CN219585935U - Denitrification dephosphorization advanced treatment system - Google Patents
Denitrification dephosphorization advanced treatment system Download PDFInfo
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- CN219585935U CN219585935U CN202320480227.5U CN202320480227U CN219585935U CN 219585935 U CN219585935 U CN 219585935U CN 202320480227 U CN202320480227 U CN 202320480227U CN 219585935 U CN219585935 U CN 219585935U
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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
Abstract
The utility model relates to the technical field of sewage treatment, in particular to a denitrification and dephosphorization advanced treatment system, wherein first-stage B section effluent of a sewage treatment plant is collected into a water collecting well, the water collecting well is respectively connected with water inlets of two high-efficiency denitrification biological filters, water outlets of the two high-efficiency denitrification biological filters are connected with a water inlet of a coagulation air floatation tank, and a water outlet of the coagulation air floatation tank is connected with a disinfection tank; the high-efficiency denitrification biological filter and the coagulation air floatation tank are connected with the sludge treatment unit. The utility model gathers the water discharged from the first stage B section into the water collecting well and then enters the high-efficiency denitrification biological filter, total nitrogen is removed through denitrification reaction, the water discharged from the high-efficiency denitrification biological filter enters the coagulation air floatation tank, total phosphorus and suspended matters are removed through coagulation reaction and air floatation separation, the water discharged from the coagulation air floatation tank enters the disinfection tank for disinfection, and the water discharged from the coagulation air floatation tank reaches the first stage A standard and is discharged, so that the stability of a water ecological system and the safety of urban water supply and drinking are ensured, and a series of ecological problems caused by direct discharge of the water discharged from the first stage B section are avoided.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a denitrification and dephosphorization advanced treatment system.
Background
The concentration of total nitrogen and total phosphorus in sewage of an industrial park is high, the sewage is difficult to treat, the conventional treatment process such as AO process and the like can only reach the first-stage B emission standard (20 mg/L of suspended matters, 20mg/L of Total Nitrogen (TN) and 1mg/L of Total Phosphorus (TP)) generally, but the contents of suspended matters, total nitrogen and total phosphorus in the effluent of the first-stage B stage are still very high, and the suspended matters, the total nitrogen and the total phosphorus are directly discharged into rivers and lakes, so that eutrophication of water bodies can be caused, mass algae propagation and water quality deterioration are caused, the stability of a water ecological system is seriously damaged, and urban water supply and drinking water safety are influenced 。
Disclosure of Invention
The utility model aims to provide a denitrification and dephosphorization advanced treatment system which can avoid a series of ecological problems caused by direct discharge of primary B-section effluent and ensure the stability of a water ecological system and the safety of urban water supply and drinking water.
In order to achieve the above purpose, the technical scheme of the utility model is that the advanced nitrogen and phosphorus removal treatment system comprises a water collecting well, a high-efficiency nitrogen removal biological filter, a coagulation air floatation tank, a disinfection tank and a sludge treatment unit, wherein the first-stage B section effluent of a sewage treatment plant is collected into the water collecting well, the water collecting well is respectively connected with water inlets of the two high-efficiency nitrogen removal biological filters, water outlets of the two high-efficiency nitrogen removal biological filters are connected with the water inlet of the coagulation air floatation tank, and the water outlet of the coagulation air floatation tank is connected with the disinfection tank; the efficient denitrification biological filter and the coagulation floatation tank are connected with the sludge treatment unit.
As one of the implementation modes, the high-efficiency denitrification biological filter comprises a water distribution area, a primary denitrification reaction area, a secondary denitrification reaction area, a tertiary denitrification reaction area and a water outlet area which are sequentially connected, wherein the water distribution area is connected with the water collecting well, and the water outlet area is connected with the water inlet of the coagulation air floatation tank.
As one of the implementation modes, the first-stage denitrification reaction zone, the second-stage denitrification reaction zone and the third-stage denitrification reaction zone are respectively provided with a denitrification biological filter layer and an aeration pipe, the aeration pipes are positioned below the denitrification biological filter layers, and the aeration pipes are connected with a blower arranged outside the high-efficiency denitrification biological filter; the water distribution area is connected with a carbon source dosing device.
