CN110590077A - A deep nitrogen and phosphorus removal treatment system coupled with compact MBBR and ultra-efficient separation - Google Patents

Abstract

The invention discloses a deep denitrification and dephosphorization treatment system coupled with compact MBBR and super-efficiency separation, including anoxic pure membrane MBBR pool, aerobic pure membrane MBBR pool, magnetic seed loading pool, flocculation pool and The sedimentation tank, wherein the sedimentation tank is connected to the magnetic seed separation system, the magnetic seed separation system is also connected to the magnetic seed loading tank, the anoxic pure membrane MBBR tank, the aerobic pure membrane MBBR tank, the magnetic seed loading tank, and the flocculation tank are also connected to the Carbon source dosing system, coagulant dosing system, magnetic seed dosing system and coagulant aid dosing system are connected. The beneficial effect of the present invention is that it integrates functions such as nitrogen removal, phosphorus removal, and SS removal, strengthens the removal effect of TN, TP, and SS in the sewage of sewage treatment plants, enhances the stability of system operation, and has compact technological process and occupies less land. ; At the same time, it has the advantages of small head loss, simple design, manufacture and installation, no backwashing process, and few supporting facilities.

Description

A deep nitrogen and phosphorus removal treatment system coupled with compact MBBR and ultra-efficient separation

technical field

The invention relates to the technical field of sewage treatment, in particular to a deep nitrogen and phosphorus removal treatment system coupled with a compact MBBR and super-efficient separation.

Background technique

In recent years, with the rapid development of the national economy, a large amount of nutrients such as nitrogen and phosphorus have been taken into the waters, causing environmental problems such as blue-green algae outbreaks. With the in-depth development of the "Water Pollution Prevention and Control Action Plan" (Water Ten Articles), the comprehensive elimination of inferior V water bodies is one of the current key goals. Since a large amount of effluent treated by sewage treatment plants is discharged into the water environment, the quality of the water environment is directly affected, and the first-level A standard of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) implemented by urban sewage treatment plants is still close to the surface inferior V The water quality of urban sewage treatment plants urgently needs to be further improved. Some areas and environmentally sensitive waters have introduced more stringent local discharge standards or quasi-surface IV\III water standards, and even need to reach TN≤3-5mg/L, TP≤ The strict standard of 0.1mg/L. Sewage treatment plants in different functional areas implement corresponding water environment quality standards, which can provide high-quality supplementary water sources for receiving water bodies, and are of great significance for restoring and improving the water environment.

The removal of TN in existing sewage treatment plants mainly relies on the biochemical system. The amount of treated water and discharge standards change during the actual operation process. At the same time, due to the influence of seasons, the removal of TN in the biochemical system of most urban sewage treatment plants has reached the upper limit, which is difficult to meet. Emission Standards. Some sewage treatment plants have been upgraded and upgraded by "increasing the standard and increasing the volume". Due to the interference of factors such as land shortage, water quality fluctuations, time-consuming renovation, and inability to stop production, the original biochemical system is difficult to further "upgrade" and stabilize to meet stricter discharge standards. .

In order to meet high discharge standards, deep denitrification and dephosphorization treatment processes are more and more widely used in sewage treatment projects, such as denitrification deep bed filters, high-density sedimentation tanks, micro-sand loading sedimentation tanks, magnetic loading coagulation sedimentation tanks, etc. Among them, although the denitrification deep bed filter has treatment effects on TN, TP and SS, it cannot achieve high treatment efficiency on all indicators at the same time, and it is difficult to control the addition of carbon sources, resulting in the increase of COD in the effluent, water head Large losses, difficult design, manufacture and installation, large amount of backwash water, easy hardening of filter materials, and many supporting facilities; high-density sedimentation tanks, micro-sand loading sedimentation tanks, magnetic loading coagulation sedimentation tanks and other processes have better advantages Phosphorus and SS removal effects, but cannot effectively remove TN.

Contents of the invention

In order to solve the problems existing in the above-mentioned prior art, the present invention proposes a deep denitrification and dephosphorization treatment system process coupled with compact MBBR and super-efficiency separation, which integrates functions such as denitrification, phosphorus removal, and SS removal, and strengthens the sewage treatment plant The removal effect of TN, TP, and SS in the tail water, while ensuring that the COD of the effluent does not increase, and enhancing the stability of the system operation; at the same time, it has the advantages of small head loss, simple design, manufacture and installation, no backwashing process, and few supporting facilities, etc. advantage.

