CN208980419U - High-efficient denitrification and dephosphorization system associated with a kind of biological clarification tank and biofilter - Google Patents
High-efficient denitrification and dephosphorization system associated with a kind of biological clarification tank and biofilter Download PDFInfo
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- CN208980419U CN208980419U CN201821445889.4U CN201821445889U CN208980419U CN 208980419 U CN208980419 U CN 208980419U CN 201821445889 U CN201821445889 U CN 201821445889U CN 208980419 U CN208980419 U CN 208980419U
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- biological clarification
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Abstract
The utility model discloses high-efficient denitrification and dephosphorization systems associated with a kind of biological clarification tank and biofilter, including biological clarification tank, biological aerated filter and denitrification bio-filter, the biological clarification tank include anaerobic zone, anoxic zone, aerobic zone and settling section.Biological clarification tank is the technique for integrating biochemical action and precipitation in the system, and sludge concentration is high, compact-sized；Meanwhile organically by activated sludge process in conjunction with biofilm, high-efficient denitrification and dephosphorization can be realized, have occupied area small, the residence time is short, suitable for the denitrogenation dephosphorizing of sewage, is particularly suitable for sewage plant and proposes mark transformation project.
Description
Technical field
The present invention relates to sewage treatment field, specifically a kind of high-efficient denitrification and dephosphorization system.
Background technique
To implement " Law of the People's Republic of China on the Prevention and Control of Water Pollution ", reinforce the pipe built and run to urban wastewater treatment firm
Reason improves cities and towns quality of water environment, and State Environmental Protection Administration is in publication in 2006 on May 8, " urban wastewater treatment firm
Pollutant emission standard " (GB18918-2002) revision, revision since the date of issuance implemented.After modification is promulgated, China
The discharge standard of town sewage plant is changed to " town sewage plant pollutant emission standard GB18918-2002 " (level-one A), in addition
The eutrophication of rivers and lakes after preventing sewage discharge and the water intaking water quality for ensuring downstream tap water water factory source water, it is desirable to from dirt
The water quality of water factory's draining reaches the water standard of four class water.Then, Beijing discloses " water pollutant comprehensive discharge standard "
(DB11/307-2013), Tianjin publication " urban wastewater treatment firm pollution discharge standard " (DB12599-2015), 2017
" Sichuan Province's Ming River, a small bay in a river river water pollutants of water basin discharge mark have been issued for Ming River and the basin Tuo Jiang on January 1, in, the Environmental Protection in Sichuan Province Room
It is quasi- " (DB51/2311-2016), these provincial standards are strict in " town sewage plant pollutant emission standard GB18918-2002 "
(level-one A).Thus, it is possible to find out that country or place propose sewage plant the attention of mark transformation.
However, the generally existing some problems of sewage plant are extremely difficult to new substantially if these problems fail to be addressed at present
The problem of standard discharges the requirement of water quality to sewage plant, specifically exists is as follows:
(1) easily there is sludge bulking when seasonal variations in the most of urban wastewater treatment firm in the north and sludge activity drops
Low phenomenon causes effluent quality SS and total nitrogen exceeded.
(2) sewage plant was built in for 20th century mostly, due to long-term oepration at full load, the overage military service of pump house majority pump, and cavitation erosion
Seriously, inefficient, safety coefficient is low, can be improved by safeguarding or replacing equipment pipe.
(3) the original construction of most of sewage plants is usually before 2006, and the standard of technological design reference is level-one B
Discharge standard.With the fast development in city, the sewage treatment plant of original construction is surrounded by urban construction, not extra
Vacant lot for increase newly advanced treatment process.
Therefore, the effluent quality of the whole nation sewage plant that the sewage plant built and part are built after 2006 before 2006 is not
It is able to satisfy new requirement, especially those sewage plants for needing to be implemented more stringent provincial standard, needs to seek a kind of efficient
Denitrification dephosphorization technique solves current technological difficulties.
Summary of the invention
For overcome the deficiencies in the prior art, occupied area is reduced, the invention proposes a kind of biological clarification tanks and biology
High-efficient denitrification and dephosphorization system associated with filter tank, be used for sewage treatment, the inventive technique have it is compact-sized, land used is few, denitrogenation
The features such as dephosphorization efficiency is high.
High-efficient denitrification and dephosphorization system associated with a kind of biological clarification tank and biofilter, including biological clarification tank, aeration life
Object filter tank and denitrification bio-filter；The biological clarification tank includes anaerobic zone, anoxic zone, aerobic zone and settling section；The exposure
Gas biofilter and the denitrification bio-filter are set to the biological clarification tank rear end.
Further, two pieces of adjustable deflectors, two pieces of water conservancy diversion not being adjustable are equipped in the anaerobic zone and anoxic zone
Plate and diving mixer；Aerator is equipped in the aerobic zone.
Further, the biological clarification tank anaerobic zone, anoxic zone, aerobic zone and settling section hydraulic detention time ratio are 2:
2:6:1, the anoxic zone external reflux ratio control is 100% ~ 150%.
