water outlet in real time according to supervisory system is regulated; Said effluent color dilution should be lower than 5 times.
In said integrated ozone-BAF, the reaction times of ozone and waste water is 0.5 ~ 2 hour, and the ozone residual concentration of specifically monitoring BAF filter plate water inlet in real time according to supervisory system is regulated; Said ozone residual concentration is controlled at 0.1 ~ 0.15mg/L.
In said integrated ozone-BAF, BAF need not installed the aerating system oxygen supply, can directly utilize oxygen that ozone brings into for the mikrobe of biological filter oxygen source to be provided.
The device synoptic diagram of realizing the inventive method is as shown in Figure 2, comprises clean water basin 1, waste water valve 2, water pump 3, ejector 4,5-10m ozone oxidation pipeline 7, integrated ozone-BAF 5, ozonizer 6, ozone valve 61, ozone valve 62 and supervisory system.Said clean water basin 1 are communicated to ejector 4 through waste water valve 2, water pump 3, and ejector 4 is communicated with ozonizer 6 through ozone valve 61 in addition, and said ejector 4 also is connected with ozone oxidation pipeline 7.Ozone oxidation pipeline 7 is communicated with integrated ozone-BAF 5; Integrated ozone-BAF 5 is communicated with ozonizer 6 through ozone valve 62; Said supervisory system is connected with ozone valve 61, ozone valve 62 respectively, and filter plate 522 water inlets and 5 water outlets of integrated ozone-BAF are monitored in real time.
Realize mixing of ozone and waste water at said ejector 4; As shown in Figure 3; Ozone oxidation pipeline 7 length are 5-10m; With the ozone oxidation pipeline 7 of ejector 4 ozone import upright position in two traverse baffles 71 are set, in ozone oxidation pipeline 7, be inserted with dismountable intersection saw tooth belt 72 simultaneously, to promote mixing of ozone and waste water; Improve mass-transfer efficiency, improve the oxidation efficiency of ozone.The ozone of integrated ozone-BAF 5 bottoms adopts the mode of aeration to drop in the waste water.Said aeration aperture is smaller or equal to 3mm; Said solarization air cap is towards flowing to relatively with waste water, to improve mass-transfer efficiency.
Illustrate the actual mechanical process of present method and device below.
Certain printing and dyeing mill's comprehensive wastewater, after conventional materialization-biochemistry was handled, waste water ph was 7.1, and water outlet COD is 101.9mg/L, and turbidity is 8.2NTU, and SS is 22.3mg/L, ammonia nitrogen is 7.94mg/L, 61 times of colourities.Practical implementation is following:
(1) from clean water basin 1 waste water that comes out, get into ejectors 4 through waste water valve 2 and water pump 3, contact with ozone at ejector 4, then in ozone oxidation pipeline 7 generation oxidizing reactions, with most of hardly degraded organic substance oxidative degradation in the waste water.In the present embodiment, ozone oxidation pipeline 7 is 8m.With the ozone oxidation pipeline 7 of said ejector 4 ozone import upright position in two traverse baffles 71 are set, a dismountable intersection saw tooth belt 72 is set, to improve the mass-transfer efficiency of ozone and waste water in said ozone oxidation pipeline 7.
(2) directly be sent to integrated ozone-BAF 5 and carry out ozone oxidation and biological treatment from ozone oxidation pipeline 7 waste water that comes out, continuing to destroy the structure of hardly degraded organic substance, and remove pollutents such as COD, ammonia nitrogen and colourity.In integrated ozone-BAF 5, the mode of utilizing aeration is added to the aeration plate 511 of integrated ozone-BAF 5 bottoms with 1/3 ozone, and 51 realize ozone oxidation in the ozone oxidation district.
(3) in integrated ozone-BAF 5; Utilize supervisory system monitoring aeration tank effluent color dilution earlier; If colourity is lower than 5 times; Then reduce the ozone dosage, then increase the ozone dosage through ozone valve 61 and ozone valve 62 if colourity is higher than 5 times through ozone valve 61 and ozone valve 62; Utilize the ozone residual concentration of supervisory system monitoring BAF filter plate 522 water inlets then; If the concentration of ozone is lower than 0.1mg/L; Then shorten the ozone reaction time,, then prolong the ozone reaction time if the ozone residual concentration of filter plate 522 water inlets is higher than 0.15mg/L; If the ozone residual concentration of filter plate 522 water inlet is between 0.1mg/L ~ 0.15mg/L, the reaction times that then remains unchanged.
(4) in this case study on implementation, after 5 oxidations of integrated ozone-BAF and biochemical treatment, COD reduces to 27.9mg/L; Turbidity is reduced to 4.3NTU, and SS reduces to 6.2mg/L, and ammonia nitrogen is reduced to 0.758mg/L; Colourity is reduced to 3.5 times, and the oxidization time of ozone is 57min.
The foregoing description is to the specifying of possible embodiments of the present invention, and this embodiment is not in order to limiting claim of the present invention, and the equivalence that all the present invention of disengaging do is implemented or change, all should be contained in the claim of this case.
Claims (7)
1. method that improves ozone-BAF association system oxidation efficiency; Comprise materialization-biochemistry processing, pipeline ozone oxide treatment, integrated ozone oxidation and biological treatment step; It is characterized in that the dyeing waste water of handling through materialization-biochemistry is sent to the clean water basin regulating pondage earlier, in length is the ozone oxidation pipeline of 5-10m, realize the partially oxidation of waste water hardly degraded organic substance then; Be sent to integrated ozone-BAF at last and continue oxidation, and realize biological treatment.
