CN216191773U - Sewage biochemical treatment system for strengthening phosphorus removal - Google Patents
Sewage biochemical treatment system for strengthening phosphorus removal Download PDFInfo
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- CN216191773U CN216191773U CN202122610134.3U CN202122610134U CN216191773U CN 216191773 U CN216191773 U CN 216191773U CN 202122610134 U CN202122610134 U CN 202122610134U CN 216191773 U CN216191773 U CN 216191773U
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Abstract
The utility model discloses a sewage biochemical treatment system for strengthening phosphorus removal, wherein a sewage tank comprises a main aeration zone, a gas stripping zone and a clarification zone; the sewage enters the main aeration zone and is rapidly mixed with the liquid in the sewage tank in the main aeration zone to form mixed liquid; a stripping zone filler is arranged above a stripping zone aeration pipe of the stripping zone, a phosphorus removing agent is arranged between the stripping zone filler and the stripping zone aeration pipe, a mixed solution vertically and upwards flows through the phosphorus removing agent and the stripping zone filler in sequence through the stripping zone aeration pipe, the mixed solution is rapidly mixed in a short time under the shearing action of the stripping zone filler, and orthophosphate in the mixed solution is fully contacted and reacted with metal ions to form flocs; and a clarification zone filler is arranged in the clarification zone, the mixed liquor enters the clarification zone after passing through the gas stripping zone, the mixed liquor enters the main aeration zone after being clarified by the clarification zone filler, the mixed liquor flows into the main aeration zone again for circulation treatment, and the supernatant is discharged from the sewage tank. The system synchronously removes phosphorus in the biochemical section, ensures the stability of TP, and reduces investment cost and floor area.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a sewage biochemical treatment system for strengthening phosphorus removal.
Background
With the continuous development of economy, the national requirements on the sewage treatment discharge standard are more and more strict, the effect of the existing biochemical technology on phosphorus removal is very limited, and a first-level deep phosphorus removal process is added behind a biochemical process section in order to ensure the stable standard of the total phosphorus of effluent, so that the treatment effect can be ensured, but the investment and the occupied area of sewage treatment are greatly increased.
Chinese patent document CN209507895U discloses a biochemical sewage treatment tank, which is divided into a main aeration zone, a gas stripping zone, a sludge stabilizing zone, a clarification unit, a water inlet channel and a water outlet channel; in this treatment tank, aeration unit and clarification unit switch-on, it is through setting up the filler in clarification unit in order to hold back mud to the sewage discharge after will handling, this kind of biochemical sewage treatment tank is very high to TN's removal efficiency, but does not have better removal effect to TP, and area is big.
SUMMERY OF THE UTILITY MODEL
The utility model provides a sewage biochemical treatment system for strengthening phosphorus removal, and the existing biochemical sewage treatment tank has the following problems of poor TP removal effect and large occupied area.
To solve the above technical problem, an embodiment of the present invention provides the following solutions:
the embodiment of the utility model provides a sewage biochemical treatment system for strengthening phosphorus removal, which comprises a sewage tank, wherein the sewage tank comprises a main aeration zone, a gas stripping zone and a clarification zone;
the main aeration zone is provided with a sewage inlet, sewage enters the main aeration zone from the sewage inlet and is rapidly mixed with liquid in the sewage tank at the sewage inlet in the main aeration zone to form mixed liquid;
a stripping zone filler is arranged above a stripping zone aeration pipe of the stripping zone, a phosphorus removing agent is arranged between the stripping zone filler and the stripping zone aeration pipe, the mixed solution vertically and upwards flows through the phosphorus removing agent and the stripping zone filler in sequence through the stripping zone aeration pipe, the mixed solution is rapidly mixed in a short time under the shearing action of the stripping zone filler, and orthophosphate in the mixed solution is fully contacted with metal ions to react to form flocs;
and a clarification zone filler is arranged in the clarification zone, the mixed liquor enters the clarification zone after passing through the gas stripping zone, the mixed liquor flows into the main aeration zone after being clarified by the clarification zone filler, the mixed liquor is subjected to circulation treatment, and supernatant is discharged from the sewage tank.
