CN109052813A - A kind of land-saving high-efficient denitrification and dephosphorization sewage-treatment plant and method - Google Patents

A kind of land-saving high-efficient denitrification and dephosphorization sewage-treatment plant and method Download PDF

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CN109052813A
CN109052813A CN201810875644.3A CN201810875644A CN109052813A CN 109052813 A CN109052813 A CN 109052813A CN 201810875644 A CN201810875644 A CN 201810875644A CN 109052813 A CN109052813 A CN 109052813A
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tank
aerobic tank
left end
pond
level
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张进
王彬
轩盼盼
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Sichuan Tianrunde Environment Engineering Co ltd
Xinkai Water Environment Investment Co ltd
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Sichuan Tianrunde Environmental Engineering Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/04Disinfection
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/02Aerobic processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention discloses a kind of land-saving high-efficient denitrification and dephosphorization sewage-treatment plant and methods, including pretreatment unit, the left end of pretreatment unit is equipped with water inlet, the right end of pretreatment unit is connected to the left end of anaerobic pond, the right end of anaerobic pond is connected to the left end of level-one aerobic tank, the right end of level-one aerobic tank is connected to the left end of secondary settling tank, the right end of secondary settling tank is connected to the left end of anoxic pond, the right end of anoxic pond is connected to the left end of second level aerobic tank, the right end of second level aerobic tank is connected to the left end of advanced treatment unit, the right end of advanced treatment unit is equipped with water outlet, biofilm packing is filled in anoxic pond and second level aerobic tank.By traditional A/A/O process modification be the leading portion A/O using activated sludge process and the postposition A/O using pure biofilm is combined, the combination is for previous activated sludge process and mud film hybrid technique, while strengthening pollutant effect, occupied area has greatly been saved.

Description

A kind of land-saving high-efficient denitrification and dephosphorization sewage-treatment plant and method
Technical field
The present invention relates to technical field of sewage, it particularly relates at a kind of land-saving high-efficient denitrification and dephosphorization sewage Manage device and method.
Background technique
Control is global problem that is very intractable, costing dearly with improvement water eutrophication, referred to as ecological cancer. The mankind have reached common understanding to the basic reason for causing water eutrophication, i.e. the excessive emissions of the nutrients such as nitrogen phosphorus are most to close Key factor.Therefore, pollution sources are only cut off, eutrophication could be eradicated, realize the sustainable development of economy and society.A2/O refers to Anaerobic-anoxic-aerobic process.For essential meaning, this technique should be anaerobic- anoxic- oxic method, biological denitrification phosphorous removal technique Abbreviation, be widely used in domestic and international large size city sewage treatment plant as simplest synchronous denitrogen dephosphorus technology, however, The intrinsic shortcoming of A2/O technique is exactly nitrifier, denitrifying bacterium and polyP bacteria in sludge age, carbon source demand and returned sludge The nitrate of carrying influences polyP bacteria anaerobic phosphorus release etc., is difficult in triangular web while obtaining the efficient removal of nitrogen phosphorus.
For the influence for overcoming above-mentioned factor, there is scholar to combine activated sludge process and biofilm, using A2/O with The group technology of BAF/MBBR, BAF/MBBR refer to biological aerated filter/moving-bed biofilm reaction tank, by the dirt for shortening A2/O Sludge age separates nitrifying process from A2/O, is realized and is nitrified with BAF/MBBR, and A2/O is run under the conditions of short sludge age, For the purpose of dephosphorization and denitrification, and BAF/MBBR is run under the conditions of long sludge age, main to complete nitrification, is returned from BAF/MBBR The anoxic section that the nitrate that stream comes enters A2/O carries out anti-nitration reaction.The processing technological flow effectively raises denitrogenation dephosphorizing Effect, while more traditional A2/O process shrink biochemical reaction pool volume;But it is flowed out in the treatment process from BAF/MBBR Nitrate enters the anoxic section of A2/O with the reflux ratio of 200%-300%, significantly increases secondary settling tank surface loading, takes up an area face Product is multiplied.
Therefore, contradictory relation and drawback existing for prior art how are preferably solved and be handled, denitrogenation dephosphorizing effect is improved Fruit, starting sewage treatment technique that is efficient, saving land seems particularly necessary.
