CN114573108A - Intelligent modularized sewage treatment device for expressway service area and regulation and control method - Google Patents
Intelligent modularized sewage treatment device for expressway service area and regulation and control method Download PDFInfo
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- 239000010865 sewage Substances 0.000 title claims abstract description 112
- 238000011282 treatment Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000033228 biological regulation Effects 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 134
- 238000005273 aeration Methods 0.000 claims abstract description 77
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 59
- 230000020477 pH reduction Effects 0.000 claims abstract description 54
- 230000007062 hydrolysis Effects 0.000 claims abstract description 50
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 50
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 30
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 21
- 239000011574 phosphorus Substances 0.000 claims abstract description 21
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 11
- 231100000719 pollutant Toxicity 0.000 claims abstract description 11
- 238000004062 sedimentation Methods 0.000 claims abstract description 10
- 230000003301 hydrolyzing effect Effects 0.000 claims abstract description 7
- 230000001737 promoting effect Effects 0.000 claims abstract description 6
- 239000013049 sediment Substances 0.000 claims abstract description 6
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 5
- 244000005700 microbiome Species 0.000 claims abstract description 5
- 239000010452 phosphate Substances 0.000 claims abstract description 5
- CKMXBZGNNVIXHC-UHFFFAOYSA-L ammonium magnesium phosphate hexahydrate Chemical compound [NH4+].O.O.O.O.O.O.[Mg+2].[O-]P([O-])([O-])=O CKMXBZGNNVIXHC-UHFFFAOYSA-L 0.000 claims abstract description 4
- 230000001590 oxidative effect Effects 0.000 claims abstract description 4
- 230000035755 proliferation Effects 0.000 claims abstract description 4
- 229910052567 struvite Inorganic materials 0.000 claims abstract description 4
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 3
- 238000010992 reflux Methods 0.000 claims description 52
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 20
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- 239000000945 filler Substances 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 7
- 239000000395 magnesium oxide Substances 0.000 claims description 7
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 7
- 238000005276 aerator Methods 0.000 claims description 6
- 239000000969 carrier Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 13
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000010802 sludge Substances 0.000 description 6
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- 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 4
- 230000000694 effects Effects 0.000 description 4
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- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
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- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
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- DPTATFGPDCLUTF-UHFFFAOYSA-N phosphanylidyneiron Chemical compound [Fe]#P DPTATFGPDCLUTF-UHFFFAOYSA-N 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/45—Phosphates containing plural metal, or metal and ammonium
- C01B25/451—Phosphates containing plural metal, or metal and ammonium containing metal and ammonium
-
- 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
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/103—Textile-type packing
-
- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1205—Particular type of activated sludge processes
- C02F3/1215—Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates
-
- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/20—Activated sludge processes using diffusers
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
-
- 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
- C02F2101/105—Phosphorus compounds
-
- 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
- C02F2101/38—Organic compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- 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
- C02F2209/003—Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/16—Total nitrogen (tkN-N)
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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 modular intelligent sewage treatment device for a highway service area and a regulation and control method, wherein the device comprises a water inlet pipe; the hydrolysis acidification tank is communicated with the water inlet pipe; the multistage AO pool comprises a plurality of anoxic pools and aerobic pools which are alternately arranged, and adjacent treatment tanks of the anoxic pools and the aerobic pools are communicated with each other; the sedimentation tank is used for receiving the effluent of the multi-stage AO tank, is provided with a water outlet pipe and is used for outputting the sewage after sedimentation; the influent water flow distribution module is used for distributing the sewage in the hydrolytic acidification tank to each anoxic tank; the aeration module is used for switching aerobic and anoxic environments of the multi-stage AO pool; a first biological carrier is arranged in the hydrolysis acidification tank and is used for reacting with phosphate radicals in sewage to form struvite sediment; and a second biological carrier is arranged in the anoxic tank and the aerobic tank and is used for promoting the formation of an aerobic-anoxic-anaerobic zone, removing phosphorus, oxidizing pollutants in water and promoting the proliferation of microorganisms. The method based on the device can strengthen the nitrogen and phosphorus removal capability of the process.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to a modular intelligent sewage treatment device for a highway service area and a regulation and control method.
