CN115367950A - Sewage treatment system and method - Google Patents
Sewage treatment system and method Download PDFInfo
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- CN115367950A CN115367950A CN202110540085.2A CN202110540085A CN115367950A CN 115367950 A CN115367950 A CN 115367950A CN 202110540085 A CN202110540085 A CN 202110540085A CN 115367950 A CN115367950 A CN 115367950A
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- 239000010865 sewage Substances 0.000 title claims abstract description 137
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000004062 sedimentation Methods 0.000 claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 19
- 239000004744 fabric Substances 0.000 claims abstract description 16
- 239000000084 colloidal system Substances 0.000 claims abstract description 15
- 239000002957 persistent organic pollutant Substances 0.000 claims abstract description 11
- 230000001112 coagulating effect Effects 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 9
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000010802 sludge Substances 0.000 claims description 62
- 230000003750 conditioning effect Effects 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 16
- 230000018044 dehydration Effects 0.000 claims description 11
- 238000006297 dehydration reaction Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 11
- 238000004065 wastewater treatment Methods 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 4
- 238000005842 biochemical reaction Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 2
- 230000015271 coagulation Effects 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 5
- 231100000719 pollutant Toxicity 0.000 abstract description 5
- 241000700605 Viruses Species 0.000 abstract description 2
- 230000001954 sterilising effect Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 13
- 230000036571 hydration Effects 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- VGPSUIRIPDYGFV-UHFFFAOYSA-N [N].O[N+]([O-])=O Chemical compound [N].O[N+]([O-])=O VGPSUIRIPDYGFV-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000000701 coagulant Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000005653 Brownian motion process Effects 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000032770 biofilm formation Effects 0.000 description 1
- 238000005537 brownian motion Methods 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000001687 destabilization Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- 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
Abstract
The invention discloses a sewage treatment system, comprising: a ultraviolet ray disinfection pond for being directed at sewage carries out preliminary treatment in order to filter the thick grid of bulky object, be used for handling sewage in order to filter the thin grid of small object, a grit chamber for carrying out grit to sewage deposits, a biochemical pond for getting rid of the organic pollutant who is colloid and dissolved state in the sewage, a secondary sedimentation tank for carrying out mud-water separation to sewage, a high-efficient sedimentation tank for carrying out coagulating sedimentation to sewage, a denitrification filter for carrying out denitrification treatment to sewage, a cloth filter for carrying out meticulous filteration to sewage and be used for carrying out ozone sterilization virus killing to sewage through the ultraviolet ray. The sewage treatment system and the sewage treatment method can carry out fine treatment on the sewage and comprehensively remove pollutants in the sewage, thereby effectively improving the sewage treatment quality.
Description
Technical Field
The invention relates to a sewage treatment system and a method.
Background
The sewage treatment device is an industrial device capable of effectively treating domestic sewage, industrial wastewater and the like in urban areas, prevents sewage and pollutants from directly flowing into water areas, and has important significance for improving ecological environment, improving urban grade and promoting economic development. However, the traditional sewage treatment device is simple, the treatment process flow is also simple, and pollutants in sewage cannot be removed comprehensively.
Disclosure of Invention
The invention provides a sewage treatment system and a method, which adopt the following technical scheme:
a wastewater treatment system comprising: the device comprises a coarse grating, a fine grating, a grit chamber, a biochemical chamber, a secondary sedimentation chamber, a high-efficiency sedimentation chamber, a denitrification filter chamber, a cloth filter chamber and an ultraviolet disinfection chamber, wherein the coarse grating is used for pretreating sewage to filter out large-volume objects, the fine grating is used for treating sewage to filter out small-volume objects, the grit chamber is used for carrying out grit sedimentation on sewage, the biochemical chamber is used for removing colloid and dissolved organic pollutants in the sewage, the secondary sedimentation chamber is used for carrying out mud-water separation on sewage, the high-efficiency sedimentation chamber is used for carrying out coagulation sedimentation on sewage, the denitrification filter chamber is used for carrying out denitrification treatment on sewage, the cloth filter chamber is used for finely filtering sewage, and the ultraviolet disinfection chamber is used for carrying out ozone sterilization and disinfection on sewage through ultraviolet rays; the fine grating is communicated to the coarse grating; the grit chamber is communicated to the fine grid; the biochemical tank is communicated to the grit chamber; the secondary sedimentation tank is communicated with the biochemical tank; the high-efficiency sedimentation tank is communicated to a secondary sedimentation tank; the denitrification filter tank is communicated to the high-efficiency sedimentation tank; the cloth filter is communicated to the denitrification filter; the ultraviolet disinfection tank is communicated to the cloth filter.