For the problems in the relevant technologies, currently no effective solution has been proposed.
Summary of the invention
For above-mentioned technical problem in the related technology, the present invention proposes a kind of land-saving high-efficient denitrification and dephosphorization sewage treatment Device and method is able to solve above-mentioned technical problem.
To realize the above-mentioned technical purpose, the technical scheme of the present invention is realized as follows:
A kind of land-saving high-efficient denitrification and dephosphorization sewage-treatment plant, including pretreatment unit, the left end of the pretreatment unit are set There is water inlet, the right end of the pretreatment unit is connected to the left end of anaerobic pond, the right end and level-one aerobic tank of the anaerobic pond Left end connection, the right end of the level-one aerobic tank is connected to the left end of secondary settling tank, the right end of the secondary settling tank and anoxic pond Left end connection, the right end of the anoxic pond are connected to the left end of second level aerobic tank, the right end and depth of the second level aerobic tank Manage the left end connection of unit, the right end of the advanced treatment unit is equipped with water outlet, in the anoxic pond and second level aerobic tank Filled with biofilm packing.
Further, the pretreatment unit includes grid pond, the right end of the grid pond and the left end of aerated grit chamber Connection, the right end of the aerated grit chamber are connected to the left end of conditioning tank, and the right end of the conditioning tank and the left end of anaerobic pond connect It is logical.
Further, the advanced treatment unit includes sedimentation basin, the left end of the sedimentation basin and the right side of second level aerobic tank End connection, the right end of the sedimentation basin are connected to the left end in filter tank, and the right end in the filter tank is connected to the left end of sterilization pool.
Further, the anoxic bottom of pond portion is equipped with the first aerator, is equipped with stirring on the upside of first aerator Device.
Further, the aerobic bottom of pond portion of the second level is equipped with the second aerator.
A kind of land-saving high-efficient denitrification and dephosphorization sewage water treatment method, comprising the following steps:
S1. sewage is introduced into pretreatment unit, carries out the adjusting of water quality and quantity, and removes biggish sand grains;
S2. enter anaerobic pond by pretreated water outlet, handle 1-1.5h;
S3. by anaerobic pond treated water outlet enter level-one aerobic tank, handle 2-3h;
S4. it is returned again by the level-one aerobic tank returned sludge that treated is discharged into secondary settling tank, by secondary settling tank processing generation It is back to anaerobic pond;
S5. by secondary settling tank, treated that water outlet enters anoxic pond, and the first biofilm packing is filled in the anoxic pond;
S6. by anoxic pond, treated that water outlet enters second level aerobic tank, and the second biology is also filled in the second level aerobic tank Film filler;
S7. by second level aerobic tank treated water outlet enter advanced treatment unit, after advanced treatment unit is handled, water Matter qualified discharge;By second level aerobic tank, treated that backflow mixed liquor again returns to anoxic pond.
Further, advanced treatment unit treatment process described in step S7 specifically includes the following steps:
S7.1. by second level aerobic tank treated water outlet enter efficient sedimentation tank carry out flocculation reaction further go dephosphorization;
S7.2. the water outlet by efficient sedimentation tank processing enters filter tank;
S7.3. the water outlet handled through filtering ponds enters sterilization pool.
Further, the first biofilm packing filling rate is 60-75% in the anoxic pond, the in the second level aerobic tank Two biofilm packing filling rates are 65-85%.
Further, entering in step S5 in anoxic pond treatment process further includes positive flushing, and the anoxic bottom of pond portion is set There is the first aerator, is equipped with agitating device on the upside of first aerator, the forward direction of the anoxic pond is flushed through unlatching First aerator simultaneously increases mixing speed realization, wherein the mixing speed is 70-110 revs/min, the forward direction of the anoxic pond Rinsing the frequency is to rinse within 1-2 days once, rinses duration 0.5-1h every time.
Further, entering in step S6 in second level aerobic tank treatment process further includes positive flushing, and the second level is aerobic Bottom of pond portion is equipped with the second aerator, and the forward direction of the second level aerobic tank, which is flushed through, opens the realization of the second aerator, described The positive frequency of rinsing of second level aerobic tank is that 5-7d flushing is primary, rinses duration 0.5-1h every time.
