CN105366888B - A kind of method and device for small flow sewage deep denitrogenation dephosphorizing - Google Patents
A kind of method and device for small flow sewage deep denitrogenation dephosphorizing Download PDFInfo
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- CN105366888B CN105366888B CN201510843584.3A CN201510843584A CN105366888B CN 105366888 B CN105366888 B CN 105366888B CN 201510843584 A CN201510843584 A CN 201510843584A CN 105366888 B CN105366888 B CN 105366888B
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Abstract
The present invention discloses a kind of method and apparatus for small flow sewage deep denitrogenation dephosphorizing.Its method includes the following steps：Sewage enters alternate area, aeration and stirring alternate run by way of continuous flow first, and the removal to nitrogen and phosphorus is realized in the same pond；Treated, and sewage subsequently enters the oxygenation zone of reaction tank, further removes BOD, ammonia nitrogen and total phosphorus；Subsequent sewage enters sedimentation basin and carries out mud-water separation.The present invention realizes nitration denitrification in the same pond and releases the poly- phosphorus of phosphorus by aeration/stirring alternate run, is not necessarily to muddy water internal circulation pump, and method is simple, and can fully utilize organic carbon, high to the removal efficiency of nitrogen phosphorus；Using intermittent aerating, aeration efficiency can be improved, aeration energy consumption is reduced；Make full use of nitrate as electron acceptor, system oxygen demand is reduced, and low energy consumption for processing；Stable effluent quality, no ammonia nitrogen and phosphoric acid salt accumulation；It by the air lift benefit that aeration generates, realizes sludge reflux, is not necessarily to sludge reflux pump, and sludge reflux amount is big, system can maintain higher sludge concentration, reactor volume to reduce.
Description
Technical field
The present invention relates to technical field of sewage, are removed for small flow sewage deep denitrogenation more particularly, to one kind
The method and device of phosphorus.
Background technology
Though China has built a large amount of centralized municipal sewage plant, the wastewater treatment rate in small towns and rural area is still below
20%.For country sewage, it is suitble to use distributed sewage disposal method, to reduce sewage network construction cost.In rural area etc.
In small flow sewage disposal, due to lacking the administrative staff of profession, traditional denitrogenation dephosphorizing new method, such as A2O etc., due to method
Complexity, management difficulty are high, it is difficult to promote the use of.In addition, in conventional method, since nitrification liquid reflux is limited, and to organic carbon
Utilization it is insufficient, the effect of denitrogenation dephosphorizing is simultaneously bad.The novel denitrogenation method being currently widely studied, such as ANAMMOX and short
Journey nitration denitrification, due to service condition harshness, it is difficult to large-area applications are not high in ammonia nitrogen concentration, and water quality and quantity changes greatly, and
The sanitary sewage disposal that effluent quality is required to be continuously improved.Membrane bioreactor film is of high cost, operational management is complicated, at present still
Non- large area is for sanitary sewage disposal and discharge.Therefore, it is novel, easy to be badly in need of one kind, for small flow sewage disposal
The new method and device of denitrogenation dephosphorizing.
Invention content
The present invention is at least one defect overcome described in the above-mentioned prior art, is provided a kind of for small flow sewage deep
The method and device of denitrogenation dephosphorizing, low energy consumption for processing, high treating effect, without muddy water internal circulation pump without sludge reflux pump,
Particularly suitable for small flow sewage disposal.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
A kind of small flow sewage deep denitrification dephosphorization apparatus, including reaction tank, sedimentation basin and control device, the reaction tank
Equipped with partition board, the reaction tank is divided into the aeration/stirring alternate area and oxygenation zone of bottom connection；The aeration/stirring is handed over
For area be equipped with the first aerator and agitating device, the oxygenation zone be equipped with the second aerator, the control device respectively with
First aerator, agitating device and the connection of the second aerator, and control the first aerator, agitating device and alternately transport
Row；The bottom of the sedimentation basin is connected to by sludge reflux channel with the bottom of the aeration/stirring alternate area, the oxygenation zone
It is connected to the sedimentation basin by sedimentation basin intake tunnel；The sludge reflux channel and the exposure for being set to aeration/stirring alternate area
Gas return duct is connected to, and aeration head is equipped in the aeration return duct；The aeration return duct is exported equipped with returned sludge, described time
The height of stream sludge outlet is slightly below reaction tank liquid level.