Preferably, the clarification zone filler comprises a plurality of layers of filler units, each layer of filler units is arranged to intersect with the adjacent layer of filler units, and the centers of the channels of the filler units vertically correspond to the channel intersections of the adjacent layer of filler units to form a plurality of uniformly distributed multiple channels.
Preferably, the packing of the gas stripping zone comprises a plurality of layers of packing units, each layer of packing unit is arranged to intersect with the adjacent layer of packing unit, and the centers of the channels of the packing units vertically correspond to the channel intersections of the adjacent layer of packing unit to form a plurality of uniformly distributed channels.
Preferably, the bottom of the packing of the stripping zone is 0.5m from the aeration pipe of the stripping zone, and the overall size of the packing of the stripping zone is 6m × 0.6m × 0.8 m.
Preferably, the bottom of the packing of the stripping zone is 0.3m away from the aeration pipe of the stripping zone, and the overall size of the packing of the stripping zone is 1.6m × 0.6m × 0.4 m.
Preferably, the clarification zone filler is made of PVC.
Preferably, the packing material in the gas stripping zone is made of PVC.
Preferably, the filler specific surface area of the clearing zone filler>240m2/m3。
Preferably, the packing specific surface area of the packing in the stripping zone>240m2/m3。
The scheme of the utility model at least comprises the following beneficial effects:
according to the scheme, in the sewage biochemical treatment system, the wastewater and the phosphorus removal agent upwards pass through the shearing of the packing in the gas stripping zone, the rapid mixing is completed in a short time, the orthophosphate in the wastewater is fully contacted and reacted with metal ions to form flocs, the mixed liquid then enters the clarification zone for precipitation, and the supernatant is discharged out of the tank, so that the physicochemical removal of the total phosphorus in the wastewater is realized; under the conditions that the total phosphorus of raw water is not very high and is less than 4mg/L and only one-stage biochemical process can not enable TP to stably reach the discharge standard, a phosphorus removal agent is added between the packing of the gas stripping area and the aeration pipe of the gas stripping area, the purpose of synchronous phosphorus removal can be achieved in the biochemical section, a one-stage deep phosphorus removal process is not required to be added behind the biochemical process section, and the investment cost and the floor area of sewage treatment are reduced while the TP is ensured to be stabilized to be accurate; the chemical agent basically reacts completely after the water is discharged from the clarification zone, and the aeration equipment in the biochemical zone cannot be influenced; the addition of a small amount of flocculant is beneficial to enhancing the sedimentation performance of sludge and effectively reducing the content of SS in the effluent.
Drawings
FIG. 1 is a schematic structural diagram of a sewage biochemical treatment system for enhanced phosphorus removal according to the present invention;
fig. 2 is a view a-a of fig. 1.
Reference numerals:
1. a primary aeration zone; 2. a clarification zone; 3. a stripping zone; 4. an aeration hose of the aeration zone; 5. a clarifying zone filler; 6. packing in a gas stripping zone; 7. and an aeration pipe of a gas stripping area.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1-2, the present embodiment provides a sewage biochemical treatment system for enhanced phosphorus removal, which includes a sewage tank, wherein the sewage tank includes a main aeration zone 1, an air stripping zone 3 and a clarification zone 2; the main aeration zone 1 is provided with a sewage inlet, sewage enters the main aeration zone 1 from the sewage inlet and is rapidly mixed with liquid in the sewage tank at the sewage inlet in the main aeration zone 1 to form mixed liquid; a stripping zone filler 6 is arranged above a stripping zone aeration pipe 7 of the stripping zone 3, a phosphorus removing agent is arranged between the stripping zone filler 6 and the