CN106007224A

CN106007224A - Denitrifying and dephosphorizing composite device and denitrifying and dephosphorizing method thereof

Info

Publication number: CN106007224A
Application number: CN201610561656.XA
Authority: CN
Inventors: 胡大苇
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-07-14
Filing date: 2016-07-14
Publication date: 2016-10-12
Anticipated expiration: 2036-07-14
Also published as: CN106007224B

Abstract

The invention discloses a denitrifying and dephosphorizing composite device and a denitrifying and dephosphorizing method thereof. The denitrifying and dephosphorizing composite device comprises a coagulating settling tank, a flow regulating tank, an anaerobic tank, an anoxic tank, a sequencing batch reaction tank, treated water tanks and nitrified solution transferring tanks, wherein the anaerobic tank is arranged inside the anoxic tank; the anoxic tank is arranged inside the sequencing batch reaction tank; the two ends of the anaerobic tank are open; the bottom end of the anaerobic tank is communicated with the lower part of the anoxic tank; the top end of the anoxic tank is open, and is communicated with the sequencing batch reaction tank through a sewage overflowing zone; and the nitrified solution transferring tanks are arranged at the upper part of the sequencing batch reaction tank. The denitrifying and dephosphorizing composite device is unique in design and small in occupied area; an anaerobic zone, an anoxic zone and an aerobic zone are communicated with one another, and water inletting, stirring and aeration are performed at regular intervals; during water inletting, a whole system switches among anaerobic treatment, anoxic treatment and aerobic treatment, and when water inletting stops, the anaerobic zone, the anoxic zone and the aerobic zone perform own microbial reactions, without mutual interference, so that forward dephosphorization and reverse denitrification of wastewater are performed circularly and steadily; therefore, the denitrifying and dephosphorizing composite device is low in running cost, and is suitable for popularization.

Description

A kind of denitrogenation dephosphorizing set composite and denitrification and dephosphorization method thereof

Technical field

The invention belongs to water-treatment technology field, be specifically a kind of denitrogenation dephosphorizing set composite and denitrification and dephosphorization method thereof.

Background technology

The severe contamination of water resource and scarcity are puzzlement current world economy, great international difficult problems for human survival, the eutrophication problem that the most unprocessed or the most appropriately processed discharge nitrogenous, phosphorus sewage is caused has arrived the most serious stage in China, and many water body in lake can not play its normal function and severely impact industrial or agricultural and fish production.

Controlling the key factor that the nitrogen and phosphorus content in water body is suppression body eutrophication, improve constantly denitrogenation dephosphorizing requirement in sewage disposal and cause sewage treatment process and operation thereof day by day to complicate, investment and the operating cost thereof of sewage disposal are more and more higher.Therefore, simplification of flowsheet, reduces construction investment and operating cost, is common issues being faced of countries in the world.Present stage various dephosphorization and denitrification process typically all de-carbon, denitrogenate, the organic assembling of three kinds of flow processs of dephosphorization, wherein extensively use for anaerobic-anoxic-oxic biological denitrification phosphorous removal technique (A2O).But this kind of technique there is also certain defect: anaerobic-aerobic reaction tank floor space is big, and sludge reflux amount is big, energy consumption is high；Realizing denitrogenation dephosphorizing by nitrification-denitrification process and remove in COD makes whole technique stream and need the sludge reflux of vast scale and Wind Volume aeration to ensure sludge concentration and oxygen-supplying amount, this makes the energy expenditure in technique increase；The long control condition of technological process is complicated；The a large amount of mud of system flowback, substantial amounts of nitrate can be taken back to anaerobic pond, and the condition of polyP bacteria release phosphorus is anaerobic state the existence having dissolubility BOD simultaneously, in the presence of a large amount of nitrate, denitrifying bacterium can carry out denitrification using Organic substance as carbon source, can start the anaerobism release of phosphorus after waiting denitrogenation completely, and the dischargeable capacity of this anaerobism release carrying out phosphorus in making anaerobic stages is greatly reduced, reducing the effect of dephosphorization, Comparatively speaking denitrification effect is preferable；Otherwise, if the Nitrification in aerobic section is poor, then the nitrate amount entered in anaerobism section with returned sludge just reduces, and makes phosphorus be able to the release of sufficient anaerobism, increases its phosphor-removing effect, but incomplete due to nitrification, cause denitrification effect the best.

