CN115286184A - Sewage treatment and recycling device thereof - Google Patents
Sewage treatment and recycling device thereof Download PDFInfo
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- CN115286184A CN115286184A CN202211035829.6A CN202211035829A CN115286184A CN 115286184 A CN115286184 A CN 115286184A CN 202211035829 A CN202211035829 A CN 202211035829A CN 115286184 A CN115286184 A CN 115286184A
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- 239000010865 sewage Substances 0.000 title claims abstract description 57
- 238000004064 recycling Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 126
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 78
- 238000007034 nitrosation reaction Methods 0.000 claims abstract description 52
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 42
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 39
- 230000003647 oxidation Effects 0.000 claims abstract description 28
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 27
- 230000009935 nitrosation Effects 0.000 claims abstract description 19
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 18
- 239000005416 organic matter Substances 0.000 claims abstract description 16
- 238000002360 preparation method Methods 0.000 claims abstract description 15
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims abstract description 12
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims description 65
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 38
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 claims description 38
- 230000001105 regulatory effect Effects 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 21
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 20
- 229910052902 vermiculite Inorganic materials 0.000 claims description 19
- 235000019354 vermiculite Nutrition 0.000 claims description 19
- 239000010455 vermiculite Substances 0.000 claims description 19
- 239000000126 substance Substances 0.000 claims description 14
- 238000011049 filling Methods 0.000 claims description 7
- 229910002651 NO3 Inorganic materials 0.000 claims description 6
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000004065 wastewater treatment Methods 0.000 claims description 3
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- 239000000203 mixture Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 15
- -1 hydroxyl free radical Chemical class 0.000 abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 3
- 239000001569 carbon dioxide Substances 0.000 abstract description 3
- 150000003254 radicals Chemical class 0.000 abstract 1
- 241000894006 Bacteria Species 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
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- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 230000003578 releasing effect Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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- 238000001179 sorption measurement Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000032770 biofilm formation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000598 endocrine disruptor Substances 0.000 description 1
- 231100000049 endocrine disruptor Toxicity 0.000 description 1
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- 230000002452 interceptive effect Effects 0.000 description 1
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- 239000012528 membrane Substances 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
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- 229910052698 phosphorus Inorganic materials 0.000 description 1
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- 238000010517 secondary reaction Methods 0.000 description 1
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- 238000012546 transfer Methods 0.000 description 1
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/286—Anaerobic digestion processes including two or more steps
-
- 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
Abstract
The invention relates to a sewage treatment and recycling device, which comprises a pretreatment unit, an anaerobic treatment unit, a nitrosation treatment unit, an anaerobic ammonia oxidation treatment unit and a deep treatment unit which are connected in sequence. Wherein the first water outlet and the second water outlet of the anaerobic treatment unit are respectively connected with the nitrosation treatment unit and the anaerobic ammonia oxidation treatment unit. The advanced treatment unit comprises a trace organic matter decomposition reactor and a hydroxyl free radical preparation assembly which are sequentially connected, and the hydroxyl free radical is used for decomposing trace organic matters in the effluent of the anaerobic ammonia oxidation treatment unit. The sewage treatment and recycling device provided by the invention can maintain the ratio of ammonia nitrogen to nitrite + nitrite nitrogen in the inlet water of the anaerobic ammonia oxidation treatment unit to be 1-1.3 through flow regulation, thereby realizing stable nitrogen removal. In addition, the invention can rapidly oxidize the residual trace organic matters in the water body into water and carbon dioxide through the hydroxyl free radicals, so that the quality of the regenerated water is higher and safer.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment and recycling device.
Background
With the acceleration of urbanization process, the rapid development of industry, and the expansion of population, the demand of city for water source is continuously increasing. However, the distribution of water resources in China is not balanced, and many cities have a problem of water shortage to a certain extent, so that the water resources become important restriction factors for the sustainable development of some cities. In order to solve the problem of water resource shortage, the technology of recycling municipal sewage is gradually developed. The sewage discharge amount of cities is huge, the sewage discharge amount to the environment can be reduced by the reclaimed water obtained after treatment, the content and the concentration of the sewage pollutants after treatment are greatly reduced, the pollution capacity is greatly reduced, the reclaimed water can be used as landscape environment water, city miscellaneous water, artificial wetland water, plant area water, water for a water source heat pump system and the like, and the urban water shortage problem can be simultaneously relieved and the urban water environment quality can be improved.