By control device, the agitating device and aerator alternate run in aeration/stirring alternate area are controlled, same
Nitration reaction and anti-nitration reaction are realized in a pond, and releases the poly- phosphorus effect of phosphorus, are not necessarily to muddy water internal circulation pump, have been broken tradition
Nitrification liquid reflux is limited in technique and utilizes insufficient problem to organic carbon, simplifies technological process, is imitated to the removal of nitrogen phosphorus
Rate higher, effect are more preferable；Anti-nitration reaction is more thorough, makes full use of nitrate as electron acceptor, reduces oxygen demand；Between
Aeration of having a rest reduces aeration energy consumption more using oxygen transfer.By the aeration head in aeration return duct, have in aeration process
Flow Improve Efficiency is back to aeration/stirring by the sludge to sink in sedimentation basin by sludge reflux channel and aeration return duct
Alternate area is not necessarily to sludge reflux pump, realizes the dirt that low energy consumption, high flow capacity sludge reflux, and return sludge ratio are high, are maintained in system
Mud concentration is high, and reactor volume is small；The height of the returned sludge outlet is slightly below the design of reaction tank liquid level, can be to avoid exposure
Gas head, may be to the negative effect of denitrification generation in aeration/stirring alternate area in aeration process.
Preferably, the sedimentation basin intake tunnel is equipped with sedimentation basin water inlet, and the sedimentation basin water inlet is located at described fill
The middle part in oxygen area, the oxygenation zone are connected to by the sedimentation basin water inlet with the sedimentation basin intake tunnel, the sedimentation basin
One end of intake tunnel is equipped with bubble liberation port, and the other end of the sedimentation basin intake tunnel is connected to the sedimentation basin.It is filling
The mud mixture in oxygen area is entered using gravity from the precipitation water inlet in the middle part of oxygenation zone via sedimentation basin intake tunnel
To sedimentation basin.
Preferably, the sedimentation basin is equipped with sedimentation basin exit weir.Mud mixture releases the mouth of a river by sedimentation basin and enters precipitation
Chi Hou, in sedimentation basin, sludge sinks, and clear water is upper, is flowed out from sedimentation basin exit weir.
Preferably, first aerator includes the first aeration tube and the first air blower, first aeration tube and the
One air blower connects.
Preferably, second aerator includes the second aeration tube and the second air blower, second aeration tube and the
Two air blowers connect.
Preferably, the aeration head is connect with second air blower.Since oxygenation zone is in the state persistently supplied, i.e.,
Second air blower continue working, therefore aeration head is connect with the second air blower, aeration head can be made to be in continue working state,
Sludge circulation is set to continue.
Preferably, the bottom of the sedimentation basin is in funnel-form.Funnelform sedimentation basin bottom, can be such that sludge preferably enters
Sludge reflux channel is back to aeration/stirring alternate area.
Preferably, the volumetric ratio of the aeration/stirring alternate area and the oxygenation zone is 10:1 to 5:1.
A method of be used for small flow sewage deep denitrogenation dephosphorizing, using the sewage deep denitrification dephosphorization apparatus into
Row, sewage first pass around alternative aeration/stirring, complete nitrification and denitrification, remove ammonia nitrogen and total nitrogen, and the poly- phosphorus of phosphorus is released in completion, rich
Collect polyP bacteria, then sewage further removes BOD, ammonia nitrogen and total phosphorus using aerobic aeration, and subsequent sewage enters sedimentation basin profit
Mud-water separation is carried out with gravity, clear water is discharged from top, and sludge flows back from bottom.
