CN101746931A - Denitrification dephosphorization biological treatment and filtration integral sewage treatment system and method thereof - Google Patents
Denitrification dephosphorization biological treatment and filtration integral sewage treatment system and method thereof Download PDFInfo
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- 238000001914 filtration Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 46
- 239000010865 sewage Substances 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000006243 chemical reaction Methods 0.000 claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 230000008569 process Effects 0.000 claims abstract description 30
- 238000000926 separation method Methods 0.000 claims abstract description 30
- 238000005273 aeration Methods 0.000 claims abstract description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 14
- 229910052698 phosphorus Inorganic materials 0.000 claims description 14
- 239000011574 phosphorus Substances 0.000 claims description 14
- 238000005276 aerator Methods 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 238000006396 nitration reaction Methods 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 5
- XDDAORKBJWWYJS-UHFFFAOYSA-N glyphosate Chemical compound OC(=O)CNCP(O)(O)=O XDDAORKBJWWYJS-UHFFFAOYSA-N 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 3
- 238000011001 backwashing Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 3
- 239000010802 sludge Substances 0.000 description 32
- 238000010992 reflux Methods 0.000 description 10
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- 238000005516 engineering process Methods 0.000 description 6
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- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention provides a denitrification dephosphorization biological treatment and filtration integral sewage treatment system, which sequentially comprises a reaction tank, an aerobic main aeration tank, an aerobic solid-liquid separation tank and a filtering tank in the sewage flow direction, wherein the aerobic solid-liquid separation tank is provided with a three-phase separator, is respectively connected with the reaction tank and the aerobic main aeration tank through pipelines, and is used for providing back flowing mud. Through the organic combination of the biological treatment and the filtering process, the invention fully utilizes the high-efficient solid-liquid separation capability of the filtering process for ensuring that the biological treatment tank can reach higher mud concentration, the size of the reaction tank can be reduced, and indexes such as suspended substances in outlet water and the like can reach higher standard through filtration.
Description
Technical field
The present invention relates to sewage disposal technology, specifically, relate to the Sewage treatment systems and the method thereof of a kind of nitrogen and phosphorus removal bio processing and filtering integral.
Background technology
Biological treatment is a most popular treatment process in the sewage disposal, and this art breading efficient height is stable, is city's main flow technology that industrial sewage handles of having stable political situation.
Microorganism concn has only 2-4g/L in the conventional biological treatment reaction tank, and the structures volume is bigger, the construction investment height.How improving the microorganism concn in the biological treatment tank, is a main direction improving biological treatment.At present, the mode that improves microorganism concn in the biological treatment tank mainly contains two kinds, and the one, add biologic packing material, adopt this mode, sludge concentration can improve 1-5g/L in the aerobic reaction pond, to organic degraded, particularly nitration reaction all has very big benefit, and the pond holds can dwindle 1/3-1/2.Another kind of mode is to adopt membrane bioreactor, holds back the microorganism that takes away with water outlet to greatest extent, improves the sludge concentration in the reactor.In the membrane bioreactor, sludge concentration can reach about 10g/L usually, can save subsequent processes such as second pond and filtration, simplifies the sewage disposal flow process.But the membrane bioreactor construction investment is higher, and operation energy consumption is much higher than conventional treatment process, and the membrane module life-span is shorter, the running maintenance more complicated; These problems to a certain extent, have limited applying of membrane bioreactor.How adopting a kind of economical and practical mode to improve the biological reaction tank sludge concentration, is a main direction improving bio-reactor.
Filtration is the core process of advanced treatment of wastewater.In recent years, the sewage disposal plant effluent emission standard improves constantly, and makes to filter to widely apply in sewage treatment process, and filtration process process and equipment have all had significant improvement.Main filtered version has several classes such as traditional filtering, mechanical filter.Compare characteristics such as filtering technique has reduced investment, floor space is few and running cost is low with other technologies.Direct filtration or coagulation-precipitation-filtration are the advanced treatment process that the municipal wastewater treatment plant of developed country generally adopts.Common filter tank comprises normal sands filter tank, mobile cover filter tank, V-type filter tank, T type filter tank, D type filter tank etc.There is following shortcoming in tradition sand filtration technology: floor space is big, investment is high, energy consumption is high, the operational management more complicated; Sometimes for preventing to grow algae, the sand filtration system also need increase the prechlorination device.