Further, the adjustable deflector by adjusting with flow back in biological clarification tank pool wall spacing realization device
Than controlling 100% ~ 200%.
Further, the aerator is not limited only to tube aerator or plate-type aerator.
Further, the biological aerated filter hydraulic detention time control is discharged dissolved oxygen control 2 in 20 ~ 40min
~6mg/L；Denitrification bio-filter hydraulic detention time control in 15 ~ 30min, be discharged dissolved oxygen control 1.0mg/L with
Under.
The beneficial effects of the present invention are:
First, the biological clarification tank that the present invention uses is able to carry out synchronous denitrification dephosphorizing, and clarifying basin uses special interior time
Flow structure design, may make sludge concentration to be increased to 8000mg/L, greatly reduce excess sludge discharge.Meanwhile biological clarification tank
It is the technique for integrating biochemical action and precipitation, compact-sized, head loss is small.
Second, the biofilter that the present invention uses is made of biological aerated filter and denitrification bio-filter two-stage, due to
Biological clarification tank is removed most COD in front in raw water, using nitrifier as dominant bacteria in biological aerated filter
Kind, high to the removal rate of ammonia nitrogen, effluent of aeration biological filter is partly refluxed to front biological clarification tank and carries out denitrification denitrogenation,
And denitrification bio-filter can be further ensured that TP, SS, TN are up to standard.
Detailed description of the invention
Fig. 1 is the case study on implementation of high-efficient denitrification and dephosphorization system associated with a kind of biological clarification tank of the present invention and biofilter
Structure chart；
Fig. 2 is biological clarification tank plan view of the present invention.
Each section in attached drawing are as follows: 1- biological clarification tank；101- water inlet；102- nitrification liquid water inlet；103- aeration tube；
104- mud discharging mouth；105- water outlet；Deflector is adjusted in 106-；107- deflector；108- diving mixer；109- anaerobism
Area；The anoxic zone 110-；The aerobic zone 111-；112- settling section；2- biological aerated filter；3- denitrification bio-filter；4- reflux pump.
Specific embodiment
The more excellent case study on implementation of the present invention is described in further detail below in conjunction with attached drawing:
High-efficient denitrification and dephosphorization system associated with a kind of biological clarification tank and biofilter as shown in Fig. 1, including biology
Clarifying basin 1, biological aerated filter 2 and denitrification bio-filter 3；The biological clarification tank 1 divides for anaerobic zone 109, anoxic zone
110, aerobic zone 111 and settling section 112；The biological aerated filter 2 and the denitrification bio-filter 3 are set to the biology
1 rear end of clarifying basin.
As shown in Fig. 2, two pieces of adjustable deflectors 106 are equipped in anaerobic zone 109 and anoxic zone 110, two pieces cannot
The deflector 107 of adjusting, diving mixer 108；Aeration tube 103 is equipped in aerobic zone 111.
Sewage treatment, tool are carried out using high-efficient denitrification and dephosphorization system associated with biological clarification tank of the invention and biofilter
Body process is as follows:
Sewage is entered in biological clarification tank 1 by water inlet 101 after front end pre-processes, dives under water and stir in anaerobic zone 109
After mixing 108 plug-flow of machine, water inlet is uniformly mixed with phegma, is released while in anaerobic zone, 109 cohesion phosphorus microorganism absorbs organic matter
Put orthophosphates.Then sewage is uniformly mixed by the mixed liquor that deflector 107 is quickly flowed into nitrification liquid water inlet 102, this
When waste water by anoxic zone 110 occur denitrification denitrogenation reaction.Then, mixed liquor a part enters aerobic zone 111, due to dissolution
Oxygen increases, and aerobic heterotroph is dominant, and a large amount of organic matters decomposed in sewage carry out carburizing reagent, and nitrifier accounts for disadvantage, ammonia
The treatment effeciency of nitrogen is poor, while polyP bacteria absorbs a large amount of phosphorus from sewage；Another part mixed liquor is through adjustable water conservancy diversion
Plate 106 is flowed into anaerobic zone 109, guarantees sludge concentration and whole system nitric efficiency.Then, sewage by aerobic zone 111 into
Enter settling section 112, mainly realize and be separated by solid-liquid separation, by discharging excess sludge for total phosphorus ligands.And then, biological clarification tank 1
Water outlet flows into biological aerated filter 2, because most of organic matter is consumed by Institute of Micro-biology in biological clarification tank 1, filters in aeration and biological
Nitration reaction mainly occurs in pond 2, further decreases ammonia nitrogen, and part water outlet is squeezed into 1 anoxic of biological clarification tank by reflux pump 4
Area 110.Remaining water outlet enters denitrification bio-filter 3, mainly realizes denitrification denitrogenation, removal SS and TP, it is ensured that water outlet is steady
Determine qualified discharge.