Beneficial effects of the present invention: 1. by traditional A/A/O process modification be using activated sludge process leading portion A/O with adopt It is combined with the postposition A/O of pure biofilm, the combination is for previous activated sludge process and mud film hybrid technique, strong While changing pollutant effect, occupied area has greatly been saved;
2. polyP bacteria suspension growth is grown on the life in postposition A/O with biofilm states in leading portion A/O processing unit, nitrifier On object film filler, the separation of the two solves the competition contradiction of polyP bacteria and nitrifier in traditional handicraft, and each is made all may be used It is grown in optimal environment, realizes system denitrogenation, the stability of dephosphorization, high efficiency and controllability.
3. the leading portion A/O residence time is short, nitration reaction does not occur substantially, is free of nitrate nitrogen in returned sludge, is anaerobism Section provides absolute anaerobic environment, is conducive to polyP bacteria and sufficiently releases phosphorus, greatly reduces advanced treatment unit chemical dephosphorization The dosage of medicament;
4. the high biofilm packing filling rate of postposition A/O reaction tank is up to 200-300mg/L to the tolerance of water inlet SS, reduces Requirement to secondary clarifier effluent concentration of suspension, improves the surface loading of secondary settling tank, occupied area decline;
5. the high biofilm packing filling rate in postposition A/O reaction tank, not only may act as filter, reduces the SS of water outlet, be not necessarily to Mud-water separation facility, while a stable living environment also is created for the growth of nitrobacteria and denitrifying bacteria, increase The biomass and bioactivity of microorganism, mass-transfer efficiency improve, and enhance the removal ability of pollutant;Meanwhile it is good to second level For oxygen pond, high fill-ratio biofilm packing increases the transfer efficiency of oxygen, and coefficient of oxygen utilization improves;
6. postposition A/O uses pure biomembrane process, the yield of excess sludge is greatly reduced.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings Obtain other attached drawings.
Fig. 1 is a kind of technique stream of the land-saving high-efficient denitrification and dephosphorization sewage water treatment method described according to embodiments of the present invention Cheng Tu;
Fig. 2 is a kind of structural representation of the land-saving high-efficient denitrification and dephosphorization sewage-treatment plant described according to embodiments of the present invention.
In figure: 1. grid ponds;2. anaerobic pond;3. level-one aerobic tank;4. secondary settling tank;5. anoxic pond;6. second level is aerobic Pond;7. aerated grit chamber;8. conditioning tank.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art's every other embodiment obtained belong to what the present invention protected Range.
As shown in Figs. 1-2, a kind of land-saving high-efficient denitrification and dephosphorization sewage-treatment plant according to embodiments of the present invention, Including pretreatment unit, the left end of the pretreatment unit is equipped with water inlet, right end and the anaerobic pond 2 of the pretreatment unit Left end connection, the right end of the anaerobic pond 2 are connected to the left end of level-one aerobic tank 3, and the right end of the level-one aerobic tank 3 and two sinks The left end in pond 4 is connected to, and the right end of the secondary settling tank 4 is connected to the left end of anoxic pond 5, and the right end and second level of the anoxic pond 5 are good The left end in oxygen pond 6 is connected to, and the right end of the second level aerobic tank 6 is connected to the left end of advanced treatment unit, the advanced treating list The right end of member is equipped with water outlet, is filled with biofilm packing in the anoxic pond 5 and second level aerobic tank 6.
The pretreatment unit includes grid pond 1, and the right end of the grid pond 1 is connected to the left end of aerated grit chamber 7, institute The right end for stating aerated grit chamber 7 is connected to the left end of conditioning tank 8, and the right end of the conditioning tank 8 is connected to the left end of anaerobic pond 2.
The advanced treatment unit includes sedimentation basin, and the left end of the sedimentation basin is connected to the right end of second level aerobic tank 6, institute The right end for stating sedimentation basin is connected to the left end in filter tank, and the right end in the filter tank is connected to the left end of sterilization pool.
5 bottom of anoxic pond is equipped with the first aerator, is equipped with agitating device on the upside of first aerator.
6 bottom of second level aerobic tank is equipped with the second aerator.
