CN112159041A - Energy-concerving and environment-protective hydrologic cycle effluent treatment plant - Google Patents
Energy-concerving and environment-protective hydrologic cycle effluent treatment plant Download PDFInfo
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- CN112159041A CN112159041A CN202011070995.0A CN202011070995A CN112159041A CN 112159041 A CN112159041 A CN 112159041A CN 202011070995 A CN202011070995 A CN 202011070995A CN 112159041 A CN112159041 A CN 112159041A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 120
- 239000002245 particle Substances 0.000 claims abstract description 99
- 239000002351 wastewater Substances 0.000 claims abstract description 76
- 238000004062 sedimentation Methods 0.000 claims abstract description 61
- 241000894006 Bacteria Species 0.000 claims abstract description 40
- 238000006243 chemical reaction Methods 0.000 claims abstract description 39
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000010865 sewage Substances 0.000 claims abstract description 24
- 244000005700 microbiome Species 0.000 claims abstract description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 13
- 239000012528 membrane Substances 0.000 claims description 57
- 239000000126 substance Substances 0.000 claims description 40
- 238000003756 stirring Methods 0.000 claims description 21
- 239000010802 sludge Substances 0.000 claims description 18
- 230000001546 nitrifying effect Effects 0.000 claims description 14
- 238000005086 pumping Methods 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 12
- 239000000017 hydrogel Substances 0.000 claims description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 9
- 239000008187 granular material Substances 0.000 claims description 7
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 6
- 238000001471 micro-filtration Methods 0.000 claims description 6
- 238000000108 ultra-filtration Methods 0.000 claims description 6
- 239000012510 hollow fiber Substances 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004642 Polyimide Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 235000010980 cellulose Nutrition 0.000 claims description 3
- 238000012851 eutrophication Methods 0.000 claims description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 3
- 229920002492 poly(sulfone) Polymers 0.000 claims description 3
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 229920000193 polymethacrylate Polymers 0.000 claims description 3
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 238000009941 weaving Methods 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 abstract description 12
- 231100000719 pollutant Toxicity 0.000 abstract description 12
- 241000108664 Nitrobacteria Species 0.000 abstract description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 4
- 208000034699 Vitreous floaters Diseases 0.000 abstract description 4
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 4
- 239000011574 phosphorus Substances 0.000 abstract description 4
- 239000007787 solid Substances 0.000 abstract description 4
- 238000009423 ventilation Methods 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000009372 pisciculture Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
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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
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- 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
-
- 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
- C02F3/302—Nitrification and denitrification treatment
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses an energy-saving and environment-friendly water circulation wastewater treatment device, which adopts a three-level wastewater treatment mode, wherein the first-level treatment is that sewage is precipitated through a first sedimentation tank, and a first grid is arranged in the first sedimentation tank, so that larger floaters or solid pollutants in wastewater are effectively removed; the secondary treatment is that the first carrier particles, the second carrier particles and the third carrier particles are added into the nitrification tank and the denitrification tank, and the first carrier particles, the second carrier particles and the third carrier particles are filled with microorganisms, nitrobacteria or denitrifying bacteria, so that organic pollutants in the wastewater can be greatly removed; the third-stage treatment is to make the waste water pass through a biomembrane reaction tank to further remove pollutants which cannot be removed by the second-stage treatment, wherein the pollutants comprise organic matters, phosphorus, nitrogen and soluble inorganic matters which cannot be degraded by microorganisms.
Description
Technical Field
The invention relates to a wastewater treatment device, in particular to an energy-saving and environment-friendly water circulation wastewater treatment device, and belongs to the technical field of water circulation wastewater treatment.
Background
Waste water in farm and rural areas, waste water used in households, urban sewage, fish farming waste water, and various industrial waste water, and the sewage treatment is performed by the activated sludge method, and aerobic microorganisms and anaerobic microorganisms are used for treatment. In the case of the conventional activated sludge process, the retention time of wastewater in an aeration tank is designed to be 6 to 8 hours, however, recently, the amount of wastewater tends to increase with the development of industry and change of life, and thus when a large amount of wastewater is treated according to the activated sludge process using the conventional wastewater treatment tank, abnormal phenomena such as sludge bulking are generated due to the shortened retention time of wastewater, and thus the wastewater cannot be satisfactorily treated.