The sewage treatment equipment widely applied in the prior art comprises a filtering grid, an A-AAO biological tank, an MBR biological membrane tank, a disinfection tank and the like which are arranged in sequence, wherein the filtering grid is arranged above the A-AAO biological tank, and the A-AAO biological tank specifically comprises a sludge denitrification tank, an anaerobic tank, an anoxic tank and an aerobic tank which are communicated in sequence. In the sludge denitrification tank, nitrate is reduced into nitrogen gas by denitrifying bacteria. In the aerobic tank, biochemical reactions such as biological oxidation of organic matters, ammoniation of organic nitrogen, nitration of ammonia nitrogen and the like are carried out to remove pollutants such as organic matters, ammonia nitrogen and the like in the wastewater. However, the treatment tanks arranged in the treatment equipment are large in number, large in occupied area and complex in construction process, the denitrification effect is greatly influenced by organic matters, the denitrification efficiency is generally low when the carbon-nitrogen ratio is low, nitrogen elements in effluent are difficult to stably reach the standard, and an organic carbon source needs to be additionally added.
In addition, trace organic substances such as medicines, pesticides, industrial additives, endocrine disruptors and the like generally remain in the reclaimed water obtained after the treatment by the equipment. However, the conventional sewage regeneration process only focuses on ammonia nitrogen, COD and other conventional pollutants, and the attention degree on trace organic matters is insufficient. Although the content of trace organic matters in the regenerated water is far lower than that of conventional pollutants such as nitrogen, phosphorus and the like, the regenerated water has strong toxicity, and therefore, higher environmental risk and hidden health hazards of human bodies are probably brought in the utilization process of the regenerated water.
Therefore, it is necessary to provide a sewage regeneration treatment apparatus which has a simplified equipment structure, has a stable nitrogen removal effect, and reduces the content of trace organic substances in sewage.
Disclosure of Invention
Technical problem to be solved
The invention provides a sewage treatment and recycling device, aiming at solving the problems of large occupied area of sewage treatment equipment, unstable nitrogen removal effect and residual trace organic matters in the prior art.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
a sewage treatment and recycling device comprises a pretreatment unit, an anaerobic treatment unit, a nitrosation treatment unit, an anaerobic ammonia oxidation treatment unit and an advanced treatment unit which are connected in sequence; the pretreatment unit is used for removing suspended matters and impurities in the sewage, and a water inlet of the pretreatment unit is connected with a water outlet of the sewage to be treated;
the anaerobic treatment unit comprises a first water outlet and a second water outlet, the first water outlet is connected with the nitrosation treatment unit, and the second water outlet is connected with the anaerobic ammonia oxidation treatment unit;
the nitrosation processing unit is used for reducing part of nitrate in the sewage into nitrite and oxidizing part of ammonia nitrogen into nitrite nitrogen;
the anaerobic ammonia oxidation treatment unit is used for carrying out anaerobic ammonia oxidation treatment on the mixture of the effluent of the nitrosation treatment unit and the effluent of the anaerobic treatment unit;
the advanced treatment unit comprises a trace organic matter decomposition reactor and a hydroxyl radical preparation assembly; the hydroxyl radical preparation assembly is used for preparing hydroxyl radicals through ozone and hydrogen peroxide, the trace organic matter decomposition reactor is connected with the hydroxyl radical preparation assembly, and the hydroxyl radicals are used for decomposing trace organic matters in the effluent of the anaerobic ammonia oxidation treatment unit.
According to the sewage treatment and recycling device, preferably, the pretreatment unit comprises a water inlet tank, and a water outlet of the water inlet tank is connected with a water inlet of the anaerobic treatment unit;
the sewage treatment device is characterized in that a first grating and a second grating are sequentially arranged in the water inlet pool according to the sewage flowing direction, and the aperture of the first grating is larger than that of the second grating.