A kind of land-saving high-efficient denitrification and dephosphorization sewage water treatment method, comprising the following steps:
S1. sewage is introduced into pretreatment unit, carries out the adjusting of water quality and quantity, and removes biggish sand grains;
S2. enter anaerobic pond 2 by pretreated water outlet, handle 1-1.5h;
S3. by anaerobic pond 2 treated water outlet enter level-one aerobic tank 3, handle 2-3h;
S4. by level-one aerobic tank 3 treated water outlet enter secondary settling tank 4, by secondary settling tank 4 handle generate returned sludge It returns again to anaerobic pond 2;
S5. by secondary settling tank 4, treated that water outlet enters anoxic pond 5, is filled with the first biofilm packing in the anoxic pond 5;
S6. by anoxic pond 5, treated that water outlet enters second level aerobic tank 6, and it is raw that second is also filled in the second level aerobic tank 6 Object film filler;
S7. by second level aerobic tank 6 treated water outlet enter advanced treatment unit, after advanced treatment unit is handled, water Matter qualified discharge;By second level aerobic tank 6, treated that backflow mixed liquor again returns to anoxic pond 5.
Advanced treatment unit treatment process described in step S7 specifically includes the following steps:
S7.1. by second level aerobic tank 6 treated water outlet enter efficient sedimentation tank carry out flocculation reaction further go dephosphorization;
S7.2. the water outlet by efficient sedimentation tank processing enters filter tank;
S7.3. the water outlet handled through filtering ponds enters sterilization pool.
First biofilm packing filling rate is 60-75%, the second biomembrane in the second level aerobic tank 6 in the anoxic pond 5 Media-filling rate is 65-85%.
Entering in 5 treatment process of anoxic pond in step S5 further includes positive flushing, and 5 bottom of anoxic pond is equipped with first and exposes Device of air, the first aerator upside are equipped with agitating device, and the forward direction of the anoxic pond 5 is flushed through the first aeration of unlatching Device simultaneously increases mixing speed realization, wherein the mixing speed is 70-110 revs/min, the positive of the anoxic pond 5 rinses frequency It is secondary that primary, each flushing duration 0.5-1h was rinsed for 1-2 days.
Entering in 6 treatment process of second level aerobic tank in step S6 further includes positive flushing, and 6 bottom of second level aerobic tank is set There is the second aerator, the forward direction of the second level aerobic tank 6, which is flushed through, opens the realization of the second aerator, and the second level is aerobic The positive frequency of rinsing in pond 6 is that 5-7d flushing is primary, rinses duration 0.5-1h every time.
In order to facilitate understanding above-mentioned technical proposal of the invention, below by way of in specifically used mode to of the invention above-mentioned Technical solution is described in detail.
When specifically used, a kind of land-saving high-efficient denitrification and dephosphorization sewage-treatment plant according to the present invention, including Pretreatment unit, the pretreatment unit include grid pond 1, conditioning tank 8, aerated grit chamber 7.The left end of the pretreatment unit Equipped with water inlet, the right end of the pretreatment unit is connected to the left end of anaerobic pond 2, and the right end and level-one of the anaerobic pond 2 are good The left end in oxygen pond 3 is connected to, and the right end of the level-one aerobic tank 3 is connected to the left end of secondary settling tank 4, the right end of the secondary settling tank 4 and The left end of anoxic pond 5 is connected to, and the right end of the anoxic pond 5 is connected to the left end of second level aerobic tank 6, and 5 bottom of anoxic pond is equipped with the One aerator, the first aerator upside are equipped with agitating device, the right end and advanced treating list of the second level aerobic tank 6 The left end connection of member, 6 bottom of second level aerobic tank is equipped with the second aerator.The right end of the advanced treatment unit is equipped with The mouth of a river, advanced treatment unit include the sedimentation basin being sequentially communicated, filter tank, sterilization pool, in the anoxic pond 5 and second level aerobic tank 6 It is filled with biofilm packing.
A kind of land-saving high-efficient denitrification and dephosphorization sewage water treatment method, main process flow are as follows: water inlet, pretreatment, leading portion A/O Reaction tank anaerobic pond, level-one aerobic tank, secondary settling tank, postposition A/O reaction tank anoxic pond, second level aerobic tank, advanced treating, water outlet.