But has the following disadvantages: 1. the processing time is too long; 2. since the membrane module is in the treatment tank, the precipitated sludge treated with the polymeric carriers is easily attached to the membrane surface and the portion between the hollow fiber membrane modules, and thus the flow load of the wastewater cannot be set to a high value in order to prevent clogging of the membrane pores, and therefore the compactness of the apparatus is limited; 3. the carriers are easily broken and broken due to the geometrical effect of the attachment of the precipitated sludge to the membrane surface, the air vibration caused by aeration, and the collision of carrier particles.
In order to solve the problems, an energy-saving and environment-friendly water circulation wastewater treatment device is provided.
Disclosure of Invention
The invention aims to provide an energy-saving and environment-friendly water circulation wastewater treatment device, which adopts a three-level wastewater treatment mode, wherein the first-level treatment is to carry out sewage precipitation through a first sedimentation tank, and a first grid is arranged in the first sedimentation tank, so that larger floaters or solid pollutants in wastewater are effectively removed; the secondary treatment is that the first carrier particles, the second carrier particles and the third carrier particles are added into the nitrification tank and the denitrification tank, and the first carrier particles, the second carrier particles and the third carrier particles are filled with microorganisms, nitrobacteria or denitrifying bacteria, so that organic pollutants in the wastewater can be greatly removed; the third-stage treatment is to make the waste water pass through a biomembrane reaction tank to further remove pollutants which cannot be removed by the second-stage treatment, wherein the pollutants comprise organic matters, phosphorus, nitrogen and soluble inorganic matters which cannot be degraded by microorganisms.
The purpose of the invention can be realized by the following technical scheme: an energy-saving and environment-friendly water circulation wastewater treatment device comprises a water flow pipeline, a water return pipeline, first carrier particles, a buffer plate, second carrier particles, third carrier particles, a second grid, a biological membrane reaction tank, a biological membrane, a water suction pump, an air diffuser, a blower, a rotary motor, rotary blades, a first grid, a first sedimentation tank, a denitrification tank, a nitrification tank and an anaerobic filter;
the first sedimentation tank is used for storing wastewater containing organic substances or inorganic substances, a first grid is arranged in the first sedimentation tank, the first sedimentation tank is divided into a wastewater area and a filtering area by the first grid, a water flow pipeline is arranged in the filtering area of the first sedimentation tank, and the water flow pipeline is used for pumping the wastewater primarily filtered by the first grid to the sewage treatment tank;
the sewage treatment pool comprises a denitrification pool and a nitrification pool, wherein the denitrification pool is internally provided with a stirring device, the stirring device comprises a waterproof sleeve, a rotating motor and rotating blades, the rotating motor is arranged in the waterproof sleeve, an output shaft of the rotating motor passes through the waterproof sleeve, the surface of the output shaft is provided with the rotating blades, the stirring device is used for stirring the waste water in the denitrification pool, first carrier particles are placed in the denitrification pool, a buffer board is arranged in the denitrification pool, the denitrification pool is connected with the nitrification pool, an air blower is arranged outside the nitrification pool, an air diffuser is arranged in the nitrification pool, the air blower is connected with the air diffuser through an air pipeline, second carrier particles and third carrier particles are placed in the nitrification pool, a second grid is arranged in the nitrification pool, and a water flow pipeline is arranged in the nitrification pool, the water flow pipeline is used for pumping the wastewater in the nitrification tank to the biological membrane reaction tank;
a biological membrane is arranged in the biological membrane reaction tank, a water flow pipeline is arranged between the nitrification tank and the biological membrane reaction tank, a water suction pump is arranged on the surface of the water flow pipeline, a water return pipeline is arranged between the nitrification tank and the biological membrane reaction tank, and water return pipelines are arranged between the nitrification tank and the denitrification tank as well as between the nitrification tank and the first sedimentation tank;
the water circulation wastewater treatment device also comprises an anaerobic filter, wherein the anaerobic filter is a filter tank with filler media and is used for receiving wastewater returned by the nitrification tank.
The first carrier particles are filled with denitrifying bacteria, the second carrier particles are filled with nitrifying bacteria, the nitrifying bacteria decompose and remove organic matters and inorganic matters contained in the wastewater, the denitrifying bacteria convert nitrite into nitrogen through denitrification to be discharged out of a water body, the concentration of the nitrite is reduced, the denitrifying bacteria convert nitrogen-containing compounds in the water body into nitrogen, the nitrogen concentration in the water body is reduced, the eutrophication of the water body is prevented, and the third carrier particles are filled with microorganisms.