According to the sewage treatment and recycling device, preferably, the anaerobic treatment unit comprises an anaerobic tank and a first regulating tank, and the nitrosation treatment unit comprises a nitrosation reaction tank; the anaerobic ammonia oxidation treatment unit comprises an anaerobic ammonia oxidation reaction tank;
the first adjusting tank is arranged between the anaerobic tank and the nitrosation reaction tank and comprises a first water outlet and a second water outlet;
a second regulating tank is arranged between the nitrosation reaction tank and the anaerobic ammonia oxidation reaction tank;
the first water outlet is connected with a water inlet of the nitrosation reaction tank, and the second water outlet is connected with a water inlet of the second regulating tank;
the water outlet of the second regulating tank is connected with the water inlet of the anaerobic ammonia oxidation reaction tank;
the water outlet of the nitrosation reaction tank is connected with the water inlet of the second regulating tank;
and a first stirrer is arranged in the second regulating pool.
According to the sewage treatment and recycling device, preferably, a first flow control assembly, a nitrous substance detector and a first ammonia nitrogen detector are arranged at a water outlet of the nitrosation reaction tank, and the nitrous substance detector is used for detecting total contents of nitrite and nitrite nitrogen;
and a second flow control assembly and a second ammonia nitrogen detector are arranged at a second water outlet of the first regulating tank.
In the sewage treatment and recycling device, it is preferable that the bottom and the inner side wall of the second adjusting tank are provided with heating coils.
In the sewage treatment and recycling device, preferably, vermiculite is filled in the nitrosation reaction tank, and vermiculite is filled in the anaerobic ammoxidation reaction tank;
the particle size of the vermiculite is 2.5mm-3.0mm;
the filling amount of vermiculite in the nitrosation reaction tank is 65-70% of the volume of the nitrosation reaction tank, and the filling amount of vermiculite in the anaerobic ammoxidation reaction tank is 65-70% of the volume of the reaction tank.
According to the sewage treatment and recycling device, preferably, the hydroxyl radical preparation assembly comprises a first reaction structure, a second reaction structure, an ozone generator, a hydrogen peroxide storage and a hydroxyl radical conveying structure;
the ozone generator is connected with the first reaction structure,
the hydrogen peroxide storage is respectively connected with the first reaction structure and the second reaction structure through a first liquid pipeline and a second liquid pipeline;
the first reactive structure is connected to the second reactive structure through a primary hydroxyl radical transport structure;
a pressure within the first reaction structure is greater than a pressure within the second reaction structure;
one end of the hydroxyl radical conveying structure is connected with the second reaction structure, and the other end of the hydroxyl radical conveying structure is arranged in the trace organic matter decomposition reactor.
The sewage treatment and recycling device thereof as described above, preferably, the primary hydroxyl radical transport structure comprises a third liquid pipeline and a releasing member;
the releasing piece comprises a first disc-shaped pipe and a plurality of first vertical pipes which are vertical to and communicated with the first disc-shaped pipe;
a plurality of first through holes are formed in the first disc-shaped pipe and the first vertical pipe;
the third liquid conduit is in communication with the first coil.
According to the sewage treatment and recycling device, preferably, the hydroxyl radical conveying structure comprises a fourth liquid pipeline, a second disc pipe and a plurality of second vertical pipes; the fourth liquid conduit is in communication with the second coiled tube;
the second vertical pipe is perpendicular to and communicated with the first disc-shaped pipe, and a plurality of second through holes are formed in the second disc-shaped pipe and the second vertical pipe.
In the apparatus for wastewater treatment and recycling as described above, preferably, a second stirrer is provided in the micro organic substance decomposition reactor.
(III) advantageous effects
The beneficial effects of the invention are:
firstly, the invention removes organic matters and ammonia nitrogen from the sewage through the anaerobic treatment unit, the nitrosation treatment unit and the anaerobic ammonia oxidation treatment unit, and reduces the number of devices and the occupied area compared with the prior art.
Secondly, the nitrite treatment unit converts part of nitrate and ammonia nitrogen in the sewage into nitrite and nitrite nitrogen, the effluent of the anaerobic treatment unit is used as part of inlet water of the anaerobic ammonia oxidation treatment unit, and the ratio of the ammonia nitrogen and the nitrite nitrogen in the inlet water of the anaerobic ammonia oxidation treatment unit is maintained at 1-1.3 through flow regulation, so that stable nitrogen removal is realized. In addition, compared with the traditional biological denitrification, stable denitrification can be realized by partial nitrosation treatment units and anaerobic ammonia oxidation treatment units without adding extra carbon sources, the aeration energy consumption can be reduced by more than 50%, and the generated sludge can be reduced by more than 90%.