stripping zone aeration pipe 7, a mixed solution vertically and upwards flows through the phosphorus removing agent and the stripping zone filler 6 in sequence through the stripping zone aeration pipe 7, the mixed solution is rapidly mixed in a short time under the shearing action of the stripping zone filler 6, and orthophosphate in the mixed solution is fully contacted and reacted with metal ions to form flocs; the clarification zone filler 5 is arranged in the clarification zone 2, the mixed liquid enters the clarification zone 2 after passing through the gas stripping zone 3, the mixed liquid is clarified by the clarification zone filler 5 and then flows into the main aeration zone 1 for circular treatment, pollutants in the raw water are continuously and efficiently degraded, and the supernatant is discharged from the sewage tank. In the sewage biochemical treatment system, the wastewater and the phosphorus removal agent are upwards sheared by the packing 6 of the gas stripping zone, the rapid mixing is completed in a short time, the orthophosphate in the wastewater is fully contacted and reacted with the metal ions to form flocs, the mixed liquid then enters the clarification zone 2 for precipitation, and the supernatant is discharged out of the tank, so that the physicochemical removal of the total phosphorus in the wastewater is realized; under the conditions that the total phosphorus of raw water is not very high and is less than 4mg/L and only one-stage biochemical process can not enable TP to stably reach the discharge standard, a phosphorus removal agent is added between a packing 6 of a gas stripping area and an aeration pipe 7 of the gas stripping area, the purpose of synchronous phosphorus removal can be achieved in a biochemical section, a one-stage deep phosphorus removal process is not required to be added behind the biochemical process section, and the investment cost and the floor area of sewage treatment are reduced while the TP is ensured to be stabilized to be accurate; the chemical agent basically reacts completely after the water flows out of the clarification zone 2, and the aeration equipment in the biochemical zone cannot be influenced; the addition of a small amount of flocculant is beneficial to enhancing the sedimentation performance of sludge and effectively reducing the content of SS in the effluent.
The clarification zone packing 5 of the embodiment comprises a plurality of layers of packing units, each layer of packing unit is arranged to intersect with the adjacent layer of packing unit, and the center of the channel of the packing unit vertically corresponds to the channel intersection point of the adjacent layer of packing unit to form a plurality of uniformly distributed channels. The clarifying region filler 5 is made of PVC material, and the specific surface area of the clarifying region filler 5>240m2/m 3. The packing 6 of the gas stripping zone comprises a plurality of layers of packing units, each layer of packing unit is arranged in a crossed manner with the adjacent layer of packing unit, and the center of a channel of each packing unit vertically corresponds to the channel cross point of the adjacent layer of packing unit to form a plurality of uniformly distributed channels. The packing 6 in the gas stripping zone is made of PVC material, and the specific surface area of the packing 6 in the gas stripping zone>240m2/m3. When the mixed liquid vertically enters the 6 packing areas of the gas stripping area, the mixed liquid can pass through the channel to the next layer and then is divided into four or more water flows to enter different channels of the new layer respectively, a multi-channel uniform distribution is formed in the space area of the mixed liquid, the flowing steady flow and the hydraulic uniform distribution of the mixed liquid can realize the rapid and uniform mixing of the mixed liquid and the phosphorus removal agent.
Aeration zone aeration hose 4 is provided with in the main aeration zone 1 of this embodiment, and aeration zone aeration hose 4 is connected to the aeration fan through the tuber pipe on, and aeration zone aeration hose 4 can provide sufficient dissolved oxygen for the microbial degradation COD and ammonia nitrogen etc. in the biochemical zone mud.