2. the method for raising ozone according to claim 1-BAF association system oxidation efficiency; It is characterized in that; Ozone adds the position and is divided into two places, and a place is the pipeline ozone oxide treatment, is meant at the ozone oxidation pipeline to utilize ejector to realize mixing of ozone and waste water; The ejector exit is provided with two traverse baffles, is inserted with the intersection saw tooth belt in the ozone oxidation pipeline; Another place is the bottom at integrated ozone-BAF; Adopt the mode of aeration to add ozone; The mikrobe that the oxygen that ozone is brought into can be integrated ozone-BAF provides oxygen source, and not needing to install in addition aerating system is that BAF provides process air.
3. the method for raising ozone according to claim 2-BAF association system oxidation efficiency; It is characterized in that; The total dosage of said ozone is a 10-20mg/L waste water, and the dosage of said integrated ozone-BAF bottom ozone accounts for 1/3 of total dosage; The colourity that the dosage of said ozone is monitored integrated ozone-BAF water outlet in real time according to supervisory system is regulated; The colourity of said water outlet should be lower than 5 times.
4. the method for raising ozone according to claim 2-BAF association system oxidation efficiency; It is characterized in that; Said integrated ozone-BAF; The reaction times of ozone and waste water is 0.5 ~ 2 hour, and the ozone residual concentration that the said reaction times is monitored the water inlet of BAF filter plate in real time according to supervisory system is regulated; Said ozone residual concentration is controlled at 0.1 ~ 0.15mg/L.
5. device of realizing claim 1 method; It is characterized in that, comprise clean water basin [1], waste water valve [2], water pump [3], ejector [4], ozone oxidation pipeline [7], integrated ozone-BAF [5], ozonizer [6], ozone valve [61], ozone valve [62] and supervisory system; Said clean water basin [1] are communicated with ejector [4] via waste water valve [2], water pump [3]; Said ejector [4] is communicated with ozonizer [6] through ozone valve [61]; Said ejector [4] also is connected with ozone oxidation pipeline [7]; Said ozone oxidation pipeline [7] is communicated with integrated ozone-BAF [5]; The aeration plate [511] of said integrated ozone-BAF [5] bottom is connected [6] via ozone valve [62] and is communicated with ozonizer; Said supervisory system and ozone valve [61], ozone valve [62], the water outlet that is located at integrated ozone-BAF [5] upper end, the filter plate [522] that is arranged at integrated ozone-BAF [5] middle part are connected.
6. device according to claim 5; It is characterized in that; In the ozone oxidation pipeline [7] that is communicated with ejector [4] outlet, two traverse baffles [71] are set, ozone oxidation pipeline [7] length is 5 ~ 10m, is inserted with dismountable intersection saw tooth belt [72] in the ozone oxidation pipeline [7].
7. device according to claim 5 is characterized in that, the aeration aperture of the aeration plate [511] of said integrated ozone-BAF [5] bottom is smaller or equal to 3mm; Said solarization air cap is towards flowing to relatively with waste water, to improve the mass-transfer efficiency of waste water and ozone.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435218A (en) * | 2013-08-09 | 2013-12-11 | 中持（北京）水务运营有限公司 | Comprehensive emergency treatment method for ozone-BAF (Biological Aerated Filter) |
| CN112661348A (en) * | 2020-12-02 | 2021-04-16 | 苏州清然环保科技有限公司 | Treatment method and treatment system for printing and dyeing wastewater |
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| DE4308159A1 (en) * | 1993-03-15 | 1994-09-22 | Philipp Mueller Gmbh | Process for decreasing the COD load in wastewater |
| JPH07185546A (en) * | 1993-12-27 | 1995-07-25 | Ataka Kogyo Kk | Purifying treatment of sewage |
| CN101050016A (en) * | 2007-01-28 | 2007-10-10 | 大连海事大学 | Method for treating dyeing wastewater in transfer piping by ozone |
| CN101070216A (en) * | 2007-06-18 | 2007-11-14 | 华南理工大学 | Integrated ozone and aeration biological filtering pool water treatment apparatus and method |
| CN101700944A (en) * | 2009-09-16 | 2010-05-05 | 汤苏云 | Method for increasing utilization rate of ozone jointly processing waste water with biological aerated filter |
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2012
- 2012-09-13 CN CN201210339801.1A patent/CN102826718B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4308159A1 (en) * | 1993-03-15 | 1994-09-22 | Philipp Mueller Gmbh | Process for decreasing the COD load in wastewater |
| JPH07185546A (en) * | 1993-12-27 | 1995-07-25 | Ataka Kogyo Kk | Purifying treatment of sewage |
| CN101050016A (en) * | 2007-01-28 | 2007-10-10 | 大连海事大学 | Method for treating dyeing wastewater in transfer piping by ozone |
| CN101070216A (en) * | 2007-06-18 | 2007-11-14 | 华南理工大学 | Integrated ozone and aeration biological filtering pool water treatment apparatus and method |
| CN101700944A (en) * | 2009-09-16 | 2010-05-05 | 汤苏云 | Method for increasing utilization rate of ozone jointly processing waste water with biological aerated filter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435218A (en) * | 2013-08-09 | 2013-12-11 | 中持（北京）水务运营有限公司 | Comprehensive emergency treatment method for ozone-BAF (Biological Aerated Filter) |
| CN112661348A (en) * | 2020-12-02 | 2021-04-16 | 苏州清然环保科技有限公司 | Treatment method and treatment system for printing and dyeing wastewater |
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