Background
The expressway service area is an important component of an expressway network, is a place for rest, catering, accommodation, shopping and vehicle maintenance of drivers and passengers, and is mainly provided with facilities such as public toilets, restaurants, shopping convenience stores, gas stations and maintenance places. With the further advance of the national infrastructure construction, the expressway in China develops rapidly, and the influence of the expressway on the environment is concerned while the transportation is ensured and the economic development is promoted. The expressway service area is used as an important component of an expressway network, is increasingly diversified in continuous development, facilitates travel, meets the demand diversity, and meanwhile, the influence of sewage generated by the expressway service area on the ecological environment cannot be ignored. In the aspect of sewage treatment, except that sewage in a few expressway service areas close to towns is discharged into a municipal pipe network, the service areas are all provided with independent sewage treatment facilities. The expressway service area sewage has the problems of large water quantity and water quality change, poor sewage biodegradability, single operation mode and the like, and the conventional technical means generally deals with the impact load of water quality and water quantity by expanding a regulating pond and a sewage treatment unit, so that the investment of sewage treatment facilities is increased, and a carbon source cannot be used for denitrification when small-flow water enters the expressway service area through a large pond, so that the quality of the discharged water is further deteriorated. Meanwhile, the sewage treatment facility has a single process operation mode, cannot adapt to the water quality with a large inlet water amount, and causes the problems of unstable sewage treatment operation and the like. Therefore, the method is of great importance for improving the biodegradability of the sewage in the expressway service area, improving the nitrogen and phosphorus removal capability of the sewage treatment process and realizing intelligent, efficient and stable operation.
Disclosure of Invention
In order to solve at least one of the above technical problems, according to an aspect of the present invention, an intelligent modular sewage treatment apparatus and a control method for a service area of a highway are provided.
The technical solution for realizing the purpose of the invention is as follows:
a modular sewage treatment plant for a service area of a highway, comprising:
the water inlet pipe is used for inputting sewage;
the hydrolysis acidification tank is communicated with the outlet of the water inlet pipe;
the multi-stage AO pool is arranged beside the hydrolytic acidification pool and comprises a plurality of anoxic pools and aerobic pools which are alternately arranged, and the adjacent treatment tanks of the anoxic pools and the aerobic pools are communicated with each other;
the sedimentation tank is used for receiving the effluent of the multi-stage AO tank, is provided with a water outlet pipe and is used for outputting the sewage after sedimentation;
the influent water flow distribution module is used for distributing the sewage in the hydrolytic acidification tank to each anoxic tank;
the aeration module is used for switching aerobic and anoxic environments of the multi-stage AO pool;
a first biological carrier is arranged in the hydrolysis acidification tank and is used for reacting with phosphate radicals in the sewage to form struvite sediment;
and a second biological carrier is arranged in the anoxic tank and the aerobic tank and is used for promoting the formation of an aerobic-anoxic-anaerobic zone, removing phosphorus, oxidizing pollutants in water and promoting microbial proliferation.
In further embodiments, the aeration module comprises an aerator, an aeration disc, and an aeration valve; the aeration machine is communicated with the treatment tanks in the aerobic tanks at all levels through pipelines, aeration discs are arranged in the treatment tanks of the aerobic tanks, the aeration discs are all arranged below the biological carriers II, and aeration valves are arranged on the management of part of the treatment tanks of the aerobic tanks and used for controlling the opening and closing of the aeration discs in the corresponding treatment tanks.
In a further embodiment, the system further comprises a reflux adjusting module, which is used for refluxing the nitrified liquid in the last stage aerobic tank to the hydrolysis acidification tank or the first stage anoxic tank.
In a further embodiment, the backflow conditioning module comprises:
one end of the return pipeline is communicated with the last stage aerobic tank, and the other end of the return pipeline is respectively communicated with the first stage anoxic tank and the hydrolysis acidification tank (2);
the reflux pump is arranged on the reflux pipeline and is used for conveying liquid from one end of the reflux pipeline to the other end of the reflux pipeline;
the first reflux valve is used for controlling the opening and closing of the end part of a reflux pipeline at the hydrolysis acidification tank;
and the second reflux valve is used for controlling the opening and closing of the end part of the reflux pipeline at the first-stage anoxic tank.
In a further embodiment, the first bio-carrier is a basalt fiber filler loaded with magnesium oxide; and the biological carrier II is a basalt fiber filler loaded with zero-valent iron.
In a further embodiment, the first biological carriers are arranged in a plurality of rows in the hydrolysis acidification tank, and the second biological carriers are arranged in a plurality of rows in each of the anoxic tank and the aerobic tank.
According to another aspect of the invention, an intelligent regulation and control method for sewage treatment of a highway service area is provided, a sewage treatment device is designed based on the highway service area in a modularized mode, sewage enters a hydrolysis acidification tank through a water inlet pipe and stays for 6-10 hours, an aeration module works continuously, then the sewage in the hydrolysis acidification tank is distributed to each anoxic tank through a water inlet flow distribution module and stays for 1-3 hours, then the sewage enters an adjacent aerobic tank and stays for 3-5 hours, a sedimentation tank sediments the sewage for 2 hours, and a water outlet pipe discharges the treated sewage.