Specifically comprise the following steps：
S1, alternate area are in aeration phase：Sewage enters aeration/stirring alternate area by way of continuous flow, when alternately
When area is in aeration phase, aerobic state is in alternate area, ammonia nitrogen is oxidized to nitrate, and BOD is aoxidized；PolyP bacteria absorbs
Free acid phosphate, realizes the removal of ammonia nitrogen, organic matter, total phosphorus；
S2, alternate area are in agitation phases：After aeration is just stagnated, since the nitrate concentration left as the stage is high,
Alternate area is in anaerobic condition, and denitrifying bacterium is using the degradable organic matter of the dissolubility in sewage as electron donor, nitrate
It is reduced into nitrogen, to remove total nitrogen.With the removal of nitrate, which becomes anaerobic state by anoxic, and polyP bacteria is by body
Interior organophosphor is converted into Phos and is discharged, and degradable using acetic acid in the energy absorption sewage of this process generation etc.
For organic matter to synthesize PHB, storage is used as carbon source in vivo, is ready for next stage aerobic phosphorus absorption.Due to diluted effect,
When alternate area is in agitation phases, in the accumulation unobvious in the area, the BOD and ammonia nitrogen accumulated on a small quantity will be rear for BOD and ammonia nitrogen
It is removed in continuous oxygenation zone；
Step S1 and S2, the aeration/stirring alternate area of reaction tank alternately so that sewage can be in the same pond
Middle realization nitration denitrification removes total nitrogen, by releasing the poly- phosphorus ligands total phosphorus of phosphorus, broken in traditional handicraft nitrification liquid reflux by
Limit, and insufficient problem is utilized to organic carbon.
S3, oxygenation zone：Oxygenation zone is in aerobic state always, and ammonia nitrogen is oxidized to nitrate, and BOD is aoxidized；PolyP bacteria
The acid phosphate that dissociates is absorbed, realizes the further removal to ammonia nitrogen, organic matter, total phosphorus；
S4, mud-water separation：Treated for oxygenation zone sewage, enters sedimentation basin using gravity and carries out mud-water separation, clear water is not
Disconnected to be discharged from the top of sedimentation basin, sludge is back to the aeration/stirring alternate area of reaction tank from the sludge reflux channel of sedimentation basin.
Sewage of the present invention is the organic wastewater of the easily biological-degradables such as sanitary sewage, food and drink waste water.It is of the present invention
The processing capacity of device is 500 ton days or following.
In alternate area of the present invention, alternately with stirring, the time for being aerated or being stirred every time is 0.5 ~ 2 to aeration
Hour.
Preferably, it in alternate area, is aerated every time equal with the time of stirring.
In the present invention, the aeration phase in oxygenation zone and alternate area, preferably dissolved oxygen are controlled in 1.0-2.0 mg/litres.
In the present invention, hydraulic detention time is selected according to influent concentration, it is preferable that when the conventional sanitary sewage of processing, hand over
For area hydraulic detention time at 10 hours or so, the hydraulic detention time of oxygenation zone was at 2 hours or so.
In the present invention, at 12 days or more, temperature reduced sludge age general control, then improves sludge age.
Compared with prior art, the beneficial effects of the invention are as follows：
Sewage deep denitrification and dephosphorization method and device provided by the present invention for small flow sewage disposal passes through exposure
Gas/stirring alternate run, nitration denitrification is realized in the same pond, releases the poly- phosphorus of phosphorus, is not necessarily to muddy water internal circulation pump, method letter
It is single, and organic carbon can be fully utilized, it is high to the removal efficiency of nitrogen phosphorus；Using intermittent aerating, aeration efficiency can be improved, reduces and exposes
Gas energy consumption；Make full use of nitrate as electron acceptor, system oxygen demand is reduced, and low energy consumption for processing；Oxygenation zone can guarantee water outlet
Water stabilization, no ammonia nitrogen and phosphoric acid salt accumulation；Aeration head is set in sludge reflux channel, is had by aeration process itself
Muddy water Improve Efficiency is not necessarily to sludge reflux pump, and realizes big flow sludge reflux, reduces sludge reflux energy consumption and can maintain higher
Sludge concentration, reduce reactor volume.
