CN110386732A

CN110386732A - A kind of mainstream autotrophic denitrification modernization system and remodeling method based on MBBR

Info

Publication number: CN110386732A
Application number: CN201910714865.7A
Authority: CN
Inventors: 吴迪; 韩文杰; 管勇杰; 周家中
Original assignee: Qingdao Si Purun Water Treatment Limited-Liability Co
Current assignee: Qingdao Sipurun Intelligent System Co ltd; Qingdao Sipurun Water Environmental Technology Co ltd; Qingdao Spring Water Treatment Co ltd
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2019-10-29
Anticipated expiration: 2039-08-05
Also published as: CN110386732B

Abstract

The invention discloses a kind of mainstream autotrophic denitrification modernization system and remodeling method based on MBBR, belong to technical field of sewage biological denitrification.Which solve transformation is complicated in the prior art, load is low, fluctuation of service, is discharged the technical problems such as not up to standard.It can be transformed by the technique original pond AAO, transformation includes flow direction and function zoning between pond body, it include two groups of denitrification systems after transformation, single group denitrification system includes anaerobic pond, anoxic pond, aerobic decarburization pond, first autotrophic denitrification pond, second autotrophic denitrification pond, aerobic nitrification pond, deaerate pond, sedimentation basin, aerobic decarburization pond outlet pipeline, autotrophic denitrification pond inlet pipeline, sludge reflux pipeline, nitrification liquid return line and tail water reflux unit, water inlet can be changed to high ammonia-nitrogen wastewater by mainstream sewage in short-term according to denitrification system treatment effect by the present invention, it is jointly processed by by two groups of denitrification systems, realize the processing of mainstream sewage stability and high efficiency, effluent quality index up to class Table IV class water quality standard.

Description

A kind of mainstream autotrophic denitrification modernization system and remodeling method based on MBBR

Technical field

The present invention relates to technical field of sewage biological denitrification, and in particular to a kind of mainstream autotrophic denitrification transformation based on MBBR System and remodeling method.

Background technique

Autotrophic denitrification technological development has become so far can solve high-carbon nitrogen than city mainstream wastewater efficient biological denitrificaion New route.Though, there are still more problem, what is faced is main currently, mainstream sewage autotrophic denitrification technology achieves certain achievement Bottleneck is the stable operation of system.Firstly, since autotrophic denitrification functional microorganism AOB and AnAOB are required to ammonia nitrogen as generation Thank to matrix, therefore the two abundance has obvious correlation with influent ammonium concentration, and the low ammonia nitrogen that city mainstream sewage is representative gives up Water, the substrate concentration due to ensureing AOB and AnAOB growth metabolism is lower, is unfavorable for the stable operation of one-step autotrophic nitrogen removal system, Bacterial activity degeneration easily occur causes treatment effect to decline.Secondly, with the reduction of influent ammonium concentration, so that FA presses down NOB System reduces, and then easily leads to system NOB activation recovering, destroys system short distance nitration effect.Again, contained by city mainstream sewage Machine object is higher, easily leads to denitrifying bacterium breeding directly as system water inlet, competes matrix with the AnAOB in autotrophic denitrification microorganism And then eliminate AnAOB.Finally, due to which the technique generallys use activated sludge form at present carries out autotrophic denitrification, in process flow On, secondary settling tank land occupation is increased, on treatment effect, activated sludge, which is easily lost with water outlet, causes system process performance unstable. Therefore, numerous deficiencies limit autotrophic denitrification technique in the application of processing mainstream field of sewage.Although currently, there is minority about master The technological design for flowing sewage autotrophic denitrification, it is contemplated that system need to maintain to run steadily in the long term, current many techniques there are still More defect.

AAO technique has been used widely since exploitation due to having both denitrification and dephosphorization characteristics, it has also become activated sludge process Representative technique, pond body simple structure, operation is convenient, guarantees that enough residence times can reach preferable treatment effect.But It is, as the denitrification process based on activated sludge process, equally there are shortcomings, firstly, its denitrogenation principle is tradition nitrification Denitrification, therefore need to consume a large amount of carbon sources in carrying out mainstream sewage disposal process, and using carbon in conventional mainstream sewage Source is often insufficient, needs additionally to add, to cause overspending, in addition, due to AAO based on traditional activated sludge process denitrogenation Flora (nitrifying bacteria community) is generally long sludge age bacterium (15-25d), and dephosphorization flora (polyP bacteria) is generally short sludge age bacterium (3- 7d), therefore, practical traditional denitrification dephosphorization technique cannot be considered in terms for the treatment of effect there are implacable contradiction on sludge age.And Autotrophic denitrification advantage is numerous, has and saves 60% aeration quantity, without adding organic carbon source, the sludge yield of reduction by 90% and phase The advantages that less nitrogen oxides burst size.Therefore, directly by traditional AAO technological transformation be autotrophic denitrification technique to handle mainstream Sewage has realistic feasibility.

Autotrophic denitrification is transform as by traditional biological denitrogenation about mainstream sewage treatment project project, since two kinds of techniques are de- There are essential distinctions in nitrogen principle, therefore face more transformation problem, this is also work of the autotrophic denitrification in mainstream sewage treatment Journey application causes certain obstruction.

The research report of prior art related fields mainly has:

109502906 A of CN disclose a kind of municipal sewage main side stream Anammox collaboration denitrification process device and its Application method, including municipal sewage raw water box, biological reaction pool and secondary settling tank, sludge digestive fluid original water tank and sludge-digestion liquid AOB strengthens pond；Municipal sewage raw water box is connected by the intake pump of biological reaction pool with the inlet valve of biological reaction pool；Biology Reaction tank is connect by secondary settling tank connecting tube with secondary settling tank；The water inlet that sludge digestive fluid original water tank passes through sludge digestive fluid original water tank Pump is connected with digestive juice raw water box outlet valve；It is mixed by mud mixture return pipe and muddy water that sludge-digestion liquid AOB strengthens pond Object reflux pump is closed to connect with biological reaction pool Anammox area cell compartment.Its biological reaction pool Anammox compartment uses autotrophy Denitrogenation, strain in form to fix the biomembrane combined sewage factory activated sludge grown on filler, the form using fixed bed as Autotrophic denitrification functional microorganism adheres to carrier, lacks enough hydraulic shears biomembrane easily occurs and thicken, so as to cause mass transfer by Limit, and then influence processing load；Secondly, ordinary activated sludge is followed repeatedly through the anaerobism in process flow, anoxic, aerobic environment Ring, microbial diversity is high, and flowing into Anammox compartment easily causes system unstable, destroys Anammox reaction. Again, it uses effluent sewage to strengthen pond culture enrichment AOB in AOB and flows into Anammox compartment to guarantee autotrophic denitrification, This, which runs, only can guarantee the enrichment of AOB in autotrophic denitrification functional microorganism, and for main denitrification functions microorganism AnAOB, Bacterium colony degeneration easily occurs in long-term low ammonia nitrogen mainstream sewage operational process causes treatment effect to decline, and the invention is not to this Any preventive measure is made, therefore treatment effect is unable to get guarantee in During Process of Long-term Operation.