In a further embodiment, the system is also provided with a monitoring and regulating module, and a corresponding water outlet mode is formulated according to the hydrolysis acidification tank and the water outlet quality condition fed back by the monitoring and regulating module: the method comprises the steps of realizing an ammonia nitrogen standard exceeding operation mode and a total nitrogen standard exceeding operation mode by adjusting an aeration module; and adjusting the flow water inlet running mode with different flow sizes by adjusting the water inlet distribution module and the backflow adjusting module.
In a further embodiment, when the concentration of ammonia nitrogen in the hydrolysis acidification tank exceeds a first set value, an ammonia nitrogen standard exceeding operation mode is started, and all aeration valves are opened;
when the concentration of the total nitrogen in the hydrolysis acidification tank exceeds a second set value, starting a total nitrogen exceeding operation mode, and closing all aeration valves; wherein the second set value is greater than the first set value;
when the flow of the water inlet pipe is higher than the set flow, the large-flow water inlet running mode is started, the reflux pump and the reflux valve II of the reflux adjusting module are started, the reflux valve I is closed, at the moment, part of the reflux pump is closed, and part of the aeration valve is opened;
when the flow of the water inlet pipe is below the set flow, the small-flow water inlet running mode is started, the reflux pump, the reflux valve I and the reflux valve II of the reflux adjusting module are all started, and all the aeration valves are closed at the moment.
In a further embodiment, the multi-stage AO pool is two-stage, and the inflow water flow distribution module supplies water to each stage of anoxic pool with an inflow water ratio of 7: 3.
Compared with the prior art, the invention has the following remarkable advantages:
according to the modular-design sewage treatment device for the expressway service area, the basalt fiber filler loaded with magnesium oxide is added, so that the microbial activity is enhanced, the hydrolysis of refractory substances is promoted, and meanwhile, nitrogen and phosphorus resources in sewage can be recovered; the zero-valent iron loaded basalt fiber filler is added to strengthen the nitrogen and phosphorus removal capability of the process, the sludge concentration is improved, the pollutant removal effect is enhanced, the water quality and water quantity impact resistance of the device is further improved, and meanwhile, the functional microorganisms are ensured to adapt to a new growth environment quickly when the treatment modes are switched, so that multiple nitrogen removal ways are realized; according to the intelligent regulation and control method for the sewage treatment of the expressway service area, a proper process operation mode can be intelligently formulated by monitoring the water quantity and the water quality of inlet and outlet water, and the operation state of the modular treatment tank is adjusted by intelligently adjusting the inlet water distribution module, the backflow module and the aeration module, so that the switching of various process operation modes is realized, the intelligent regulation and control method is suitable for the sewage of the expressway service area with high water quality impact load to the maximum extent, and the stability and the economical efficiency of the sewage treatment of the expressway service area are ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description only relate to some embodiments of the present invention and are not limiting on the present invention.
FIG. 1 shows a modular design of a highway service area sewage treatment plant of the present invention;
FIG. 2 is a schematic diagram showing an ammonia nitrogen exceeding operation mode of a sewage treatment device with a modular design;
FIG. 3 is a schematic diagram showing the mode of operation of the modular design sewage treatment plant in excess of total nitrogen;
FIG. 4 is a schematic view of the modular design sewage treatment plant of the present invention in a high flow influent mode of operation;
FIG. 5 shows a schematic view of the low flow influent mode of operation of a modular design sewage treatment plant of the present invention.
Reference numerals:
1. a water inlet pipe;
2. a hydrolysis acidification pool;
3. a multi-stage AO cell; 30. an anoxic tank; 300. a first-stage anoxic tank; 301. a secondary anoxic tank; 31. an aerobic tank; 310. a primary aerobic tank; 311. a secondary aerobic tank;
4. a sedimentation tank; 40. a water outlet pipe;
5. a water inflow distribution module;
6. an aeration module; 60. an aerator; 61. an aeration valve I; 62. an aeration valve II; 63. an aeration valve III; 64. an aeration valve IV; 65. a first aeration disc; 66. a second aeration disc;
7. a reflux adjustment module; 70. a return line; 71. a reflux pump; 72. a first reflux valve; 73. a second reflux valve;
80. carrying out biological carrier I; 81. and (5) biological carrier II.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "a," "an," "two," and similar referents in the description and claims of this patent application does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another.
