CN105174433A - Down-flow ozone biological aerated filter device and wastewater treatment method - Google Patents
Down-flow ozone biological aerated filter device and wastewater treatment method Download PDFInfo
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- CN105174433A CN105174433A CN201510708425.2A CN201510708425A CN105174433A CN 105174433 A CN105174433 A CN 105174433A CN 201510708425 A CN201510708425 A CN 201510708425A CN 105174433 A CN105174433 A CN 105174433A
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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
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a down-flow ozone biological aerated filter device. The device comprises a sealing tower, and the sealing tower comprises a catalytic ozonation region (5), a biological aerated filter region (9) and a water outlet region (10) from top to bottom in a sequential connection mode. A water outlet (7) is formed in the lower portion of the water outlet region (10), a water distribution pipe (4) is arranged on the upper portion of the catalytic ozonation region (5), and an ozone aeration disc (17) is arranged on the lower portion of the catalytic ozonation region (5). An aeration pipe (18) is arranged on the lower portion of the water outlet region (10). The invention further discloses a treatment method adopting the down-flow ozone biological aerated filter device for petrifying the wastewater. The technology is compact, composition is reasonable, occupied area can be reduced, the operation cost is lowered, and bad influences on the biological aerated filter of residual ozone in the discharged ozonized water are eliminated.
Description
Technical field
The present invention relates to advanced treatment of wastewater technical field, particularly relate to and a kind ofly fall the ozonation aerated bacteria filter device of streaming and adopt this device to carry out the method for wastewater treatment.
Background technology
Petrochemical industry is one of mainstay industry of China.A trend of current China petrochemical industry development is that side planning is assembled, and according to statistics, by the end of " 12 " end, China has 390, inter-provincial above petrochemical industrial park.For large-scale petrochemical industrial park, composite wastewater treatment plant is last one barrier ensureing petrochemical industry comprehensive wastewater process qualified discharge.On April 16th, 2015, Environmental Protection Department promulgated " petrochemical industry pollutant emission standard " (GB31571-2015) (hereinafter referred to as new standard), the COD limit value of in line for petrochemical industrial park sewage work water is increased to 60mg/L by the 100mg/L of regulation in " integrated wastewater discharge standard " (GB8978-1996) originally performed by new standard, higher in territorial development density, environmental bearing capacity starts to weaken, or water environment capacity is less, ecological environment frailty, the serious water environment pollution problem of easy generation and need the area of taking special protection measure, COD emission limit is 50mg/L.Meanwhile, except more strict to conventional index emission limit in new standard, 60 kinds of (class) characteristic organic pollutants emission concentration limits are also added.Our current petrochemical industry composite wastewater factory sewage all cannot meet the requirement of new standard, needs badly and proposes mark transformation, improve effluent quality.
The advanced treatment of wastewater technical research of technical feasibility economical rationality is one of focus of current sewage treatment area.Because the biochemical of petrifaction sewage factory two stage biological process water outlet is poor, adopt separately biochemical processing to be difficult to up to standard, the treatment technology of materialization and biochemical combination is the type of skill conventional in advanced treatment of wastewater.
BAF is a kind of common sewerage advanced treatment process, has the features such as floor space is little, sludge yield is few, obtains extensive application, have accumulated a large amount of design variable and service experience in actual sewage advanced treatment engineering.BAF is by biological degradation, adsorption filtration, the purification of solid-liquid separation method realization to secondary effluent.Because BAF can only get rid of biodegradable organism in waste water usually, the treatment effect of this technique of application to the organic wastewater containing solvability difficult for biological degradation is often not good separately.Need in conjunction with other materializing strategy technique.
Ozone is the extremely strong oxygenant of a kind of oxidation capacity, and by direct or indirect reaction, the hardly degraded organic substance in waste water can be decomposed into the organism of micromolecular easy degraded by ozone, or is carbonic acid gas and water by thorough for organism mineralising.Ozone and BAF are used in conjunction, and can give full play to the feature of two unit, and ozone water outlet enters BAF process, effectively improves effluent quality.But dissolve unreacted ozone containing finite concentration in ozone oxidation water outlet, directly enter BAF and can produce killing action to microorganism wherein, reduce the treatment effect of BAF.The mode that current ozonation aerated biological filter is run, ozone oxidation water outlet needs first through aeration stripping residue ozone, and then enters BAF process, and the structure of such reactor is comparatively loose, and floor space is also comparatively large, adds cost of investment.For overcoming above-mentioned shortcoming, a kind of method of falling streaming one ozonation aerated biological filter process petrochemical wastewater of invention.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of compact construction, forms rational coupling depth treatment technology, and namely the ozonation aerated bacteria filter device of streaming falls in one.