104334500 A of CN discloses a kind of utilization ammonia oxidizing bacteria (AOB) and Anammox (ANAMMOX) bacterium The method for removing the ammonia from waste water stream.Include anaeroic digestor, dewatering system and biofilm reactor effluent in, to from The sludge of waste water separation in mainstream is handled.Anaeroic digestor generate digested sludge, it is dehydrated, generate comprising compared with The sewage of high ammonia density and lower organic concentration of carbon and higher temperature.In the anti-ammonification of effluent including biofilm carrier The sewage is handled in biofilm reactor, wherein the biofilm carrier is inoculated with the AOB for effectively removing the ammonia from sewage And AnAOB.In order to remove the ammonia of the waste water in mainstream, AOB and AnAOB on medium carrier are used to contact useless in mainstream Water simultaneously removes ammonia therein.Condition in mainstream causes AOB and AnAOB to cannot be removed effectively ammonia after a certain time period.For The AOB and AnAOB on biofilm carrier are restored, AOB and AnAOB is made to contact the sewage in effluent biofilm reactor again, Condition therein is conducive to the growth and breeding of AOB and AnAOB.The invention only has mainstream sewage water denitrification from process form Ability, and any removal technique is not directed to for phosphorus element contained by sewage；Secondly, operationally, which predicts in mainstream Condition leads to AOB and AnAOB cannot be removed effectively ammonia after a certain time period, but is strengthening it using effluent digestive juice Easily causing when except effect cannot be effectively treated into mainstream sewage in water, and then cause to be discharged exceeded；Again, in entire technique not See that mixed liquor flows back, it is excessively high to easily lead to out water-based, it is difficult to reach relevant emission standards.

CN101805094A discloses a kind of starting method of single-stage self-supported denitrification reactor, the steps include: limiting first Under conditions of property oxygen supply processed and a small amount of organic carbon source, building is leading microflora with nitrite bacteria and nitrifier, so Afterwards by restricted oxygen supply, ammonium oxidation is controlled to nitrous acid phase and inhibits the growth of nitrifier to be enriched with nitrite bacteria, Establishing with nitrite bacteria is leading microflora, in stable nitrous acid system-based, by adjusting aeration mode And control dissolved oxygen levels, optimize the microenvironment that nitrite bacteria and anaerobic ammonia oxidizing bacteria coexist, promotes anaerobic ammonia oxidizing bacteria Growth and enrichment, successfully start up one-step autotrophic nitrogen removal system.System start method involved in the invention is relatively complicated, and exists Longtime running is likely to occur the case where autotrophic denitrification functional microorganism is degenerated.

Summary of the invention

The purpose of the present invention is to provide a kind of mainstream autotrophic denitrification modernization system and remodeling method based on MBBR, energy Enough ensure that the core index of sewage is all up to standard.

One of task of the invention is to provide a kind of mainstream autotrophic denitrification modernization system based on MBBR, which employs with Lower technical solution:

A kind of mainstream autotrophic denitrification modernization system based on MBBR comprising two groups of identical first denitrification systems and Second denitrification system, wherein the first denitrification system/second denitrification system include reaction tank, tail water reflux unit, agitating device and Related process pipeline, the reaction tank include anaerobic pond successively arranged side by side, anoxic pond, aerobic decarburization pond, the first autotrophy Denitrification tank, the second autotrophic denitrification pond, aerobic nitrification pond, degassing pond, sedimentation basin；

The related process pipeline includes aerobic decarburization pond outlet pipeline, the first autotrophic denitrification pond inlet pipeline, sludge Return line and nitrification liquid return line；

Common sludge sewage is inoculated in the anaerobic pond, anoxic pond, aerobic decarburization pond；

Suspending carrier has been added in pond in the first autotrophic denitrification pond, the second autotrophic denitrification pond, aerobic nitrification；

It is provided with aeration tube in the aerobic decarburization pond and aerobic nitrification pond bottom of pond, in first autotrophic denitrification Pond, the second autotrophic denitrification pond bottom of pond are provided with micropore aeration pipe and boring aeration pipe；

The anaerobic pond is connected with water inlet manifold road, and the degassing pond is connected with total outlet pipe road；

The bottom of the sedimentation basin is provided with mud discharging pipe；

The aerobic decarburization pond outlet pipeline is used to connect the aerobic decarburization pond and the sedimentation basin, is located at The one end in oxygen decarburization pond is as water inlet, and one end positioned at sedimentation basin is as water outlet；

The first autotrophic denitrification pond inlet pipeline is used to connect the sedimentation basin and first autotrophic denitrification Pond, positioned at one end of sedimentation basin as water inlet, one end positioned at the first autotrophic denitrification pond is as water outlet；

The sludge pipeline is used to connect the sedimentation basin and the anaerobic pond, positioned at one end conduct of sedimentation basin Mud inlet is provided with sludge reflux pump on the sludge return pipe positioned at one end of anaerobic pond as mud mouth；

The nitrification liquid return line is used to connect the degassing pond and the anoxic pond, positioned at the one of degassing pond End is used as water inlet, is used as water outlet positioned at one end of anoxic pond, nitrification liquid time is provided on the nitrification liquid reflux line Stream pump；

The tail water reflux unit include tail water reflux pump and for connect degassing pond and another group of reaction tank first The tail water reflux line in autotrophic denitrification pond, one end positioned at degassing pond are located at another group of the first autotrophy of reaction tank as water inlet One end of denitrification tank is as water outlet；

The agitating device is for being stirred activated sludge.

As a preferred solution of the present invention, above-mentioned agitating device include be located at the anaerobic pond, anoxic pond, The first blender, the second blender in aerobic decarburization pond；Sludge reflux flow is additionally provided on above-mentioned sludge return pipe It counts, is additionally provided with nitrification liquid return flow meter on above-mentioned nitrification liquid reflux line.

As another preferred embodiment of the invention, between above-mentioned anaerobic pond and anoxic pond, anoxic pond and aerobic de- Between carbon pond, between the first autotrophic denitrification pond and the second autotrophic denitrification pond, between the second autotrophic denitrification pond and aerobic nitrification pond, it is good Separated by partition between oxygen nitrification tank and degassing pond, the mistake for keeping the connection of adjacent reaction pond is provided on above-mentioned partition The mouth of a river, it is above-mentioned cross the mouth of a river include the anaerobic pond on anaerobic pond and the spacing board of anoxic pond cross the mouth of a river, be located at anoxic pond with The spacing board that anoxic pond on the spacing board in aerobic decarburization pond crosses the mouth of a river, is located at the first autotrophic denitrification pond and the second autotrophic denitrification pond On to cross the mouth of a river, the second autotrophy on the spacing board in the second autotrophic denitrification pond and aerobic nitrification pond de- in the first autotrophic denitrification pond Nitrogen pond crosses the mouth of a river and the aerobic nitrification pond on the spacing board in aerobic nitrification pond and degassing pond and crosses the mouth of a river.

Further, the front at the mouth of a river is crossed in the first above-mentioned autotrophic denitrification pond, water is crossed in the second above-mentioned autotrophic denitrification pond Mouth has been respectively arranged in front with the first interception sieve, the second interception sieve；Above-mentioned first intercept sieve, second intercept sieve its Upper edge 30cm below operating water level, lower edge are higher than the half of operating water level, above-mentioned operating water level, with above-mentioned total water outlet Pipeline it is lower identical along mounting height；It is crossed in front of the mouth of a river in above-mentioned aerobic nitrification pond and is provided with third interception sieve, it is above-mentioned Third intercept sieve upper edge operating water level 65% hereinafter, lower edge be higher than operating water level 35%, above-mentioned operation water Position, it is lower identical along mounting height with above-mentioned total outlet pipe road.

Further, above-mentioned suspending vehicle density is 0.97-0.99g/cm³, voidage > 90%, suspending carrier is effective Specific surface area is 620-1200m²/m³。

Further, above-mentioned aeration tube, boring aeration pipe opening direction downward, hatch bore diameter 4-6mm, installation is high Degree is located at the above 30cm of respective bottom of pond, and above-mentioned micropore aeration pipe is aerated by microporous aeration disc or micro porous aeration head, aeration plate Or aeration head opening upwards, the mounting height of above-mentioned micropore aeration pipe are higher by above-mentioned boring aeration pipe 10-20cm.