Example 1
The existing sewage treatment device for the expressway service area has the problems of low sewage biodegradability, large water quality and water quantity fluctuation, single operation mode and the like, and aiming at the problems, the modularized sewage treatment device for the expressway service area is designed in the embodiment.
As shown in fig. 1, the modular sewage treatment plant for highway service areas of the present embodiment comprises a water inlet pipe 1, a hydrolysis acidification tank 2, a multi-stage AO tank 3, a sedimentation tank 4, a water outlet pipe 40, a water inflow distribution module 5, an aeration module 6, a reflux regulation module 7 and a biological carrier; the water inlet pipe 1 is used for inputting sewage into the sewage treatment device, one end of the water inlet pipe 1 is communicated with the septic tank and the oil separation tank, the other end of the water inlet pipe 1 is communicated with the hydrolysis acidification tank 2, the septic tank is used for treating excrement and filtering and precipitating the excrement, the oil separation tank is used for removing grease substances in the restaurant wastewater, then large suspended or floating pollutants in the sewage are intercepted through the grating to prevent a water pump or a pipeline from being blocked, and then the water is introduced into the water inlet pipe 1;
the hydrolysis acidification tank 2 in the embodiment is a nitrogen and phosphorus recovery type hydrolysis acidification tank; after the sewage and the return sludge from the return adjusting module 6 enter the hydrolysis acidification tank, macromolecular organic matters in the sewage are more effectively degraded into micromolecular organic matters for subsequent denitrification; still be provided with biological carrier 80 in the hydrolytic acidification pond 2, the biological carrier 80 of this embodiment is the basalt fiber of magnesium oxide load, and the phosphate radical in the sewage reacts with magnesium oxide and forms the struvite sediment, and the accessible is peeled off the carrier and is retrieved nitrogen phosphorus resource. The sewage in the last treatment tank of the hydrolysis acidification tank 2 is conveyed to a multi-stage AO tank 3 beside the hydrolysis acidification tank 2 under the distribution of an inlet water flow distribution module 5;
the multi-stage AO pool 3 is an anoxic pool 30 and an aerobic pool 31 which are arranged in turn and alternately, namely the anoxic pool 30-the aerobic pool 31-the anoxic pool 30-the aerobic pool 31 …, the arrangement forms multi-stage, the adjacent anoxic pools 30 and the aerobic pools 31 are communicated with each other, denitrifying bacteria in the anoxic pools 30 utilize carbon sources in the inlet water and nitrate nitrogen and nitrite nitrogen generated by the nitrification of the previous stage aerobic pool 31 to complete denitrification;
the bottom of the hydrolysis acidification pool 2 is provided with a water inlet flow distribution pump which is one of the components of the water inlet flow distribution module 5, the water inlet flow distribution module 5 further comprises a water inlet distribution pipeline and a plurality of water inlet distribution valves, one end of the water inlet distribution pipeline is communicated with the water inlet flow distribution pump, the other end of the water inlet distribution pipeline is arranged above each anoxic pool 30, a water injection passage is formed above each anoxic pool 30, and the water flow of each passage is controlled by each water inlet distribution valve, so that the sewage distribution of the hydrolysis acidification pool 2 to each anoxic pool 30 is realized;
in this embodiment, each of the anoxic tank 30 and the aerobic tank 31 is provided with a second biological carrier 81, the second biological carrier 81 in this embodiment is a basalt fiber filler loaded with zero-valent iron, and a spatial spherical structure formed by the second biological carrier 81 in water is helpful for forming an aerobic-anoxic-anaerobic zone, so that autotrophic nitrifying bacteria, aerobic heterotrophic bacteria, anoxic denitrifying bacteria and anaerobic ammonium oxidizing bacteria can be caused to formAnd the enrichment growth of multiple strains is realized, and various denitrification ways such as synchronous nitrification and denitrification, short-cut nitrification and denitrification, anaerobic ammonia oxidation and the like are realized. The zero-valent iron in the biological carrier II 81 can be adsorbed with the phosphorus in the sewage, microelectrolysis and flocculation reaction are carried out to strengthen phosphorus removal, and the zero-valent iron in the aerobic tank can also form Fe/O2The system generates hydroxyl free radicals, and oxidizes pollutants in water. Meanwhile, iron can directly react with nitrogen pollutants in water and can be used as a necessary trace element for microorganisms to promote the proliferation of the microorganisms.