Description of the drawings
Fig. 1 is the structural schematic diagram of the device for small flow sewage deep denitrogenation dephosphorizing.
Specific implementation mode
The present invention is further illustrated With reference to embodiment.
The same or similar label correspond to the same or similar components in the attached drawing of the embodiment of the present invention；In retouching for the present invention
In stating, it is to be understood that if there is the orientation of the instructions such as term "upper", "lower", "left", "right", "top", "bottom", "inner", "outside"
Or position relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, and
It is not that the device of instruction or hint meaning or element must have a particular orientation, with specific azimuth configuration and operation, therefore
The terms describing the positional relationship in the drawings are only for illustration, should not be understood as the limitation to this patent.
If in addition, there is the terms such as " first ", " second " to be used for description purposes only, be mainly used for distinguishing different devices,
Element or component（Specific type is identical with construction possibility may also be different）, it is not intended to show or imply indicated dress
It sets, the relative importance and quantity of element or component, and should not be understood as indicating or implying relative importance.
In the present invention, the sludge is activated sludge, wherein containing conventionally used for the aerobic heterotroph of sewage disposal, nitre
Change bacterium, denitrifying bacterium and polyP bacteria.
Embodiment 1
Fig. 1 is a kind of structural schematic diagram of device for small flow sewage deep denitrogenation dephosphorizing of the present invention.Such as Fig. 1 institutes
Show, a kind of device for small flow sewage deep denitrogenation dephosphorizing, including reaction tank, sedimentation basin 3 and control device 4, reaction tank
Equipped with partition board 8, reaction tank is divided into aeration/stirring alternate area 1 and the oxygenation zone 2 of bottom connection, the bottom of sedimentation basin 3 is leakage
Bucket-shaped, bottom is equipped with sedimentation basin bucket 17, and the top of sedimentation basin 3 is equipped with sedimentation basin exit weir 15；Aeration/stirring alternate area 1 is set
There are the first aerator and agitating device 6, oxygenation zone 2 to be equipped with the second aerator, control device 4 is filled with the first aeration respectively
It sets, agitating device 6 is connected with the second aerator；First aerator includes the first aeration tube 7 and first drum being connected with each other
Wind turbine 23, the second aerator include the second aeration tube 10 and the second air blower 21 being connected with each other；Oxygenation zone 2 passes through sedimentation basin
Intake tunnel 25 is connected to sedimentation basin 3, and sedimentation basin intake tunnel 25 is equipped with sedimentation basin water inlet 12, and sedimentation basin water inlet 12 is located at
The middle part of oxygenation zone 2, oxygenation zone 2 are connected to by sedimentation basin water inlet 12 with sedimentation basin intake tunnel 25, sedimentation basin intake tunnel
25 one end is equipped with bubble liberation port 13, and the level height of bubble liberation port 13 is higher than the height of the liquid level 24 of reaction tank, precipitation
The other end of pond intake tunnel 25 releases the mouth of a river 14 equipped with sedimentation basin, and sedimentation basin intake tunnel 25 is released the mouth of a river 14 and sunk by sedimentation basin
Shallow lake pond 3 is connected to；The bottom of sedimentation basin 3 is connected to by sludge reflux channel 18 with the bottom of aeration/stirring alternate area 1, is aerated/is stirred
The bottom for mixing alternate area 1 is equipped with aeration return duct 26, and aeration return duct 26 is connected to the sludge reflux channel 18, aeration reflux
The upper end of pipe 26 is equipped with returned sludge and exports 20, and returned sludge outlet 20 is located near the liquid level 24 of reaction tank, is aerated return duct
26 lower end is equipped with aeration head 19, and aeration head 19 is connect with the second air blower 21.
The volumetric ratio of the aeration/stirring alternate area 1 and the oxygenation zone 2 is 10:1 to 5:1.