Another task of the invention is to provide a kind of operation of above-mentioned mainstream autotrophic denitrification modernization system based on MBBR Mode, which is characterized in that it includes two kinds of operational modes:

The first, mainstream sewage mode；Influent ammonia nitrogen < 150mg/L, it is 1.5-2.0mg/L that the first autotrophic denitrification pond, which controls DO, It is 1.0-1.5mg/L that second autotrophic denitrification pond, which controls DO, and it is 2-6mg/L that aerobic nitrification pond, which controls DO, and the first autotrophic denitrification pond is extremely It is 0.1-0.3kgN/m that aerobic nitrification pond TN, which removes volumetric loading,³/d；

The second, high ammonia-nitrogen wastewater mode；Influent ammonia nitrogen > 150mg/L, it is 2.0-3.0mg/ that the first autotrophic denitrification pond, which controls DO, L, it is 1.5-2.0mg/L that the second autotrophic denitrification pond, which controls DO, and it is 4-8mg/L, the first autotrophic denitrification pond that aerobic nitrification pond, which controls DO, To 2-4 times that aerobic nitrification tank TN removal volumetric loading is sewage mode.

Another task of the invention is to provide a kind of operation method of mainstream autotrophic denitrification modernization system based on MBBR, Operation method successively the following steps are included:

A, each reaction tank is all made of mainstream sewage mode operation, the mainstream sewage mode are as follows: influent ammonia nitrogen < 150mg/ L, it is 1.5-2.0mg/L that the first autotrophic denitrification pond, which controls DO, and it is 1.0-1.5mg/L, aerobic nitre that the second autotrophic denitrification pond, which controls DO, Changing pond control DO is 2-6mg/L, and the first autotrophic denitrification pond to aerobic nitrification tank TN removal volumetric loading is 0.1-0.3kgN/m³/ d；Mainstream sewage to be processed is synchronized through water inlet manifold road first to be entered in the anaerobic pond of the first denitrification system and the second denitrification system, The activated sludge of each group sedimentation basin reflux carries out anaerobic phosphorus release using dirty Organic substance in water；Anaerobic pond ORP < -400mV；Anaerobic pond Hydraulic detention time is in 45-90min；

B, each group anaerobic pond water outlet respectively enters respective anoxic pond, is completed by the denitrifying bacteria grown in activated sludge To the nitrate removal that reflux nitrification liquid carries, while consuming raw water partial organic substances；Anoxic pond ORP < -50mv, DO < 0.4mg/L；

C, the water outlet of each group anoxic pond respectively enters respective aerobic decarburization pond, completes raw water by the heterotroph in activated sludge The removal of organic matter；Aerobic decarburization pond DO > 1mg/L；

D, the aerobic decarburization pond water outlet of each group respectively enters respective sedimentation basin through aerobic decarburization pond outlet pipeline, completes muddy water point From the sludge after sedimentation is back to respective anaerobic pond by mud return line, and excess sludge passes through clarifier sludge discharge tube Discharge, sedimentation basin be discharged BOD < 50mg/L, SS < 50mg/L, with water inlet compared to sedimentation basin be discharged ammonium oxidation rate less than 10%, C/N<0.5；

E, the water outlet of each group sedimentation basin enters respective first autotrophic denitrification pond through the first autotrophic denitrification pond inlet pipeline, passes through The nitrite bacteria of apposition growth and anaerobic ammonium oxidizing bacteria carries out short distance nitration respectively and Anammox is anti-on suspending carrier It answers, completes the part removal of total nitrogen, and do not add organic carbon source；

F, each group the first autotrophic denitrification pond water outlet enters respective second autotrophic denitrification pond, is given birth to by adhering on suspending carrier Long nitrite bacteria and anaerobic ammonium oxidizing bacteria carries out short distance nitration and Anammox reaction respectively, complete total nitrogen into one Step removal, and do not add organic carbon source；

G, each group the second autotrophic denitrification pond water outlet enters respective aerobic nitrification pond, passes through apposition growth on suspending carrier Nitrobacteria completes the removal of remaining ammonia nitrogen；Aerobic nitrification pond DO > 2mg/L；

H, the water outlet of aerobic nitrification pond enters degassing pond, reduces the DO of carrying, is partially back to by nitrification liquid reflux line Anoxic pond, remaining is discharged by total outlet pipe road；

If i, single group reaction tank from the first autotrophic denitrification pond, the second autotrophic denitrification pond to aerobic nitrification tank TN removal rate < 40%, then this group of reaction tank is switched into high ammonia-nitrogen wastewater mode, the high ammonia-nitrogen wastewater mode are as follows: influent ammonia nitrogen > 150mg/L, it is 2.0-3.0mg/L that the first autotrophic denitrification pond, which controls DO, and it is 1.5-2.0mg/L that the second autotrophic denitrification pond, which controls DO, It is 4.0-8.0mg/L that aerobic nitrification pond, which controls DO, and the TN removal volumetric loading in the first autotrophic denitrification pond to aerobic nitrification tank is dirt 2-4 times of aqueous mode, this group of reaction tank are not discharged individually, this group of reaction tank degassing pond tail water all flows back through tail water reflux unit To the first autotrophic denitrification pond of another group of reaction tank, until this group of reaction tank is from the first autotrophic denitrification pond, the second autotrophic denitrification pond Mainstream sewage mode operation is reverted to after to TN removal rate > 50% of aerobic nitrification tank.

Further preferably, the anaerobic pond, anoxic pond, the activated sludge in aerobic decarburization pond, it is living when water temperature T >=20 DEG C Property sludge sludge age < 3d；When water temperature T < 20 DEG C, activated sludge sludge age is in 3-7d；First autotrophic denitrification pond, the second autotrophic denitrification Sludge concentration < 300mg/L in pond, aerobic nitrification pond；Total TN removal rate in the first autotrophic denitrification pond and the second autotrophic denitrification pond > 35%.

Another task of the invention is to provide a kind of remodeling method of mainstream autotrophic denitrification modernization system based on MBBR, It is to handle AAO technique: water inlet → anaerobic phosphorus release → anoxic denitrification denitrogenation → aerobic nitrification → degassing → precipitating with raw sewage It based on pond → water outlet, is transformed on the structures of original technique, wherein the structures of original technique include three biologies Pond, i.e. anaerobic pond, anoxic pond, aerobic tank, degassing pond, sedimentation basin and sludge reflux and nitrification liquid return line, by each biological tank Between flow to and be transformed, and each functional areas are repartitioned.