The disc filter of amber Rodisc and siemens Disk Filter is the new type of high efficiency filter that development in recent years is got up, this class strainer floor space is little, filtering velocity is high, filtering accuracy is higher, but weak point is back flushing, and required pressure is higher, causes working cost higher.The textile material filtering technique adopts the fabric medium as filtration medium, fiber filter equipment has advantages such as head loss is few, auxiliary facility is few, take up an area of less, working cost is low, therefore, on the basis of former B-grade sewage treatment plant, remodel and expand and become simple, running maintenance is also more simple and convenient.
Novel filter plant volume is little, and operation level of automation height can bear the high processing load.In traditional biological treatment, the biological reaction tank sludge concentration mainly refluxes by precipitating sludge and guarantees, the present invention adopts the aerobic-filtration integrated metallization processes that guarantees the Aerobic Pond sludge concentration with filtration process, outstanding effect of filtering in integrated artistic, weaken precipitation process, in the hope of shortened process, reduce construction investment, and improve the effluent quality standard.
Summary of the invention
The Sewage treatment systems that the purpose of this invention is to provide a kind of nitrogen and phosphorus removal bio processing and filtering integral, it makes full use of the efficient solid-liquid separation capability of filtering basin and guarantees that Aerobic Pond reaches higher sludge concentration, dwindle reaction tank and hold, and use index such as water suspension by filtration and reach higher standard.
Another object of the present invention provides the sewage water treatment method of a kind of nitrogen and phosphorus removal bio processing and filtering integral, and it has shortened flow process, reduces reactor volume, reduces construction investment.
In order to realize the object of the invention, the invention provides the Sewage treatment systems of a kind of nitrogen and phosphorus removal bio processing and filtering integral, by effluent stream to comprising successively: reaction tank, aerobic main aeration tank, be provided with the aerobic solid-liquid separation tank and the filtering basin of triphase separator, described aerobic solid-liquid separation tank links to each other by pipeline with described reaction tank, described aerobic main aeration tank respectively, is used to provide returned sluge.
Wherein, described reaction tank is anoxic pond or anaerobism anoxic pond.Described anaerobism anoxic pond is made up of anaerobic pond and anoxic pond.
Be provided with agitator in the described reaction tank.
Plug-flow or complete mixing pit type are adopted in described aerobic main aeration tank.
In the described aerobic main aeration tank aerator is set.
In the described aerobic solid-liquid separation tank aerator is set.
Surface-type strainer and aerator are set in the described filtering basin.
The filtration medium of described surface-type strainer can adopt fiber medium, also can adopt metal medium, and surface load is 5-10m/h.
Described surface-type strainer also links to each other by pipeline with described reaction tank, provides back suction soil pick-up water to reaction tank.
Sewage treatment systems of the present invention also comprises grid treating pond and settling pit before reaction tank.
In order to realize another object of the present invention, a kind of nitrogen and phosphorus removal bio of the present invention is handled and the sewage water treatment method of filtering integral, and it may further comprise the steps:
1) sewage is introduced into reaction tank, mixes with returned sluge from aerobic solid-liquid separation tank, finishes anaerobic phosphorus release and denitrification process;
2) water outlet of reaction tank enters Aerobic Pond master aeration tank again, finishes oxidation operation and nitrifying process;
3) water outlet of Aerobic Pond master aeration tank enters the Aerobic Pond solid-liquid separation tank, continues to finish nitration reaction, and finishes preliminary gas, liquid, solid sepn process by triphase separator; Returned sluge is back to reaction tank from aerobic solid-liquid separation tank;
4) water outlet of Aerobic Pond solid-liquid separation tank enters the filtering basin filtration and discharges, and filters backwashing water and is back to reaction tank.
Wherein, in the step 1), by ORP (redox potential) value in flooded condition and the reaction tank I and sludge concentration control quantity of reflux, HRT (hydraulic detention time) is 1-1.5h.Returned sluge and water inlet ratio are 100-300%.
Step 2) in the aerobic main aeration tank aerator 7 is set in, and carries out online DO observing and controlling, control DO concentration is between 2-4.
In the step 3), described triphase separator can calculate according to general anaerobic UASB (upflow anaerobic sludge blanket process) reactor, the flow velocity 1-4m/h that rises overally (realizing by control flooding quantity and the measure of increase water conservancy diversion).Control water outlet SS (suspended substance) is about 50mg/L.Returned sluge and excess sludge are all discharged from this Aerobic Pond solid-liquid separation tank.In this reactor, progressively finish granular sludge, form aerobic bacteria at skin, amphimicrobe and anerobe are realized synchronous nitration and denitrification in the structure of internal layer.