The ozonation aerated bacteria filter device of streaming falls in one, comprising:
Seal tower, described seal tower comprises catalytic ozonation district connected successively from top to bottom, BAF district and exhalant region; The bottom of described exhalant region is provided with water outlet; The top in described catalytic ozonation district is provided with water distributing pipe, and bottom is provided with ozonation aerated dish; The bottom of described exhalant region is provided with aeration tube;
Water tank, is connected with described water distributing pipe by water inlet pipe;
Ozonizer, is connected with described ozonation aerated dish by ozone transfer lime;
Air supplying device, is connected with described aeration tube by air delivery pipe.
The aeration of BAF is positioned at supporting layer bottom, bottom, and after BAF process, water outlet is discharged from bottom.Two unit organic coupling, waste water, through aeration stripping, can to reduce in waste water residue ozone to the impact of BAF.Present invention process is compact, and composition rationally, can reduce floor space, saves running cost, to overcome in ozone oxidation water outlet residue ozone to the disadvantageous effect of BAF.
Of the present inventionly fall the ozonation aerated bacteria filter device of streaming, also comprise ozone breaker, be connected with the top of described seal tower.
Of the present invention the ozonation aerated bacteria filter device of streaming falls, also comprise backwash tube, be connected with the bottom of described seal tower, described backwash tube is provided with backwashing pump and back flushing under meter, the top in described catalytic ozonation district is provided with back flushing water port.
Of the present invention the ozonation aerated bacteria filter device of streaming falls, wherein, described water inlet pipe is provided with intake pump and feed water flow measuring device, described ozone transfer lime is provided with ozone gas flow meter, described air supplying device is gas blower, and described air delivery pipe is provided with aerating gas under meter.
Of the present inventionly fall the ozonation aerated bacteria filter device of streaming, wherein, the volume ratio in described catalytic ozonation district and described BAF district is 1:3.
Of the present inventionly fall the ozonation aerated bacteria filter device of streaming, wherein, the filler in described catalytic ozonation district is carrying transition metal oxide compound, as Al
2o
3or the solid particle catalyst of CuO, particle diameter is 2-5mm, and filling ratio is 75%; Filler in described BAF is haydite, and particle diameter is 3-5mm, filling ratio 80%.
Adopt and of the present inventionly fall the treatment process that the ozonation aerated bacteria filter device of streaming carries out petrochemical wastewater, comprise the steps: the water distributing pipe pending waste water in water tank being entered into seal tower top through intake pump, and enter catalytic ozonation district, contact with the ozone entered bottom described catalytic ozonation district is reverse, waste water flows downward under gravity and enters BAF district, water outlet after treatment collects from exhalant region, bottom, carry out Air Exposure in described exhalant region, discharge from water outlet after process; Meanwhile, ozone breaker destroys unnecessary ozone, and described pending waste water is the secondary effluent after petrochemical wastewater biological treatment, and COD is not higher than 100mg/L.
The treatment process of petrochemical wastewater of the present invention, wherein, described seal tower carries out back flushing process after running for some time, and clear water is entered in described seal tower from backwash tube by backwashing pump, and discharges from back flushing water port.
The treatment process of petrochemical wastewater of the present invention, wherein, the void tower hydraulic detention time of described pending waste water is 4h.
The treatment process of petrochemical wastewater of the present invention, wherein, the ozone dosage in described catalytic ozonation district is 10mg/L, and filler is carrying transition metal oxide compound, as Al
2o
3or the solid particle catalyst of CuO, particle diameter is 2-5mm, and filling ratio is 75%; The gas-water ratio of described BAF is 2:1, and filler is haydite, and particle diameter is 3-5mm, and filling ratio is 80%.