Thirdly, the invention removes trace organic matters from the denitrified sewage through an advanced treatment unit, specifically prepares hydroxyl radicals through ozone and hydrogen peroxide in a hydroxyl radical preparation assembly, and then outputs the hydroxyl radicals to a trace organic matter decomposition reactor. The hydroxyl free radical has strong oxidizing ability, can quickly oxidize trace organic matters remained in the water body into water and carbon dioxide, ensures that the reclaimed water is safer, and reduces potential environmental risks and hidden dangers of human health.
Drawings
FIG. 1 is a schematic view of the overall structure of a sewage treatment and recycling apparatus according to the present invention;
FIG. 2 is a schematic diagram of the structure of a hydroxyl radical generating module according to the present invention;
fig. 3 is a schematic structural view of a release member of the present invention.
[ instruction of reference ]
1: a water inlet pool; 2: an anaerobic tank; 3: a first conditioning tank; 4: a nitrosation reaction tank; 5: a second regulating reservoir; 6: an anaerobic ammonia oxidation reaction tank; 7: a micro organic matter decomposition reactor; 8: a hydroxyl radical preparation component;
9: an ozone generator; 10: a hydrogen peroxide storage; 11: a first reaction structure; 12: a second reaction structure; 13: a first liquid conduit; 14: a second liquid conduit; 15: a third liquid conduit; 16: a first coiled tube; 17: a first vertical tube; 18: a first through hole; 19: a second disc-shaped tube; 20: a second vertical tube; 21: a fourth fluid conduit.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 3, the present embodiment provides a sewage treatment and recycling apparatus, which comprises a pretreatment unit, an anaerobic treatment unit, a nitrosation treatment unit, an anaerobic ammonia oxidation treatment unit, and a deep treatment unit, which are connected in sequence. The pretreatment unit comprises a water inlet tank 1, the anaerobic treatment unit comprises an anaerobic tank 2 and a first regulating tank 3, the nitrosation treatment unit comprises a nitrosation reaction tank 4, and the anaerobic ammonia oxidation treatment unit comprises an anaerobic ammonia oxidation reaction tank 6. In addition, a second regulating tank 5 is arranged between the nitrosation reaction tank 4 and the anaerobic ammonia oxidation reaction tank 6. The advanced treatment unit comprises a micro organic matter decomposition reactor 7 and a hydroxyl radical preparation component 8. The water outlet of the anaerobic ammonia oxidation treatment unit is connected with the water inlet of a third regulating reservoir, the water outlet of the third regulating reservoir is connected with the water inlet of a trace organic matter decomposition reactor 7, and the trace organic matter decomposition reactor 7 is connected with a hydroxyl radical preparation component 8.
The water inlet tank 1 is used for removing suspended matters and impurities in sewage, and a water inlet of the water inlet tank is connected with a water outlet of sewage to be treated. A first grating and a second grating which are used for filtering solid waste and suspended matters are sequentially arranged in the water inlet pool 1 according to the flowing direction of sewage, the first grating and the second grating are fully automatically controlled, and the aperture of the first grating is larger than that of the second grating. Preferably, the first grid has an aperture of 5mm and the second grid has an aperture of 3mm. The water inlet tank 1 can automatically catch large suspended matters and impurities in sewage so as to facilitate the treatment of the subsequent process.
The anaerobic tank 2 is used for degrading and removing organic matters in the sewage and reducing the COD of the effluent. The first adjusting tank 3 is arranged between the anaerobic tank 2 and the nitrosation reaction tank 4, and specifically, the first adjusting tank 3 comprises a first water outlet and a second water outlet. The first water outlet is connected with the water inlet of the nitrosation reaction tank 4, and the second water outlet is connected with the water inlet of the second regulating tank 5. The water outlet of the second regulating tank 5 is connected with the water inlet of the anaerobic ammonia oxidation reaction tank 6, and the water outlet of the nitrosation reaction tank 4 is connected with the water inlet of the second regulating tank 5.