As one of the implementation modes, a water outlet channel is arranged above the denitrification biological filter material layers of the primary denitrification reaction zone and the secondary denitrification reaction zone, and the water outlet channel is connected with the lower part of the denitrification biological filter material layer of the next denitrification reaction zone; the upper part of the denitrification biological filter layer of the three-stage denitrification reaction zone is communicated with the water outlet zone through water holes.
As one of the implementation modes, the coagulation air floatation tank comprises a coagulation area, an air floatation area, a separation area and a clear water area which are sequentially connected, wherein the coagulation area is connected with a water outlet of the high-efficiency denitrification biological filter tank, and the clear water area is connected with the disinfection tank.
As one embodiment, the coagulation zone is provided with a stirring device, and the coagulation zone is connected with a coagulant dosing device.
As one of the implementation modes, the bottom of the air floatation area is provided with a dissolved air releaser, and the dissolved air releaser is connected with a dissolved air tank arranged outside the coagulation air floatation tank.
As one of the embodiments, a slag scraper and a slag collecting area are arranged at the top of the separation area, and the slag collecting area is connected with the sludge treatment unit.
As one of the implementation modes, the water outlet of the coagulation air floatation tank is connected with the water inlet of the precise filter, and the water outlet of the precise filter is connected with the disinfection tank.
As one of the implementation modes, the sludge treatment unit comprises a biochemical sludge concentration tank, a materialized sludge concentration tank and a spiral shell stacking dehydrator, the efficient denitrification biological filter is connected with the biochemical sludge concentration tank, the coagulation air floatation tank and the precise filter are connected with the materialized sludge concentration tank, and the biochemical sludge concentration tank and the materialized sludge concentration tank are respectively connected with the spiral shell stacking dehydrator through a sludge pump.
Compared with the prior art, the utility model has the beneficial effects that:
(1) The water discharged from the first-stage section B is collected into the water collecting well and then enters the high-efficiency denitrification biological filter, total nitrogen is removed through denitrification reaction, the water discharged from the high-efficiency denitrification biological filter enters the coagulation air floatation tank, total phosphorus and suspended matters are removed through coagulation reaction and air floatation separation, and after the water discharged from the coagulation air floatation tank enters the disinfection tank for disinfection, the water discharged from the coagulation air floatation tank reaches the first-stage A standard and is discharged, so that the stability of a water ecological system and the safety of urban water supply and drinking are ensured, and a series of ecological problems caused by direct discharge of the water discharged from the first-stage section B are avoided; the two high-efficiency denitrification biological filters can be switched and used, and when one high-efficiency denitrification biological filter is used for treating sewage, the other high-efficiency denitrification biological filter can be backwashed, so that the treatment efficiency is improved;
(2) The utility model can directly enter the disinfection tank for disinfection according to the water quality selection of the coagulation air floatation tank for discharge, or enter the precise filter for further reducing the suspended matter concentration and then enter the disinfection tank for disinfection for discharge, thereby improving the water treatment effect and reducing the water treatment cost.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a deep treatment system for nitrogen and phosphorus removal according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a high-efficiency denitrification biological filter provided by an embodiment of the utility model;
FIG. 3 is a schematic diagram of a coagulation floatation tank provided by an embodiment of the present utility model;
in the figure: 1. a water collection well; 2. high-efficiency denitrification biological filter; 201. a water distribution area; 202. a primary denitrification reaction zone; 203. a secondary denitrification reaction zone; 204. a third-stage denitrification reaction zone; 205. a water outlet area; 206. a denitrification biological filter layer; 207. an aeration pipe; 208. a blower; 209. a carbon source dosing device; 210. a water outlet channel; 3. a coagulation floatation tank; 301. a coagulation zone; 302. an air floatation area; 303. a separation zone; 304. a clear water zone; 305. a stirring device; 306. coagulant dosing device; 307. a dissolved air tank; 308. a slag scraping machine; 309. a dross collection area; 4. a sterilizing pool; 5. a precision filter; 6. a biochemical sludge concentration tank; 7. materialized sludge concentration tank.