Example one
This embodiment provides a sewage biochemical treatment system of reinforceing dephosphorization, and certain municipal sewage project is intake and is gone into water through preliminary treatment (grid, desilting pond), gets rid of great suspended solid and grit thing, then gets into the effluent water sump of this embodiment, and the quality of water of intaking requires TCOD: TN is more than 4;
in a sewage tank, the concentration of activated sludge is 6000-10000mg/L, COD, ammonia nitrogen, nitrate nitrogen and total phosphorus are synchronously degraded in the sewage within 10 hours of residence time, a phosphorus removal agent is added to realize chemical auxiliary phosphorus removal, the residual SS forms flocs, suspended matters are intercepted by a fiber rotary disc filter tank, and the effluent is sterilized by an ultraviolet disinfection device and is discharged after reaching the standard. The final effluent reaches the first grade A requirement that COD is less than 50mg/L, TN is less than 15mg/L,NH3-N＜5mg/L，TP＜0.5mg/L；
the size of the wastewater tank is 30.8m × 10.8m × 6.5m (length × width × height), the effective water depth is 6m, the total volume is 2000m3, and the treated water amount is 4000m3D, main aeration zone 1 is 30.8m × 6m × 6.5m (length × 0 width × 1 height), clarification zone 22 is 26.4m × 4.8m × 5.5m (length × width × height), gas stripping is located at one side of clarification zone 2, and gas stripping zone 3 is 6m × 1m × 6m (length × width × height);
by adopting an enhanced phosphorus removal technology, a dosing pipe for adding a phosphorus removal agent and a packing 6 of a gas stripping zone are arranged above an aeration pipe 7 of the gas stripping zone, the total volume size of the packing 6 of the gas stripping zone is 6m multiplied by 0.6m multiplied by 0.8m, the distance from the bottom of the packing 6 of the gas stripping zone to the aeration pipe 7 of the gas stripping zone is 0.5m, and then when the dosage of the phosphorus removal agent added is 150kg/d, the TP of the final effluent is stably less than 0.5 mg/L. The phosphorus removal agent is polyaluminium chloride (PAC).
Example two
The embodiment provides a sewage biochemical treatment system for strengthening phosphorus removal, a certain domestic sewage project has large fluctuation of inflow water quality, floating oil and large suspended matters are removed through pretreatment (oil separation and grid pond), then the sewage enters an adjusting tank to balance water quantity and water quality, and the adjusting tank is arranged to be 45m3The conditioning tank residence time was 12 hours. A submersible pump Q which is 5m is arranged in the regulating reservoir3H, H is 10m, and the effluent uniformly enters a biochemical treatment tank;
in a sewage tank, the concentration of activated sludge is 6000-8000mg/L, COD, ammonia nitrogen, nitrate nitrogen and total phosphorus are synchronously degraded in the sewage within 12 hours of residence time, PFS medicament is added to realize chemical auxiliary phosphorus removal, and residual SS forms floc, suspended matters are intercepted by a sand filter tank, and the effluent is sterilized by an ultraviolet sterilizer and is discharged after reaching the standard. The final effluent reaches the A standard in a certain landmark, namely COD is less than 20mg/L, TN is less than 10mg/L, NH3-N＜1mg/L，TP＜0.2mg/L；
The effluent water sump adopts the steel water tank, and the size is: 7.2m 2.5m 3m (length x width x height), effective water depth 2.5m, total volume 45m3The treated water amount is 90m3D, main aeration zone 1 is 7.2 m.times.1.6 m.times.3 m (length. times.0 width. times.3 m), clarification zone 2 is 7.2 m.times.0.9 m.times.1.3 m (length. times.width. times.height), gas stripping is located on one side of clarification zone 2, gas stripping zone 3 is 1.6 m.times.1 m.times.2.5 m (length. times.width. times.height)X is high);
by adopting an enhanced phosphorus removal technology, a dosing pipe for adding a phosphorus removal agent and a gas stripping zone filler 6 are arranged above an aeration pipe 7 of a gas stripping zone, the total volume size of the gas stripping zone filler 6 is 1.6m multiplied by 0.6m multiplied by 0.4m, the distance from the bottom of the gas stripping zone filler 6 to the aeration pipe is 0.3m, then when the dosage of the phosphorus removal agent added is 11kg/d, the TP of the final effluent is stably less than 0.2mg/L, and the phosphorus removal agent is polyferric sulfate (PFS).