Further, the sewage treatment system still includes: the sludge concentration tank is used for performing gravity concentration on the sludge in the secondary sedimentation tank; the sludge concentration tank is communicated to the secondary sedimentation tank.
Further, the sewage treatment system still includes: the plate-and-frame filter-pressing dewatering tank is used for mechanically dewatering the sludge in the sludge concentration tank so as to reduce the water content of the sludge to below 60%; the plate frame filter pressing dewatering pool is communicated to the sludge concentration pool.
Further, the sewage treatment system still includes: a sludge conditioning tank for improving sludge in the sludge concentration tank by chemical conditioning to improve sludge dewatering performance; the sludge conditioning tank is positioned between the sludge concentration tank and the plate frame filter-pressing dehydration tank, and two ends of the sludge conditioning tank are respectively communicated to the sludge concentration tank and the plate frame filter-pressing dehydration tank.
Furthermore, the secondary sedimentation tank is also communicated to the biochemical tank to return part of the sludge to the biochemical tank for biochemical reaction.
Further, the grit chamber is a rotational flow grit chamber capable of generating rotational flow for sewage.
Further, a first stirring device used for stirring the sewage in the coarse grating so as to avoid the blockage of the water flow channel by large-volume objects is arranged in the coarse grating.
Further, a second stirring device for stirring the sewage in the fine grating so as to avoid the blockage of the water flow channel by small-volume objects is arranged in the fine grating.
A sewage treatment method applies the sewage treatment system to treat sewage, and comprises the following specific steps:
pretreating the sewage to filter out large-volume objects;
the sewage after pretreatment is treated to filter out small-volume objects;
carrying out gravel precipitation on the sewage with the small-volume objects filtered out;
removing colloid and dissolved organic pollutants in the sewage subjected to grit sedimentation;
carrying out sludge-water separation on the sewage from which the organic pollutants are removed;
carrying out coagulating sedimentation on the sewage subjected to mud-water separation;
carrying out denitrification treatment on the sewage subjected to coagulating sedimentation;
finely filtering the sewage after denitrification treatment;
and carrying out ozone sterilization and disinfection on the sewage subjected to fine filtration through ultraviolet rays.
The sewage treatment system has the advantages that the sewage treatment system is provided with the plurality of treatment tanks, sewage can be finely treated, pollutants in the sewage can be comprehensively removed, and therefore the sewage treatment quality is effectively improved.
Drawings
FIG. 1 is a schematic view of a wastewater treatment system of the present invention;
FIG. 2 is a flow chart of the sewage treatment method of the present invention.
The system comprises a sewage treatment system 10, a coarse grid 11, a first stirring device 12, a fine grid 13, a second stirring device 14, a grit chamber 15, a high-efficiency sedimentation tank 16, a denitrification filter tank 17, a cloth filter tank 18, an ultraviolet disinfection tank 19, a sludge concentration tank 20, a sludge conditioning tank 21, a plate and frame filter pressing dewatering tank 22, a biochemical tank 23 and a secondary sedimentation tank 24.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
As shown in fig. 1 to 2, the present invention provides a sewage treatment system 10 and a sewage treatment method using the same, wherein the sewage treatment system 10 includes: a coarse grating 11, a fine grating 13, a grit chamber 15, a biochemical tank 23, a secondary sedimentation tank 24, a high-efficiency sedimentation tank 16, a denitrification filter tank 17, a cloth filter tank 18 and an ultraviolet disinfection tank 19. The sewage treatment system 10 realizes three-stage treatment of sewage by the structure:
in the first stage of processing: the coarse grid 11 is used for pretreating sewage to filter out large-volume objects, so that the large-volume objects are removed from the sewage; the fine grating 13 is used for treating the sewage to filter out small-volume objects, so that the small-volume objects are removed from the sewage; the grit chamber 15 is used to perform grit sedimentation on the sewage so as to separate grit in the sewage from the sewage, the grit sedimenting at the bottom of the grit chamber 15 and then being cleaned out of the grit chamber 15.