Specifically includes the following steps:
S1. sewage is introduced into pretreatment unit, and sewage enters from the water inlet of pretreatment unit, and sewage is mainly sanitary sewage, Pretreatment unit includes the heavy pond for the first time grid pond 1, conditioning tank 8, aerated grit chamber 7(), in the grid pond 1 and exposure of pretreatment unit Gas setting pot 7 removes biggish sand grains, carries out the adjusting of water quality and quantity in conditioning tank 8;
S2. enter anaerobic pond 2 by pretreated water outlet, handle 1-1.5h;2 major function of anaerobic pond is release phosphorus.It is former dirty Water is synchronous with returned sludge to enter anaerobism section, and amphimicrobian zymophyte synthesizes PHA using dissolved organic matter and is stored in cell It is interior, while hardly degraded organic substance is converted into small-molecule substance, intracellular polyphosphoric acid is hydrolyzed to orthophosphates, is discharged into water In.
S3. by anaerobic pond 2 treated water outlet enter level-one aerobic tank 3, handle 2-3h;The main function of level-one aerobic tank 3 It can be removal bod BOD, absorption phosphorus.The polyhydroxyalkanoates that store in polyP bacteria decomposer obtain energy For itself growth and breeding, while excess is absorbed the dissolubility P in water and is stored in the form of Quadrafos in vivo, by precipitating, Phosphorous high sludge is separated from the water out, achievees the effect that dephosphorization.
Step S2, S3 is leading portion A/O reaction tank anaerobic pond, level-one aerobic tank, utilizes polyP bacteria anaerobic phosphorus release, aerobic phosphorus absorption The characteristics of, polyP bacteria is directly entered the higher aerobic section of biochemical efficiency, the suction formed under anaerobic state after anaerobic phosphorus release Phosphorus power can be made full use of, and the dephosphorization ability of system is improved.
S4. by level-one aerobic tank 3 treated water outlet enter secondary settling tank 4, by secondary settling tank 4 handle generate reflux Sludge is returned again to anaerobic pond 2;4 main function mud-water separation of secondary settling tank, and returned sludge is provided for leading portion A/O.Surface loading 1.8-2.0m³/㎡▪h。
S5. by secondary settling tank 4, treated that water outlet enters anoxic pond 5, fills out in the anoxic pond 5 filled with the first biomembrane Material;Secondary settling tank 4, which is discharged and enters anoxic pond 5 from the nitrate that level-one aerobic tank 3 flows back, carries out anti-nitration reaction, the first biomembrane Nitrate nitrogen denitrification is that nitrogen or nitrous oxide are removed from water body by carbon source of organic matter by the microorganism of filler surface. First biofilm packing filling rate is 60-75%, and 5 bottom of anoxic pond is provided with blender and the first aerator, when aqueous suspension out Object SS > 50-70mg/L opens the first aerator, and increases agitator speed, and mixing speed is 70-110 revs/min, makes the One biofilm packing is in flow regime, and positive flushing is carried out to it, and the first biofilm packing is collided between each other to go Except the excessive microorganism in surface.Rinsing the frequency is that 1-2d is rinsed once, rinses duration 0.5-1h every time, water outlet is directly entered depth Processing unit, entire sewage disposal process are normally carried out.
S6. by anoxic pond 5, treated that water outlet enters second level aerobic tank 6, and the is also filled in the second level aerobic tank 6 Two biofilm packings;The water outlet of anoxic pond 5 enters second level aerobic tank 6, and second biofilm packing surface is micro- in second level aerobic tank 6 Biological flora is mainly nitrobacteria, is nitrate nitrogen by mineralized nitrogen, while partial organic substances are under the action of aerobic microbiological The inorganic matters such as carbon dioxide and water are decomposed into be removed.Second biofilm packing filling rate is 65-85%, the first biofilm packing Identical biofilm packing is used with the second biofilm packing, by increasing the aeration intensity of the second aerator, it is carried out Forward direction is rinsed, and is in the second biofilm packing and is moved freely state, collided between each other, surface excess microorganisms are de- It falls, enters next processing unit with flushing water;Being rinsed the frequency is that 5-7d is rinsed once, rinses duration 0.5-1h every time, whole A sewage disposal process is normally carried out.Step S5, S6 is postposition A/O reaction tank anoxic pond, second level aerobic tank.