In the step 4), filter and adopt mechanical surface strainer (such as the surface-type strainer), filtering velocity 1-10m/h continues aeration in the filtration procedure, to increase filtration medium surface liquid flow velocity, avoid blocking filter.According to the liquid level difference Data Control backwash process of gathering, strainer regularly or carry out back flushing, the suction principle is adopted in back flushing, utilize the back suction sucking pump to carry out back flushing with filter back water, discharge the filtering basin deposition simultaneously, the bottom, filter tank is provided with shore pipe, utilizes back suction sucking pump spoil disposal.
In the step 4), the remaining active sludge in the Aerobic Pond solid-liquid separation tank also can regularly discharge by pipeline.
Sewage comprises also described sewage is carried out pre-treatment that described pre-treatment comprises that grid is handled and settling pit is handled before entering reaction tank; Adopt grid from sewage, to remove the thicker suspended substance that may stop up water pump assembly and pipeline valve, and guarantee that the subsequent disposal facility can normally move; Adopt settling pit from sewage, to remove the bigger particles of proportion such as sand, cinder, in order to avoid the normal operation of these impurity effect subsequent disposal structures.
Compared with prior art, technical scheme of the present invention has following advantage:
1) shortens flow process, reduce reactor volume, reduce construction investment: traditional denitrification dephosphorization technique generally comprises technological processs such as anaerobism, anoxic, aerobic, precipitation, filtration, flow process is longer, the settling tank that adopts in the big-and-middle-sized engineering is normally circular, can't build jointly with other structures, makes that each structures must the split construction, floor space is bigger, and construction investment is higher.The present invention adopts the three phase separation technology generation for precipitation, utilizes filtering technique to realize final solid-liquid separation, shortens technological process, reduces structures quantity, reduces construction investment.On the other hand,, can improve the sludge quantity in the bio-reactor greatly, improve speed of response, dwindle reactor volume owing to do not need to rely on returned sluge to guarantee the sludge concentration that bio-reactor is interior.
2) compare with the method that adds filler and increase the biological reaction tank sludge concentration, save the biologic packing material investment, avoided the managerial problem of stuffing operation, need not improve in the biological tank DO concentration (dissolved oxygen concentration) and keep the biological treatment operation, save energy consumption.
3) finally adopt filtering technique to realize solid-liquid separation, effluent quality is good, and to general municipal effluent, water outlet can reach " urban wastewater treatment firm pollution discharge standard " one-level A standard.
4) adopt triphase separator in the biological tank, up-flow speed is higher, helps the discharge section floc sludge, progressively realizes granular sludge, further improves sludge concentration, strengthens the synchronous nitration and denitrification effect, improves the TN clearance.
Description of drawings
Fig. 1 is the schema of the Sewage treatment systems of nitrogen and phosphorus removal bio processing of the present invention and filtering integral.
Fig. 2 is the structural representation of anaerobism anoxic pond of the present invention.
Among the figure:
I anoxic or II Aerobic Pond master aeration tank, anaerobism hypoxia response pond
III Aerobic Pond solid-liquid separation tank IV filtering basin
1 water inlet of V outlet sump
2 water outlets, 3 pressurized air
4 excess sludges, 5 returned sluges
6 agitators, 7 aerators
8 triphase separators, 9 surface-type strainers
10 return sludge pumps, 11 residual sludge pump
12 valves, 13 effluent weirs
14 reflux pumps, 15 back suction soil pick-up water
Embodiment
Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
Embodiment 1
As shown in Figure 1, nitrogen and phosphorus removal bio of the present invention is handled the sewage water treatment method with filtering integral, its treating processes is: raw waste water 1 at first enters reaction tank I, and according to influent quality and water outlet requirement, reaction tank I can be set to independent anoxic pond or anaerobism and anoxic pond.Agitator 6 is set in reaction tank I, finish denitrification and anaerobic phosphorus release process after, enter aerobic main aeration tank II, finish organic matter degradation and nitrifying process, then enter aerobic solid-liquid separation tank III.At aerobic solid-liquid separation tank III, triphase separator 8 is set, mud mixed liquid utilizes triphase separator, finish preliminary solid-liquid separation process, supernatant liquor enters filtering basin IV, further finishes the fine filtering process in filtering basin IV, make water outlet reach emission standard, enter outlet sump V, final discharging.Mud internal reflux pump 10 is set, finishes from aerobic solid-liquid separation tank III to reaction tank I and the backflow of the mud of aerobic main aeration tank II, guarantee the reaction tank sludge concentration, realize denitrification and dephosphorization.Residual sludge pump 11 is set, finishes the excess sludge discharge process, guarantee suitable sludge age and sludge concentration.