To achieve the above object, the present invention adopts the following technical solutions:

A deep denitrification and dephosphorization treatment system coupled with compact MBBR and super-efficiency separation, including anoxic pure membrane MBBR tank, aerobic pure membrane MBBR tank, magnetic seed loading tank, flocculation tank and sedimentation tank connected in sequence. , the sedimentation tank is connected to the magnetic seed separation system, the magnetic seed separation system is also connected to the magnetic seed loading tank, the anoxic pure membrane MBBR tank, the aerobic pure membrane MBBR tank, the magnetic seed loading tank, and the flocculation tank are also They are respectively connected with the carbon source dosing system, coagulant dosing system, magnetic seed dosing system and coagulant aid dosing system.

As a further preference of the present invention, the anoxic pure membrane MBBR pool is provided with a water inlet, an anoxic mixed solution outlet, and a carbon source input inlet, and the sewage enters the anoxic pure membrane MBBR pool through the water inlet, and is injected into the anoxic pure membrane MBBR pool through the carbon source. The inlet is used to add carbon source into the anoxic pure membrane MBBR pool; the anoxic pure membrane MBBR pool is also equipped with anoxic agitator, and the bottom perforated aeration can be added as required.

As a further preference of the present invention, the anoxic mixed solution inlet, the aerobic mixed solution outlet, the coagulant input inlet are set on the aerobic pure membrane MBBR pool, the anoxic mixed solution inlet and the anoxic pure membrane MBBR pool The mixed liquid outlet is connected, and the coagulant is added to the aerobic pure membrane MBBR tank through the coagulant input inlet. The bottom of the aerobic pure membrane MBBR tank is also equipped with an aeration system, and the aeration system adopts perforated aeration Or microporous aeration or a combination of the two, and agitators can be added as needed.

As a further preference of the present invention, the magnetic seed loading pool is provided with a magnetic seed feeding inlet, a magnetic seed recycling inlet, a sludge return inlet, an aerobic mixed liquid inlet, and a magnetic seed loading pool outlet, and the magnetic seeds pass through the magnetic seed feeding inlet. The aerobic mixed liquid inlet is connected to the aerobic mixed liquid outlet on the aerobic pure membrane MBBR pool, and a vertical stirrer is arranged inside the magnetic seed loaded pool.

As a further preference of the present invention, the coagulation aid input inlet, the magnetic seed loading pool inlet and the flocculation pool outlet are set on the flocculation pool, and the coagulation aid is added to the flocculation pool through the coagulant aid input inlet, and the magnetic seed loading pool The inlet is connected with the outlet of the magnetic seed loading pool on the magnetic seed loading pool, and a vertical stirrer is arranged inside the flocculation pool.

As a further preference of the present invention, the flocculation tank inlet, the sludge return outlet, the excess sludge outlet and the sedimentation tank outlet are set on the settling tank, the flocculation tank inlet is connected with the flocculation tank outlet on the flocculation tank, and the sludge return outlet is connected with the sludge Return inlet; the sedimentation tank is selected from one of the horizontal flow sedimentation tank, the vertical flow sedimentation tank, the inclined tube (plate) sedimentation tank and the radial flow sedimentation tank.

As a further preference of the present invention, the magnetic seed separation system includes a high shear machine and a magnetic separator, and the magnetic seed separation system is provided with an inlet of excess sludge, a reclaimed magnetic seed outlet, and a sludge discharge outlet, and the residual sludge of the magnetic seed separation system The mud inlet is connected to the excess sludge outlet on the settling tank, the recovery magnetic seed outlet is connected to the recovery magnetic seed inlet, and the sludge is discharged from the system through the sludge discharge outlet.

As a further preference of the present invention, the main component of the magnetic seed added in the magnetic seed dosing system is Fe ₃ O ₄ , and the particle size range is 40-200 μm; the flocculant added in the coagulant dosing system is selected from PAC , FeSO ₄ , FeCl ₂ , Fe ₂ (SO ₄ ) ₃ , FeCl ₃ , polyferric sulfate (PFS), polyaluminum ferric chloride (PAFC) and polyaluminum ferric silicate (PSAF).