S7. by second level aerobic tank 6 treated water outlet enter advanced treatment unit, handled by advanced treatment unit Afterwards, water quality reaching standard discharges;By second level aerobic tank 6, treated that backflow mixed liquor again returns to anoxic pond 5.It is good by second level Treated in oxygen pond 6, and efficient sedimentation tank, filter tank, sterilization pool are successively passed through in water outlet, in efficient sedimentation tank by flocculation reaction into One step dephosphorization, while reducing influence of the suspended matter to filter tank in flushing water;The microorganism on filter tank surface is further strengthened in water The removal of pollutant.
Water outlet, sterilization pool water outlet gravity flow enter total row's mouth.Treated, and pollutants removal rate has higher level, chemistry consumption Oxygen amount COD total removal rate was up to biochemical oxygen demand (BOD) BOD on the 92nd~98%, 55Total removal rate is up to 95~99%, ammonia nitrogen total removal rate Up to 95% or more, total phosphorus TP total removal rate is up to 95% or more, and ss suspended solid total removal rate is up to 99% or more.Effluent quality reaches IV class standard of grass root's " water environment quality standard GB3838-2002 ".
In conclusion being dirty using activity by traditional A/A/O process modification by means of above-mentioned technical proposal of the invention The leading portion A/O of mud method and the postposition A/O combination for using pure biofilm, the combination is compared to previous activated sludge process and mud film For hybrid technique, while strengthening pollutant effect, occupied area has greatly been saved;PolyP bacteria suspension growth is in leading portion A/O processing unit, nitrifier are grown on the biofilm packing in postposition A/O with biofilm states, and the separation of the two solves The competition contradiction of polyP bacteria and nitrifier in traditional handicraft, grow each can all in optimal environment, realizes and is System denitrogenation, the stability of dephosphorization, high efficiency and controllability.The leading portion A/O residence time is short, and nitration reaction does not occur substantially, reflux Nitrate nitrogen is free of in sludge, and absolute anaerobic environment is provided for anaerobism section, is conducive to polyP bacteria and sufficiently releases phosphorus, greatly subtract The dosage of advanced treatment unit chemical dephosphorization medicament is lacked;The high biofilm packing filling rate of postposition A/O reaction tank, to water inlet SS Tolerance be up to 200-300mg/L, reduce the requirement to secondary clarifier effluent concentration of suspension, keep the surface of secondary settling tank negative Lotus is improved, occupied area decline;High biofilm packing filling rate in postposition A/O reaction tank, not only may act as filter, reduce The SS of water outlet is not necessarily to mud-water separation facility, at the same also for nitrobacteria and denitrifying bacteria growth create one it is stable Living environment increases the biomass and bioactivity of microorganism, and mass-transfer efficiency improves, and enhances the removal ability of pollutant; Meanwhile for second level aerobic tank, high fill-ratio biofilm packing increases the transfer efficiency of oxygen, and coefficient of oxygen utilization improves;Afterwards A/O is set using pure biomembrane process, greatly reduces the yield of excess sludge.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of land-saving high-efficient denitrification and dephosphorization sewage-treatment plant, which is characterized in that including pretreatment unit, the pretreatment The left end of unit is equipped with water inlet, and the right end of the pretreatment unit is connected to the left end of anaerobic pond (2), the anaerobic pond (2) Right end be connected to the left end of level-one aerobic tank (3), the right end of the level-one aerobic tank (3) is connected to the left end of secondary settling tank (4), The right end of the secondary settling tank (4) is connected to the left end of anoxic pond (5), right end and second level aerobic tank (6) of the anoxic pond (5) Left end connection, the right end of the second level aerobic tank (6) are connected to the left end of advanced treatment unit, the right side of the advanced treatment unit End is equipped with water outlet, is filled with biofilm packing in the anoxic pond (5) and second level aerobic tank (6).
2. a kind of land-saving high-efficient denitrification and dephosphorization sewage-treatment plant according to claim 1, which is characterized in that the pre- place Managing unit includes grid pond (1), and the right end of the grid pond (1) is connected to the left end of aerated grit chamber (7), the sediment by aeration The right end in pond (7) is connected to the left end of conditioning tank (8), and the right end of the conditioning tank (8) is connected to the left end of anaerobic pond (2).