Wherein, the anaerobic zone 109, anoxic zone 110, aerobic zone 111 of biological clarification tank 1 and 112 residence time of settling section ratio
For 2:2:6:1；Adjustable deflector 106 by adjusting with 1 pool wall spacing realization device internal reflux ratio of biological clarification tank, control exists
100%~200%；Nitrification liquid external reflux ratio is controlled 100% ~ 150%；The control of 2 hydraulic detention time of biological aerated filter 20 ~
40min, water outlet dissolved oxygen control is in 2 ~ 6mg/L；The control of denitrification bio-filter hydraulic detention time is water-soluble out in 15 ~ 30min
Oxygen control is solved in 1.0mg/L or less.
Embodiment 1
Processing test is carried out to Sichuan sewage treatment plant raw water using present invention process, design treatment amount is 200m3/ d,
Wherein biological clarification tank total residence time is 11h, and biological aerated filter hydraulic detention time is 30min, denitrification bio-filter
Hydraulic detention time is 20min, which is better than " urban wastewater treatment firm pollutant emission standard " (GB18918-
2002) level-one A standard.
Table 1 tests Inlet and outlet water water quality situation
| Classification | pH | COD (mg/L) | NH3-N (mg/L) | TN (mg/L) | TP (mg/L) |
| Test water inlet | 6~9 | ≤300 | ≤28 | ≤40 | ≤4.5 |
| Test water outlet | 6~9 | ≤40 | ≤3 | ≤10 | ≤0.4 |
| Level-one A standard | 6~9 | ≤50 | ≤5 | ≤15 | ≤0.5 |
Embodiment 2
Using the treatment process of embodiment 1, waste water identical as case study on implementation 1 is handled, design treatment amount is 150m3/ d,
Middle biological clarification tank total residence time is 14h, and biological aerated filter hydraulic detention time is 40min, denitrification bio-filter water
The power residence time is 25min, which is better than " urban wastewater treatment firm pollutant emission standard " (GB18918-
2002) level-one A standard.
Table 2 tests Inlet and outlet water water quality situation
| Classification | pH | COD (mg/L) | NH3-N (mg/L) | TN (mg/L) | TP (mg/L) |
| Test water inlet | 6~9 | ≤300 | ≤28 | ≤40 | ≤4.5 |
| Test water outlet | 6~9 | ≤30 | ≤1.5 | ≤5 | ≤0.3 |
| Level-one A standard | 6~9 | ≤50 | ≤5 | ≤15 | ≤0.5 |
Above said content is only that further detailed description of the invention in conjunction with specific preferred embodiment, no
Specific implementation range of the invention can therefore be limited.The unspecified part of the present invention is well-known technique, is not departing from this
Under the premise of inventive technique scheme, those skilled in the art can also make several simple changes or replace
It changes, should all be included within the scope of the present invention.
Claims (6)
1. high-efficient denitrification and dephosphorization system associated with a kind of biological clarification tank and biofilter, characterized in that including biological clarification tank,
Biological aerated filter and denitrification bio-filter；The biological clarification tank includes anaerobic zone, anoxic zone, aerobic zone and settling section；
The biological aerated filter and the denitrification bio-filter are set to the biological clarification tank rear end.
2. high-efficient denitrification and dephosphorization system associated with biological clarification tank according to claim 1 and biofilter, characterized in that
Two pieces of adjustable deflectors, two pieces of deflectors and diving mixer not being adjustable are equipped in the anaerobic zone and anoxic zone；Institute
It states and is equipped with aerator in aerobic zone.
3. high-efficient denitrification and dephosphorization system associated with biological clarification tank according to claim 2 and biofilter, characterized in that
The biological clarification tank anaerobic zone, anoxic zone, aerobic zone and settling section hydraulic detention time ratio are 2:2:6:1, the anoxic zone
External reflux ratio is controlled 100% ~ 150%.
4. high-efficient denitrification and dephosphorization system associated with biological clarification tank according to claim 2 and biofilter, characterized in that
The adjustable deflector by adjusting with biological clarification tank pool wall spacing realization device internal reflux ratio, control 100% ~ 200%.
5. high-efficient denitrification and dephosphorization system associated with biological clarification tank according to claim 2 and biofilter, characterized in that
The aerator is not limited only to tube aerator or plate-type aerator.
6. high-efficient denitrification and dephosphorization system associated with biological clarification tank according to claim 1 and biofilter, characterized in that
The biological aerated filter hydraulic detention time control is discharged dissolved oxygen control in 2 ~ 6mg/L in 20 ~ 40min；The denitrification
Hydraulic detention time control in biofilter is discharged dissolved oxygen control in 1.0mg/L or less in 15 ~ 30min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821445889.4U CN208980419U (en) | 2018-09-05 | 2018-09-05 | High-efficient denitrification and dephosphorization system associated with a kind of biological clarification tank and biofilter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821445889.4U CN208980419U (en) | 2018-09-05 | 2018-09-05 | High-efficient denitrification and dephosphorization system associated with a kind of biological clarification tank and biofilter |
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| Publication Number | Publication Date |
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| CN208980419U true CN208980419U (en) | 2019-06-14 |
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