In the second stage of processing: the biochemical tank 23 is used for removing organic pollutants in a colloid and dissolved state in the sewage, so as to remove the organic pollutants in the sewage; the secondary sedimentation tank 24 is used for separating sludge and water from the sewage, so that sludge dissolved in the sewage is separated, the sewage becomes clear, and the separated sludge is settled at the bottom of the secondary sedimentation tank 24 and then is cleaned out of the secondary sedimentation tank 24.
In the third stage of treatment: the high efficiency settling tank 16 is used for coagulating and settling the sewage to further treat the sewage to remove colloids and fine suspended particles. The denitrification filter 17 is used for carrying out denitrification treatment on the sewage so as to remove the nitric acid nitrogen and the structures of suspended matters. The cloth filter 18 is used for fine filtering of the sewage, so as to further filter the sewage after coagulating sedimentation and denitrification treatment, thereby ensuring the quality of the effluent. The ultraviolet disinfection tank 19 performs ozone sterilization and disinfection on the sewage through ultraviolet rays, thereby killing viruses, germs and other microorganisms in the sewage and further realizing comprehensive removal of pollutants in the sewage.
Specifically, before the coagulant is added into the wastewater, the colloid and fine suspended particles in the wastewater have light mass and are collided by the molecular thermal motion of water to make random Brownian motion. The particles all have the same charge, and electrostatic repulsion among the particles prevents the particles from approaching each other and polymerizing into larger particles; secondly, the colloidal particles and the counter ions with charges can generate hydration with the surrounding water molecules to form a hydration shell which can block the polymerization of each colloid. The more charged the colloidal particles of a colloid, the greater its potential; the more counter ions in the diffusion layer, the greater the hydration, and the thicker the hydration layer, and thus the thicker the diffusion layer, the greater the stability. After the coagulant is added to the wastewater, the colloid is reduced or eliminated by the potential, and the stable state of the particles is destroyed (called destabilization). The process of agglomeration of destabilized particles into larger particles is called agglomeration. Unstabilized colloids can also form large particles, a phenomenon known as flocculation. The colloids can be destabilized, coagulated or flocculated in different ways by feeding different chemical agents into the high efficiency settling tank 16, thereby removing the colloids and fine suspended particles in the wastewater.
The denitrification filter 17 adopts quartz sand as a biofilm formation medium of denitrification organisms to remove structures of nitric acid nitrogen and suspended matters, and the denitrification deep-bed filter organically combines denitrification and deep-bed filtering functions together and is a treatment unit integrating biological denitrification and filtering functions.
As a specific structure, the fine grid 13 is communicated to the coarse grid 11 so that the sewage in the coarse grid 11 flows into the fine grid 13. The grit chamber 15 is communicated to the fine grid 13 so that the sewage in the fine grid 13 flows into the grit chamber 15. The biochemical tank 23 is communicated to the grit chamber 15 so that the sewage in the grit chamber 15 flows into the biochemical tank 23. The secondary sedimentation tank 24 is communicated with the biochemical tank 23, so that the sewage in the biochemical tank 23 flows into the secondary sedimentation tank 24. The high-efficiency sedimentation tank 16 is communicated to a secondary sedimentation tank 24 so that the sewage in the secondary sedimentation tank 24 can flow into the high-efficiency sedimentation tank 16. The denitrification filter 17 is communicated to the high-efficiency sedimentation tank 16 so that the sewage in the high-efficiency sedimentation tank 16 flows into the denitrification filter 17. The cloth filter 18 is communicated to the denitrification filter 17 so that the sewage in the denitrification filter 17 flows into the cloth filter 18. The ultraviolet disinfection tank 19 is communicated to the cloth filter 18 so that the sewage in the cloth filter 18 flows into the ultraviolet disinfection tank 19.