Wherein the first sedimentation tank is arranged in front of the sewage treatment tank, the nitrified treated water flowing out of the sewage treatment tank flows to the biomembrane reaction tank through the water flow pipeline, one part of the treated water flows back and circulates to the denitrification tank or the first sedimentation tank, and the treated water which does not pass through the biomembrane reaction tank flows back and circulates to the nitrification tank.
Wherein, the first carrier particle of fixed microorganism, nitrobacteria or denitrifying bacteria, second carrier particle and third carrier particle are acetalized polyvinyl alcohol hydrogel, the acetalized polyvinyl alcohol hydrogel has a latticed surface layer woven by fibrous object with diameter of 0.1-50um, the acetalized polyvinyl alcohol hydrogel has 10 grooves on the surface of hydrogel with length of every 1mm, the diameter of the groove is 10-100pm, and the depth is 10-100 um.
Wherein the biofilm is a microfiltration range membrane or an ultrafiltration range membrane, and the microfiltration range membrane or the ultrafiltration range membrane is a hydrophilic membrane or a membrane made of hydrophilic substances.
The biological membrane is made of one or more of polysulfone polyacrylonitrile, polyolefins, celluloses, polyamides, polyesters, PWA, polymethacrylates and polyimide, has a hollow fiber structure and has the inner diameter of 1000 mu m.
The method comprises the following specific treatment steps:
the method comprises the following steps: introducing wastewater containing organic substances or inorganic substances into a first sedimentation tank, wherein a first grid is arranged in the first sedimentation tank and is used for preliminarily precipitating and filtering suspended substances contained in the wastewater;
step two: pumping the wastewater filtered by the first grating in the first sedimentation tank to a sewage treatment tank through a water flow pipeline, adding first carrier particles for fixing denitrifying bacteria into a denitrification tank, and treating the wastewater under an anaerobic condition; a buffer plate is arranged in the denitrification tank, and the front bottom of the buffer plate is bent to prevent carrier particles and sludge from flowing out;
step three: a stirring device is arranged at the bottom of the denitrification tank and is used for fluidizing the first carrier particles for fixing the denitrifying bacteria;
step four: the wastewater after denitrification flows into a nitrification tank, an air blower is arranged outside the nitrification tank, the air blower conveys air to an air diffuser inside the nitrification tank through a ventilation pipeline, second carrier particles for fixing nitrifying bacteria and third carrier particles for fixing microorganisms are fluidized, and organic substances or inorganic substances are treated under aerobic conditions; a second grid is arranged inside the nitrification tank to prevent carrier particles and sludge from flowing out;
step five: nitrified water flowing out of the nitrification tank is introduced into the biological membrane reaction tank by a water suction pump, and non-permeated water which does not pass through the biological membrane flows back from a water return pipeline and circulates to the denitrification tank or the nitrification tank or the first sedimentation tank;
step six: the clear water flowing out of the biomembrane reaction tank is used as the treated water.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts a three-stage wastewater treatment mode, wherein the first-stage treatment is to carry out sewage precipitation through the first sedimentation tank, and a first grid is arranged in the first sedimentation tank, so that larger floaters or solid pollutants in the wastewater are effectively removed; the secondary treatment is that the first carrier particles, the second carrier particles and the third carrier particles are added into the nitrification tank and the denitrification tank, and the first carrier particles, the second carrier particles and the third carrier particles are filled with microorganisms, nitrobacteria or denitrifying bacteria, so that organic pollutants in the wastewater can be greatly removed; the third-stage treatment is to make the waste water pass through a biomembrane reaction tank to further remove pollutants which cannot be removed by the second-stage treatment, wherein the pollutants comprise organic matters, phosphorus, nitrogen and soluble inorganic matters which cannot be degraded by microorganisms.
2. The sewage treatment tank comprises a denitrification tank and a nitrification tank, a stirring device is arranged in the denitrification tank, the stirring device comprises a waterproof sleeve, a rotating motor and a rotating blade, the rotating motor is arranged in the waterproof sleeve, an output shaft of the motor penetrates through the waterproof sleeve, and output shaft surface mounting has rotating vane, agitating unit is used for stirring the inside waste water in denitrification pond, first carrier granule has been placed to denitrification pond inside, be provided with the buffer board in the denitrification pond, denitrification pond is connected with the nitrification tank, nitrify the pond outside and install the air-blower, nitrify the pond internally mounted and have air diffuser, the air-blower passes through air pipe with air diffuser and links to each other, nitrify inside second carrier granule and the third carrier granule of having placed of pond, nitrify pond internally mounted and have the second grid, nitrify the pond internally mounted and have the rivers pipeline, the rivers pipeline is used for taking out the inside waste water in nitrifying the pond to biomembrane reaction tank.