Compared with the prior art, the sewage biochemical treatment system for enhanced phosphorus removal adopts a sewage deep phosphorus removal device in the patent with the publication number of CN212504166U to treat 40000m3Taking/d municipal sewage as an example, ensuring that the TP of the effluent reaches the standard, and ensuring that the volume of a reciprocating type clapboard flocculation tank required by the phosphorus removal device is 400m3(the civil unit price is 700 yuan/m3) The dosage of the required phosphorus removing agent is 4000 kg/d. The sewage biochemical treatment system for enhanced phosphorus removal only needs to install the dosing pipe and the air stripping area filler 6 (the total volume is 9.6 m) in the air stripping area 3 of the sewage pool3The unit price of the filler is 2100 yuan/m3) The dosage of the required phosphorus removing agent is 3000 kg/d. Compared with the method of adding the first-stage dephosphorization process, the system can reduce the cost of the operation medicament by 25 percent and reduce the cost of equipment and civil engineering by more than 90 percent.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (9)
1. The sewage biochemical treatment system for enhancing phosphorus removal is characterized by comprising a sewage tank, wherein the sewage tank comprises a main aeration zone, a gas stripping zone and a clarification zone;
the main aeration zone is provided with a sewage inlet, sewage enters the main aeration zone from the sewage inlet and is rapidly mixed with liquid in the sewage tank at the sewage inlet in the main aeration zone to form mixed liquid;
a stripping zone filler is arranged above a stripping zone aeration pipe of the stripping zone, a phosphorus removing agent is arranged between the stripping zone filler and the stripping zone aeration pipe, the mixed solution vertically and upwards flows through the phosphorus removing agent and the stripping zone filler in sequence through the stripping zone aeration pipe, the mixed solution is rapidly mixed in a short time under the shearing action of the stripping zone filler, and orthophosphate in the mixed solution is fully contacted with metal ions to react to form flocs;
and a clarification zone filler is arranged in the clarification zone, the mixed liquor enters the clarification zone after passing through the gas stripping zone, the mixed liquor flows into the main aeration zone after being clarified by the clarification zone filler, the mixed liquor is subjected to circulation treatment, and supernatant is discharged from the sewage tank.
2. The biochemical sewage treatment system for enhanced phosphorus removal according to claim 1, wherein the filler in the clarification zone comprises a plurality of layers of filler units, each layer of filler units is arranged to intersect with the filler units of the adjacent layer, and the channel centers of the filler units vertically correspond to the channel intersections of the filler units of the adjacent layer to form a plurality of uniformly distributed channels.
3. The sewage biochemical treatment system for enhancing phosphorus removal according to claim 1, wherein the packing of the stripping zone comprises a plurality of layers of packing units, each layer of packing units is arranged to intersect with the adjacent layer of packing units, and the channel centers of the packing units vertically correspond to the channel intersections of the adjacent layer of packing units to form a plurality of uniformly distributed channels.
4. The biochemical phosphorus removal-enhanced sewage treatment system as claimed in claim 1, wherein the bottom of the packing of the stripping zone is 0.5m away from the aeration pipe of the stripping zone, and the overall size of the packing of the stripping zone is 6m x 0.6m x 0.8 m.
5. The biochemical phosphorus removal-enhanced sewage treatment system as claimed in claim 1, wherein the bottom of the packing of the stripping zone is 0.3m away from the aeration pipe of the stripping zone, and the overall size of the packing of the stripping zone is 1.6m x 0.6m x 0.4 m.
6. The biochemical phosphorus removal-enhanced sewage treatment system as claimed in claim 2, wherein the filler in the clarification zone is made of PVC.
7. The phosphorus removal enhanced biochemical sewage treatment system of claim 3, wherein the packing of the stripping zone is made of PVC.
8. The biochemical phosphorus removal-enhanced sewage treatment system of claim 2, wherein the filler specific surface area of the filler in the clarification zone>240m2/m3。
9. The biochemical phosphorus removal-enhanced sewage treatment system as claimed in claim 3, wherein the packing specific surface area of the packing of the stripping zone>240m2/m3。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115490328A (en) * | 2022-10-27 | 2022-12-20 | 恩格拜（武汉）生态科技有限公司 | Built-in denitrification fluidizing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115490328A (en) * | 2022-10-27 | 2022-12-20 | 恩格拜（武汉）生态科技有限公司 | Built-in denitrification fluidizing device |
| CN115490328B (en) * | 2022-10-27 | 2023-11-03 | 恩格拜（武汉）生态科技有限公司 | Built-in denitrification fluidization device |
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