As a specific embodiment, the sewage treatment system 10 further includes: a sludge thickener 20. The sludge concentration tank 20 is used for performing gravity concentration on the sludge in the secondary sedimentation tank 24. The sludge concentration tank 20 is communicated to the bottom of the secondary sedimentation tank 24 to discharge the sludge at the bottom of the secondary sedimentation tank 24 to the sludge concentration tank 20.
Further, the sewage treatment system 10 further includes: the plate frame filter pressing dehydration tank 22. The plate-and-frame filter-press dehydration tank 22 is used for mechanically dehydrating the sludge in the sludge concentration tank 20 so as to reduce the water content of the sludge to below 60%. The plate-and-frame filter-press dehydration tank 22 is communicated to the sludge concentration tank 20 so that the sludge in the sludge concentration tank 20 is discharged into the plate-and-frame filter-press dehydration tank 22.
Further, the sewage treatment system 10 further includes: a sludge conditioning tank 21. The sludge conditioning tank 21 is used for improving the sludge in the sludge concentration tank 20 by chemical conditioning to improve the dewatering performance of the sludge. The sludge conditioning tank 21 is positioned between the sludge concentration tank 20 and the plate and frame filter-pressing dewatering tank 22, and two ends of the sludge conditioning tank are respectively communicated with the sludge concentration tank 20 and the plate and frame filter-pressing dewatering tank 22. The sludge in the sludge concentration tank 20 is discharged into a sludge conditioning tank 21 for chemical conditioning and then discharged into a plate-and-frame filter-pressing dehydration tank 22 for mechanical dehydration.
As a specific implementation mode, the secondary sedimentation tank 24 is also communicated to the biochemical tank 23 to return part of the sludge to the biochemical tank 23 for biochemical reaction, so that resource recycling is realized, and the sewage treatment cost is reduced.
As a specific embodiment, the grit chamber 15 is a cyclone grit chamber 15 that can generate cyclone of the sewage, thereby enabling efficient sedimentation of the gravel.
In a specific embodiment, a first stirring device 12 is arranged in the coarse grid 11. The first stirring device 12 is used for stirring the sewage in the coarse grid 11 to avoid the large-volume objects from blocking the water flow channel.
In a specific embodiment, a second stirring device 14 is provided in the fine grille 13. The second stirring device 14 is used for stirring the sewage in the fine grille 13 so as to avoid the small-volume objects from blocking the water flow channel.
The invention also provides a sewage treatment method, which applies the sewage treatment system 10 to treat sewage and comprises the following specific steps: pretreating the sewage to filter out large-volume objects; treating the pretreated sewage to filter out small-volume objects; carrying out gravel sedimentation on the sewage with the small-volume objects filtered out; removing colloid and dissolved organic pollutants in the sewage precipitated by the gravel; carrying out sludge-water separation on the sewage from which the organic pollutants are removed; carrying out coagulating sedimentation on the sewage subjected to mud-water separation; carrying out denitrification treatment on the sewage subjected to coagulating sedimentation; finely filtering the sewage after denitrification treatment; and carrying out ozone sterilization and disinfection on the sewage subjected to fine filtration through ultraviolet rays.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.
Claims (9)
1. A wastewater treatment system, comprising: the device comprises a coarse grating, a fine grating, a grit chamber, a biochemical chamber, a secondary sedimentation chamber, a high-efficiency sedimentation chamber, a denitrification filter chamber, a cloth filter chamber and an ultraviolet disinfection chamber, wherein the coarse grating is used for pretreating sewage to filter out large-volume objects, the fine grating is used for treating sewage to filter out small-volume objects, the grit chamber is used for carrying out grit sedimentation on sewage, the biochemical chamber is used for removing colloid and dissolved organic pollutants in the sewage, the secondary sedimentation chamber is used for carrying out mud-water separation on sewage, the high-efficiency sedimentation chamber is used for carrying out coagulation sedimentation on sewage, the denitrification filter chamber is used for carrying out denitrification treatment on sewage, the cloth filter chamber is used for finely filtering sewage, and the ultraviolet disinfection chamber is used for carrying out ozone sterilization and disinfection on sewage through ultraviolet rays; the fine grating is communicated to the coarse grating; the grit chamber is communicated to the fine grid; the biochemical tank is communicated to the grit chamber; the secondary sedimentation tank is communicated to the biochemical tank; the high-efficiency sedimentation tank is communicated to the secondary sedimentation tank; the denitrification filter tank is communicated to the high-efficiency sedimentation tank; the cloth filter is communicated to the denitrification filter; the ultraviolet disinfection tank is communicated to the cloth filter.