The nitrosation reaction tank 4 is used for carrying out partial nitrosation treatment on the sewage after the organic matter is degraded, so that part of nitrate in the sewage is converted into nitrite, and part of ammonia nitrogen is converted into nitrite nitrogen. And the water body after the partial nitrosation treatment enters a second regulating reservoir 5. In order to maintain the ratio of ammonia nitrogen to nitrite + nitrite nitrogen in the influent water of the anammox treatment unit to be 1-1.3 and ensure the stable proceeding of the subsequent anammox, the effluent water of the anammox treatment unit is simultaneously conveyed to the second regulating tank 5 to be used as part of the influent water of the anammox reaction tank 6, and then the ratio of ammonia nitrogen to nitrite + nitrite nitrogen in the water body in the second regulating tank 5 is maintained to be 1-1.3 by regulating the effluent water flow of the anammox reaction tank 6 and the effluent water flow of the nitrosation reaction tank 4, thereby ensuring the stable nitrogen removal of the whole device. Further, a first stirrer is arranged in the second regulating tank 5 and used for uniformly stirring the sewage containing the nitrate, the nitrate nitrogen and the ammonia nitrogen.
Specifically, in order to maintain the ratio of ammonia nitrogen to nitrite + nitrite nitrogen in the water body in the second regulating reservoir 5 at 1-1.3, a first flow control assembly, a nitrous acid substance detector and a first ammonia nitrogen detector are arranged at the water outlet of the nitrosation reaction tank 4 in this embodiment. First flow control assembly is used for adjusting the play water flow of nitrosation reaction pond 4, and nitrous acid material detector is used for detecting the total content of nitrite and nitrite nitrogen, and first ammonia nitrogen detector is used for detecting the ammonia nitrogen content in the play water of nitrosation reaction pond 4. And a second flow control assembly and a second ammonia nitrogen detector are arranged at a second water outlet of the first regulating tank 3. The second flow control assembly is used for adjusting the water outlet flow at a second water outlet of the first adjusting tank 3, and the second ammonia nitrogen detector is used for detecting the ammonia nitrogen content of the water at the second water outlet of the first adjusting tank 3.
Compare traditional biological denitrogenation, the partial nitrosation reaction tank of this embodiment and anaerobic ammonium oxidation reaction tank 6 need not additionally to add the carbon source can realize stable denitrogenation, can reduce the aeration energy consumption more than 50% to the mud that produces also can reduce more than 90%.
The anaerobic ammonia oxidation reaction tank 6 is used for carrying out anaerobic ammonia oxidation denitrification treatment on the effluent of the second regulating tank 5. Vermiculite is filled in the nitrosation reaction tank 4 and used for the attached growth of nitrosation bacteria, and vermiculite is filled in the anaerobic ammonia oxidation reaction tank and used for the attached growth of anaerobic ammonia oxidation bacteria. Preferably, the particle size of the vermiculite is 2.5mm-3.0mm. Vermiculite with the grain size of 2.5mm-3.0mm has larger specific surface area and rich pore structure, and is beneficial to biofilm formation of nitrosobacteria and anaerobic ammonium oxidation bacteria and adsorption of ammonia nitrogen. In addition, the vermiculite in the particle size range can not cause pipeline blockage, and can be safely used. Furthermore, the filling amount of vermiculite in the nitrosation reaction tank 4 is 65-70% of the volume of the nitrosation reaction tank 4, and the filling amount of vermiculite in the anaerobic ammoxidation reaction tank is 65-70% of the volume of the reaction tank. The filling amount is favorable for realizing the balance between the adsorption of ammonia nitrogen by vermiculite and the biological analysis of ammonia nitrogen, and is favorable for the biological regeneration of vermiculite and the long-term stable operation of a system.
The metabolic activity of anammox bacteria is greatly influenced by temperature. Generally, 35 ℃ is the temperature at which the anammox bacteria metabolize most rapidly and the propagation cycle is shortest. However, most municipal wastewater has a low water temperature, about 10-25 ℃, which is likely to affect the performance of anammox bacteria. In order to avoid the anammox bacteria to be influenced by the low-temperature sewage, the heating coils are arranged at the bottom and the inner side wall of the second regulating tank 5 in the embodiment, so that the heating area of the water body is increased as much as possible.