3. Introducing wastewater containing organic substances or inorganic substances into a first sedimentation tank, wherein a first grid is arranged in the first sedimentation tank and is used for preliminarily precipitating and filtering suspended substances contained in the wastewater; pumping the wastewater filtered by the first grating in the first sedimentation tank to a sewage treatment tank through a water flow pipeline, adding first carrier particles for fixing denitrifying bacteria into a denitrification tank, and treating the wastewater under an anaerobic condition; a buffer plate is arranged in the denitrification tank, and the front bottom of the buffer plate is bent to prevent carrier particles and sludge from flowing out; the bottom of the denitrification tank is provided with a stirring device, and the stirring device fluidizes the first carrier particles for fixing denitrifying bacteria.
4. The wastewater after denitrification flows into a nitrification tank, an air blower is arranged outside the nitrification tank, the air blower conveys air to an air diffuser inside the nitrification tank through a ventilation pipeline, second carrier particles for fixing nitrifying bacteria and third carrier particles for fixing microorganisms are fluidized, and organic substances or inorganic substances are treated under aerobic conditions; a second grid is arranged inside the nitrification tank to prevent carrier particles and sludge from flowing out; nitrified water flowing out of the nitrification tank is introduced into the biological membrane reaction tank by a water suction pump, and non-permeated water which does not pass through the biological membrane flows back from the water return pipeline and is circulated to the denitrification tank or the nitrification tank or the first sedimentation tank.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a flow diagram of wastewater treatment according to the present invention;
FIG. 2 is a schematic diagram of a wastewater treatment process according to the present invention;
FIG. 3 is a schematic view showing the structure of a wastewater treatment apparatus according to the present invention.
In the figure: 1. a water flow line; 2. a water return pipeline; 3. a first carrier particle; 31. a buffer plate; 4. a second carrier particle; 5. a third carrier particle; 6. a second grid; 7. a biofilm reaction tank; 8. a biofilm; 9. a water pump; 10. an air diffuser; 11. a blower; 12. a rotating electric machine; 13. a rotating blade; 14. a first grid; 15. a first sedimentation tank; 16. a denitrification tank; 17. a nitrification tank; 18. an anaerobic filter.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, an energy-saving and environment-friendly water circulation wastewater treatment device includes a water flow pipeline 1, a water return pipeline 2, first carrier particles 3, a buffer plate 31, second carrier particles 4, third carrier particles 5, a second grid 6, a biofilm reaction tank 7, a biofilm 8, a water pump 9, an air diffuser 10, a blower 11, a rotating motor 12, rotating blades 13, a first grid 14, a first sedimentation tank 15, a denitrification tank 16, a nitrification tank 17, and an anaerobic filter 18;
the first sedimentation tank 15 is used for storing wastewater containing organic substances or inorganic substances, a first grid 14 is arranged in the first sedimentation tank 15, the first grid 14 divides the first sedimentation tank 15 into a wastewater area and a filtering area, a water flow pipeline 1 is arranged in the filtering area of the first sedimentation tank 15, and the water flow pipeline 1 is used for pumping the wastewater primarily filtered by the first grid 14 to a sewage treatment tank;
the sewage treatment pond includes denitrification pond 16 and nitrifies pond 17, 16 internally mounted in denitrification pond has agitating unit, and agitating unit includes waterproof cover, rotating electrical machines 12 and rotating vane 13, the inside at waterproof cover is installed to rotating electrical machines 12, the output shaft of motor passes waterproof cover, and output shaft surface mounting has rotating vane 13, agitating unit is used for stirring the inside waste water in denitrification pond 16, 16 inside first carrier granule 3 of having placed in denitrification pond, be provided with buffer board 31 in the denitrification pond 16, denitrification pond 16 is connected with and nitrifies pond 17, nitrifies the pond 17 outside and installs air-blower 11, nitrify pond 17 internally mounted has air diffuser 10, air-blower 11 passes through air pipe with air diffuser 10 and links to each other, nitrify pond 17 inside placed second carrier granule 4 and third carrier granule 5, a second grid 6 is arranged inside the nitrification tank 17, a water flow pipeline 1 is arranged inside the nitrification tank 17, and the water flow pipeline 1 is used for pumping the wastewater inside the nitrification tank 17 to the biological membrane reaction tank 7;
the air diffuser 10 is a device for transferring oxygen in air into liquid.