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1-3, the embodiment of the utility model provides a denitrification and dephosphorization advanced treatment system, which comprises a water collecting well 1, a high-efficiency denitrification biological filter tank 2, a coagulation air floatation tank 3, a disinfection tank 4 and a sludge treatment unit, wherein a first-stage section B water outlet collecting pump of a sewage treatment plant is arranged in the water collecting well 1, the water collecting well 1 is respectively connected with water inlets of the two high-efficiency denitrification biological filters 2, water outlets of the two high-efficiency denitrification biological filters 2 are connected with the water inlet of the coagulation air floatation tank 3, and the water outlet of the coagulation air floatation tank 3 is connected with the disinfection tank 4; the efficient denitrification biological filter 2 and the coagulation floatation tank 3 are connected with the sludge treatment unit. In the embodiment, the effluent of the first-stage section B is collected to the water collecting well 1 and then enters the high-efficiency denitrification biological filter 2, total nitrogen is removed through denitrification reaction, the effluent of the high-efficiency denitrification biological filter 2 enters the coagulation air floatation tank 3, total phosphorus and suspended matters are removed through coagulation reaction and air floatation separation, and after the effluent of the coagulation air floatation tank 3 enters the disinfection tank 4 for disinfection, the effluent reaches the first-stage A standard and is discharged, so that the stability of a water ecological system and the safety of urban water supply and drinking water are ensured, and a series of ecological problems caused by direct discharge of the effluent of the first-stage section B are avoided; and the two high-efficiency denitrification biological filters 2 can be switched and used, and particularly, valves can be respectively arranged on pipelines connected with the high-efficiency denitrification biological filters 2 and the water collecting well 1, and when one high-efficiency denitrification biological filter 2 is used for treating sewage, the other high-efficiency denitrification biological filter 2 can be backwashed, so that the water treatment efficiency is improved.
In this embodiment, as shown in fig. 2, the efficient denitrification biological filter 2 includes a water distribution area 201, a primary denitrification reaction area 202, a secondary denitrification reaction area 203, a tertiary denitrification reaction area 204 and a water outlet area 205, which are sequentially connected, wherein the water distribution area 201 is connected with the water collecting well 1, and the water outlet area 205 is connected with a water inlet of the coagulation air floatation tank 3. Further, a denitrification biological filter layer 206 and an aeration pipe 207 are arranged in each of the primary denitrification reaction zone 202, the secondary denitrification reaction zone 203 and the tertiary denitrification reaction zone 204, the aeration pipe 207 is positioned below the denitrification biological filter layer 206, and the aeration pipe 207 is connected with a blower 208 arranged outside the high-efficiency denitrification biological filter 2; the water distribution area 201 is connected with a carbon source dosing device 209. In the embodiment, the carbon source adding device 209 adds an organic carbon source into the water distribution area 201, and sewage after the organic carbon source is added sequentially passes through the primary denitrification reaction area 202, the secondary denitrification reaction area 203 and the tertiary denitrification reaction area 204 to perform three denitrification reactions, so that the total nitrogen removal effect is improved.
Further, a water outlet channel 210 is arranged above the denitrification biological filter layer 206 of the primary denitrification reaction zone 202 and the secondary denitrification reaction zone 203, and the water outlet channel 210 and the lower part of the denitrification biological filter layer 206 of the next denitrification reaction zone 202 can be connected through a pipeline; the upper part of the denitrification biological filter layer 206 of the three-stage denitrification reaction zone 204 is communicated with the water outlet zone 205 through water holes.
In this embodiment, as shown in fig. 3, the coagulation air floatation tank 3 includes a coagulation area 301, an air floatation area 302, a separation area 303 and a clean water area 304 which are sequentially connected, the coagulation area 301 is connected with the water outlet of the high-efficiency denitrification biological filter 2, and the clean water area 304 is connected with the disinfection tank 4. Wherein the coagulation zone 301 is provided with a stirring device 305, and the coagulation zone 301 is connected with a coagulant dosing device 306, specifically, a motor of the stirring device 305 is fixed on the top of the coagulation zone 301, and stirring blades of the stirring device 305 are positioned in water in the coagulation zone 301. The water in the water outlet area 205 of the high-efficiency denitrification biological filter 2 can automatically flow to the coagulation area 301, a coagulant agent such as PAM is added into the coagulation area 301 through a coagulant agent adding device 306, the sewage and the coagulant agent are fully mixed through a stirring device 305 to generate chemical reaction, and then air floatation separation is carried out.