In a word, in current biological denitrification phosphorous removal technique, mud is made up of nitrifier, denitrifying bacterium and polyP bacteria, in anaerobism section, circulate between anoxia section and aerobic section, owing to the optimum growh environment of different microorganisms is different, therefore often there is contradiction between biological denitrificaion and biological phosphate-eliminating, such as anaerobism varies in size with the distribution ratio of anoxia section section sludge quantity, contention carbon source, sludge age length is not equal, easily occurs that denitrogenation and dephosphorization are difficult to reach the situation of optimum efficiency simultaneously in actual sewage processing procedure.

Therefore, for solving the problems referred to above, need to design a kind of floor space little, denitrification dephosphorization apparatus that each stage is independent of each other and denitrification and dephosphorization method thereof.

Summary of the invention

First of present invention solution technical problem is that: provide a kind of denitrogenation dephosphorizing set composite, first of present invention solution technical problem is that: provide the denitrification and dephosphorization method of a kind of denitrogenation dephosphorizing set composite, the present invention can realize denitrogenation and dephosphorization simultaneously, and do not interfere with each other, can be with stable circulation, it is achieved low-cost high-efficiency runs.

nullFor solving first technical problem，The technical solution adopted in the present invention is: a kind of denitrogenation dephosphorizing set composite，Including coagulative precipitation tank、Flow-rate adjustment pond、Anaerobic pond、Anoxic pond、Batch-type reaction tank、Process pond、Nitrification solution transfer cell，Described Flow-rate adjustment pond is located between described coagulative precipitation tank and described anaerobic pond，By water inlet pipe, treatment sewage is imported in described anaerobic pond，Described anaerobic pond is inside described anoxic pond，Described anoxic pond is inside described batch-type reaction tank，Described anaerobic pond top and bottom are unlimited，The bottom of anaerobic pond is connected with the bottom of anoxic pond，The bottom of anoxic pond is provided with agitating device，Agitating device is connected with controller，The top of anoxic pond is also uncovered，Communicate with batch-type reaction tank above with sewage overflow district in anoxic pond，Described nitrification solution transfer cell is located at the top of batch-type reaction tank，Nitrification solution in batch-type reaction tank is imported anoxic pond by nitrification solution backflow pipe road by nitrification solution transfer cell，Described process pond is located at the outside of batch-type reaction tank，It is connected with batch-type reaction tank，Described process basin bottom connects sludge return pipe，By sludge reflux pump by mud back to anaerobic pond，It is provided with aerator I bottom described batch-type reaction tank，Aerator I is connected with bubble generator I by control valve I，Aerator II it is provided with bottom described anoxic pond，Aerator II is connected with bubble generator II by control valve II，It is provided with sludge discharging area bottom described batch-type reaction tank，And connect discharge pipeline.

For solving second technical problem, the technical solution adopted in the present invention is: the denitrification and dephosphorization method of a kind of denitrogenation dephosphorizing set composite, comprises the following steps:

Step one, sewage carries out coagulating kinetics through coagulative precipitation tank, removes part phosphorus, Organic substance and float, enters Flow-rate adjustment pond；

Step 2, the sewage in Flow-rate adjustment pond enters anaerobic pond by water inlet pipe, and agitating device carries out periodically at the uniform velocity stirring under the control of the controller；

Step 3, sewage toward dirty, flows into anoxic pond through anaerobic pond from the bottom of anaerobic pond, and sewage is past upper, until filling whole anoxic pond bottom anoxic pond；