The method for carrying out small flow sewage deep denitrogenation dephosphorizing using the device of above-mentioned sewage deep denitrogenation dephosphorizing, specific mistake
Journey is as follows：
First, alternate area is in aeration phase, is nitrified, BOD is aoxidized and poly- phosphorus：Raw sewage passes through gravity stream or pumping
Aeration/stirring alternate area 1 is continuously entered via intake tunnel 5.The aeration of aeration/stirring alternate area 1 is carried by the first air blower 23
For.When the first air blower 23 is in running order, blender 6 stagnates work, which is in aerobic state.Ammonia nitrogen is oxidized to
Nitrate, i.e. nitration reaction, to remove ammonia nitrogen；BOD is oxidized away, to remove organic matter；It is stored in polyP bacteria oxidation
Machine matter production capacity simultaneously absorbs the acid phosphate that dissociates, i.e., poly- phosphorus, to remove total phosphorus.
Second, alternate area is in agitation phases, carries out denitrification, releases phosphorus：The first air blower 23 is stagnated, startup is aerated/stirs
The agitating device 6 of alternate area 1 is mixed, the area is in anaerobic condition at this time.Using BOD as electron donor, nitrate is reduced into nitrogen
Gas, i.e. anti-nitration reaction, while removing BOD and total nitrogen.As second step denitrification is handled, nitric acid in aeration/stirring alternate area 1
Salinity is lower, and when nitrate concentration is relatively low, which is in anaerobic state, and polyP bacteria carries out releasing phosphorus.When in anaerobic state,
PolyP bacteria converts internal organophosphor to Phos and is discharged, and utilizes second in the energy absorption sewage of this process generation
For the degradable organic matter such as acid to synthesize PHB, storage is used as carbon source in vivo, prepares for the aerobic phosphorous accumulating of next stage.
Third further removes BOD, ammonia nitrogen and total phosphorus in oxygenation zone：Sewage in aeration/stirring alternate area 1, passes through water
Circulation road 9 enters oxygenation zone 2.Second aeration tube 10 of oxygenation zone 2 is constantly in aeration state, is aerated by the second air blower 21
It provides.Under aerobic state, PHB is degraded and takes the photograph energy needed for phosphorus to provide by polyP bacteria, is carried out excess and is inhaled phosphorus, to complete poly- phosphorus
Process removes total phosphorus in water removal；Due to diluted effect, BOD and ammonia nitrogen in aeration/stirring alternate area 1 the area accumulation not
Obviously, the BOD and ammonia nitrogen accumulated on a small quantity is removed in oxygenation zone 2 using the aeration of the second aeration tube 10.
4th, mud-water separation：Mud mixture in oxygenation zone 2 passes through the sedimentation basin water inlet being located in the middle part of reaction tank
12, it releases the mouth of a river 14 from sedimentation basin and enters sedimentation basin 3.In sedimentation basin 3, sludge sinks, and clear water is upper, and upper clear water is from precipitation
Pond exit weir 15 is flowed out via exhalant canal 16, and the sludge to precipitate then enters sedimentation basin bucket 17.When by the second air blast
When the aeration head 19 that machine 21 supplies starts, form air lift benefit, the sludge in sedimentation basin bucket 17 by sludge reflux channel 18,
It is aerated return duct 26 and returned sludge outlet 20, reenters aeration/stirring alternate area 1.
By aeration/stirring alternate run, nitration denitrification is realized in the same pond first by the present invention, and it is poly- to release phosphorus
Phosphorus is not necessarily to muddy water internal circulation pump, and method is simple, and can fully utilize organic carbon, high to the removal efficiency of nitrogen phosphorus；Using interval
Aeration can improve aeration efficiency, reduce aeration energy consumption；Make full use of nitrate as electron acceptor, system oxygen demand is reduced, place
Low energy consumption for reason；Oxygenation zone can guarantee stable effluent quality, no ammonia nitrogen and phosphoric acid salt accumulation；Aeration is set in sludge reflux channel
Head, the muddy water Improve Efficiency having by aeration process itself are not necessarily to sludge reflux pump, and realize big flow sludge reflux, subtract
Few sludge reflux energy consumption, and system can maintain higher sludge concentration, reduce reactor volume.