A biological membrane 8 is arranged in the biological membrane reaction tank 7, a water flow pipeline 1 is arranged between the nitrification tank 17 and the biological membrane reaction tank 7, a water suction pump 9 is arranged on the surface of the water flow pipeline 1, a water return pipeline 2 is arranged between the nitrification tank 17 and the biological membrane reaction tank 7, and a water return pipeline 2 is arranged between the nitrification tank 17 and the denitrification tank 16 as well as between the nitrification tank 17 and the first sedimentation tank 15;
the water circulation wastewater treatment device also comprises an anaerobic filter 18, and the anaerobic filter 18 is used for receiving wastewater returned by the nitrification tank 17.
The first carrier particles 3 are filled with denitrifying bacteria, the second carrier particles 4 are filled with nitrifying bacteria, the nitrifying bacteria decompose and remove organic matters and inorganic matters contained in the wastewater, the denitrifying bacteria convert nitrite into nitrogen through denitrification to be discharged out of a water body, the concentration of the nitrite is reduced, the denitrifying bacteria convert nitrogen-containing compounds in the water body into nitrogen, the nitrogen concentration in the water body is reduced, eutrophication of the water body is prevented, and the third carrier particles 5 are filled with microorganisms.
Wherein the first sedimentation tank 15 is disposed in front of the sewage treatment tank, the nitrified treated water flowing out of the sewage treatment tank flows to the biofilm reaction tank 7 through the water flow pipe 1, a part of the treated water flows back and circulates to the denitrification tank 16 or the first sedimentation tank 15, and the treated water that does not pass through the biofilm reaction tank 7 flows back and circulates to the nitrification tank 17.
Wherein, the fixed microorganism, the first carrier particle 3 of nitrobacteria or denitrifying bacteria, the second carrier particle 4 and the third carrier particle 5 are acetalized polyvinyl alcohol hydrogel, the acetalized polyvinyl alcohol hydrogel has a latticed surface layer formed by weaving a fibrous body with the diameter of 0.1-50um, the acetalized polyvinyl alcohol hydrogel has 10 grooves on the surface of the hydrogel with the length of every 1mm, the diameter of the groove is 10-100pm, and the depth is 10-100 um.
Wherein the biofilm 8 is a microfiltration range membrane or an ultrafiltration range membrane, and the microfiltration range membrane or the ultrafiltration range membrane is a hydrophilic membrane or a membrane made of hydrophilic substances.
The biological membrane 8 is made of one or more of polysulfone polyacrylonitrile, polyolefins, celluloses, polyamides, polyesters, PWA, polymethacrylates and polyimide, and the biological membrane 8 has a hollow fiber structure and the inner diameter of 1000 mu m.
The method comprises the following specific treatment steps:
the method comprises the following steps: introducing wastewater containing organic substances or inorganic substances into a first sedimentation tank 15, wherein a first grid 14 is arranged in the first sedimentation tank 15, and the first grid 14 is used for carrying out primary sedimentation and filtration on suspended substances contained in the wastewater;
step two: pumping the wastewater filtered by the first grating 14 in the first sedimentation tank 15 to a sewage treatment tank through a water flow pipeline 1, adding the first carrier particles 3 for fixing denitrifying bacteria into a denitrification tank 16, and treating the wastewater under anaerobic conditions; a buffer plate 31 is arranged in the denitrification tank 16, and the front bottom of the buffer plate 31 is bent to prevent carrier particles and sludge from flowing out;
step three: the bottom of the denitrification tank 16 is provided with a stirring device which fluidizes the first carrier particles 3 for fixing denitrifying bacteria;
step four: the wastewater after denitrification flows into a nitrification tank 17, an air blower is arranged outside the nitrification tank 17, the air blower 11 conveys air to an air diffuser 10 in the nitrification tank 17 through a ventilation pipeline, the second carrier particles 4 for fixing nitrifying bacteria and the third carrier particles 5 for fixing microorganisms are fluidized, and organic substances or inorganic substances are treated under aerobic conditions; and the second grid 6 is arranged in the nitrification tank 17 to prevent the carrier particles and the sludge from flowing out;
step five: nitrified water flowing out of the nitrification tank 17 is introduced into the biological membrane reaction tank 7 by the water suction pump 9, and non-permeated water which does not pass through the biological membrane 8 flows back from the water return pipeline 2 and is circulated to the denitrification tank 16 or the nitrification tank 17 or the first sedimentation tank 15;
step six: the clear water discharged from the biofilm reaction tank 7 is used as treated water.