Step 4, after sewage in anoxic pond has been expired, by in the sewage overflow district overflow on its top to batch-type reaction tank, aerator I bottom batch-type reaction tank is connected with bubble generator I by control valve I, carries out aeration by aerator I, gives batch-type reaction tank by sufficient oxygen under the control of control valve I, promote that nitrifier carries out Nitrification, ammoniacal nitrogen in sewage is changed into nitrate nitrogen, and meanwhile, polyP bacteria absorbs phosphorus under good oxygen condition in a large number；

Step 5, sewage entrance in batch-type reaction tank processes pond, after precipitation process, by the precipitation of bottom by sludge reflux pump by sludge return pipe back to anaerobic pond；

Step 6, enters anaerobic pond together with the mud that sludge return pipe leads back to and the sewage in Flow-rate adjustment pond are logical, and in anaerobic pond, polyP bacteria carries out the release of phosphorus；

Step 7, nitrification solution in batch-type reaction tank is transferred to anoxic pond by nitrification solution backflow pipe road by nitrification solution transfer cell, aerator II is connected with bubble generator II by control valve II, aeration is carried out by aerator II, a small amount of oxygen is provided to anoxic pond under the control of control valve II, denitrifying bacterium utilizes this nitrification solution to carry out Denitrification under anaerobic condition, nitrate nitrogen changes into nitrogen, and discharges；

Step 8, bottom batch-type reaction tank, is discharged the mud accumulated in sludge discharging area by discharge pipeline, and in promotion batch-type reaction tank, a large amount of of phosphorus are absorbed by Nitrification and the polyP bacteria of aerobic nitrification bacterium；

Step 9, finally eliminates the sewage of nitrogen and phosphorus and is processing pond precipitation process, the sewage processed, and supernatant can directly discharge, the precipitation of bottom by sludge reflux pump by sludge return pipe back to anaerobic pond, circulate and so forth.

Further, it is powdered polymeric aluminum chloride that described sewage carries out the coagulant used by coagulating kinetics through coagulative precipitation tank, powdered polymeric aluminum chloride granule is uniform, soluble in water, flocculating effect is good, purify efficient stable, adding less, low cost, being applicable to the source water of various turbidity, PH is applied widely.

Further, described Flow-rate adjustment pond controls water inlet 5～6 minutes, stops 80～90 minutes, intake again 5～10 minutes, stopping 50～60 minutes, so circulate, stability of flow during water inlet is 12.5～14.5L/h, during water inlet, system is in flow regime, after water inlet a period of time, stop water inlet, allow regional be in steady statue, carry out respective microbial reaction, and do not disturb mutually.

Further, described agitating device often stirs 3～5 minutes, stops 1～2 minute, mixing speed is 120～180r/min, periodically the most at the uniform velocity stirring is prevented from sludge settling in anaerobic pond, promotes the polyP bacteria in mud to discharge phosphorus under anaerobic state, makes polyP bacteria preponderate growth.

Further, described control valve I controls described aerator I and carries out intermittent aerating, every aeration 8～12 minutes, stops 3～6 minutes, provides sufficient oxygen for nitrifier and polyP bacteria, and promote the Nitrification of nitrifier and polyP bacteria absorbs phosphorus in a large number.

Further, described control valve II controls described aerator II and carries out intermittent aerating, every aeration 0.1～0.3 minute, stops 10～15 minutes, makes the oxygen content in anoxic pond be in relatively low state.

Compared with prior art, the invention has the beneficial effects as follows:

(1) apparatus of the present invention design uniqueness, floor space is little, anaerobic pond is in inside anoxic pond, and anoxic pond is in inside batch-type reaction tank, and anaerobic zone, anoxic zone and aerobic zone communicate, water inlet, stirring, aeration are all that regular intervals of time is carried out, during water inlet, whole system is in flow regime, carries out anaerobism, anoxia and aerobic switching, and when stopping water inlet, whole system remains static, in anaerobic zone, anoxic zone and aerobic zone carry out respective microbial reaction, do not interfere with each other；

(2) utilize sewage alternate run under anaerobism, anoxia, oxygen condition of becoming reconciled, carry out forward dephosphorization, reverse denitrogenation, it is achieved efficient denitrogenation and dephosphorization；

(3) apparatus of the present invention can be continued for denitrogenation and the dephosphorization of waste water, and forms a stable circulation, and operating cost is low, is suitable for large-scale promotion and uses.