The present invention falls the ozonation aerated bacteria filter device difference from prior art of streaming and is:
It is tower structure that the ozonation aerated bacteria filter device of streaming falls in the present invention, method of wastewater treatment faces according to petrifaction sewage treatment plant the technical need proposing mark transformation, certain density residue ozone is contained in traditional ozone-biological aerated filter process ozone water outlet, can affect to BAF unit, or need to increase stripping pond, increase the problem of floor space, a kind of integrated ozone-BAF the combination process proposed, catalytic ozonation is placed in the top of BAF, utilize the aeration of BAF that the ozone in waste water is carried out stripping, reduce the impact on BAF.The present invention can make two unit organically combine, larger molecular organics, by hardly degraded organic substance Partial digestion in waste water, is oxidized to small organic molecule by ozone unit, improves the biodegradability of waste water, utilize BAF aeration simultaneously, the ozone stripping remained in waste water is gone out; Ozone water outlet enters BAF unit, by biological degradation, retains and the effect such as precipitation, further degrades to waste water.In this combination process, BAF is the formant that hardly degraded organic substance is removed.Prove through research and practical application, adopt device described in present invention process and corresponding ozone dosage, reaction times, air water when packing ratio, after process, better, overall operation expense is low, adopts other parameter cannot reach effect of the present invention for water quality.
Compared with prior art, the present invention has following characteristics:
1) ozone dosage is few, and in view of petrochemical industry secondary effluent COD is usually between 80-100mg/L, ozone dosage is the effect that 10mg/L can reach preoxidation, and running cost is lower, and traditional catalytic ozonation technique ozone dosage is higher than 30mg/L usually.
2) ozone catalytic oxidation unit adopts the form of solid catalyst heterogeneous catalytic oxidation, and the existence of catalyzer improves the utilization ratio of ozone, and simultaneous reactions speed is very fast, and ozone amount residual in waste water is less.
3) BAF can have the effect of stripping to ozone residual in ozone catalytic oxidation unit waste water, reduces its impact on microorganism in BAF.
4) ozone catalytic oxidation unit plays preoxidation effect, and follow-up BAF unit is the maximum removal unit of hardly degraded organic substance, can save the working cost of whole technique.
5) ozone catalytic oxidation unit is together with BAF element coupling, reduces floor space and cost of investment.
Know-why of the present invention is as follows:
The method of falling streaming one ozonation aerated biological filter process petrochemical wastewater is the technique be integrated by the combine with technique such as catalytic ozonation, bio-oxidation and precipitation adsorption.Utilize the catalysed oxidn of ozone, when ozone dosage is less, the organism of solvability difficult degradation in preliminary exposition petrochemical industry secondary effluent and other reducing substanceses, make to be difficult to biodegradable organism short chain, open loop, can be biodegradable, increase the organic content that can be utilized by microorganism in waste water.BAF is placed in below ozone catalytic oxidation unit, can carry out stripping, reduce the murder by poisoning to microorganism in BAF in aeration process to ozone residual in waste water.Discussion of Biological Aerated Filter Medium can dissolved organic matter in planar water, simultaneously also can microorganism in enrichment water.The large amount of organic of filter material surface absorption is also for microorganism provides good living environment.Under having the environment of abundant dissolved oxygen, microorganism take organism as nutriment existence and breeds, also make filter material surface be regenerated simultaneously, thus there is the ability continuing adsorb organic compound, namely substantially prolongs the regeneration period of filtrate, also improve the degradation capability of microorganism to dissolved organic matter in waste water.
Below in conjunction with accompanying drawing, the ozonation aerated bacteria filter device of streaming that falls of the present invention is described further.
Accompanying drawing explanation
Fig. 1 is the structural representation that the ozonation aerated bacteria filter device of streaming falls in the present invention;
Fig. 2 is the Inlet and outlet water COD variation diagram processing certain petrifaction sewage factory secondary effluent in the embodiment of the present invention 3.
Embodiment
Embodiment 1
The ozonation aerated bacteria filter device of streaming falls in one, comprising:
Seal tower, seal tower comprises catalytic ozonation district 5 connected successively from top to bottom, BAF district 9 and exhalant region 10; The bottom of exhalant region 10 is provided with water outlet 7; The top in catalytic ozonation district 5 is provided with water distributing pipe 4, and bottom is provided with ozonation aerated dish 17; The bottom of exhalant region 10 is provided with aeration tube 18;
Water tank 1, is connected with water distributing pipe 4 by water inlet pipe;
Ozonizer 16, is connected with ozonation aerated dish 17 by ozone transfer lime;
Air supplying device 15, is connected with aeration tube 18 by air delivery pipe.
Of the present inventionly fall the ozonation aerated bacteria filter device of streaming, also comprise ozone breaker 13, be connected with the top of seal tower; Apparatus of the present invention also comprise backwash tube, are connected with the bottom of seal tower, backwash tube is provided with backwashing pump 3 and back flushing under meter 12, the top in catalytic ozonation district 5 is provided with back flushing water port 8.