Above-mentioned specific remodeling method successively the following steps are included:

A, each biological tank structures of original process are parallel to water (flow) direction and are divided into two groups of pond bodies, two groups of pond body pool capacities are complete Unanimously, respectively the first denitrification system/second denitrification system；

B, the first denitrification system/second denitrification system original process anoxic zone pool capacity is repartitioned, by anoxic pond part pond Appearance transform aerobic decarburization pond as, and transformation part bottom of pond adds aerator, increases aerobic decarburization pond in aerobic decarburization pond end and goes out Water lines, the aerobic decarburization pond outlet pipeline other end connect sedimentation basin, former sedimentation basin water outlet are reduced certain altitude, so that good The water outlet of oxygen decarburization pond can be left to sedimentation basin certainly；

C, water passage between aerobic decarburization pond and aerobic tank is closed, the most intimate friend so that water outlet of aerobic decarburization pond can not flow automatically Oxygen pond；

D, aerobic tank is divided into three parts, respectively the first autotrophic denitrification pond, the second autotrophic denitrification pond, aerobic nitrification pond, Increase partition between each pond body, the mouth of a river was added on partition, and intercept sieve crossing to increase in front of the mouth of a river, in aerobic tank water inlet end Increase by the first autotrophic denitrification pond inlet pipeline, the other end of the first autotrophic denitrification pond inlet pipeline connects sedimentation basin end；

E, total outlet pipe road is added in degassing pond, total outlet pipe road reduces certain altitude compared with sedimentation basin water outlet, so that heavy The water outlet of shallow lake pond can flow to the first autotrophic denitrification pond certainly；Tail water reflux unit is separately set in degassing Chi Chu, the tail water reflux unit The other end connects the first autotrophic denitrification pond of another group of denitrification system.

A kind of working principle of the mainstream autotrophic denitrification modernization system based on MBBR of the present invention are as follows:

Autotrophic denitrification transformation is carried out with the extensive AAO technique of current application, using activated Sludge System for raw water carbon source The advantages of utilization rate height, organic matter high treating effect, realizes biological phosphate-eliminating, denitrifying strengthened denitrification by ultrashort sludge age and has The depth of machine object removes；Autotrophic denitrification technique is loaded using pure film MBBR technique, the high load capacity of total nitrogen can be realized without carbon source Processing, in addition, it is lower for mainstream sewage ammonia nitrogen concentration, therefore longtime running is likely to occur the degeneration of autotrophic denitrification functional microorganism The case where, therefore be down to system after 40% or less in autotrophic denitrification link TN removal rate and start to intake and be changed to high ammonia-nitrogen wastewater To be enriched with autotrophic denitrification functional microorganism, and this group of reaction tank does not drain individually, is discharged further into another group of autotrophic denitrification pond Increase influent load to be enriched with autotrophic denitrification functional microorganism, single group improves after water another group, and can still to operate normally processing mainstream dirty Water does not influence or influences less system operation.

Compared with prior art, present invention offers following advantageous effects:

1) transformation is simple, former pond transformation, it is only necessary to re-start simple function to the technique original anoxic zone AAO and aerobic zone and draw Point, it adds partition etc. and correlation crosses water lines, make full use of former Chi Chirong, reduce improvement expenses and difficulty of construction；

2) energy-saving, main denitrification process is changed into autotrophic denitrification technology by traditional nitration denitrification, can save 60% Aeration expense and 100% outer throwing carbon source, denitrogenation limit by water inlet C/N, suitable city mainstream sewage treatment；In addition, first Autotrophic denitrification pond, the second autotrophic denitrification pond, aerobic nitrification pond are all made of pure membrane process, reduce system sludge amount, and autotrophy is de- Nitrogen process sludge low output can substantially reduce project sludge treatment expense；

3) operation stability is strong, the alternate run based on high ammonia-nitrogen wastewater and mainstream sewage, is anaerobic ammonia oxidizing bacteria interval Property high ammonia nitrogen environment is provided, can enrichment function microorganism rapidly, guarantee that the withholding of anaerobic ammonia oxidizing bacteria is not degenerated；

4) water outlet guarantee property is high, the design to be flowed back by tail water, effectively prevent high ammonia-nitrogen wastewater to go out in the operation of high ammonia nitrogen Water is exceeded, it is ensured that stable water outlet reaches design requirement, and being added for anoxic pond can be using contained by the matrix and water inlet that nitrification liquid flows back COD carries out denitrification, reduces water outlet TN, and can supplement certain basicity, strengthened denitrification effect for subsequent technique；Aerobic decarburization pond can Influent COD is further decreased to the adverse effect of autotrophic denitrification functional microorganism, is created a favorable environment for autotrophic denitrification reaction tank； Technique ensures that stable water outlet is up to standard entirely through the combination of each reaction tank function；

5) biological phosphate-eliminating stability and high efficiency: system changes adjustment sludge age in due course according to water temperature, and polyP bacteria is made to remain super Short sludge age, and then keep biological phosphor-removing effect stable and efficiently；

6) operation is simple, and capacity of resisting impact load is strong: autotrophic denitrification pond is based on MBBR technique, comparison activated sludge process without Sludge reflux need to be set, be not necessarily to backwash compared to fixed-bed process, operation is relatively simple, meanwhile, suspending carrier is to the micro- life of function The reinforcing enrichment of object is so that system can bear long period water quality and water impact without influencing outlet effect.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawing:

Fig. 1 is a kind of mainstream autotrophic denitrification modernization system top view based on MBBR of the present invention；

In figure, 1, anaerobic pond, 2, anoxic pond, 3, aerobic decarburization pond, the 4, first autotrophic denitrification pond, the 5, second autotrophic denitrification Pond, 6, aerobic nitrification pond, 7, degassing pond, 8, sedimentation basin, the 9, first blender, the 10, second blender, 11, first intercepts sieve, 12, second sieve, 13, third interception sieve, 14, suspending carrier, 15, water inlet manifold road, 16, aerobic decarburization pond outlet pipe are intercepted Road, the 17, first autotrophic denitrification pond inlet pipeline, 18, sludge reflux pipeline, 19, nitrification liquid return line, 20, tail water return pipe Road, 21, total outlet pipe road.

Specific embodiment

The invention proposes a kind of mainstream autotrophic denitrification modernization system and remodeling method based on MBBR, in order to make the present invention The advantages of, technical solution it is clearer, clear, below with reference to specific embodiment, the present invention is described in more detail.

Firstly, being explained as follows to relevant technical terms involved in the present invention:

1) AAO technique: AAO technique is the abbreviation (anaerobism/lack of English Anaerobic/Anoxic/Oxic first letter Oxygen/aerobic method), it is a kind of common sewage treatment process, while there is good Nitrogen/Phosphorus Removal.Sewage and returned sludge It is introduced into anaerobic pond (DO < 0.5mg/L, ORP < -250mv) to be thoroughly mixed, through certain time (1-2h) anaerobic digestion, removal portion Divide BOD, part nitrogenous compound is converted to N₂(denitrification), the poly- phosphorus Microbiological release in returned sludge go out phosphorus, meet bacterium Demand to phosphorus.Then sewage flows into anoxic pond (ORP ≈ -100mv or so), and denitrifying bacteria is in pond with undecomposed in sewage Carbonaceous organic material is carbon source, the NO that aerobic tank inner circulating reflux is returned₃ ^-It is reduced to N₂, then sewage flows into aerobic tank (ORP > 40mv), the NH in water₄ ⁺It carries out nitration reaction and generates NO₃ ^-, while Organic substance in water oxygenolysis supplies poly- phosphorus microorganism energy, Microorganism absorbs phosphorus from water, and phosphorus enters cell tissue, is discharged in the form of rich phosphorous sludge from system after sedimentation basin separates.