Accompanying drawing explanation

Fig. 1 is the front view of the present invention；

Fig. 2 is the top view of the present invention；

Wherein, 1-coagulative precipitation tank, 2-Flow-rate adjustment pond, 3-anaerobic pond, 4-anoxic pond, 5-batch-type reaction tank, 6-process pond, 7-nitrification solution transfer cell, 8-nitrification solution backflow pipe road, 9-sewage overflow district, 10-water inlet pipe, 11-agitating device, 12-controller, 13-aerator I, 14-bubble generator I, 15-control valve I, 16-aerator II, 17-bubble generator II, 18-control valve II, 19-sludge reflux pump, 20-sludge return pipe, 21-sludge discharging area, 22-discharge pipeline.

Detailed description of the invention

Below in conjunction with detailed description of the invention, the present invention is described in detail.

Embodiment 1:

nullA kind of denitrogenation dephosphorizing set composite，Including coagulative precipitation tank 1、Flow-rate adjustment pond 2、Anaerobic pond 3、Anoxic pond 4、Batch-type reaction tank 5、Process pond 6、Nitrification solution transfer cell 7，Flow-rate adjustment pond 2 is located between coagulative precipitation tank 1 and anaerobic pond 3，By water inlet pipe 10, treatment sewage is imported in anaerobic pond 3，It is internal that anaerobic pond 3 is located at anoxic pond 4，It is internal that anoxic pond 4 is located at batch-type reaction tank 5，Anaerobic pond 3 top and bottom are unlimited，The bottom of anaerobic pond 3 is connected with the bottom of anoxic pond 4，The bottom of anoxic pond 4 is provided with agitating device 11，Agitating device 11 is connected with controller 12，The top of anoxic pond 4 is also uncovered，Communicate with batch-type reaction tank 5 above with sewage overflow district 9 in anoxic pond 4，Nitrification solution transfer cell 7 is located at the top of batch-type reaction tank 5，Nitrification solution in batch-type reaction tank 5 is imported anoxic pond 4 by nitrification solution backflow pipe road 8 by nitrification solution transfer cell 7，Process pond 6 and be located at the outside of batch-type reaction tank 5，It is connected with batch-type reaction tank 5，Process and bottom pond 6, connect sludge return pipe 20，By sludge reflux pump 19 by mud back to anaerobic pond 3，Aerator I 13 it is provided with bottom batch-type reaction tank 5，Aerator I 13 is connected with bubble generator I 14 by control valve I 15，Aerator II 16 it is provided with bottom anoxic pond 4，Aerator II 16 is connected with bubble generator II 17 by control valve II 18，Sludge discharging area 21 it is provided with bottom batch-type reaction tank 5，And connect discharge pipeline 22.

The denitrification and dephosphorization method of a kind of denitrogenation dephosphorizing set composite, comprises the following steps:

Step one, sewage carries out coagulating kinetics through coagulative precipitation tank 1, coagulant used is powdered polymeric aluminum chloride, remove part phosphorus, Organic substance and float, powdered polymeric aluminum chloride granule is uniform, soluble in water, flocculating effect is good, purify efficient stable, adding less, low cost, being applicable to the source water of various turbidity, PH is applied widely；Sewage after process enters Flow-rate adjustment pond 2, and Flow-rate adjustment pond 2 controls water inlet 5 minutes, stops 80 minutes, intake again 5 minutes, stopping 50 clocks, so circulate, stability of flow during water inlet is at 12.5L/h, during water inlet, system is in flow regime, after water inlet a period of time, stop water inlet, allow regional be in steady statue, carry out respective microbial reaction, and do not disturb mutually；