Further, the present embodiment is further provided with an aeration module 6, and the aeration module 6 includes an aerator 60, an aeration valve one 61, an aeration valve two 62, an aeration valve three 63, an aeration valve four 64, an aeration disc one 65 and an aeration disc two 66. The aerator 60 is communicated with the treatment tanks in the aerobic tanks 31 at all levels through pipelines, wherein an aeration disc 65 is arranged in the first-level aerobic tank 310, an aeration disc 66 is arranged in the second-level aerobic tank 311, the aeration discs are all arranged below the second biological carrier 81, and the first aeration valve 61, the second aeration valve 62, the third aeration valve 63 and the fourth aeration valve 64 can control the opening and closing of the aeration discs in the corresponding treatment tanks. By arranging the aeration valve, part of the aeration disc in the treatment tank can be selectively opened.
Further, the embodiment is further provided with a backflow regulating module 7, the backflow regulating module 7 comprises a backflow pipeline 70, a backflow pump 71, a backflow valve one 72 and a backflow valve two 73, the backflow regulating module 7 can backflow nitrified liquid in the last stage aerobic tank 31 to the hydrolysis acidification tank 2 or the first stage anoxic tank 30, the nitrified liquid flows back to the first stage anoxic tank 30 for denitrification through the backflow regulating module 7 when large-flow inflow water with large sewage yield occurs in one day, and the nitrified liquid flows back to the first stage anoxic tank 30 and the hydrolysis acidification tank 2 through the backflow regulating module 7 when small-flow inflow water with small sewage yield occurs in one day, so that activity enhancement and enhanced biological hydrolysis of backflow sludge are completed, and the stable standard of effluent can be ensured while the impact load of inflow water quantity is reduced.
According to the modular design sewage treatment device for the expressway service area, aiming at the characteristics that the fluctuation of the quality and the quantity of water in the expressway service area is large and the biochemical degree of sewage is low, the hydrolysis effect is enhanced by adding a biological carrier and additionally arranging a nitrogen and phosphorus recovery type hydrolysis acidification tank 2, macromolecular substances in the effluent of a septic tank and the effluent of an oil separation tank are degraded into small molecular substances, the biochemical degree of sewage is further improved, nitrogen and phosphorus resources in the sewage can be recovered by utilizing basalt fiber filler loaded by magnesium oxide, the sludge concentration is improved, and the pollutant removal capacity is improved; a step-feed multi-stage AO pool 3 is adopted, so that a carbon source in the feed water is used for denitrification to the maximum extent; aiming at the problems of high nitrogen and phosphorus content and high nitrogen and phosphorus removal difficulty in a highway service area, basalt fiber fillers loaded with zero-valent iron are added into an anoxic tank 30 and an aerobic tank 31 to strengthen nitrogen and phosphorus removal; the addition of the basalt fiber filler is beneficial to forming aerobic-anoxic-anaerobic conditions, so that various denitrification ways such as synchronous nitrification and denitrification, short-cut nitrification and denitrification, anaerobic ammonia oxidation and the like are realized, a carbon source is saved, and denitrification is enhanced; aiming at the problem of large impact load of sewage quantity in a service area of a highway, the backflow adjusting module 7 is adopted, and the sewage treatment mode of the device can be adjusted in a targeted manner according to the sewage quantity, so that the aim of reducing the water quantity, the water quality and the impact load and outputting stable water reaching the standard is fulfilled.
Example 2
The intelligent regulation and control method for sewage treatment in the expressway service area is based on the modularized design sewage treatment device in the expressway service area in embodiment 1, wherein the multistage AO tank 3 of the sewage treatment device is exemplified by two stages, that is, the multistage AO tank 3 includes a first-stage anoxic tank 300, a first-stage aerobic tank 310, a second-stage anoxic tank 301 and a second-stage aerobic tank 311 which are sequentially arranged, and the second-stage aerobic tank 311 is the last-stage aerobic tank 31.