2) autotrophic denitrification: the technique is the general designation of nitrosation and Anammox (ANAMMOX), to reach the mesh of denitrogenation 's；Under aerobic condition, nitrite bacteria (AOB) is by ammonia nitrogen partial oxidation at nitrous acid, the nitrous acid and some residual of generation Ammonia nitrogen anaerobic ammonia oxidizing bacteria (AnAOB) effect issue anaerobic ammonium oxidation of beginning to detest (ANAMMOX) reaction generate nitrogen；

3) effective ratio area: unit volume suspending carrier is able to achieve good mass-transfer and passes oxygen, and can grow effective microbe Shielded surface area, m²/m³；

4) voidage: by suspending carrier natural packing in 1m × 1m × 1m container, in suspending carrier natural packing plane After concordant with plane on cabinet, tap water is filled in case, is calculated the volume that tap water is added, is repeated 3 times, takes its arithmetic average It is worth and multiplied by 100%, %；

5) fluidize: filler flows with water flow sufficiently connect with water quality pollutant in a liquid under the active force for being aerated or stirring The state of touching, suspending carrier do not generate accumulation, can flow freely in pond with water flow；

6) TN removes volumetric loading: the TN mass that unit volume reaction tank removes daily, kgN/m³/d；As the first autotrophy is de- Nitrogen pond is to aerobic nitrification tank TN removal volumetric loading=(the first autotrophic denitrification pond intake TN- aerobic nitrification pond be discharged TN) ÷ first Autotrophic denitrification pond is to the total daily amount of inlet water of pool capacity ÷ reaction tank of aerobic nitrification tank；

7) ammonia oxidation rate: the removal amount of ammonia nitrogen accounts for the ratio of system influent ammonia nitrogen, %；Such as water inlet through anaerobic pond, anoxic pond, Ammonium oxidation rate after aerobic decarburization pond, sedimentation basin=(influent ammonia nitrogen-sedimentation basin is discharged ammonia nitrogen) total influent ammonia nitrogen of ÷ system × 100%；

8) C/N: refer to BOD in water₅With the ratio of kjeldahl nitrogen (organic nitrogen+ammonia nitrogen)；

9) TN removal rate: the removal amount of total nitrogen accounts for the ratio of system water inlet total nitrogen, %；If reaction tank is from the first autotrophic denitrification TN removal rate=(the first autotrophic denitrification pond water inlet TN- aerobic nitrification pond water outlet in pond, the second autotrophic denitrification pond to aerobic nitrification tank TN) ÷ system is always intake TN × 100%.

As shown in Figure 1, a kind of mainstream autotrophic denitrification modernization system based on MBBR of the present invention, major technique design is By the way that former pond in the prior art is transformed, it may be assumed that only need to re-start simply the technique original anoxic zone AAO and aerobic zone Function division.

Specifically, including two groups of denitrification systems, respectively the first denitrification system and the second denitrification system, the two after transformation Structure is identical, and the first denitrification system/second denitrification system includes reaction tank, tail water reflux unit, agitating device and related process Pipeline, reaction tank include anaerobic pond 1 successively arranged side by side, anoxic pond 2, aerobic decarburization pond 3, the first autotrophic denitrification pond 4, second Autotrophic denitrification pond 5, aerobic nitrification pond 6, degassing pond 7, sedimentation basin 8；

Above-mentioned related process pipeline includes water inlet manifold road 15, aerobic decarburization pond outlet pipeline 16, the first autotrophic denitrification Pond inlet pipeline 17, sludge reflux pipeline 18, nitrification liquid return line 19, tail water reflux line 20, total outlet pipe road 21.

Above-mentioned agitating device is used to be stirred activated sludge, including is located at anaerobic pond, anoxic pond, aerobic decarburization The first blender 9, the second blender 10 in pond, are preferably also equipped with blender in aerobic decarburization pond；Certainly, it is stirred with each It mixes driving device that device matches etc. and no longer does detailed redundant, those skilled in the art use for reference the prior art and can be realized, each The structure of blender is also not described in detail, and sludge reflux flowmeter is additionally provided on above-mentioned sludge return pipe, described Nitrification liquid return flow meter is additionally provided on nitrification liquid reflux line.

The present invention is inoculated with common sewage treatment plant's activity in above-mentioned anaerobic pond 1, anoxic pond 2, aerobic decarburization pond 3 Sludge；

Suspending carrier 14 has been added in the first autotrophic denitrification pond 4, the second autotrophic denitrification pond 5, aerobic nitrification pond 6；

It is provided with aeration tube in above-mentioned aerobic decarburization pond and aerobic nitrification pond bottom of pond, in the first autotrophic denitrification pond, Two autotrophic denitrification pond bottom of pond are provided with micropore aeration pipe and boring aeration pipe；Anaerobic pond connects above-mentioned water inlet manifold road 15, takes off Gas pond connects above-mentioned total outlet pipe road 21；Boring aeration pipe provides stronger hydraulic shear to realize the fluidisation of suspending carrier, together When supplemental oxygen, micro-pore aeration then mainly supplied oxygen with the tiny bubble of generation, and auxiliary, which provides shearing force, enhances suspending carrier Fluidisation.

The bottom of sedimentation basin is provided with mud discharging pipe；Aerobic decarburization pond outlet pipeline is used to connect the aerobic decarburization Pond and the sedimentation basin, one end positioned at aerobic decarburization pond is as water inlet, and one end positioned at sedimentation basin is as water outlet；The One autotrophic denitrification pond inlet pipeline is for connecting sedimentation basin and the first autotrophic denitrification pond, positioned at one end conduct of sedimentation basin Water inlet, one end positioned at the first autotrophic denitrification pond is as water outlet；Sludge pipeline is located at for connecting sedimentation basin and anaerobic pond One end of sedimentation basin is provided with sludge positioned at one end of anaerobic pond as mud mouth as mud inlet on sludge return pipe Reflux pump；For connecting degassing pond and anoxic pond, one end positioned at degassing pond is located at and lacks as water inlet nitrification liquid return line The one end in oxygen pond is provided with nitrification liquid reflux pump on nitrification liquid reflux line as water outlet；Tail water reflux unit includes tail water Reflux pump and the tail water reflux line in the first autotrophic denitrification pond for connecting degassing pond and another group of reaction tank are located at degassing pond One end as water inlet, one end positioned at another group of the first autotrophic denitrification of reaction tank pond is as water outlet；

The present invention preferably between anaerobic pond and anoxic pond, between anoxic pond and aerobic decarburization pond, the first autotrophic denitrification pond Between the second autotrophic denitrification pond, between the second autotrophic denitrification pond and aerobic nitrification pond, aerobic nitrification pond and degassing pond between Separated by partition, be provided on partition keep adjacent reaction pond connection cross the mouth of a river, cross the mouth of a river include be located at anaerobic pond with Anaerobic pond on the spacing board of anoxic pond crosses the mouth of a river, the anoxic pond on the spacing board in anoxic pond Yu aerobic decarburization pond crosses water Mouthful, the first autotrophic denitrification pond on the spacing board in the first autotrophic denitrification pond and the second autotrophic denitrification pond crosses the mouth of a river, is located at the The second autotrophic denitrification pond on the spacing board in two autotrophic denitrification ponds and aerobic nitrification pond crosses the mouth of a river and is located at aerobic nitrification pond and takes off The mouth of a river is crossed in aerobic nitrification pond on the spacing board in gas pond.

The present invention is preferably before the front at the mouth of a river is crossed in the first autotrophic denitrification pond, the mouth of a river is crossed in the second autotrophic denitrification pond Side is respectively arranged with the first interception sieve 11, second and intercepts sieve 12；First interception sieve, the second interception sieve are being transported on edge thereon 30cm below row water level, lower edge are higher than the half of operating water level, and operating water level is installed with the lower edge on the total outlet pipe road It is highly identical；It is crossed in front of the mouth of a river in the aerobic nitrification pond and is provided with third interception sieve 13, third intercepts the upper of sieve Along in operating water level, 65% hereinafter, lower edge is higher than the 35% of operating water level, operating water level is pacified with the lower edge on total outlet pipe road Dress height is identical.