A kind of nitrogen and phosphorus removal bio of the present invention is handled the Sewage treatment systems with filtering integral, comprises as follows successively:
1. reaction tank I
Reaction tank I can adopt two kinds of forms, separately anoxic pond or anaerobism anoxic pond.During separately as anoxic pond, raw waste water and returned sluge enter reaction tank I simultaneously, reflux ratio 100-300%, and the residence time calculates according to influent concentration.During as the anaerobism anoxic pond, reaction tank I is divided into two lattice, and raw waste water 1 enters the first lattice I a anaerobic pond, and returned sluge 5 enters the second lattice I b anoxic pond, and second lattice are provided with internal reflux pump 14, and mud mixture is back to first lattice, see shown in Figure 2.Reaction tank I is provided with agitator 6a, 6b, and the form of agitator and power calculate according to the pond type, guarantees that muddy water mixes.
Online ORP instrument and sludge concentration meter are set, according to ORP value and sludge concentration value control returned sluge valve 12, control quantity of reflux in reaction tank I.HRT (hydraulic detention time) is 1-1.5h.
2. aerobic main aeration tank II
Aerobic main aeration tank II can adopt plug-flow or complete mixing pit type, and aerator 7 is set, and pressurized air 3 enters in the aeration tank through aerator 7.The residence time calculates according to water quality.Partial reflux mud enters aerobic main aeration tank II, guarantees sludge concentration.
Online DO instrument is set in the aerobic main aeration tank, and control DO concentration is between 2-4.
3. aerobic solid-liquid separation tank III
The guiding device (be located at the sidewall in pond on) of the mud mixture of aerobic main aeration tank II at the bottom of by the pond enters aerobic solid-liquid separation tank III, guarantee at pond cross direction water distribution even.The solid-liquid displacement zone upflow velocity is 1-4m/h, adopts triphase separator to carry out gas-liquid and separates admittedly, and triphase separator calculates with anaerobic reactor similar, and water outlet enters filtering basin IV through effluent weir 13.Aerobic solid-liquid displacement zone also is provided with aerator 7, continues to finish biological respinse.Return sludge pump 10 and residual sludge pump 11 are set at the bottom of the pond, and the mud quantity of reflux is the 100-300% of flooding quantity, and residual sludge pump is according to the water quality calculated flow rate.
Online DO instrument is set in the aerobic solid-liquid displacement zone, and control DO concentration is between 2-4.
4. filtering basin IV
Surface-type strainer 9 is set in the filtering basin IV, and the water after the filtration is entered in the surface-type filter center pipe by the outside, flows to outlet sump.Along the surface-type strainer aerator is set in the filtering basin, strengthens surface-type filter surfaces liquid-flow by aeration, alleviate the surface-type filter surfaces and pollute, increase filtration cycle, aeration intensity is 2-4m
3/ m
2.h.Through filtering after a while, the surface-type filter surfaces has certain pollutent, causes filtering basin IV liquid level to increase, and starts the strainer back suction and inhales mechanism, carries out on-line cleaning.Surface-type strainer filtration medium can adopt fiber medium, also can adopt metal medium, surface load 5-10m/h.
In filtering basin IV, liquidometer is set, inhales process according to liquid level or time control back suction.Back suction soil pick-up water 15 is got back to reaction tank I or aerobic main aeration zone II.
5. outlet sump V
Filter the back water outlet and enter outlet sump V, discharging or reuse.
Equipment such as surface-type strainer involved in the present invention, aerator, agitator all can adopt equipment well known in the art.
The test example
With certain sanitary sewage disposal engineering is example, and the applicable cases that nitrogen and phosphorus removal bio of the present invention is handled with the Sewage treatment systems of filtering integral describes test.