Further, the air floating zone 302 and the separation zone 303 are separated by a short partition, and a dissolved air releaser is arranged at the bottom of the air floating zone 302 and connected with a dissolved air tank 307 arranged outside the coagulation air floating tank 3. Further, a slag scraper 308 and a slag collecting area 309 are arranged at the top of the separation area 303, and the slag collecting area 309 is connected with the sludge treatment unit. The dissolved gas releaser releases a large amount of microbubbles to float the suspended matters out of the water to form waste residues, and then the waste residues are scraped into a scum collecting area 309 by a scum scraper 308 to collect and remove total phosphorus and suspended matters, and the clarified liquid at the lower part automatically flows to a precise filter 5 or a disinfection tank 4 through a pipeline.
In order to further remove suspended matters in the effluent, in this embodiment, a precise filter 5 is added between the coagulation air floatation tank 3 and the disinfection tank 4, and the water outlet of the clean water area 304 of the coagulation air floatation tank 3 is connected with the water inlet of the precise filter 5, and the water outlet of the precise filter 5 is connected with the water inlet of the disinfection tank 4. In some embodiments, suspended matter detection can be performed on water in the clear water area 304 of the coagulation air floatation tank 3, and when suspended matter in the clear water area 304 of the coagulation air floatation tank 3 meets the first-level A standard, the water outlet of the clear water area 304 of the coagulation air floatation tank 3 can be directly connected with the water inlet of the disinfection tank 4 through an overrun pipeline, so that the water treatment efficiency is improved, and the treatment cost is reduced. Optimally, a first valve and a second valve can be respectively arranged on a pipeline between the clear water area 304 of the coagulation air floatation tank 3 and the precision filter 5 and an overrun pipeline between the clear water area 304 of the coagulation air floatation tank 3 and the disinfection tank 4, a water quality monitoring device is arranged in the clear water area 304 of the coagulation air floatation tank 3 to monitor water quality in real time, one valve is selected to be opened and the other valve is selected to be closed according to the condition of water quality, for example, when the concentration of suspended matters in the clear water area 304 of the coagulation air floatation tank 3 exceeds the first-stage A standard, the first valve is selected to be opened and the second valve is selected to be closed, and the clear water area 304 of the coagulation air floatation tank 3 is discharged after the clear water area 304 of the coagulation air floatation tank 3 is directly fed into the disinfection tank 4 for disinfection, for improving the treatment efficiency and reducing the treatment cost when the concentration of suspended matters in the clear water area 304 of the coagulation air floatation tank 3 enters the precision filter 5 for further removing suspended matters so as to meet the first-stage A standard.
Refining the above embodiment, the sludge treatment unit comprises a biochemical sludge concentration tank 6, a materialized sludge concentration tank 7 and a spiral shell overlapping dehydrator, the high-efficiency denitrification biological filter 2 is connected with the biochemical sludge concentration tank 6, the coagulation floatation tank 3 and the precise filter 5 are connected with the materialized sludge concentration tank 7, and the biochemical sludge concentration tank 6 and the materialized sludge concentration tank 7 are respectively connected with the spiral shell overlapping dehydrator through sludge pumps. In the embodiment, the backwash water of the high-efficiency denitrification biological filter 2 automatically flows and is collected to the biochemical sludge concentration tank 6, the backwash water of the precise filter 5 and the materialized sludge flow of the coagulation air floatation tank 3 are uniformly collected to the materialized sludge concentration tank 7, and the sludge in the biochemical sludge concentration tank 6 and the materialized sludge concentration tank 7 is respectively pumped to the spiral shell overlapping dehydrator and is dehydrated by the spiral shell overlapping dehydration system to form a sludge cake for outward transportation standardized treatment.
The advanced treatment system for denitrification and dephosphorization is adopted to treat the first-stage B-stage effluent of the sheep wastewater treatment plant, and the treatment effects of the high-efficiency denitrification biological filter 2, the coagulation air floatation tank 3 and the precise filter 5 are shown in table 1.