The working principle is as follows: the invention relates to an energy-saving and environment-friendly water circulation wastewater treatment device, which comprises a water flow pipeline 1, a water return pipeline 2, first carrier particles 3, a buffer plate 31, second carrier particles 4, third carrier particles 5, a second grid 6, a biomembrane reaction tank 7, a biomembrane 8, a water suction pump 9, an air diffuser 10, an air blower 11, a rotating motor 12, a rotating blade 13, a first grid 14, a first sedimentation tank 15, a denitrification tank 16, a nitrification tank 17 and an anaerobic filter 18, wherein the water flow pipeline is connected with the water return pipeline 2; introducing wastewater containing organic substances or inorganic substances into a first sedimentation tank 15, wherein a first grid 14 is arranged in the first sedimentation tank 15, and the first grid 14 is used for carrying out primary sedimentation and filtration on suspended substances contained in the wastewater; pumping the wastewater filtered by the first grating 14 in the first sedimentation tank 15 to a sewage treatment tank through a water flow pipeline 1, adding the first carrier particles 3 for fixing denitrifying bacteria into a denitrification tank 16, and treating the wastewater under anaerobic conditions; a buffer plate 31 is arranged in the denitrification tank 16, and the front bottom of the buffer plate 31 is bent to prevent carrier particles and sludge from flowing out; the bottom of the denitrification tank 16 is provided with a stirring device which fluidizes the first carrier particles 3 for fixing denitrifying bacteria; the wastewater after denitrification flows into a nitrification tank 17, an air blower 11 is arranged outside the nitrification tank 17, the air blower 11 conveys air to an air diffuser 10 in the nitrification tank 17 through a ventilation pipeline, the second carrier particles 4 for fixing nitrobacteria and the third carrier particles 5 for fixing microorganisms are fluidized, and organic substances or inorganic substances are treated under aerobic conditions; and the second grid 6 is arranged in the nitrification tank 17 to prevent the carrier particles and the sludge from flowing out; nitrified water flowing out of the nitrification tank 17 is introduced into the biological membrane reaction tank 7 by the water suction pump 9, and non-permeated water which does not pass through the biological membrane 8 flows back from the water return pipeline and is circulated to the denitrification tank 16 or the nitrification tank 17 or the first sedimentation tank 15; the clear water discharged from the biofilm reaction tank 7 is used as treated water.
The invention adopts a three-level wastewater treatment mode, wherein the first-level treatment is to carry out sewage precipitation through the first sedimentation tank 15, and a first grid 14 is arranged in the first sedimentation tank 15, so that larger floaters or solid pollutants in the wastewater are effectively removed; the secondary treatment is that the first carrier particles 3, the second carrier particles 4 and the third carrier particles 5 are added into the nitrification tank 17 and the denitrification tank 16, and the first carrier particles 3, the second carrier particles 4 and the third carrier particles 5 are filled with microorganisms, nitrifying bacteria or denitrifying bacteria, so that organic pollutants in the wastewater can be greatly removed; the third treatment is to make the wastewater pass through a biological membrane reaction tank 7 to further remove pollutants which cannot be removed by the second treatment, wherein the pollutants comprise organic matters, phosphorus, nitrogen and soluble inorganic matters which cannot be degraded by microorganisms.
The sewage treatment tank comprises a denitrification tank 16 and a nitrification tank 17, a stirring device is arranged inside the denitrification tank 16, the stirring device comprises a waterproof sleeve, a rotating motor 12 and rotating blades 13, the rotating motor 12 is arranged inside the waterproof sleeve, an output shaft of the rotating motor 12 penetrates through the waterproof sleeve, the surface of the output shaft is provided with the rotating blades 13, the stirring device is used for stirring wastewater inside the denitrification tank 16, first carrier particles 3 are placed inside the denitrification tank 16, a buffer plate 31 is arranged in the denitrification tank 16, the denitrification tank 16 is connected with the nitrification tank 17, an air blower 11 is arranged outside the nitrification tank 17, an air diffuser 10 is arranged inside the nitrification tank 17, the air blower 11 is connected with the air diffuser 10 through a ventilation pipeline, second carrier particles 4 and third carrier particles 5 are placed inside the nitrification tank 17, a second grid 6 is arranged inside the nitrification tank 17, a water flow pipeline 1 is arranged inside the nitrification tank 17, the water flow pipeline 1 is used for pumping the wastewater in the nitrification tank 17 to the biological membrane reaction tank 7.