The hydroxyl radical preparation assembly 8 is used for preparing hydroxyl radicals through ozone and hydrogen peroxide, and the hydroxyl radicals are used for decomposing trace organic matters in the effluent water of the anaerobic ammonia oxidation treatment unit. The hydroxyl free radical has strong oxidizing property, can perform rapid chain reaction with most organic pollutants, can oxidize harmful substances into carbon dioxide and water without selectivity, generates water and oxygen by self reaction, does not generate other substances, and does not generate secondary pollution.
Specifically, as shown in fig. 2, the hydroxyl radical preparation assembly 8 includes a first reaction structure 11, a second reaction structure 12, an ozone generator 9, a hydrogen peroxide storage 10, and a hydroxyl radical delivery structure. Wherein the ozone generator 9 is connected to the first reaction structure 11 for providing ozone to the first reaction structure 11. The hydrogen peroxide storage 10 is connected to the first reaction structure 11 and the second reaction structure 12 through a first liquid pipe 13 and a second liquid pipe 14, respectively, and can supply hydrogen peroxide to the first reaction structure 11 and the second reaction structure 12, respectively. Further, the first reactive structure 11 is connected to the second reactive structure 12 through a primary hydroxyl radical transport structure. The pressure in the first reaction structure 11 is greater than the pressure in the second reaction structure 12.
In the first reaction structure 11, a reaction occurs:
O 3 +4H 2 O 2 →2HO·+3O 2 +3H 2 O
in the above reaction, ozone is dissolved in hydrogen peroxide to react, and ozone is continuously consumed to generate hydroxyl radical OH. In this embodiment, the pressure in the first reaction structure 11 is relatively high, and may be 0.25 to 0.3Mpa, so as to provide a suitable pressure environment for the primary reaction of ozone and hydrogen peroxide, so as to promote the forward direction of the primary reaction, so that the primary reaction is relatively sufficient, and the ozone is continuously dissolved in the hydrogen peroxide, thereby generating more hydroxyl radicals. For the sake of limitation, a considerable portion of the ozone in the first reaction structure 11 remains unreacted and remains after the completion of the first reaction.
The first reaction structure 11 is connected with the second reaction structure 12 through a primary hydroxyl radical conveying structure, and can convey a hydroxyl radical-ozone-water body system after the reaction is finished into the second reaction structure 12. Preferably, the second reaction structure 12 is at atmospheric pressure and is directly connected to the atmosphere. When the first reaction structure 11 conveys the hydroxyl radical-ozone-water system to the second reaction structure 12 through the primary hydroxyl radical conveying structure, simultaneously, the hydrogen peroxide storage 10 conveys the hydrogen peroxide to the second reaction structure 12,
at the moment of releasing the unreacted ozone in the first reaction structure 11, the gas pressure is suddenly reduced after the ozone is conveyed to the second reaction structure 12, so that a gas-water mixed solution is formed in the second reaction structure 12, and then the gas-water mixed solution is further fully mixed and contacted with hydrogen peroxide to react to generate more hydroxyl radicals. The reaction equation of the secondary reaction is as follows:
O 3 +4H 2 O 2 →2HO·+3O 2 +3H 2 O
therefore, the second reaction structure 12 can further promote the reaction between ozone and hydrogen peroxide, efficiently produce a hydroxyl radical solution, and then transfer the hydroxyl radical solution to the trace organic substance decomposition reactor 7 to oxidize the trace organic substance.
Specifically, one end of the hydroxyl radical transport structure is connected to the second reaction structure 12, and the other end is disposed in the trace organic substance decomposition reactor 7.
The primary hydroxyl radical transport structure includes a third liquid conduit 15 and a release member. As shown in fig. 3, the release member includes a first coil tube 16 and a plurality of first vertical tubes 17 perpendicular to and in communication with the first coil tube 16. A third liquid conduit 15 communicates with the first coil.
The first disc-shaped pipe 16 and the first vertical pipe 17 are provided with a plurality of first through holes 18, so that the first reaction structure 11 has a better releasing effect when conveying the hydroxyl radical-ozone-water system to the second reaction structure 12.
The hydroxyl radical conveying structure comprises a fourth liquid pipeline 21, a second disc-shaped pipe 19 and a plurality of second vertical pipes 20, wherein the fourth liquid pipeline 21 is communicated with the second coil pipe.