TABLE 1 treatment effects of high-efficient denitrification biological Filter, coagulation air floatation tank and precise Filter
As can be seen from Table 1, the effluent after being treated by the high-efficiency denitrification biological filter 2, the coagulation air floatation tank 3 and the precise filter 5 in sequence meets the first-level A standard.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. A denitrification and dephosphorization advanced treatment system is characterized in that: the sewage treatment plant comprises a water collecting well, a high-efficiency denitrification biological filter, a coagulation air floatation tank, a disinfection tank and a sludge treatment unit, wherein the water outlet of the first-stage section B of the sewage treatment plant is collected into the water collecting well, the water collecting well is respectively connected with water inlets of the two high-efficiency denitrification biological filters, water outlets of the two high-efficiency denitrification biological filters are connected with the water inlet of the coagulation air floatation tank, and the water outlet of the coagulation air floatation tank is connected with the disinfection tank; the efficient denitrification biological filter and the coagulation floatation tank are connected with the sludge treatment unit.
2. The advanced nitrogen and phosphorus removal treatment system according to claim 1, wherein: the efficient denitrification biological filter comprises a water distribution area, a primary denitrification reaction area, a secondary denitrification reaction area, a tertiary denitrification reaction area and a water outlet area which are sequentially connected, wherein the water distribution area is connected with the water collecting well, and the water outlet area is connected with a water inlet of the coagulation air floatation tank.
3. The advanced nitrogen and phosphorus removal treatment system according to claim 2, wherein: the primary denitrification reaction zone, the secondary denitrification reaction zone and the tertiary denitrification reaction zone are respectively provided with a denitrification biological filter layer and an aeration pipe, the aeration pipes are positioned below the denitrification biological filter layers, and the aeration pipes are connected with a blower arranged outside the efficient denitrification biological filter; the water distribution area is connected with a carbon source dosing device.
4. The nitrogen and phosphorus removal advanced treatment system according to claim 3, wherein: a water outlet channel is arranged above the denitrification biological filter material layers of the primary denitrification reaction zone and the secondary denitrification reaction zone, and the water outlet channel is connected with the lower part of the denitrification biological filter material layer of the next denitrification reaction zone; the upper part of the denitrification biological filter layer of the three-stage denitrification reaction zone is communicated with the water outlet zone through water holes.
5. The advanced nitrogen and phosphorus removal treatment system according to claim 1, wherein: the coagulation air floatation tank comprises a coagulation area, an air floatation area, a separation area and a clear water area which are sequentially connected, wherein the coagulation area is connected with a water outlet of the high-efficiency denitrification biological filter tank, and the clear water area is connected with the disinfection tank.
6. The advanced nitrogen and phosphorus removal treatment system according to claim 5, wherein: the coagulation area is provided with a stirring device, and the coagulation area is connected with a coagulant dosing device.
7. The advanced nitrogen and phosphorus removal treatment system according to claim 5, wherein: the bottom of the air floatation zone is provided with a dissolved air releaser, and the dissolved air releaser is connected with a dissolved air tank arranged outside the coagulation air floatation tank.
8. The advanced nitrogen and phosphorus removal treatment system according to claim 5, wherein: the top of the separation area is provided with a slag scraping machine and a slag collecting area, and the slag collecting area is connected with the sludge treatment unit.
9. The advanced nitrogen and phosphorus removal treatment system according to claim 1, wherein: the water outlet of the coagulation air floatation tank is connected with the water inlet of the precise filter, and the water outlet of the precise filter is connected with the disinfection tank.
10. The nitrogen and phosphorus removal advanced treatment system according to claim 9, wherein: the sludge treatment unit comprises a biochemical sludge concentration tank, a materialized sludge concentration tank and a spiral shell stacking dehydrator, the high-efficiency denitrification biological filter is connected with the biochemical sludge concentration tank, the coagulation air floatation tank and the precision filter are connected with the materialized sludge concentration tank, and the biochemical sludge concentration tank and the materialized sludge concentration tank are respectively connected with the spiral shell stacking dehydrator through a sludge pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202320480227.5U CN219585935U (en) | 2023-03-14 | 2023-03-14 | Denitrification dephosphorization advanced treatment system |
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| CN202320480227.5U CN219585935U (en) | 2023-03-14 | 2023-03-14 | Denitrification dephosphorization advanced treatment system |
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| CN219585935U true CN219585935U (en) | 2023-08-25 |
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| CN202320480227.5U Active CN219585935U (en) | 2023-03-14 | 2023-03-14 | Denitrification dephosphorization advanced treatment system |
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