As a further preference of the present invention, the anoxic pure membrane MBBR pool and the aerobic pure membrane MBBR pool are all filled with a suspension carrier, and the filling rate of the suspension carrier in the anoxic pure membrane MBBR pool is 15%-67%. The load is 0.4-2.8gN/(m ² ·d); the filling rate of the suspended carrier in the aerobic pure membrane MBBR tank is 15%-67%, and the membrane surface load is 0.4-1.2gN/(m ² ·d).

As a further preference of the present invention, the shape of the suspension carrier is at least one of columnar, spherical and rectangular, the material of the suspension carrier is at least one of HDPE, PE, PUR, PP and PU, and the diameter or side length is 10-40mm.

In the present invention, the work process of each part is:

In the anoxic pure membrane MBBR tank, after the sewage is mixed with an external carbon source, the denitrifying functional bacteria attached to the suspension carrier use the nitrate in the sewage and the supplementary organic carbon source to perform denitrification to strengthen the system denitrification, and then Self-flow to the aerobic pure membrane MBBR pool.

In the aerobic pure membrane MBBR pool, the nitrifying functional bacteria attached to the suspension carrier can nitrify or decarbonize the ammonia nitrogen and COD in the anoxic mixture to ensure the discharge of ammonia nitrogen and COD up to the standard; at the same time, in the aerobic pure membrane Coagulants are added to the end of the MBBR tank to provide complete mixing conditions and sufficient reaction time, strengthen chemical phosphorus removal, and reduce the mixing tank and its supporting facilities in the ultra-efficient separation system.

In the ultra-efficient separation system, a magnetic seed loading tank, flocculation tank, sedimentation tank, and magnetic seed separation system are set up, and the specific gravity and sedimentation effect of sludge flocs are improved by adding magnetic seeds and coagulants. The specific working process of the ultra-efficient separation system is as follows:

In the magnetic seed loading tank, the magnetic seeds, recycled magnetic seeds, return sludge and aerobic mixed solution are further fully mixed and reacted by a vertical mixer to improve phosphorus removal efficiency and reduce chemical dosage.

In the flocculation tank, the sludge flocs are fully combined with the magnetic seeds by adding the coagulant PAM to form large and dense sludge flocs, so as to increase the specific gravity of the sludge flocs and strengthen the sedimentation effect of the sludge flocs. Then flow to the sedimentation tank.

In the sedimentation tank, the mud-water separation is carried out on the mixed solution of the flocculation tank, and part of the separated residual sludge containing magnetic seeds flows back into the magnetic seed loading tank, and the other part enters the magnetic separation system; the returned sludge containing magnetic seeds returns to the magnetic seed loading tank. The pool can improve the efficiency of phosphorus removal and reduce the dosage of chemicals.

In the magnetic seed separation system, the residual sludge containing magnetic seeds is stripped from the magnetic seeds and the discharge sludge by the high shear machine in turn, and then the magnetic seeds and the discharge sludge are separated by the magnetic separator, and the separated magnetic seeds are returned to the magnetic In this kind of loading tank, the separated discharge sludge will be discharged out of the system.

The beneficial effects of the present invention are that, compared with conventional denitrification and phosphorus removal technologies, the present invention has:

1) Highly integrated MBBR process and magnetic separation technology, breaking through the limitations of conventional nitrogen and phosphorus removal processes on TN and TP removal, to strengthen the removal of TN, SS, TP and other pollutants, and can stably meet the emission standards of quasi-IV and above.

2) The biofilm attached to the suspension carrier in the MBBR forms an aerobic/anoxic environment in space, which provides a good micro-environment for the simultaneous nitrification and denitrification, which can reduce the dosage of external carbon sources and reduce the consumption of chemicals.

3) Adding coagulant at the end of the aerobic pure membrane MBBR tank can reduce the mixing tank and supporting facilities in the traditional super-efficient separation system, and provide complete mixing conditions and sufficient reaction time at the same time. The process is compact and saves energy and reduces consumption.

4) It has the advantages of high process integration, good effect, reliable operation, convenient management, and less land occupation.

In summary, the front stage of the system process is centered on the A/O pure membrane MBBR process. By adding a suspension carrier to the anoxic/aerobic tank, the bacteria with denitrification or nitrification functions are attached to the suspension carrier to strengthen the system's denitrification and removal. carbon; then by adding coagulant to the aerobic pure membrane MBBR tank, the chemical phosphorus removal of the system is strengthened, and the setting of the coagulant mixing tank is reduced; the latter part of the system process takes the ultra-efficient separation process as the core, and strengthens the system's ability to control COD and TP , SS and other pollutants removal.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the structure of the embodiment.