The second vertical pipe 20 is perpendicular to and communicated with the first disc-shaped pipe 16, and a plurality of second through holes are formed in the second disc-shaped pipe 19 and the second vertical pipe 20, so that the prepared hydroxyl radical solution can be more uniformly conveyed into the micro organic matter decomposition reactor 7 in a shorter time, the contact area with a water body is larger, and the removal effect of the micro organic matter is faster and better. The second disk tube 19, the second vertical tube 20, and the second through hole have the same structure as the first disk tube 16, the first vertical tube 17, and the first through hole 18, and thus are not shown separately in the drawings.
Furthermore, a second stirrer is arranged in the trace organic matter decomposition reactor 7, so that the contact between the hydroxyl radicals and the trace organic matters in the water body is more, and the oxidative decomposition of the trace organic matters can be quickly completed when the effect of the hydroxyl radicals is stronger.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
The above embodiments are only for explaining the present invention, and do not limit the protection scope of the present invention, and those skilled in the art can make various changes or modifications within the scope of the claims and fall within the spirit of the present invention.
Claims (10)
1. A sewage treatment and recycling device is characterized by comprising a pretreatment unit, an anaerobic treatment unit, a nitrosation treatment unit, an anaerobic ammonia oxidation treatment unit and an advanced treatment unit which are connected in sequence; the pretreatment unit is used for removing suspended matters and impurities in sewage, and a water inlet of the pretreatment unit is connected with a water outlet of sewage to be treated;
the anaerobic treatment unit comprises a first water outlet and a second water outlet, the first water outlet is connected with the nitrosation treatment unit, and the second water outlet is connected with the anaerobic ammonia oxidation treatment unit;
the nitrosation processing unit is used for reducing part of nitrate in the sewage into nitrite and oxidizing part of ammonia nitrogen into nitrite nitrogen;
the anaerobic ammonia oxidation treatment unit is used for carrying out anaerobic ammonia oxidation treatment on the mixture of the effluent of the nitrosation treatment unit and the effluent of the anaerobic treatment unit;
the advanced treatment unit comprises a micro organic matter decomposition reactor (7) and a hydroxyl radical preparation assembly (8); the hydroxyl radical preparation component (8) is used for preparing hydroxyl radicals through ozone and hydrogen peroxide, the trace organic matter decomposition reactor (7) is connected with the hydroxyl radical preparation component (8), and the hydroxyl radicals are used for decomposing trace organic matters in effluent of the anaerobic ammonia oxidation treatment unit.
2. The sewage treatment and recycling device according to claim 1, wherein said pretreatment unit comprises a water inlet tank (1), the water outlet of said water inlet tank (1) is connected with the water inlet of said anaerobic treatment unit;
the sewage treatment device is characterized in that a first grating and a second grating are sequentially arranged in the water inlet pool (1) according to the sewage flowing direction, and the aperture of the first grating is larger than that of the second grating.
3. The sewage treatment and recycling apparatus according to claim 1, wherein said anaerobic treatment unit comprises an anaerobic tank (2) and a first adjusting tank (3), said nitrosation treatment unit comprises a nitrosation reaction tank (4); the anaerobic ammonia oxidation treatment unit comprises an anaerobic ammonia oxidation reaction tank (6);
the first adjusting tank (3) is arranged between the anaerobic tank (2) and the nitrosation reaction tank (4), and the first adjusting tank (3) comprises a first water outlet and a second water outlet;
a second regulating tank (5) is arranged between the nitrosation reaction tank (4) and the anaerobic ammonia oxidation reaction tank (6);
the first water outlet is connected with a water inlet of the nitrosation reaction tank (4), and the second water outlet is connected with a water inlet of the second regulating tank (5);
the water outlet of the second regulating tank (5) is connected with the water inlet of the anaerobic ammonia oxidation reaction tank (6);
the water outlet of the nitrosation reaction tank (4) is connected with the water inlet of the second regulating tank (5);
and a first stirrer is arranged in the second adjusting tank (5).