Step 2, sewage in Flow-rate adjustment pond 2 enters anaerobic pond 3 by water inlet pipe 10, agitating device 11 carries out periodically at the uniform velocity stirring under the control of the controller 12, agitating device 11 often stirs 3 minutes, stopping 1 minute, mixing speed is 120r/min, and the most at the uniform velocity stirring is prevented from sludge settling in anaerobic pond, promote the polyP bacteria in mud to discharge phosphorus under anaerobic state, make polyP bacteria preponderate growth；

Step 3, sewage toward dirty, flows into anoxic pond 4 through anaerobic pond 3 from the bottom of anaerobic pond 3, and sewage is past upper, until filling whole anoxic pond 4 bottom anoxic pond 4；

Step 4, after sewage in anoxic pond 4 has been expired, by in sewage overflow district 9 overflow on its top to batch-type reaction tank 5, aerator I 13 bottom batch-type reaction tank 5 is connected with bubble generator I 14 by control valve I 15, aeration is carried out by aerator I 13, control valve I 15 controls described aerator I 13 and carries out intermittent aerating, every aeration 8 minutes, stop 3 minutes, sufficient oxygen is provided for nitrifier and polyP bacteria, promote that nitrifier carries out Nitrification, ammoniacal nitrogen in sewage is changed into nitrate nitrogen, simultaneously, polyP bacteria absorbs phosphorus under good oxygen condition in a large number；

Step 5, sewage entrance in batch-type reaction tank 5 processes pond 6, after precipitation process, by the precipitation of bottom by sludge reflux pump 19 by sludge return pipe 20 back to anaerobic pond 3；

Step 6, enters anaerobic pond 3 together with the mud that sludge return pipe 20 leads back to and the sewage in Flow-rate adjustment pond 2 are logical, and in anaerobic pond 3, polyP bacteria carries out the release of phosphorus；

Step 7, nitrification solution in batch-type reaction tank 5 is transferred to anoxic pond 4 by nitrification solution backflow pipe road 8 by nitrification solution transfer cell 7, aerator II 16 is connected with bubble generator II 17 by control valve II 18, aeration is carried out by aerator II 16, control valve II 18 controls described aerator II 16 and carries out intermittent aerating, every aeration 0.1 minute, stop 10 minutes, the oxygen content in anoxic pond is made to be in relatively low state, denitrifying bacterium utilizes this nitrification solution to carry out Denitrification under anaerobic condition, nitrate nitrogen is changed into nitrogen, and discharges；

Step 8, bottom batch-type reaction tank 5, is discharged the mud of interior for sludge discharging area 21 accumulation by discharge pipeline 22, and in promotion batch-type reaction tank 5, a large amount of of phosphorus are absorbed by Nitrification and the polyP bacteria of aerobic nitrification bacterium；

Step 9, finally eliminates the sewage of nitrogen and phosphorus and is processing pond 6 precipitation process, the sewage processed, and supernatant can directly discharge, the precipitation of bottom by sludge reflux pump 19 by sludge return pipe 20 back to anaerobic pond 3, circulate and so forth.

Embodiment 2:

Step one, sewage carries out coagulating kinetics through coagulative precipitation tank 1, coagulant used is powdered polymeric aluminum chloride, remove part phosphorus, Organic substance and float, powdered polymeric aluminum chloride granule is uniform, soluble in water, flocculating effect is good, purify efficient stable, adding less, low cost, being applicable to the source water of various turbidity, PH is applied widely；Sewage after process enters Flow-rate adjustment pond 2, and Flow-rate adjustment pond 2 controls water inlet 5.5 minutes, stops 85 minutes, intake again 7.5 minutes, stopping 55 minutes, so circulate, stability of flow during water inlet is at 13.5L/h, during water inlet, system is in flow regime, after water inlet a period of time, stop water inlet, allow regional be in steady statue, carry out respective microbial reaction, and do not disturb mutually；