The preferred suspending vehicle density of the present invention is 0.97-0.99g/cm³, voidage > 90%, suspending carrier effective ratio table Area is 620-1200m²/m³.Density is slightly less than water before suspending carrier biofilm, and density is worked as with water phase after biofilm, to can guarantee Even fluidizing in pond, higher porosity can adhere to for microorganism provides huge specific surface area.

The preferred aeration tube of the present invention, boring aeration pipe opening direction downward, hatch bore diameter 4-6mm, mounting height position In the above 30cm of respective bottom of pond, micropore aeration pipe is aerated by microporous aeration disc or micro porous aeration head, and aeration plate or aeration head are opened Upwards, the mounting height of micropore aeration pipe is higher by the boring aeration pipe 10-20cm to mouth.

On the basis of understanding the above-mentioned mainstream autotrophic denitrification modernization system based on MBBR, its operational mode is done further Illustrate:

It includes two kinds of operational modes:

The operation of mainstream autotrophic denitrification modernization system to above-mentioned based on MBBR below, elaborates.

Successively the following steps are included:

It elaborates below to the remodeling method of the mainstream autotrophic denitrification modernization system the present invention is based on MBBR, it is main Technical concept are as follows: it is that AAO technique is handled with raw sewage: water inlet → anaerobic phosphorus release → anoxic denitrification denitrogenation → aerobic nitrification → It based on degassing → sedimentation basin → water outlet, is transformed on the structures of original technique, wherein the structures packet of original technique Three biological tanks, i.e. anaerobic pond, anoxic pond, aerobic tank, degassing pond, sedimentation basin and sludge reflux and nitrification liquid return line are included, Flow direction between each biological tank is transformed, and each functional areas are repartitioned.

Specific remodeling method, comprising the following steps:

E, total outlet pipe road is added in degassing pond, total outlet pipe road reduces certain altitude compared with sedimentation basin water outlet, so that heavy The water outlet of shallow lake pond can flow to the first autotrophic denitrification pond certainly；Tail water reflux unit is separately set in degassing Chi Chu, the tail water reflux unit The other end connects the first autotrophic denitrification pond of another group of denitrification system

For the ease of understanding the main innovation point of the application, the present invention is done furtherly combined with specific embodiments below It is bright.

Embodiment 1:

Certain sewage treatment plant designs water 20000m³/ d, influent COD, BOD₅、NH₃, TN, TP design value be respectively 500, 260,55,70,9mg/L, were AAO technique originally, and treatment effect is unstable, and water outlet is easily exceeded when water quality and quantity impacts, by being based on After the autotrophic denitrification transformation of mainstream MBBR, the sum of total residence time is 10.3h；Anaerobic pond, anoxic pond, aerobic decarburization pond sludge Concentration is 2500-3000mg/L；13-24 DEG C of water temperature, activated Sludge System sludge age is adjusted with water temperature, when water temperature is 13-20 DEG C, sludge age 2.5d, when water temperature be 20-24 DEG C, sludge age 5.5d；Anaerobic pond ORP < -250mV；Anoxic pond DO < 0.4mg/L；First autotrophic denitrification pond suspending carrier filling rate is 40%, and film surface load is in 2.0-2.5gN/m²D, DO 1.5- 2.0mg/L；Second autotrophic denitrification pond suspending carrier filling rate is 50%, and film surface load is in 0.8-1.2gN/m²D, DO 1.0- 1.5mg/L；Aerobic nitrification pond suspending carrier filling rate is 35%, and film surface load is in 1.0-1.2gN/m²D, DO 2-4mg/L； Anaerobic pond hydraulic detention time is in 95min, and sedimentation basin surface loading is in 1.9/m²·h；First autotrophic denitrification pond, the second autotrophy are de- Nitrogen pond, aerobic nitrification pond SS < 300mg/L；It is discharged COD, BOD₅、NH₃, TN, TP average value be respectively 11.4,1.3,0.32, 4.01,0.11mg/L.Ton water process expense is by 0.43 yuan/m before being transformed³It is down to 0.39 yuan/m³,

Embodiment 2:

Technological parameter is provided that

Certain integration apparatus designs water 300m³/ d, influent COD, BOD₅、NH₃, TN, TP design value be respectively 410, 220,31,39,5.5mg/L were that AAO technique is handled originally, and processing is unstable, and winter nitrification effect difference causes just to return NH₄ ⁺And TN is exceeded, and after based on the transformation of the autotrophic denitrification of mainstream MBBR, the sum of total residence time is 8.0h；It is anaerobic pond, anoxic pond, good The sludge concentration in oxygen decarburization pond is 2500-3000mg/L；12-27 DEG C of water temperature, activated Sludge System sludge age is carried out with water temperature Adjustment, when water temperature be 12-20 DEG C, sludge age 2.0d, when water temperature be 20-27 DEG C, sludge age 6.0d；Anaerobic pond ORP <- 250mV；Anoxic pond DO < 0.4mg/L；First autotrophic denitrification pond suspending carrier filling rate is 50%, and film surface load is in 1.5- 2.0gN/m²D, DO 1.5-2.0mg/L；Second autotrophic denitrification pond suspending carrier filling rate is 40%, and film surface load is in 0.7- 1.0gN/m²D, DO 1.0-1.5mg/L；Aerobic nitrification pond suspending carrier filling rate is 40%, and film surface load is in 0.8- 1.0gN/m²D, DO 2-6mg/L；Anaerobic pond hydraulic detention time is in 60min；Secondary settling tank surface loading is in 1.4m³/m²·h； First autotrophic denitrification pond, the second autotrophic denitrification pond, aerobic nitrification pond SS < 300mg/L are discharged COD, BOD₅、NH₃, TN, TP it is average Value is respectively 14.2,3.2,1.22,3.25,0.11mg/L.

Comparative example 1:

Certain Sewage Treatment Project designs water 700m³/ d, influent COD, BOD₅、NH₃, TN, TP design value be respectively 550, 270,52,59,2.2mg/L, treatment process be anaerobism fixed bed decarburization pond, aerobic decarburization pond, primary sedimentation tank, autotrophic denitrification pond, Secondary settling tank, total residence time 19h, aerobic decarburization pond use activated sludge form, control sludge concentration 2500-3000mg/L, from It supports denitrification tank and uses granule sludge form, control sludge concentration 3000-3500mg/L.The project is in process choice, due to not The denitrification system of two or more sets parallel runnings is set, occurs autotrophic denitrification spawn degeneration after single group longtime running, project stops Mainstream wastewater influent is enriched with strain using high ammonia-nitrogen wastewater, is discharged again into mainstream sewage after nitrogen removal rate recovery, due to Not set tail water flows back, and treatment effect is limited during high ammonia-nitrogen wastewater, is discharged discharge beyond standards；On denitrification effect, due to particle The autotrophic denitrification of sludge form easily leads to strain and is lost with water outlet, and during which system secondary settling tank slightly failure causes system to run mud, And then outlet effect is influenced, often there is the water outlet exceeded situation of TN；On phosphor-removing effect, since system anaerobic pond uses fixed bed, System activity sludge is recycled without anaerobic-anoxic, and polyP bacteria can not excessively inhale phosphorus, causes water outlet TP continuously exceeded.Finally, should Project is rectified and improved again.