After sewage in a highway service area enters a septic tank and an oil separation tank, the sewage enters a hydrolysis acidification tank 2 through a water inlet pipe 1, the retention time is 6-10 hours, water in the hydrolysis acidification tank 2 enters a first-stage anoxic tank 300 and a second-stage anoxic tank 301 after being subjected to flow distribution through a water inlet flow distribution module 5, the water inlet ratio is 7:3, and the retention time of 30 water power of each stage of anoxic tank is 1-3 hours; denitrifying bacteria in the first-stage anoxic tank 300 complete denitrification by utilizing a carbon source in the inlet water and nitrate nitrogen and nitrite nitrogen generated by nitrification in the second-stage aerobic tank 311; denitrifying bacteria in the secondary anoxic tank 301 complete denitrification by utilizing a carbon source in the inlet water and nitrate nitrogen and nitrite nitrogen generated by nitrification in the primary aerobic tank 310; the basalt fiber filler loaded with zero-valent iron in the anoxic pond 30 and the phosphate in the water form iron-phosphorus precipitates so as to remove the total phosphorus in the water; the sewage treated by the anoxic tank 30 enters a next-stage aerobic tank 31, nitrifying bacteria in the first-stage aerobic tank 310 and the second-stage aerobic tank 311 oxidize ammonia nitrogen in the water into nitrate nitrogen and nitrite nitrogen, the residence time of each stage of aerobic tank 31 is 3-5 hours, basalt fiber fillers loaded by zero-valent iron in the first-stage aerobic tank 310 and the second-stage aerobic tank 311 enable synchronous nitrification and denitrification, short-cut nitrification and anaerobic ammonia oxidation to be realized in the aerobic tank 31, a nitrified liquid flows back to the first-stage anoxic tank 300 when water flows in at a large flow rate and flows back to the first-stage anoxic tank 300 and the nitrogen-phosphorus recovery type hydrolytic acidification tank 2 when water flows in at a small flow rate, and the treated sewage is discharged through a water outlet pipe 40 after the water flows out of the second-stage aerobic tank 311 are precipitated for 2 hours by a precipitation tank 4;
furthermore, the monitoring and regulating module comprises a flow monitoring device arranged on the water inlet pipe, a water quality monitoring device arranged on the hydrolysis acidification tank, a flow monitoring control device arranged on the flow distribution module, a flow monitoring control device arranged on the return pipe, a control device arranged on the aeration pump and the aeration valve, an effluent water quality monitoring device and an automatic control system, and can automatically control the water inlet flow distribution module 5, the aeration module 6 and the return flow regulation module 7 according to the forward/feedback regulation. The corresponding monitoring device or monitoring control device can adopt a sensor related to flow or water quality monitoring. The operation mode can be divided into an ammonia nitrogen exceeding operation mode and a total nitrogen exceeding operation mode according to the sewage denitrification requirement; the operation of sewage flow needs to be divided into a large flow water inlet operation mode and a small flow water inlet operation mode, the regulation and control strategy of the sewage treatment method of the embodiment is shown in table 1,
TABLE 1 Regulation strategy
In particular to a method for preparing a high-performance nano-silver alloy,
when sewage is treated in the ammonia nitrogen exceeding operation mode, as shown in fig. 2, when the ammonia nitrogen concentration in the hydrolysis acidification tank 2 exceeds 50% of a design value or the ammonia nitrogen concentration in effluent exceeds 5mg/L (8 mg/L in winter), the aeration valve I61, the aeration valve II 62, the aeration valve III 63 and the aeration valve IV 64 are all opened to form an aerobic environment and enhance the treatment of ammonia nitrogen;
when the sewage is treated in the operation mode with the total nitrogen exceeding the standard, as shown in fig. 3, when the total nitrogen concentration in the hydrolysis acidification tank 2 exceeds 50% of the design value or the total nitrogen concentration in the effluent exceeds 15mg/L, the aeration valve I61, the aeration valve II 62, the aeration valve III 63 and the aeration valve IV 64 are all closed, so that an anoxic environment is formed, and the treatment of the total nitrogen is strengthened;
when the large-flow water inlet operation mode is used for treating sewage, for example, when the designed flow is more than 50%, as shown in fig. 4, the reflux pump 71 and the reflux valve two 73 of the reflux regulating module 7 are opened, the reflux valve one 72 is closed, so that the sewage can be treated and drained through the multi-stage AO tank 3 as soon as possible, at this time, the aeration valve one (61) and the aeration valve three (63) are closed, and the aeration valve two (62) and the aeration valve four (64) are opened;
when sewage is treated in the low-flow water inlet operation mode and the flow rate is less than 50%, as shown in fig. 5, the reflux pump 71, the first reflux valve 72 and the second reflux valve 73 of the reflux regulation module 7 are all opened, so that the biodegradability of the reflux sludge and the sewage is enhanced, the denitrification is enhanced, at the moment, the first aeration valve (61), the second aeration valve (62), the third aeration valve (63) and the fourth aeration valve (64) are all closed, and the anoxic state of each tank can maintain a good treatment effect and reduce the aeration energy consumption.
By the intelligent regulation and control method for the sewage treatment in the expressway service area, the sewage treatment strategy of the treatment tank is adjusted in a targeted manner according to the water quality with different characteristic water quantities of sewage, so that the removal of key nitrogen pollutants in sewage treatment is met, and the aim of reducing the impact of the sewage quality is fulfilled; through real time monitoring business turn over water yield, intelligent control water yield operation mode effectively reduces the water yield and strikes, guarantees that sewage treatment is high-efficient stable.