Step 2, sewage in Flow-rate adjustment pond 2 enters anaerobic pond 3 by water inlet pipe 10, agitating device 11 carries out periodically at the uniform velocity stirring under the control of the controller 12, agitating device 11 often stirs 4 minutes, stopping 1.5 minutes, mixing speed is 150r/min, and the most at the uniform velocity stirring is prevented from sludge settling in anaerobic pond, promote the polyP bacteria in mud to discharge phosphorus under anaerobic state, make polyP bacteria preponderate growth；

Step 4, after sewage in anoxic pond 4 has been expired, by in sewage overflow district 9 overflow on its top to batch-type reaction tank 5, aerator I 13 bottom batch-type reaction tank 5 is connected with bubble generator I 14 by control valve I 15, aeration is carried out by aerator I 13, control valve I 15 controls described aerator I 13 and carries out intermittent aerating, every aeration 10 minutes, stop 4.5 minutes, sufficient oxygen is provided for nitrifier and polyP bacteria, promote that nitrifier carries out Nitrification, ammoniacal nitrogen in sewage is changed into nitrate nitrogen, simultaneously, polyP bacteria absorbs phosphorus under good oxygen condition in a large number；

Step 7, nitrification solution in batch-type reaction tank 5 is transferred to anoxic pond 4 by nitrification solution backflow pipe road 8 by nitrification solution transfer cell 7, aerator II 16 is connected with bubble generator II 17 by control valve II 18, aeration is carried out by aerator II 16, control valve II 18 controls described aerator II 16 and carries out intermittent aerating, every aeration 0.12 minute, stop 12.5 minutes, the oxygen content in anoxic pond is made to be in relatively low state, denitrifying bacterium utilizes this nitrification solution to carry out Denitrification under anaerobic condition, nitrate nitrogen is changed into nitrogen, and discharges；

Embodiment 3:

Step one, sewage carries out coagulating kinetics through coagulative precipitation tank 1, coagulant used is powdered polymeric aluminum chloride, remove part phosphorus, Organic substance and float, powdered polymeric aluminum chloride granule is uniform, soluble in water, flocculating effect is good, purify efficient stable, adding less, low cost, being applicable to the source water of various turbidity, PH is applied widely；Sewage after process enters Flow-rate adjustment pond 2, and Flow-rate adjustment pond 2 controls water inlet 6 minutes, stops 90 minutes, intake again 10 minutes, stopping 60 minutes, so circulate, stability of flow during water inlet is at 14.5L/h, during water inlet, system is in flow regime, after water inlet a period of time, stop water inlet, allow regional be in steady statue, carry out respective microbial reaction, and do not disturb mutually；

Step 2, sewage in Flow-rate adjustment pond 2 enters anaerobic pond 3 by water inlet pipe 10, agitating device 11 carries out periodically at the uniform velocity stirring under the control of the controller 12, agitating device 11 often stirs 5 minutes, stopping 2 minutes, mixing speed is 180r/min, and the most at the uniform velocity stirring is prevented from sludge settling in anaerobic pond, promote the polyP bacteria in mud to discharge phosphorus under anaerobic state, make polyP bacteria preponderate growth；

Step 4, after sewage in anoxic pond 4 has been expired, by in sewage overflow district 9 overflow on its top to batch-type reaction tank 5, aerator I 13 bottom batch-type reaction tank 5 is connected with bubble generator I 14 by control valve I 15, aeration is carried out by aerator I 13, control valve I 15 controls described aerator I 13 and carries out intermittent aerating, every aeration 12 minutes, stop 6 minutes, sufficient oxygen is provided for nitrifier and polyP bacteria, promote that nitrifier carries out Nitrification, ammoniacal nitrogen in sewage is changed into nitrate nitrogen, simultaneously, polyP bacteria absorbs phosphorus under good oxygen condition in a large number；