Embodiment 2
Using 1 described device of the present embodiment carry out sanitary sewage the example of advanced nitrogen dephosphorization.Using conventional life
Sewage living, handles about 50 ton day of water.Influent quality feature：The mg/litres of COD ~ 350, the mg/litres of TSS ~ 150, TN ~ 29
Mg/litre, the mg/litre of ammonia nitrogen ~ 18, the mg/litres of TP ~ 3.8.Control parameter：Alternate area control is aerated 1 hour every time, is then stirred
It mixes 1 hour, when aeration, dissolved oxygen is controlled in 2 milligrams/L or so, and the hydraulic detention time of alternate area was at 10 hours or so, oxygenation
The hydraulic detention time in area was at 2 hours or so, about 20 degree of water temperature.
After the system stabilizes, by scheduling to last the trace test in January, the mean concentration for going out water pollutant is：COD ~ 25 milligram/
It rises, the mg/litres of TSS ~ 9.4, the mg/litres of TN ~ 8.2, the mg/litre of ammonia nitrogen ~ 0.2, the mg/litres of TP ~ 0.4, effluent quality reaches comprehensively
To China《Urban wastewater treatment firm pollutant emission standard》（GB 18918-2002）Middle level-one A standards.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
All any modification, equivalent and improvement etc., should be included in the claims in the present invention made by within the spirit and principle of invention
Protection domain within.
Claims (9)
1. a kind of small flow sewage deep denitrification dephosphorization apparatus, including reaction tank, sedimentation basin（3）And control device（4）, feature
It is, the reaction tank is equipped with partition board（8）, the reaction tank is divided into the aeration/stirring alternate area of bottom connection（1）With fill
Oxygen area（2）；The aeration/stirring alternate area（1）Equipped with the first aerator and agitating device（6）, the oxygenation zone（2）It is equipped with
Second aerator, the control device（4）Respectively with first aerator, agitating device（6）With the second aerator
Connection, and control the first aerator, agitating device（6）Alternate run；The sedimentation basin（3）Bottom it is logical by sludge reflux
Road（18）With the aeration/stirring alternate area（1）Bottom connection, the oxygenation zone（2）Pass through sedimentation basin intake tunnel（25）
With the sedimentation basin（3）Connection, the sedimentation basin intake tunnel（25）Equipped with sedimentation basin water inlet（12）, the sedimentation basin water inlet
Mouthful（12）Positioned at the oxygenation zone（2）Middle part, the oxygenation zone（2）Pass through the sedimentation basin water inlet（12）With the precipitation
Pond intake tunnel（25）Connection, the sedimentation basin intake tunnel（25）One end be equipped with bubble liberation port（13）, the sedimentation basin
Intake tunnel（25）The other end and the sedimentation basin（3）Connection；The sludge reflux channel（18）It is handed over set on aeration/stirring
For area（1）Aeration return duct（26）Connection, the aeration return duct（26）It is interior to be equipped with aeration head（19）；The aeration return duct
（26）It is exported equipped with returned sludge（20）, the returned sludge outlet（20）Height be slightly below reaction tank liquid level.
2. small flow sewage deep denitrification dephosphorization apparatus as described in claim 1, which is characterized in that the sedimentation basin（3）If
There is sedimentation basin exit weir（15）.
3. small flow sewage deep denitrification dephosphorization apparatus as described in claim 1, which is characterized in that first aerator
Including the first aeration tube（7）With the first air blower（23）, first aeration tube（7）With the first air blower（23）Connection.
4. small flow sewage deep denitrification dephosphorization apparatus as described in claim 1, which is characterized in that second aerator
Including the second aeration tube（10）With the second air blower（21）, second aeration tube（10）It is connect with the second air blower（21）.