Water inlet pipe is provided with intake pump 2 and feed water flow measuring device 6, ozone transfer lime is provided with ozone gas flow meter 14, air supplying device 15 is gas blower, and air delivery pipe is provided with aerating gas under meter 11; The volume ratio in catalytic ozonation district 5 and BAF district 9 is 1:3; Filler in catalytic ozonation district 5 is carrying transition metal oxide compound, as Al
2o
3or the solid particle catalyst of CuO, particle diameter is 2-5mm, and filling ratio is 75%; Filler in BAF 9 is haydite, and particle diameter is 3-5mm, filling ratio 80%.
Embodiment 2
Adopt in embodiment 1 and fall the treatment process that the ozonation aerated bacteria filter device of streaming carries out petrochemical wastewater, comprise the steps: the water distributing pipe 4 pending waste water in water tank 1 being entered into seal tower top through intake pump 2, and enter catalytic ozonation district 5, contact with the ozone entered bottom catalytic ozonation district 5 is reverse, waste water flows downward under gravity and enters BAF district 9, water outlet after treatment collects from exhalant region, bottom 10, carry out Air Exposure in exhalant region 10, discharge from water outlet 7 after process; Meanwhile, ozone breaker 13 destroys unnecessary ozone, and pending waste water is the secondary effluent after petrochemical wastewater biological treatment, and COD is not higher than 100mg/L.
Seal tower carries out back flushing process after running for some time, and clear water is entered in seal tower from backwash tube by backwashing pump 3, and discharges from back flushing water port 8; The void tower hydraulic detention time of pending waste water is 4h.
Ozone dosage in catalytic ozonation district 5 is 10mg/L, and filler is carrying transition metal oxide compound, as Al
2o
3or the solid particle catalyst of CuO, particle diameter is 2-5mm, and filling ratio is 75%; The gas-water ratio of BAF 9 is 2:1, and filler is haydite, and particle diameter is 3-5mm, and filling ratio is 80%.
Embodiment 3
As shown in Figure 2, certain large-scale petrochemical industrial park composite wastewater treatment plant secondary effluent, water outlet COD lower than 100mg/L, average out to 83.5mg/L, BOD
5/ COD is lower than 0.1, biodegradability is very poor, water outlet cannot meet new standard, for improving effluent quality further, adopt method of the present invention to process, adopt the volume ratio of integrated tower ozone unit and BAF unit to be 1:3, total void tower residence time 4h, ozone dosage is 10mg/L, and catalyzer is load Al
2o
3solid particle catalyst, filling ratio is 75%, and BAF gas-water ratio is 3:1, and filler is the haydite of diameter 3-5mm.Water outlet COD average out to 49.5mg/L after process, can reach the requirement of new standard.
Above embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (10)
1. fall the ozonation aerated bacteria filter device of streaming, it is characterized in that: comprising:
Seal tower, described seal tower comprises catalytic ozonation district (5) connected successively from top to bottom, BAF district (9) and exhalant region (10); The bottom of described exhalant region (10) is provided with water outlet (7); The top of described catalytic ozonation district (5) is provided with water distributing pipe (4), and bottom is provided with ozonation aerated dish (17); The bottom of described exhalant region (10) is provided with aeration tube (18);
Water tank (1), is connected with described water distributing pipe (4) by water inlet pipe;
Ozonizer (16), is connected with described ozonation aerated dish (17) by ozone transfer lime;
Air supplying device (15), is connected with described aeration tube (18) by air delivery pipe.
2. according to claim 1ly fall the ozonation aerated bacteria filter device of streaming, it is characterized in that: also comprise ozone breaker (13), be connected with the top of described seal tower.
3. according to claim 2 the ozonation aerated bacteria filter device of streaming falls, it is characterized in that: also comprise backwash tube, be connected with the bottom of described seal tower, described backwash tube is provided with backwashing pump (3) and back flushing under meter (12), the top of described catalytic ozonation district (5) is provided with back flushing water port (8).
4. according to claim 3 the ozonation aerated bacteria filter device of streaming falls, it is characterized in that: on described water inlet pipe, be provided with intake pump (2) and feed water flow measuring device (6), described ozone transfer lime is provided with ozone gas flow meter (14), described air supplying device (15) is gas blower, and described air delivery pipe is provided with aerating gas under meter (11).
5. according to claim 1ly fall the ozonation aerated bacteria filter device of streaming, it is characterized in that: the volume ratio in described catalytic ozonation district (5) and described BAF district (9) is 1:3.