3. a kind of land-saving high-efficient denitrification and dephosphorization sewage-treatment plant according to claim 1, which is characterized in that the depth Processing unit includes sedimentation basin, and the left end of the sedimentation basin is connected to the right end of second level aerobic tank (6), the right end of the sedimentation basin It is connected to the left end in filter tank, the right end in the filter tank is connected to the left end of sterilization pool.
4. a kind of land-saving high-efficient denitrification and dephosphorization sewage-treatment plant according to claim 1, which is characterized in that the anoxic Pond (5) bottom is equipped with the first aerator, is equipped with agitating device on the upside of first aerator.
5. a kind of land-saving high-efficient denitrification and dephosphorization sewage-treatment plant according to claim 1, which is characterized in that the second level Aerobic tank (6) bottom is equipped with the second aerator.
6. a kind of land-saving high-efficient denitrification and dephosphorization sewage water treatment method, which comprises the following steps:
S1. sewage is introduced into pretreatment unit, carries out the adjusting of water quality and quantity, and removes biggish sand grains;
S2. enter anaerobic pond (2) by pretreated water outlet, handle 1-1.5h;
S3. by anaerobic pond (2) treated, water outlet enters level-one aerobic tank (3), handles 2-3h;
S4. by level-one aerobic tank (3) treated, water outlet enters secondary settling tank (4), returns by what secondary settling tank (4) processing generated Stream sludge is returned again to anaerobic pond (2);
S5. by secondary settling tank (4) treated, water outlet enters anoxic pond (5), and the first biomembrane is filled in the anoxic pond (5) Filler;
S6. by anoxic pond (5) treated, water outlet enters second level aerobic tank (6), is also filled in the second level aerobic tank (6) Second biofilm packing;
S7. by second level aerobic tank (6) treated, water outlet enters advanced treatment unit, after advanced treatment unit is handled, Water quality reaching standard discharge;By second level aerobic tank (6), treated that backflow mixed liquor again returns to anoxic pond (5).
7. a kind of land-saving high-efficient denitrification and dephosphorization sewage water treatment method according to claim 6, which is characterized in that step S7 The advanced treatment unit treatment process specifically includes the following steps:
S7.1. by second level aerobic tank (6) treated, water outlet enters efficient sedimentation tank carries out flocculation reaction and further remove Phosphorus;
S7.2. the water outlet by efficient sedimentation tank processing enters filter tank;
S7.3. the water outlet handled through filtering ponds enters sterilization pool.
8. a kind of land-saving high-efficient denitrification and dephosphorization sewage water treatment method according to claim 6, which is characterized in that described to lack The first biofilm packing filling rate is 60-75%, the second biofilm packing filling rate in the second level aerobic tank (6) in oxygen pond (5) For 65-85%.
9. a kind of land-saving high-efficient denitrification and dephosphorization sewage water treatment method according to claim 6, which is characterized in that step S5 It further include positive flushing in middle entrance anoxic pond (5) treatment process, anoxic pond (5) bottom is equipped with the first aerator, institute It states and is equipped with agitating device on the upside of the first aerator, the forward direction of the anoxic pond (5), which is flushed through, opens the first aerator simultaneously Increase mixing speed to realize, wherein the mixing speed is 70-110 revs/min, the positive frequency of rinsing of the anoxic pond (5) is Rinse within 1-2 days primary, each flushing duration 0.5-1h.
10. a kind of land-saving high-efficient denitrification and dephosphorization sewage water treatment method according to claim 6, which is characterized in that step Entering in second level aerobic tank (6) treatment process in S6 further includes positive flushing, and second level aerobic tank (6) bottom is equipped with second and exposes Device of air, the forward direction of the second level aerobic tank (6), which is flushed through, opens the realization of the second aerator, the second level aerobic tank (6) It is positive rinse the frequency to be that 5-7d is rinsed primary, rinse duration 0.5-1h every time.
CN201810875644.3A 2018-08-03 2018-08-03 A kind of land-saving high-efficient denitrification and dephosphorization sewage-treatment plant and method Pending CN109052813A (en)

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