Comparative example 2:

Certain integration apparatus designs water 5000m³/ d, influent COD, BOD₅、NH₃, TN, TP, SS design value be respectively 440,230,47,61,7,370mg/L, equipment include reactor, and reactor is combined by MBBR with Magneto separate precipitating the two Mode handles sewage, wherein reactor include the anaerobic pond being sequentially communicated, anoxic pond, aerobic decarburization pond, secondary settling tank, First autotrophic denitrification pond, the second autotrophic denitrification pond, aerobic nitrification pond, degassing pond, dosing mixing pit, magnetic kind load pond, flocculation are anti- Ying Chi and final deposition pool；It further include magnetic powder separator and magnetic powder recovering device, the sludge out pipe company of magnetic powder separator and final deposition pool It connects, magnetic powder recovering device is connect with magnetic powder separator, magnetic kind load pond respectively, is connected between aerobic nitrification pond and anoxic pond There is nitrification liquid return pipe.The sum of the equipment total residence time is 9.7h；Due to the denitrogenation of two or more sets not set parallel runnings There is autotrophic denitrification spawn degeneration after single group longtime running in system, and project will stop mainstream wastewater influent at that time, using high ammonia nitrogen Waste water is enriched with strain, is discharged again into mainstream sewage after nitrogen removal rate recovery, and since not set tail water flows back, high ammonia nitrogen is useless Treatment effect is limited during water, is discharged discharge beyond standards；Finally, which is rectified and improved again.

It degenerates due to not considering that system will lead to autotrophic denitrification microbial flora for a long time with low ammonia nitrogen waste water operation, because , there is apparent TN removal rate decline, and autotrophic denitrification theory coefficient rises, and illustrates in system in this after system longtime running There is Nitromonas activity, autotrophic denitrification functional microorganism need to be enriched with again with high ammonia-nitrogen wastewater while inhibiting Nitromonas active.

Above-mentioned unlisted part can obviously be realized under the guide of above-described embodiment 1-2.

In the description of the present invention, it is to be understood that, term " center ", "upper", "lower", "front", "rear", " left side ", The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure Orientation or positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning or Element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.

Specific embodiment described herein is only to spiritual example explanation of the invention.Belonging to the present invention Those skilled in the art can make various modifications or additions to the described embodiments or using similar Mode substitutes, and however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.

Claims

1. a kind of mainstream autotrophic denitrification modernization system based on MBBR, it is characterised in that: it includes two groups identical first Denitrification system and the second denitrification system, wherein the first denitrification system/second denitrification system include reaction tank, tail water reflux unit, Agitating device and related process pipeline, the reaction tank include anaerobic pond successively arranged side by side, anoxic pond, aerobic decarburization Pond, the first autotrophic denitrification pond, the second autotrophic denitrification pond, aerobic nitrification pond, degassing pond, sedimentation basin；

The related process pipeline includes aerobic decarburization pond outlet pipeline, the first autotrophic denitrification pond inlet pipeline, sludge reflux Pipeline and nitrification liquid return line；

Be provided with aeration tube in the aerobic decarburization pond and aerobic nitrification pond bottom of pond, the first autotrophic denitrification pond, Second autotrophic denitrification pond bottom of pond is provided with micropore aeration pipe and boring aeration pipe；

The bottom of the sedimentation basin is provided with mud discharging pipe；

The aerobic decarburization pond outlet pipeline is used to connect the aerobic decarburization pond and the sedimentation basin, is located at aerobic de- The one end in carbon pond is as water inlet, and one end positioned at sedimentation basin is as water outlet；

The first autotrophic denitrification pond inlet pipeline is used to connect the sedimentation basin and the first autotrophic denitrification pond, position In one end of sedimentation basin as water inlet, one end positioned at the first autotrophic denitrification pond is as water outlet；

The sludge pipeline is used to connect the sedimentation basin and the anaerobic pond, is used as positioned at one end of sedimentation basin into mud Mouthful, positioned at one end of anaerobic pond as mud mouth, sludge reflux pump is provided on the sludge return pipe；

The nitrification liquid return line is used to connect the degassing pond and the anoxic pond, and one end positioned at degassing pond is made For water inlet, positioned at one end of anoxic pond as water outlet, nitrification liquid reflux pump is provided on the nitrification liquid reflux line；

The tail water reflux unit includes tail water reflux pump and the first autotrophy for connecting degassing pond and another group of reaction tank The tail water reflux line of denitrification tank, one end positioned at degassing pond are located at another group of the first autotrophic denitrification of reaction tank as water inlet The one end in pond is as water outlet；

The agitating device is for being stirred activated sludge.

2. a kind of mainstream autotrophic denitrification modernization system based on MBBR according to claim 1, it is characterised in that: described Agitating device includes being located at the anaerobic pond, the first blender in anoxic pond, the second blender；The sludge reflux It is additionally provided with sludge reflux flowmeter on pipeline, nitrification liquid return flow meter is additionally provided on the nitrification liquid reflux line.

3. a kind of mainstream autotrophic denitrification modernization system based on MBBR according to claim 1, it is characterised in that: described Anaerobic pond and anoxic pond between, between anoxic pond and aerobic decarburization pond, the first autotrophic denitrification pond and the second autotrophic denitrification pond it Between, between the second autotrophic denitrification pond and aerobic nitrification pond, between aerobic nitrification pond and degassing pond by partition separation, described Partition on be provided with the mouth of a river of crossing for keeping the connection of adjacent reaction pond, it is described cross the mouth of a river include be located at anaerobic pond and anoxic pond it Anaerobic pond on spacing board crosses the mouth of a river, the anoxic pond on the spacing board in anoxic pond Yu aerobic decarburization pond crosses the mouth of a river, is located at the It crosses the mouth of a river, be located at the second autotrophic denitrification in the first autotrophic denitrification pond on the spacing board in one autotrophic denitrification pond and the second autotrophic denitrification pond The second autotrophic denitrification pond on the spacing board in pond and aerobic nitrification pond crosses the mouth of a river and is located at the interval in aerobic nitrification pond and the pond that deaerates The mouth of a river is crossed in aerobic nitrification pond on plate.

4. a kind of mainstream autotrophic denitrification modernization system based on MBBR according to claim 1, it is characterised in that: described The first autotrophic denitrification pond cross the front at the mouth of a river, the second autotrophic denitrification pond is crossed being respectively arranged in front with for the mouth of a river and first is blocked Cut sieve, the second interception sieve；Described first intercepts sieve, the second interception sieve edge 30cm below operating water level thereon, Lower edge is higher than the half of operating water level, and the operating water level is lower identical along mounting height with the total outlet pipe road； It is crossed in front of the mouth of a river in the aerobic nitrification pond and is provided with third interception sieve, the upper edge that the third intercepts sieve is being transported The 65% of row water level is hereinafter, lower edge is higher than the 35% of operating water level, the operating water level, with the total outlet pipe road It is lower identical along mounting height.

5. a kind of mainstream autotrophic denitrification modernization system based on MBBR according to claim 1, it is characterised in that: described Suspending vehicle density is 0.97-0.99g/cm³, voidage > 90%, suspending carrier effective ratio area is 620-1200m²/m³。

6. a kind of mainstream autotrophic denitrification system based on MBBR according to claim 1, it is characterised in that: the aeration Pipe, boring aeration pipe opening direction downward, hatch bore diameter 4-6mm, mounting height is located at the above 30cm of respective bottom of pond, institute The micropore aeration pipe stated is aerated by microporous aeration disc or micro porous aeration head, aeration plate or aeration head opening upwards, the micropore The mounting height of aeration tube is higher by the boring aeration pipe 10-20cm.