Among them, 1-water inlet pipe; 2-anoxic pure membrane MBBR tank; 3-anoxic agitator; 4-carbon source dosing system; 5-anoxic suspension carrier; 6-aerobic pure membrane MBBR tank; 7-mixing Coagulant dosing system; 8-Aerobic suspension carrier; 9-Aeration system; 10-Blower; 11-Magnetic seed loading tank; 12-Vertical agitator; 13-Magnetic seed dosing system; 14-Flocculation tank; 15- coagulant aid dosing system; 16- sedimentation tank partition; 17- sedimentation tank; 18- heavy-duty mud scraper; 19- sludge bucket; 20- inclined pipe; 21- collecting channel; 22- outlet pipe; 23-Sludge return pump; 24-Excess sludge pipe; 25-Return sludge pipe; 26-High shear machine; 27-Magnetic separator;

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

As shown in Figure 1, a compact MBBR and ultra-efficient separation coupling deep nitrogen and phosphorus removal treatment system, including anoxic pure membrane MBBR pool, aerobic pure membrane MBBR pool, magnetic seed loading pool, flocculation Pool and sedimentation tank, wherein, the above-mentioned sedimentation tank is connected to the magnetic seed separation system, and the magnetic seed separation system is also connected to the above-mentioned magnetic seed loading pool, the above-mentioned anoxic pure membrane MBBR pool, aerobic pure membrane MBBR pool, magnetic seed loading pool, The flocculation tank is also connected with the carbon source dosing system, the coagulant dosing system, the magnetic seed dosing system and the coagulant dosing system respectively.

In particular, the above-mentioned anoxic pure membrane MBBR pool is provided with a water inlet, anoxic mixed solution outlet, and a carbon source input inlet. Carbon sources are added to the pure membrane MBBR tank; the above-mentioned anoxic pure membrane MBBR tank is also equipped with an anoxic agitator, and bottom perforated aeration can be added as needed.

In particular, the above-mentioned aerobic pure membrane MBBR pool is provided with an anoxic mixed solution inlet, an aerobic mixed solution outlet, and a coagulant input inlet, and the anoxic mixed solution inlet is connected with the anoxic mixed solution outlet on the anoxic pure membrane MBBR pool, The coagulant is added to the aerobic pure membrane MBBR tank through the coagulant feeding inlet. The bottom of the aerobic pure membrane MBBR tank is also equipped with an aeration system. The aeration system adopts perforated aeration, and additional settings can be added as needed. mixer.

In particular, the above-mentioned magnetic seed loading pool is provided with a magnetic seed input inlet, a magnetic seed recovery inlet, a sludge return inlet, an aerobic mixed liquid inlet, and a magnetic seed loading pool outlet, and the magnetic seeds are added to the magnetic seed through the magnetic seed input inlet. In the loading tank, the inlet of the aerobic mixed solution is connected to the outlet of the aerobic mixed solution on the aerobic pure membrane MBBR tank, and a vertical stirrer is arranged inside the magnetic seed loading tank.

In particular, the above-mentioned flocculation pool is provided with a coagulant aid input inlet, a magnetic seed loading pool inlet, and a flocculation pool outlet. The outlet of the magnetic seed loading pool on the pool is connected, and a vertical stirrer is arranged inside the above-mentioned flocculation pool.

In particular, the above-mentioned sedimentation tank is provided with a flocculation tank inlet, a sludge return outlet, an excess sludge outlet and a sedimentation tank outlet, the flocculation tank inlet is connected to the flocculation tank outlet on the flocculation tank, and the sludge return outlet is connected to the sludge return inlet; The pool adopts the advection sedimentation tank.

In particular, the above-mentioned magnetic seed separation system includes a high shear machine and a magnetic separator. The magnetic seed separation system is provided with an inlet for excess sludge, an outlet for recovering magnetic seeds, and a sludge discharge outlet. The outlet of the remaining sludge is connected, the outlet of the recovered magnetic seeds is connected with the inlet of the recovered magnetic seeds, and the sludge is discharged out of the system through the sludge discharge outlet; the high shear machine will part of the magnetic seeds in the remaining sludge collected at the bottom of the sedimentation tank and the discharged sewage Sludge stripping, the magnetic separator separates the magnetic seeds and the discharge sludge, and then returns the recovered magnetic seeds to the magnetic seed loading pool.