Introducing wastewater containing organic substances or inorganic substances into a first sedimentation tank 15, wherein a first grid 14 is arranged in the first sedimentation tank 15, and the first grid 14 is used for carrying out primary sedimentation and filtration on suspended substances contained in the wastewater; pumping the wastewater filtered by the first grating 14 in the first sedimentation tank 15 to a sewage treatment tank through a water flow pipeline 1, adding the first carrier particles 3 for fixing denitrifying bacteria into a denitrification tank 16, and treating the wastewater under anaerobic conditions; a buffer plate 31 is arranged in the denitrification tank 16, and the front bottom of the buffer plate 31 is bent to prevent carrier particles and sludge from flowing out; the bottom of the denitrification tank 16 is provided with a stirring device which fluidizes the first carrier particles 3 for fixing denitrifying bacteria.
The wastewater after denitrification flows into a nitrification tank 17, an air blower 11 is arranged outside the nitrification tank 17, the air blower 11 conveys air to an air diffuser 10 in the nitrification tank 17 through a ventilation pipeline, the second carrier particles 4 for fixing nitrobacteria and the third carrier particles 5 for fixing microorganisms are fluidized, and organic substances or inorganic substances are treated under aerobic conditions; and the second grid 6 is arranged in the nitrification tank 17 to prevent the carrier particles and the sludge from flowing out; the nitrified water flowing out of the nitrification tank 17 is introduced into the biofilm reaction tank 7 by the suction pump 9, and the non-permeated water which does not pass through the biofilm 8 flows back from the water flow pipeline 1 and is circulated to the denitrification tank 16 or the nitrification tank 17 or the first sedimentation tank 15.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean 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 do not necessarily 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.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. The utility model provides an energy-concerving and environment-protective hydrologic cycle effluent treatment plant, includes first sedimentation tank (15), sewage treatment pond and biomembrane reaction tank (7), its characterized in that: the first sedimentation tank (15) is used for storing wastewater containing organic substances or inorganic substances, a first grid (14) is arranged in the first sedimentation tank (15), the first grid (14) divides the first sedimentation tank (15) into a wastewater area and a filtering area, a water flow pipeline (1) is arranged in the filtering area of the first sedimentation tank (15), and the water flow pipeline (1) is used for pumping the wastewater primarily filtered by the first grid (14) to a sewage treatment tank;
the sewage treatment pond includes denitrification pond (16) and nitrifies pond (17), denitrification pond (16) internally mounted has agitating unit, and agitating unit includes waterproof cover, rotating electrical machines (12) and rotating vane (13), the inside at waterproof cover is installed in rotating electrical machines (12), waterproof cover is passed to the output shaft of rotating electrical machines (12), and output shaft surface mounting has rotating vane (13), and agitating unit is used for stirring the inside waste water in denitrification pond (16), first carrier granule (3) have been placed to denitrification pond (16) inside, be provided with buffer board (31) in denitrification pond (16), denitrification pond (16) are connected with and nitrify pond (17), air-blower (11) are installed in nitrification pond (17) outside, nitrification pond (17) internally mounted has air diffuser (10), air-blower (11) link to each other through air pipe with air diffuser (10), second carrier particles (4) and third carrier particles (5) are placed in the nitrification tank (17), a second grid (6) is installed in the nitrification tank (17), a water flow pipeline (1) is installed in the nitrification tank (17), and the water flow pipeline (1) is used for pumping wastewater in the nitrification tank (17) to the biofilm reaction tank (7);
a biological membrane (8) is arranged in the biological membrane reaction tank (7), a water flow pipeline (1) is arranged between the nitrification tank (17) and the biological membrane reaction tank (7), a water suction pump (9) is arranged on the surface of the water flow pipeline (1), a water return pipeline (2) is arranged between the nitrification tank (17) and the biological membrane reaction tank (7), and a water return pipeline (2) is arranged between the nitrification tank (17) and the denitrification tank (16) as well as between the nitrification tank (17) and the first sedimentation tank (15);
the water circulation wastewater treatment device also comprises an anaerobic filter (18), and the anaerobic filter (18) is used for receiving wastewater returned by the nitrification tank (17).