Step 7, nitrification solution in batch-type reaction tank 5 is transferred to anoxic pond 4 by nitrification solution backflow pipe road 8 by nitrification solution transfer cell 7, aerator II 16 is connected with bubble generator II 17 by control valve II 18, aeration is carried out by aerator II 16, control valve II 18 controls described aerator II 16 and carries out intermittent aerating, every aeration 0.3 minute, stop 15 minutes, the oxygen content in anoxic pond is made to be in relatively low state, denitrifying bacterium utilizes this nitrification solution to carry out Denitrification under anaerobic condition, nitrate nitrogen is changed into nitrogen, and discharges；

Apparatus of the present invention design uniqueness, floor space is little, anaerobic pond is in inside anoxic pond, and anoxic pond is in inside batch-type reaction tank, and anaerobic zone, anoxic zone and aerobic zone communicate, water inlet, stirring, aeration are all that regular intervals of time is carried out, during water inlet, whole system is in flow regime, carries out anaerobism, anoxia and aerobic switching, and when stopping water inlet, whole system remains static, in anaerobic zone, anoxic zone and aerobic zone carry out respective microbial reaction, do not interfere with each other；Utilize sewage alternate run under anaerobism, anoxia, oxygen condition of becoming reconciled, carry out forward dephosphorization, reverse denitrogenation, it is achieved efficient denitrogenation and dephosphorization；Can be continued for denitrogenation and the dephosphorization of waste water, and form a stable circulation, operating cost is low, is suitable for large-scale promotion and uses.

Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in previous embodiment still can be modified by it, or wherein portion of techniques feature is carried out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of embodiment of the present invention technical scheme.

Claims

1. a denitrogenation dephosphorizing set composite, it is characterised in that include coagulative precipitation tank (1), Flow-rate adjustment pond (2), anaerobic pond (3), anoxic pond (4), batch-type reaction tank (5), process pond (6), nitre Changing solution transfer cell (7), described Flow-rate adjustment pond (2) is located at described coagulative precipitation tank (1) and detests with described Between oxygen pond (3), by water inlet pipe (10), treatment sewage is imported in described anaerobic pond (3), Described anaerobic pond (3) is internal in described anoxic pond (4), and described anoxic pond (4) is reacted at described batch-type Pond (5) is internal, and described anaerobic pond (3) top and bottom are unlimited, and the bottom of anaerobic pond (3) is with scarce The bottom in oxygen pond (4) is connected, and the bottom of anoxic pond (4) is provided with agitating device (11), agitating device (11) being connected with controller (12), the top of anoxic pond (4) is also uncovered, in anoxic pond (4) Communicate with batch-type reaction tank (5) above with sewage overflow district (9), described nitrification solution transfer cell (7) being located at the top of batch-type reaction tank (5), nitrification solution transfer cell (7) is refluxed by nitrification solution Nitrification solution in batch-type reaction tank (5) is imported anoxic pond (4), described process pond by pipeline (8) (6) it is located at the outside of batch-type reaction tank (5), is connected with batch-type reaction tank (5), described process water Bottom, pond (6) connects sludge return pipe (20), by sludge reflux pump (19) by mud back to detesting Oxygen pond (3), described batch-type reaction tank (5) bottom is provided with aerator I (13), aerator I (13) it is connected with bubble generator I (14) by control valve I (15), described anoxic pond (4) end Portion is provided with aerator II (16), and by control valve II, (18 fill aerator II (16) with bubble Putting II (17) to be connected, described batch-type reaction tank (5) bottom is provided with sludge discharging area (21), and connects spoil disposal Pipe (22).