In particular, the main component of the magnetic seed added in the above-mentioned magnetic seed dosing system is Fe ₃ O ₄ , and the particle size range is 40-200 μm; the flocculant used in the coagulant dosing system is PAC.

In particular, the above-mentioned anoxic pure membrane MBBR pool and aerobic pure membrane MBBR pool are filled with suspended carriers, the filling rate of the suspended carrier in the anoxic pure membrane MBBR pool is 30%, and the membrane surface load is 1.5gN/(m ² ·d); the filling rate of the suspended carrier in the aerobic pure membrane MBBR tank is 40%, and the membrane surface load is 1.2gN/(m ² ·d).

In particular, the shape of the suspension carrier is columnar, and the material of the suspension carrier is HDPE with a diameter of 25 mm.

Example 2

The difference with embodiment 1 is:

The bottom of the above-mentioned aerobic pure membrane MBBR tank is also equipped with an aeration system, which adopts microporous aeration,

The above-mentioned sedimentation tank is a vertical flow sedimentation tank.

The flocculant added in the coagulant dosing system is PSAF.

The above-mentioned anoxic pure membrane MBBR pool and aerobic pure membrane MBBR pool are filled with suspended carriers, the filling rate of the suspended carrier in the anoxic pure membrane MBBR pool is 25%, and the membrane surface load is 0.8gN/(m ² ·d) ; The filling rate of the suspended carrier in the aerobic pure membrane MBBR pool is 25%, and the membrane surface load is 0.8gN/(m ² ·d).

The shape of the suspension carrier is spherical, the material of the suspension carrier is PP, and the diameter is 38mm.

Example 3

The difference with embodiment 1 is:

The bottom of the above-mentioned aerobic pure membrane MBBR tank is also equipped with an aeration system, and the aeration system adopts the combination of "perforation + micropore" aeration.

The above-mentioned sedimentation tank is selected as inclined tube (plate) sedimentation tank.

The flocculant added in the coagulant dosing system is Fe ₂ (SO ₄ ) ₃ .

The above-mentioned anoxic pure membrane MBBR pool and aerobic pure membrane MBBR pool are all filled with suspended carriers, the filling rate of the suspended carrier in the anoxic pure membrane MBBR pool is 35%, and the membrane surface load is 1.2gN/(m ² ·d) ; The filling rate of the suspended carrier in the aerobic pure membrane MBBR pool is 35%, and the membrane surface load is 0.6gN/(m ² ·d).

The shape of the suspension carrier is rectangular, the material of the suspension carrier is PUR, and the diameter is 20mm.

Example

As shown in Figure 2, a compact MBBR and ultra-efficient separation coupled deep nitrogen and phosphorus removal treatment system, including anoxic pure membrane MBBR pool 2, aerobic pure membrane MBBR pool 6, magnetic seed loading pool connected in sequence 11, flocculation tank 14 and settling tank 17, wherein, settling tank 17 is connected to magnetic seed separation system, magnetic seed separation system is also connected to magnetic seed loading pool 11, anoxic pure membrane MBBR pool 2, aerobic pure membrane MBBR pool, The magnetic seed loading pool 11 and the flocculation pool 14 are also respectively connected with the carbon source dosing system 4, the coagulant dosing system 7, the magnetic seed dosing system 13 and the coagulant aid dosing system 15; the anoxic pure membrane MBBR pool 2. The aerobic pure membrane MBBR pool 6, the magnetic seed loading pool 11, the flocculation pool 14, and the sedimentation pool 17 are connected to each other in sequence through the water hole on the wall of the pool body.

The anoxic pure membrane MBBR pool 2 is provided with a water inlet pipe 1, the water inlet pipe 1 is arranged on the upper part of the anoxic pure membrane MBBR pool 2, the anoxic agitator 3 is located inside the anoxic pure membrane MBBR pool 2, and the carbon source dosing system 4 Set above the anoxic pure membrane MBBR pool 2, the anoxic suspension carrier 5 is filled in the anoxic pure membrane MBBR pool 2.

Specifically, the anoxic suspension carrier 5 is a columnar suspension carrier made of HDPE with a diameter of 25mm; the filling rate of the anoxic suspension carrier 5 is 40%; the carbon source added in the carbon source dosing system 4 is glucose.