Application example
The sewage treatment device in the embodiment 1 and the sewage treatment method in the embodiment 2 are adopted to treat sewage in a certain expressway service area, and the hydrolysis acidification tank 2 is 60cm long, 50cm wide and 60cm high, the two-stage AO tanks are 160cm long, 50cm wide and 60cm high, the effective water depth is 40cm and is made of organic glass materials in combination with the graph 1. The water inflow rate is designed to be 10L/h, and the hydraulic retention time of the hydrolysis acidification pool 2 is designed to be 6 h. The water inlet flow distribution of the two-stage anoxic tank 30 is 7:3, the hydraulic retention time of the first-stage anoxic tank 300 is 3h, the hydraulic retention time of the first-stage aerobic tank 310 is 4h, the hydraulic retention time of the second-stage anoxic tank 301 is 4h, the hydraulic retention time of the second-stage aerobic tank 311 is 5h, and the reflux ratio of the returned sludge is 100%. The hydrolysis acidification tank 2 is provided with basalt fiber filler loaded by magnesium oxide, the filler is taken out every half year to recover nitrogen and phosphorus resources, and the anoxic tank 30 and the aerobic tank 31 are provided with basalt fiber filler loaded by zero-valent iron.
The large-flow water inlet running mode of the device is set to be 7:00a.m. -19: 00p.m., and the rest time is the small-flow water inlet running mode; when the ammonia nitrogen concentration in the hydrolysis acidification tank 2 exceeds 50% of a design value or the ammonia nitrogen concentration in the effluent exceeds 5mg/L (8 mg/L in winter), starting an ammonia nitrogen standard exceeding operation mode; and when the total nitrogen concentration in the hydrolysis acidification tank exceeds 50% of the design value or the ammonia nitrogen concentration of the effluent exceeds 15mg/L, starting a total nitrogen overproof operation mode.
In the operation process, sewage flows into the system through the water inlet pipe through the peristaltic pump, the system continuously operates for 6 months, the quality of the effluent is monitored every 2 days, and after the sewage is treated, COD, ammonia nitrogen, total phosphorus and the like in the effluent stably reach the first-class A standard of pollutant discharge Standard of urban Sewage treatment plant (GB18918-2002), as shown in Table 2.
TABLE 2 test results
| Test index | COD(mg/L) | Ammonia nitrogen (mg/L) | Total nitrogen (mg/L) | Total phosphorus (mg/L) |
| Inflow water | 424.55 | 81.78 | 92.68 | 14.34 |
| Discharging water | 37.30 | 3.22 | 13.10 | 0.37 |
| Removal rate | 91.21％ | 96.06％ | 85.86％ | 97.42％ |
Comparative example
In the comparative example, only 10cm of spherical polyurethane sponge filler is added into the anoxic tank 30 and the aerobic tank 31, and in other similar application examples, under the condition of the same inlet water quality, the removal rate of COD of the outlet water is 91.11 +/-4.03%, the removal rate of ammonia nitrogen is 88.51 +/-1.50%, the removal rate of total nitrogen is 58.94 +/-10.09%, the removal rate of total phosphorus is-11.08 +/-13.84%, and the total phosphorus does not reach the first-class A standard of pollutant discharge standards of urban sewage treatment plants (GB 18918-2002).
The examples described herein are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a highway service area modularization sewage treatment plant which characterized in that includes:
the water inlet pipe (1) is used for inputting sewage;
a hydrolysis acidification pool (2) communicated with the outlet of the water inlet pipe (1);
the multi-stage AO pool (3) is arranged beside the hydrolysis acidification pool (2), the multi-stage AO pool (3) comprises a plurality of anoxic pools (30) and aerobic pools (31) which are alternately arranged, and adjacent treatment tanks of the anoxic pools (30) and the aerobic pools (31) are communicated with each other;
the sedimentation tank (4) is used for receiving the effluent of the multistage AO pool (3), is provided with a water outlet pipe (40) and is used for outputting the sewage after sedimentation;
the influent water flow distribution module (5) is used for distributing the sewage in the hydrolytic acidification tank (2) to each anoxic tank (30);
the aeration module (6) is used for switching the aerobic and anoxic environments of the multi-stage AO pool (3);
a biological carrier I (80) is arranged in the hydrolysis acidification tank (2) and is used for reacting with phosphate radicals in sewage to form struvite sediment;
and a second biological carrier (81) is arranged in the anoxic tank (30) and the aerobic tank (31) and is used for promoting the formation of an aerobic-anoxic-anaerobic zone, removing phosphorus, oxidizing pollutants in water and promoting the proliferation of microorganisms.