4. The sewage treatment and recycling device according to claim 3, wherein a first flow control assembly, a nitrous substance detector and a first ammonia nitrogen detector are arranged at the water outlet of the nitrosation reaction tank (4), and the nitrous substance detector is used for detecting nitrite and the total content of nitrite nitrogen;
and a second flow control assembly and a second ammonia nitrogen detector are arranged at a second water outlet of the first regulating tank (3).
5. Sewage treatment and recycling unit according to claim 3, characterised in that the bottom and the inner side walls of said second conditioning tank (5) are provided with heating coils.
6. The sewage treatment and recycling device according to claim 3, wherein the nitrosation reaction tank (4) is filled with vermiculite, and the anaerobic ammoxidation reaction tank (6) is filled with vermiculite;
the particle size of the vermiculite is 2.5mm-3.0mm;
the filling amount of the vermiculite in the nitrosation reaction tank (4) is 65-70% of the volume of the nitrosation reaction tank (4), and the filling amount of the vermiculite in the anaerobic ammonia oxidation reaction tank (6) is 65-70% of the volume of the reaction tank.
7. The sewage treatment and recycling device according to claim 1, wherein said hydroxyl radical preparation component (8) comprises a first reaction structure (11), a second reaction structure (12), an ozone generator (9), a hydrogen peroxide storage (10) and a hydroxyl radical delivery structure;
the ozone generator (9) is connected with the first reaction structure (11),
the hydrogen peroxide storage (10) is respectively connected with the first reaction structure (11) and the second reaction structure (12) through a first liquid pipeline (13) and a second liquid pipeline (14);
said first reactive structure (11) is connected to said second reactive structure (12) through a primary hydroxyl radical transport structure;
the pressure inside the first reaction structure (11) is greater than the pressure inside the second reaction structure (12);
one end of the hydroxyl radical conveying structure is connected with the second reaction structure (12), and the other end of the hydroxyl radical conveying structure is arranged in the trace organic matter decomposition reactor (7).
8. The wastewater treatment and recycling device according to claim 7, wherein said primary hydroxyl radical transport structure comprises a third liquid conduit (15) and a release member;
the release member comprises a first disc-shaped tube (16) and a plurality of first vertical tubes (17) which are perpendicular to and communicated with the first disc-shaped tube (16);
a plurality of first through holes (18) are formed in the first disc-shaped pipe (16) and the first vertical pipe (17);
the third liquid conduit (15) is in communication with the first coil.
9. Sewage treatment and recycling unit according to claim 8, characterised in that said hydroxyl radical transport structure comprises a fourth liquid pipe (21), a second disc-shaped pipe (19) and several second vertical pipes (20); said fourth liquid conduit (21) being in communication with said second coil;
the second vertical pipe (20) is perpendicular to and communicated with the first disc-shaped pipe (16), and a plurality of second through holes are formed in the second disc-shaped pipe (19) and the second vertical pipe (20).
10. The wastewater treatment and recycling apparatus according to claim 8, wherein a second agitator is provided in the micro organic substance decomposition reactor (7).
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| CN105776775A (en) * | 2016-05-12 | 2016-07-20 | 武汉理工大学 | Anaerobic-autotrophic nitrogen removal-ozone oxidation coupling landfill leachate whole flow process zero emission processing process |
| US20200325051A1 (en) * | 2017-05-29 | 2020-10-15 | Foundation For Research And Business, Seoul National University Of Science And Technology | Wastewater treatment system using anaerobic ammonium oxidation in mainstream |
| CN112960760A (en) * | 2021-02-10 | 2021-06-15 | 北京启元汇通水务科技股份有限公司 | Preparation device and preparation method of hydroxyl radical and hydroxyl radical solution |
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| CN105776775A (en) * | 2016-05-12 | 2016-07-20 | 武汉理工大学 | Anaerobic-autotrophic nitrogen removal-ozone oxidation coupling landfill leachate whole flow process zero emission processing process |
| US20200325051A1 (en) * | 2017-05-29 | 2020-10-15 | Foundation For Research And Business, Seoul National University Of Science And Technology | Wastewater treatment system using anaerobic ammonium oxidation in mainstream |
| CN112960760A (en) * | 2021-02-10 | 2021-06-15 | 北京启元汇通水务科技股份有限公司 | Preparation device and preparation method of hydroxyl radical and hydroxyl radical solution |
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