The aerobic pure membrane MBBR tank 6 is filled with aerobic suspension carrier 8, the coagulant dosing system 7 is set above the aerobic pure membrane MBBR tank, and the aeration system 9 is set at the bottom of the aerobic pure membrane MBBR tank 6, The aeration system 9 is connected with a blower 10 .

In particular, the aerobic suspension carrier 8 is a columnar suspension carrier made of HDPE with a diameter of 25 mm. The filling rate of the aerobic suspension carrier 8 is 50%. The coagulant added by the coagulant dosing system 7 is PAC. The air system 9 selects the combined aeration of "perforation + micropore".

The inside of the magnetic seed loading pool 11 is provided with a vertical agitator 12 , the magnetic seed dosing system 13 is placed above the magnetic seed loading pool 11 , and the blower 10 is located below the magnetic seed loading pool 11 .

In particular, the main component of the magnetic species is Fe ₃ O ₄ , and the particle size range is 40-200 μm.

A vertical agitator 12 is arranged inside the flocculation tank 14, and the magnetic seed dosing system 13 is placed above the flocculation tank 14;

The sedimentation tank 17 adopts an inclined tube sedimentation tank, and the sedimentation tank partition 16, the heavy-duty mud scraper 18, the sludge bucket 19, the inclined pipe 20, the water collection channel 21 and the outlet pipe 22 are arranged in the sedimentation tank 17; Sludge hopper 19, heavy-duty mud scraper 18 is installed above the sludge hopper 19, inclined pipe 20 is arranged in the middle and upper part of sedimentation tank 17, and inclined pipe 20 is also connected with sedimentation tank partition 16, and water collecting channel 21 is arranged to connect with inclined pipe Directly above the 20, the water outlet pipe 22 communicates with the water collecting channel 21.

In particular, the sludge return pump 23 is connected to the sludge hopper 19 of the sedimentation tank 17, the sludge return pipeline is divided into two paths, and the flow rate is regulated by the opening of the valve; wherein, the return sludge pipe 25 is connected to the magnetic seed loading tank 11, The remaining sludge pipe 24 links to each other with the high shear machine 26, and the high shear machine 26 links to each other with the magnetic separator 27, and the high shear machine 26 and the magnetic separator 27 are positioned at the top of the settling tank 17; The recovered magnetic seed replenishment pipe 28 flows into the magnetic seed loading tank 11 , and the separated discharge sludge is discharged out of the system through the discharge sludge pipe 29 .

A village and town sewage treatment project is used to treat the effluent of the secondary sedimentation tank. The design water volume is 2000m ³ /d, and the effluent requirements after treatment meet the quasi-Class III effluent requirements. The specific data are shown in the table below:

Table 1 Average influent and effluent water quality of a village and town sewage treatment project

Note: The data are the average influent and effluent water quality of the system.

The project can effectively remove various pollutants in the water, and the indicators of the effluent are better than the quasi-III category effluent discharge limit requirements; the removal rates of CODcr, BOD ₅ , ammonia nitrogen, total nitrogen, total phosphorus, and SS are 40.64% and 61.19% respectively , 90.45%, 71.53%, 84.44%, 78.65%. Further reduce the discharge of pollutants in the effluent and reduce the impact on the environment. Among them, CODcr emissions are reduced by 8.40 tons/year, BOD ₅ emissions are reduced by 2.99 tons/year, ammonia nitrogen emissions are reduced by 1.45 tons/year, total nitrogen emissions are reduced by 7.15 tons/year, total phosphorus emissions are reduced by 0.28 tons/year, and SS emissions are reduced by 11.02 tons /year.

Of course, the above descriptions are not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or replacements made by those skilled in the art within the scope of the present invention shall also belong to the present invention. protection scope of the invention.

Claims (10)

1. The utility model provides a compact MBBR and super-efficient separation coupled's degree of depth nitrogen and phosphorus removal processing system which characterized in that, includes oxygen deficiency pure film MBBR pond, good oxygen pure film MBBR pond, magnetism kind loading pond, flocculation basin and the sedimentation tank that links to each other in proper order, wherein, the sedimentation tank is connected to magnetism kind piece-rate system, magnetism kind piece-rate system still with magnetism kind loading pond links to each other, oxygen deficiency pure film MBBR pond, good oxygen pure film MBBR pond, magnetism kind loading pond, flocculation basin still are connected with carbon source dosing system, coagulant dosing system, magnetism kind dosing system and coagulant aid dosing system respectively.