2. The energy-saving and environment-friendly water circulation wastewater treatment device according to claim 1, wherein the first carrier particles (3) are filled with denitrifying bacteria, the second carrier particles (4) are filled with nitrifying bacteria, the nitrifying bacteria decompose and remove organic and inorganic substances contained in the wastewater, the denitrifying bacteria use nitrite as a substrate, the nitrite is converted into nitrogen through denitrification to be discharged out of the water body, the nitrifying bacteria convert nitrogen-containing compounds in the water body into nitrogen, the nitrogen concentration in the water body is reduced, eutrophication of the water body is prevented, and the third carrier particles (5) are filled with microorganisms.
3. An energy-saving and environment-friendly water circulating wastewater treatment device as claimed in claim 1, characterized in that the nitrified treated water flowing out of the wastewater treatment tank flows to the biofilm reaction tank (7) through the water flow pipeline (1), a part of the treated water flows back and circulates to the denitrification tank (16) or the first sedimentation tank (15), and the treated water which does not pass through the biofilm reaction tank (7) flows back and circulates to the nitrification tank (17).
4. The energy-saving and environment-friendly water circulating wastewater treatment device as claimed in claim 1, wherein the first carrier particle (3), the second carrier particle (4) and the third carrier particle (5) for fixing microorganisms, nitrifying bacteria or denitrifying bacteria are acetalized polyvinyl alcohol hydrogel, the acetalized polyvinyl alcohol hydrogel has a latticed surface layer formed by weaving fibrous bodies with diameters of 0.1-50um, the acetalized polyvinyl alcohol hydrogel has 10 grooves on the surface of the hydrogel with the length of every 1mm, the diameter of the groove is 10-100pm, and the depth of the groove is 10-100 um.
5. The energy-saving and environment-friendly water-circulating wastewater treatment device as claimed in claim 1, wherein the biological membrane (8) is a microfiltration range membrane or an ultrafiltration range membrane, and the microfiltration range membrane or the ultrafiltration range membrane is a hydrophilic membrane or a membrane made of hydrophilic substances.
6. An energy-saving and environment-friendly water circulating wastewater treatment device as claimed in claim 1, wherein said biological membrane (8) is made of one or more of polysulfone polyacrylonitriles, polyolefins, celluloses, polyamides, polyesters, PWA, polymethacrylates and polyimides, and said biological membrane (8) has a hollow fiber structure with an inner diameter of 1000 μm.
7. An energy-saving and environment-friendly water circulation wastewater treatment device as claimed in any one of claims 1 to 6, which is characterized by comprising the following specific treatment steps:
the method comprises the following steps: introducing wastewater containing organic substances or inorganic substances into a first sedimentation tank (15), wherein a first grid (14) is arranged in the first sedimentation tank (15), and the first grid (14) is used for carrying out primary sedimentation and filtration on suspended substances contained in the wastewater;
step two: pumping the wastewater filtered by the first grid (14) in the first sedimentation tank (15) to a wastewater treatment tank through a water flow pipeline (1), adding the first carrier particles (3) for fixing denitrifying bacteria into a denitrification tank (16), and treating the wastewater under anaerobic conditions; a buffer plate (31) is arranged in the denitrification tank (16), and the front bottom of the buffer plate (31) is bent to prevent carrier particles and sludge from flowing out;
step three: a stirring device is arranged at the bottom of the denitrification tank (16), and the stirring device fluidizes the first carrier particles (3) for fixing denitrifying bacteria;
step four: the wastewater after denitrification flows into a nitrification tank (17), an air blower is arranged outside the nitrification tank (17), the air blower (11) conveys air to an air diffuser (10) inside the nitrification tank (17) through an air pipeline, second carrier particles (4) for fixing nitrifying bacteria and third carrier particles (5) for fixing microorganisms are fluidized, and organic substances or inorganic substances are treated under aerobic conditions; a second grid (6) is arranged in the nitrification tank (17) to prevent carrier particles and sludge from flowing out;
step five: nitrified water flowing out of the nitrification tank (17) is introduced into the biological membrane reaction tank (7) by a water suction pump (9), and non-permeated water which does not pass through the biological membrane (8) flows back from a water return pipeline and is circulated to the denitrification tank (16) or the nitrification tank (17) or the first sedimentation tank (15);
step six: the clear water flowing out of the biomembrane reaction tank (7) is used as the treated water.
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| TWI747759B (en) * | 2021-03-05 | 2021-11-21 | 梁家源 | Sewage treatment method and device |
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