5. small flow sewage deep denitrification dephosphorization apparatus as claimed in claim 4, which is characterized in that the aeration head（19）With
The second air blower connection（21）.
6. small flow sewage deep denitrification dephosphorization apparatus as described in claim 1, which is characterized in that the sedimentation basin（3）'s
Bottom is in funnel-form.
7. small flow sewage deep denitrification dephosphorization apparatus as described in claim 1, which is characterized in that the aeration/stirring is handed over
For area（1）With the oxygenation zone（2）Volumetric ratio be 5:1 to 10:1.
8. a kind of method for small flow sewage deep denitrogenation dephosphorizing, which is characterized in that arbitrary using such as claim 1 to 7
Sewage deep denitrification dephosphorization apparatus described in one carries out, and includes the following steps：
S1, alternate area are in aeration phase：Sewage enters aeration/stirring alternate area by way of continuous flow, at alternate area
When aeration phase, alternate area is in aerobic state, and ammonia nitrogen is oxidized to nitrate, and BOD is aoxidized；PolyP bacteria absorbs free property
Phosphate realizes the removal to ammonia nitrogen, organic matter, total phosphorus；
S2, alternate area are in agitation phases：When alternate area is in agitation phases, alternate area is in anaerobic condition at the beginning, instead
Nitrifier, by nitrate reduction at nitrogen, removes total nitrogen using BOD as electron donor；After nitrate exhausts, which, which is in, detests
Oxygen condition, polyP bacteria absorb and store small molecule organic matter, inhale phosphorus for follow-up aerobic stage and are ready；
S3, oxygenation zone：Oxygenation zone is in aerobic state always, and ammonia nitrogen is oxidized to nitrate, and BOD is aoxidized；PolyP bacteria absorbs
Free acid phosphate, realizes the further removal of ammonia nitrogen, organic matter, total phosphorus；
S4, mud-water separation：Treated for oxygenation zone, and sewage enters that sedimentation basin carries out mud-water separation, and clear water is constantly from the upper of sedimentation basin
Portion is discharged, and sludge is back to the aeration/stirring alternate area of reaction tank from the sludge reflux channel of sedimentation basin.
9. the method for being used for small flow sewage deep denitrogenation dephosphorizing as claimed in claim 8, which is characterized in that aeration/stirring is handed over
It it is 0.5 ~ 2 hour for the time in area, being aerated or being stirred every time；
Aeration phase in oxygenation zone and alternate area, dissolved oxygen are controlled in 1.0 ~ 2.0 mg/litres.
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| US4655925A (en) * | 1984-01-20 | 1987-04-07 | Nishihara Environmental Sanitation Research Corporation Limited | Activated sludge method |
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| CN103787500A (en) * | 2014-01-20 | 2014-05-14 | 中国矿业大学 | Denitrifying-based phosphorus and nitrogen removal process for sequencing batch type two-sludge system |
| CN205258129U (en) * | 2015-11-26 | 2016-05-25 | 暨南大学 | Low discharge sewage degree of depth nitrogen and phosphorus removal device |
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- 2015-11-26 CN CN201510843584.3A patent/CN105366888B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4655925A (en) * | 1984-01-20 | 1987-04-07 | Nishihara Environmental Sanitation Research Corporation Limited | Activated sludge method |
| CN1686862A (en) * | 2005-03-29 | 2005-10-26 | 上海市政工程设计研究院 | Improved type alternated technique for wastewater treatment of activated sludge process and equipment |
| CN101172711A (en) * | 2007-10-09 | 2008-05-07 | 重庆大学 | Sewage treating apparatus of point-division feed water multilevel biomembrane reactor |
| CN103787500A (en) * | 2014-01-20 | 2014-05-14 | 中国矿业大学 | Denitrifying-based phosphorus and nitrogen removal process for sequencing batch type two-sludge system |
| CN205258129U (en) * | 2015-11-26 | 2016-05-25 | 暨南大学 | Low discharge sewage degree of depth nitrogen and phosphorus removal device |
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