2. The compact MBBR and super-efficient separation coupled deep nitrogen and phosphorus removal treatment system of claim 1, wherein the anoxic pure membrane MBBR tank is provided with a water inlet, an anoxic mixed liquid outlet and a carbon source adding inlet, sewage enters the anoxic pure membrane MBBR tank through the water inlet, and a carbon source is added into the anoxic pure membrane MBBR tank through the carbon source adding inlet; an anoxic stirrer is further arranged in the anoxic pure film MBBR tank, and bottom perforation aeration can be added according to needs.

3. The system of claim 1, wherein the aerobic membrane MBBR tank is provided with an anoxic mixed liquid inlet, an aerobic mixed liquid outlet and a coagulant adding inlet, the anoxic mixed liquid inlet is connected with the anoxic mixed liquid outlet on the anoxic membrane MBBR tank, the coagulant is added into the aerobic membrane MBBR tank through the coagulant adding inlet, the bottom of the aerobic membrane MBBR tank is further provided with an aeration system, the aeration system adopts perforation aeration or micropore aeration or a combination of the perforation aeration and the micropore aeration, and a stirrer can be additionally arranged according to requirements.

4. The system of claim 1, wherein the magnetic seed loading tank is provided with a magnetic seed feeding inlet, a magnetic seed recovery inlet, a sludge return inlet, an aerobic mixed liquid inlet and a magnetic seed loading tank outlet, magnetic seeds are fed into the magnetic seed loading tank through the magnetic seed feeding inlet, the aerobic mixed liquid inlet is connected with the aerobic mixed liquid outlet on the aerobic pure membrane MBBR tank, and a vertical stirrer is arranged inside the magnetic seed loading tank.

5. The system of claim 1, wherein the flocculation tank is provided with a coagulant aid adding inlet, a magnetic seed loading tank inlet and a flocculation tank outlet, the coagulant aid is added into the flocculation tank through the coagulant aid adding inlet, the magnetic seed loading tank inlet is connected with the magnetic seed loading tank outlet on the magnetic seed loading tank, and a vertical stirrer is arranged inside the flocculation tank.

6. The compact MBBR and ultra-efficient separation coupled deep denitrification and dephosphorization treatment system of claim 1, wherein the sedimentation tank is provided with a flocculation tank inlet, a sludge return outlet, a residual sludge outlet and a sedimentation tank outlet, and the flocculation tank inlet is connected with the flocculation tank outlet on the flocculation tank; the sedimentation tank is selected from one of a horizontal flow sedimentation tank, a vertical flow sedimentation tank, an inclined tube (plate) sedimentation tank and a radial flow sedimentation tank.

7. The system of claim 1, wherein the magnetic separation system comprises a high shear and a magnetic separator, the magnetic separation system is provided with a residual sludge inlet, a recovered magnetic seed outlet and a sludge discharge outlet, the residual sludge inlet of the magnetic separation system is connected with the residual sludge outlet on the sedimentation tank, the recovered magnetic seed outlet is connected with the recovered magnetic seed inlet, and the sludge is discharged from the system through the sludge discharge outlet.

8. The system of claim 1, wherein the magnetic species added in the magnetic species adding system comprises Fe as a main component₃O₄The particle size range is 40-200 mu m; flocculating agent added in the coagulant adding system is selected from PAC and FeSO₄、FeCl₂、Fe₂(SO₄)₃、FeCl₃One or more of polyferric sulfate (PFS), polyaluminum ferric chloride (PAFC), and polyaluminum ferric silicate (PSAF).

9. The system of claim 3, wherein the anoxic and aerobic MBBR tank and the aerobic MBBR tank are filled with suspension carriers, the filling rate of the suspension carriers in the anoxic MBBR tank is 15% -67%, and the membrane surface load is 0.4-2.8 gN/(m)²D); the filling rate of the suspension carrier in the aerobic pure membrane MBBR tank is 15 to 67 percent, and the membrane surface load is 0.4 to 1.2 gN/(m)²·d)。

10. The system of claim 9, wherein the suspension carrier is at least one of cylindrical, spherical and rectangular in shape, is made of at least one of HDPE, PE, PUR, PP and PU, and has a diameter or side length of 10-40 mm.