The denitrification and dephosphorization method of a kind of denitrogenation dephosphorizing set composite the most as claimed in claim 1, its feature exists In comprising the following steps:

Step one, sewage carries out coagulating kinetics through coagulative precipitation tank (1), removes part phosphorus, organic Thing and float, enter flow and adjust pond (2)；

Step 2, the sewage in Flow-rate adjustment pond (2) enters anaerobic pond (3) by water inlet pipe (10), Agitating device (11) carries out periodically at the uniform velocity stirring under the control of controller (12)；

Step 3, sewage toward dirty, flows into anoxic pond through anaerobic pond (3) from the bottom of anaerobic pond (3) (4), sewage is past upper in anoxic pond (4) bottom, until filling whole anoxic pond (4)；

Step 4, after the sewage in anoxic pond (4) has been expired, by the sewage overflow district (9) on its top Overflow is interior to batch-type reaction tank (5), and the aerator I (13) of batch-type reaction tank (5) bottom leads to Cross control valve I (15) to be connected with bubble generator I (14), carried out by aerator I (13) Aeration, to batch-type reaction tank (5) by sufficient oxygen under the control of control valve I (15), promotes Nitrifier carries out Nitrification, and the ammoniacal nitrogen in sewage is changed into nitrate nitrogen, and meanwhile, polyP bacteria is aerobic Phosphorus is absorbed in a large number under state；

Step 5, the sewage entrance in batch-type reaction tank (5) processes pond (6), through precipitation process After, by the precipitation of bottom by sludge reflux pump (19) by sludge return pipe (20) back to anaerobic pond (3)；

Step 6, the mud that sludge return pipe (20) leads back to leads to the sewage in Flow-rate adjustment pond (2) Entering anaerobic pond (3) together, in anaerobic pond (3), polyP bacteria carries out the release of phosphorus；

Step 7, batch-type is reacted by nitrification solution transfer cell (7) by nitrification solution backflow pipe road (8) Nitrification solution in pond (5) transfers to anoxic pond (4), and aerator II (16) is by control valve II (18) it is connected with bubble generator II (17), carries out aeration by aerator II (16), in control Thering is provided a small amount of oxygen to anoxic pond (4) under the control of valve II (18) processed, denitrifying bacterium is profit under anaerobic condition Carry out Denitrification with this nitrification solution, nitrate nitrogen is changed into nitrogen, and discharges.

Step 8, in batch-type reaction tank (5) bottom, by discharge pipeline (22) by sludge discharging area (21) The mud of accumulation is discharged, and promotes Nitrification and the polyP bacteria of batch-type reaction tank (5) interior aerobic nitrification bacterium A large amount of absorptions to phosphorus.

Step 9, the sewage finally eliminating nitrogen and phosphorus is processing pond (6) precipitation process, the dirt processed Water, supernatant can directly discharge, the precipitation of bottom by sludge reflux pump (19) by sludge return pipe (20) back to anaerobic pond (3), circulate and so forth.

The denitrification and dephosphorization method of a kind of denitrogenation dephosphorizing set composite the most as claimed in claim 2, its feature exists In: it is polymerization chlorine that described sewage carries out the coagulant used by coagulating kinetics through coagulative precipitation tank (1) Change aluminum.

The denitrification and dephosphorization method of a kind of denitrogenation dephosphorizing set composite the most as claimed in claim 2, its feature exists In: described Flow-rate adjustment pond (2) controls water inlet 5～6 minutes, stops 80～90 minutes, then intake 5～ 10 minutes, stopping 50～60 minutes, so circulate, stability of flow during water inlet is 12.5～14.5L/h.

The denitrification and dephosphorization method of a kind of denitrogenation dephosphorizing set composite the most as claimed in claim 2, its feature exists In: described agitating device (11) often stirs 3～5 minutes, stops 1～2 point, mixing speed be 120～ 180r/min。

The denitrification and dephosphorization method of a kind of denitrogenation dephosphorizing set composite the most as claimed in claim 2, its feature exists In: described control valve I (15) controls described aerator I (13) and carries out intermittent aerating, every aeration 8～12 minutes, stop 3～6 minutes.

The denitrification and dephosphorization method of a kind of denitrogenation dephosphorizing set composite the most as claimed in claim 2, its feature exists In: described control valve II (18) controls described aerator II (16) and carries out intermittent aerating, every aeration 0.1～0.3 minute, stop 10～15 minutes.