6. according to claim 1ly fall the ozonation aerated bacteria filter device of streaming, it is characterized in that: the filler in described catalytic ozonation district (5) is carrying transition metal oxide compound, and described carrying transition metal oxide compound is Al
2o
3or the solid particle catalyst of CuO, particle diameter is 2-5mm, and filling ratio is 75%; Filler in described BAF (9) is haydite, and particle diameter is 3-5mm, filling ratio 80%.
7. adopt and fall the treatment process that the ozonation aerated bacteria filter device of streaming carries out petrochemical wastewater described in claim 1 ~ 6, it is characterized in that: comprise the steps:
Pending waste water in water tank (1) is entered into the water distributing pipe (4) on seal tower top through intake pump (2), and enter catalytic ozonation district (5), the ozone entered with described catalytic ozonation district (5) bottom is reverse to be contacted, waste water flows downward under gravity and enters BAF district (9), water outlet after treatment collects from exhalant region, bottom (10), carry out Air Exposure in described exhalant region (10), discharge from water outlet (7) after process; Meanwhile, ozone breaker (13) destroys unnecessary ozone, and described pending waste water is the secondary effluent after petrochemical wastewater biological treatment, and COD is not higher than 100mg/L.
8. the treatment process of petrochemical wastewater according to claim 7, it is characterized in that: described seal tower carries out back flushing process after running for some time, clear water is entered in described seal tower from backwash tube by backwashing pump (3), and discharges from back flushing water port (8).
9. the treatment process of petrochemical wastewater according to claim 7, is characterized in that: the void tower hydraulic detention time of described pending waste water is 4h.
10. the treatment process of petrochemical wastewater according to claim 7, is characterized in that: the ozone dosage in described catalytic ozonation district (5) is 10mg/L, and filler is carrying transition metal oxide compound, and described carrying transition metal oxide compound is Al
2o
3or the solid particle catalyst of CuO, particle diameter is 2-5mm, and filling ratio is 75%; The gas-water ratio of described BAF (9) is 2:1, and filler is haydite, and particle diameter is 3-5mm, and filling ratio is 80%.
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| CN201510708425.2A CN105174433A (en) | 2015-10-27 | 2015-10-27 | Down-flow ozone biological aerated filter device and wastewater treatment method |
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| CN201510708425.2A CN105174433A (en) | 2015-10-27 | 2015-10-27 | Down-flow ozone biological aerated filter device and wastewater treatment method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105668881A (en) * | 2016-03-16 | 2016-06-15 | 湖南京明环保科技有限公司 | Wastewater treatment system containing ammonia nitrogen |
| CN105819629A (en) * | 2016-05-25 | 2016-08-03 | 中国环境科学研究院 | Coupled type waste water treatment device and treatment method of petrochemical secondary effluent |
| CN106927617A (en) * | 2015-12-29 | 2017-07-07 | 广东卓信环境科技股份有限公司 | The integrated device and its method of a kind of sewage disposal |
| CN110002576A (en) * | 2019-04-24 | 2019-07-12 | 中冶赛迪工程技术股份有限公司 | A kind of catalytic ozonation reactor and its sewage water treatment method |
-
2015
- 2015-10-27 CN CN201510708425.2A patent/CN105174433A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106927617A (en) * | 2015-12-29 | 2017-07-07 | 广东卓信环境科技股份有限公司 | The integrated device and its method of a kind of sewage disposal |
| CN105668881A (en) * | 2016-03-16 | 2016-06-15 | 湖南京明环保科技有限公司 | Wastewater treatment system containing ammonia nitrogen |
| CN105668881B (en) * | 2016-03-16 | 2018-07-27 | 湖南京明环保科技有限公司 | Wastewater treatment system containing ammonia nitrogen |
| CN105819629A (en) * | 2016-05-25 | 2016-08-03 | 中国环境科学研究院 | Coupled type waste water treatment device and treatment method of petrochemical secondary effluent |
| CN105819629B (en) * | 2016-05-25 | 2019-04-23 | 中国环境科学研究院 | A kind of processing method of manifold type wastewater treatment equipment and petrochemical industry secondary effluent |
| CN110002576A (en) * | 2019-04-24 | 2019-07-12 | 中冶赛迪工程技术股份有限公司 | A kind of catalytic ozonation reactor and its sewage water treatment method |
| CN110002576B (en) * | 2019-04-24 | 2023-11-14 | 中冶赛迪工程技术股份有限公司 | Ozone catalytic oxidation reactor and sewage treatment method thereof |
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