2. The modular highway service area sewage treatment plant according to claim 1, wherein said aeration module (6) comprises an aerator (60), an aeration disc and an aeration valve; the aerator (60) is communicated with the treatment tanks in the aerobic tanks (31) at all levels through pipelines, aeration discs are arranged in the treatment tanks of the aerobic tanks, the aeration discs are all arranged below the biological carrier II (81), and aeration valves are arranged on the management of part of the treatment tanks of the aerobic tanks and used for controlling the opening and closing of the aeration discs in the corresponding treatment tanks.
3. The modular sewage treatment plant of the highway service area according to claim 1 further comprising a reflux adjusting module (7) for refluxing the nitrified liquid in the last stage aerobic tank (31) to the hydrolytic acidification tank (2) or the first stage anoxic tank (30).
4. The modular sewage treatment plant of the service area of a motorway according to claim 3, characterised in that said backflow regulation module (7) comprises:
one end of the return pipeline (70) is communicated with the last stage aerobic tank (31), and the other end is respectively communicated with the first stage anoxic tank (30) and the hydrolysis acidification tank (2);
a reflux pump (71) arranged on the reflux pipeline (70) and used for conveying liquid from one end of the reflux pipeline (70) to the other end;
the first reflux valve (72) is used for controlling the opening and closing of the end part of a reflux pipeline (70) at the hydrolysis acidification tank (2);
and the second reflux valve (73) is used for controlling the opening and closing of the end part of the reflux pipeline (70) at the first-stage anoxic tank (30).
5. The modular highway service area sewage treatment plant according to claim 1 wherein said first bio-carrier (80) is a magnesium oxide loaded basalt fiber fill; and the second biological carrier (81) is a basalt fiber filler loaded with zero-valent iron.
6. The modular freeway services sewage treatment plant according to claim 1, characterised in that said first biological carriers (80) are arranged in a plurality of rows in said hydrolysis acidification tank (2) and said second biological carriers (81) are arranged in a plurality of rows in each of said anoxic tank (30) and aerobic tank (31).
7. An intelligent regulation and control method for sewage treatment in a highway service area is characterized in that a sewage treatment device is designed based on the highway service area in a modularized mode according to any one of claims 1 to 6, sewage enters a hydrolysis acidification tank (2) through a water inlet pipe (1) and stays for 6 to 10 hours, an aeration module (6) works continuously, then the sewage in the hydrolysis acidification tank (2) is distributed into anoxic tanks (30) through a water inlet flow distribution module (5) and stays for 1 to 3 hours, then the sewage enters an adjacent aerobic tank (31) and stays for 3 to 5 hours, a sedimentation tank (4) sediments for 2 hours, and a water outlet pipe (40) discharges the treated sewage.
8. The intelligent regulation and control method for sewage treatment in the expressway service area according to claim 7, wherein a monitoring and regulation and control module is provided, and a corresponding water outlet mode is established according to the hydrolysis acidification tank and the water outlet quality fed back by the monitoring and regulation and control module: the method comprises the steps of realizing an ammonia nitrogen standard exceeding operation mode and a total nitrogen standard exceeding operation mode by adjusting an aeration module (6); and adjusting flow water inlet running modes with different flow sizes by adjusting the water inlet distribution module (5) and the backflow adjusting module (7).
9. The intelligent regulation and control method for sewage treatment in the expressway service area according to claim 7, wherein when the ammonia nitrogen concentration in the hydrolysis acidification tank (2) exceeds a first set value, an ammonia nitrogen overproof operation mode is started, and all aeration valves are started;
when the concentration of the total nitrogen in the hydrolysis acidification tank (2) exceeds a second set value, starting a total nitrogen exceeding operation mode, and closing all aeration valves; wherein the second set value is greater than the first set value;
when the flow of the water inlet pipe (1) is higher than the set flow, a large-flow water inlet running mode is started, a reflux pump (71) and a reflux valve II (73) of a reflux adjusting module (7) are started, a reflux valve I (72) is closed, at the moment, part of the reflux valve is closed, and part of an aeration valve is opened;
when the flow of the water inlet pipe (1) is below the set flow, a small-flow water inlet running mode is started, the reflux pump (71), the reflux valve I (72) and the reflux valve II (73) of the reflux adjusting module (7) are all started, and all the aeration valves are closed at the moment.
10. The intelligent sewage treatment regulation and control method for the expressway service area according to claim 7, wherein the multi-stage AO pool (3) is two-stage, and the inflow distribution module (5) feeds water into each stage of anoxic pool (30) at a water feed ratio of 7: 3.
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