7. a kind of operational mode of mainstream autotrophic denitrification modernization system based on MBBR according to claim 1, feature It is comprising two kinds of operational modes:

The first, mainstream sewage mode；Influent ammonia nitrogen < 150mg/L, the first autotrophic denitrification pond control DO be 1.5-2.0mg/L, second It is 1.0-1.5mg/L that autotrophic denitrification pond, which controls DO, and it is 2-6mg/L that aerobic nitrification pond, which controls DO, and the first autotrophic denitrification pond is to aerobic It is 0.1-0.3kgN/m that nitrification tank TN, which removes volumetric loading,³/d；

The second, high ammonia-nitrogen wastewater mode；Influent ammonia nitrogen > 150mg/L, it is 2.0-3.0mg/L that the first autotrophic denitrification pond, which controls DO, the It is 1.5-2.0mg/L that two autotrophic denitrification ponds, which control DO, and it is 4-8mg/L, the first autotrophic denitrification pond most intimate friend that aerobic nitrification pond, which controls DO, Oxygen nitrification tank TN removes 2-4 times that volumetric loading is sewage mode.

8. a kind of operation method of the mainstream autotrophic denitrification modernization system based on MBBR, it is characterised in that: it uses claim A kind of described in any item mainstream autotrophic denitrification modernization systems based on MBBR of 1-6, the operation method successively includes following Step:

A, each reaction tank is all made of mainstream sewage mode operation, the mainstream sewage mode are as follows: influent ammonia nitrogen < 150mg/L, the It is 1.5-2.0mg/L that one autotrophic denitrification pond, which controls DO, and it is 1.0-1.5mg/L, aerobic nitrification pond that the second autotrophic denitrification pond, which controls DO, Control DO is 2-6mg/L, and the first autotrophic denitrification pond to aerobic nitrification tank TN removal volumetric loading is 0.1-0.3kgN/m³/d；To It handles mainstream sewage and is synchronized first through water inlet manifold road and entered in the anaerobic pond of the first denitrification system and the second denitrification system, each group The activated sludge of sedimentation basin reflux carries out anaerobic phosphorus release using dirty Organic substance in water；Anaerobic pond ORP < -400mV；Anaerobism tank waterpower Residence time is in 45-90min；

B, each group anaerobic pond water outlet respectively enters respective anoxic pond, is completed by the denitrifying bacteria that grows in activated sludge to returning The nitrate removal that nitrification liquid carries is flowed, while consuming raw water partial organic substances；Anoxic pond ORP < -50mv, DO < 0.4mg/L；

C, the water outlet of each group anoxic pond respectively enters respective aerobic decarburization pond, and it is organic to complete raw water by the heterotroph in activated sludge The removal of object；Aerobic decarburization pond DO > 1mg/L；

D, the aerobic decarburization pond water outlet of each group respectively enters respective sedimentation basin through aerobic decarburization pond outlet pipeline, completes mud-water separation, Sludge after sedimentation is back to respective anaerobic pond by mud return line, and excess sludge is arranged by clarifier sludge discharge tube It puts, sedimentation basin is discharged BOD < 50mg/L, SS < 50mg/L, and sedimentation basin water outlet ammonium oxidation rate is less than 10%, C/N compared with water inlet <0.5；

E, the water outlet of each group sedimentation basin enters respective first autotrophic denitrification pond through the first autotrophic denitrification pond inlet pipeline, passes through suspension The nitrite bacteria of apposition growth and anaerobic ammonium oxidizing bacteria carry out short distance nitration and Anammox reaction respectively on carrier, complete It is removed at the part of total nitrogen, and does not add organic carbon source；

F, each group the first autotrophic denitrification pond water outlet enters respective second autotrophic denitrification pond, passes through apposition growth on suspending carrier Nitrite bacteria and anaerobic ammonium oxidizing bacteria carry out short distance nitration and Anammox reaction respectively, complete further going for total nitrogen It removes, and does not add organic carbon source；

G, each group the second autotrophic denitrification pond water outlet enters respective aerobic nitrification pond, passes through the nitrification of apposition growth on suspending carrier Bacterium completes the removal of remaining ammonia nitrogen；Aerobic nitrification pond DO > 2mg/L；

H, the water outlet of aerobic nitrification pond enters degassing pond, reduces the DO of carrying, is partially back to anoxic by nitrification liquid reflux line Pond, remaining is discharged by total outlet pipe road；

If i, single group reaction tank is from TN removal rate < 40% in the first autotrophic denitrification pond, the second autotrophic denitrification pond to aerobic nitrification tank, This group of reaction tank is then switched into high ammonia-nitrogen wastewater mode, the high ammonia-nitrogen wastewater mode are as follows: influent ammonia nitrogen > 150mg/L, the It is 2.0-3.0mg/L that one autotrophic denitrification pond, which controls DO, and it is 1.5-2.0mg/L, aerobic nitrification pond that the second autotrophic denitrification pond, which controls DO, Control DO is 4.0-8.0mg/L, and the TN removal volumetric loading in the first autotrophic denitrification pond to aerobic nitrification tank is the 2-4 of sewage mode Times, this group of reaction tank is not discharged individually, this group of reaction tank degassing pond tail water through tail water reflux unit be all back to another group it is anti- The first autotrophic denitrification pond of Ying Chi, until this group of reaction tank is from the first autotrophic denitrification pond, the second autotrophic denitrification pond to aerobic nitrification Mainstream sewage mode operation is reverted to after TN removal rate > 50% in pond.

9. a kind of operation method of mainstream autotrophic denitrification modernization system based on MBBR according to claim 8, feature It is: the anaerobic pond, anoxic pond, the activated sludge in aerobic decarburization pond, when water temperature T>=20 DEG C, activated sludge sludge age< 3d；When water temperature T < 20 DEG C, activated sludge sludge age is in 3-7d；First autotrophic denitrification pond, the second autotrophic denitrification pond, aerobic nitrification pond Interior sludge concentration < 300mg/L；Total TN removal rate > 35% in the first autotrophic denitrification pond and the second autotrophic denitrification pond.

10. a kind of remodeling method of the mainstream autotrophic denitrification modernization system based on MBBR, it is characterised in that: the remodeling method Successively the following steps are included:

A, each biological tank structures of original process are parallel to water (flow) direction and are divided into two groups of pond bodies, two groups of pond body pool capacities complete one It causes, respectively the first denitrification system/the second denitrification system；

B, the first denitrification system/second denitrification system original process anoxic zone pool capacity is repartitioned, anoxic pond part pool capacity is changed It makes as aerobic decarburization pond, part bottom of pond is transformed and adds aerator, increase aerobic decarburization pond outlet pipe in aerobic decarburization pond end Road, the aerobic decarburization pond outlet pipeline other end connect sedimentation basin, and former sedimentation basin water outlet is reduced certain altitude, so that aerobic de- The water outlet of carbon pond can be left to sedimentation basin certainly；

C, water passage between aerobic decarburization pond and aerobic tank is closed, so that the water outlet of aerobic decarburization pond can not flow automatically to aerobic Pond；

D, aerobic tank is divided into three parts, respectively the first autotrophic denitrification pond, the second autotrophic denitrification pond, aerobic nitrification pond, each pond Increase partition between body, the mouth of a river was added on partition, and intercept sieve crossing to increase in front of the mouth of a river, and increased in aerobic tank water inlet end The other end of first autotrophic denitrification pond inlet pipeline, the first autotrophic denitrification pond inlet pipeline connects sedimentation basin end；

E, total outlet pipe road is set in degassing pond, total outlet pipe road reduces certain altitude compared with sedimentation basin water outlet, so that sedimentation basin Water outlet can flow to the first autotrophic denitrification pond certainly；Separately set tail water reflux unit in degassing Chi Chu, the tail water reflux unit it is another First autotrophic denitrification pond of another group of denitrification system of end connection.