Certain sewage disposal project is intake based on sanitary sewage water yield 1000m
3/ d.The water inlet Pollutant levels are as follows:
Table 1 Pollutant levels index
| Project | ??COD | ??BOD | ??SS | Ammonia nitrogen | ??TN | ??TP |
| Index | ??350 | ??150 | ??200 | ??35 | ??40 | ??4 |
Anoxic pond, aerobic main aeration tank and the total useful volume 520m of aerobic solid-liquid displacement zone
3, anoxic pond useful volume 104m wherein
3, 4 meters of the depth of waters, HRT2.5h, aerobic solid-liquid separation tank useful volume 104m
3, reflux ratio 150%, upflow velocity 4m/h, 4 meters of the depth of waters, aerobic main aeration zone useful volume 312m
3Filtering unit adopts fibre turntable strainer, 2 meters of filter disc diameters, 2 of quantity, effective filtration area 10.4m
2, filtering velocity 10m/h.After the each processing unit processing, treat effluent pollutent changing conditions is as follows:
Table 2 each processing unit water outlet situation
| Project | ?COD | ??BOD | ??SS | Ammonia nitrogen | ??TN | ??TP |
| Water inlet | ?350 | ??150 | ??200 | ??35 | ??40 | ??4 |
| The anoxic pond water outlet | ?180 | ??70 | ??- | ??14 | ??20 | ??2.2 |
| Aerobic solid-liquid displacement zone water outlet | ?60 | ??10 | ??30 | ??5 | ??20 | ??1.5 |
| Filter water outlet | ?50 | ??10 | ??10 | ??5 | ??20 | ??1 |
Wherein to go out water concentration relevant with carbon source for TN, and in this project, water outlet requires " urban wastewater treatment firm pollutant emission " one-level B standard, therefore do not consider additional carbon.Go out water concentration if require to continue to reduce TN, can consider to increase additional carbon, TN goes out water concentration and can be controlled at about 15mg/L.
Though above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements all belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.
Claims (10)
1. a nitrogen and phosphorus removal bio is handled and the Sewage treatment systems of filtering integral, it is characterized in that, by effluent stream to comprising successively: reaction tank, aerobic main aeration tank, be provided with the aerobic solid-liquid separation tank and the filtering basin of triphase separator, described aerobic solid-liquid separation tank links to each other by pipeline with described reaction tank, described aerobic main aeration tank respectively, is used to provide returned sluge.
2. Sewage treatment systems according to claim 1 is characterized in that, described reaction tank is anoxic pond or anaerobism anoxic pond.
3. Sewage treatment systems according to claim 1 and 2 is characterized in that, is provided with agitator in the described reaction tank.
4. according to any described Sewage treatment systems of claim 1-3, it is characterized in that, in the described aerobic main aeration tank, in the described aerobic solid-liquid separation tank aerator is set respectively.
5. according to any described Sewage treatment systems of claim 1-4, it is characterized in that, surface-type strainer and aerator are set in the described filtering basin.
6. according to the described Sewage treatment systems of claim 5, it is characterized in that the filtration medium of described surface-type strainer adopts fiber medium or adopts metal medium, surface load 5-10m/h.
7. according to any described Sewage treatment systems of claim 1-6, it is characterized in that described Sewage treatment systems also comprises grid treating pond and settling pit before reaction tank.
8. adopt the method for any described system handles sewage of claim 1-7, it is characterized in that it may further comprise the steps:
1) sewage is introduced into reaction tank, mixes with returned sluge from aerobic solid-liquid separation tank, carries out anaerobic phosphorus release and anti-nitration reaction;
2) water outlet of reaction tank enters Aerobic Pond master aeration tank again, finishes oxidation operation and nitration reaction;
3) water outlet of Aerobic Pond master aeration tank enters the Aerobic Pond solid-liquid separation tank, continues to finish nitration reaction, and finishes preliminary gas, liquid, solid sepn process by triphase separator; Returned sluge is back to reaction tank from aerobic solid-liquid separation tank;
4) water outlet of Aerobic Pond solid-liquid separation tank enters the filtering basin filtration and discharges, and filters backwashing water and is back to reaction tank.
9. sewage water treatment method according to claim 8 is characterized in that, in the step 1), the ratio of returned sluge and water inlet is 100-300%.
10. according to Claim 8 or 9 described sewage water treatment methods, it is characterized in that, in the step 3), the flow velocity 1-4m/h that rises overally of described triphase separator; In the step 4), filtering filtering velocity 1-10m/h.
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| CN101746931B CN101746931B (en) | 2012-08-15 |
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| CN104710084A (en) * | 2015-04-02 | 2015-06-17 | 四川省科学城天人环保有限公司 | High-efficiency biological membrane integrated sewage treatment device |
| CN106007178A (en) * | 2016-06-17 | 2016-10-12 | 阿斯旺（北京）环保科技有限公司 | Distributed and structured town sewage pelletization treatment process and pelletization reactor |
| CN108793599A (en) * | 2018-06-15 | 2018-11-13 | 中建三局第建设工程有限责任公司 | A kind of low-concentration organic wastewater processing system |
| CN109970193A (en) * | 2019-04-15 | 2019-07-05 | 浦华环保有限公司 | Enhanced type nitrogen rejection facility and equipment |
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