2. The wastewater treatment system according to claim 1,
the sewage treatment system further comprises: the sludge concentration tank is used for performing gravity concentration on the sludge in the secondary sedimentation tank; and the sludge concentration tank is communicated to the secondary sedimentation tank.
3. The wastewater treatment system according to claim 2,
the sewage treatment system further comprises: the plate-frame filter-pressing dehydration tank is used for mechanically dehydrating the sludge in the sludge concentration tank so as to reduce the water content of the sludge to below 60%; and the plate frame filter-pressing dewatering tank is communicated to the sludge concentration tank.
4. The wastewater treatment system of claim 3,
the sewage treatment system further comprises: a sludge conditioning tank for improving sludge in the sludge concentration tank by chemical conditioning to improve sludge dewatering performance; the sludge conditioning tank is positioned between the sludge concentration tank and the plate frame filter-pressing dehydration tank, and two ends of the sludge conditioning tank are respectively communicated to the sludge concentration tank and the plate frame filter-pressing dehydration tank.
5. The wastewater treatment system according to claim 1,
the secondary sedimentation tank is also communicated to the biochemical tank to return part of the sludge to the biochemical tank for biochemical reaction.
6. The wastewater treatment system according to claim 1,
the grit chamber is a rotational flow grit chamber capable of generating rotational flow for sewage.
7. The wastewater treatment system according to claim 1,
and a first stirring device used for stirring the sewage in the coarse grating so as to avoid the blockage of the water flow channel by large-volume objects is arranged in the coarse grating.
8. The wastewater treatment system according to claim 1,
and a second stirring device used for stirring the sewage in the fine grating so as to avoid small-volume objects from blocking the water flow channel is arranged in the fine grating.
9. A sewage treatment method, characterized in that the sewage treatment system of any one of claims 1 to is applied to treat sewage, and the specific steps are as follows:
pretreating the sewage to filter out large-volume objects;
treating the pretreated sewage to filter out small-volume objects;
carrying out gravel sedimentation on the sewage with the small-volume objects filtered out;
removing colloid and dissolved organic pollutants in the sewage subjected to grit sedimentation;
carrying out sludge-water separation on the sewage from which the organic pollutants are removed;
carrying out coagulating sedimentation on the sewage subjected to mud-water separation;
carrying out denitrification treatment on the sewage subjected to coagulating sedimentation;
finely filtering the sewage after denitrification treatment;
and carrying out ozone sterilization and disinfection on the sewage subjected to fine filtration through ultraviolet rays.
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| CN202110540085.2A CN115367950A (en) | 2021-05-18 | 2021-05-18 | Sewage treatment system and method |
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| CN202110540085.2A CN115367950A (en) | 2021-05-18 | 2021-05-18 | Sewage treatment system and method |
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| WO2009140892A1 (en) * | 2008-05-20 | 2009-11-26 | 北京汉青天朗水处理科技有限公司 | Apparatus and process for treating wastewater |
| CN206735884U (en) * | 2017-02-27 | 2017-12-12 | 金润源环境科技（昆山）有限公司 | Biogenic sediment pond |
| CN106830574A (en) * | 2017-04-10 | 2017-06-13 | 湖州新奥克环保科技有限公司 | A kind of New Type of Sewage Treatment System |
| CN107364903A (en) * | 2017-06-16 | 2017-11-21 | 北京汇恒环保工程股份有限公司 | A kind of fine fack trash-removal device and method |
| CN109095707A (en) * | 2018-08-01 | 2018-12-28 | 天津大拇指环境工程有限公司 | A kind of urban wastewater treatment method and system |
| CN109440914A (en) * | 2018-12-23 | 2019-03-08 | 瑞德(新乡)路业有限公司 | A kind of fecal suction truck equipped with anti-blocking pipeline |
| CN212222733U (en) * | 2020-04-01 | 2020-12-25 | 清研环境科技股份有限公司 | Rapid advanced sewage treatment system |
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