CN110217939A - Based on modified form AAO sewage water denitrification dephosphorization apparatus and technique - Google Patents
Based on modified form AAO sewage water denitrification dephosphorization apparatus and technique Download PDFInfo
- Publication number
- CN110217939A CN110217939A CN201910350631.9A CN201910350631A CN110217939A CN 110217939 A CN110217939 A CN 110217939A CN 201910350631 A CN201910350631 A CN 201910350631A CN 110217939 A CN110217939 A CN 110217939A
- Authority
- CN
- China
- Prior art keywords
- pond
- sewage
- anoxic
- anaerobic
- electrolytic cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
Abstract
The present invention relates to modified form AAO sewage water denitrification dephosphorization apparatus and technique is based on, device includes anoxic selection pond, electrolytic cell, anaerobic pond, anoxic pond, aerobic tank and the secondary settling tank being set in sequence along sewage flow direction；The present invention, which is realized, selects the operational mode in pond, electrolytic cell, anoxic pond multipoint water feeding in anoxic, increases anoxic before returned sludge is back to anaerobic pond and selects pond, to reduce or eliminate influence of the nitrate to anaerobic phosphorus release process；Increase an electrolytic cell on the inlet pipeline of anaerobic pond, residence time, general control was within half an hour, on the one hand the dissolved oxygen in sewage can be consumed and still retain sufficient carbon source, guarantee that sewage meets anaerobic condition and enters in anaerobic pond, the sewage in anaerobic pond is on the other hand avoided to be impacted by low pH and influence the effective of polyP bacteria and release the nitrification of phosphorus and nitrifier and the denitrification denitrogenation of denitrifying bacterium.Items effluent quality index of the invention reaches and better than national emission standard level-one A standard.
Description
Technical field
The present invention relates to technical field of sewage, are filled more particularly to one kind based on modified form AAO sewage denitrification and dephosphorization
It sets and technique.
Background technique
A/A/O technique is known as anaerobic- anoxic- oxic triplicity system.Early in the seventies U.S. in biological removal of nitrogen method
On the basis of the simultaneous phosphorus and nitrogen removal sewage treatment process that develops.
Biological phosphate-eliminating, is the microorganism using polyP bacteria, and this microorganism can excessively, quantitatively need beyond its physiology
The slave external environment intake phosphorus wanted, phosphorus are housed in thallus in the form of polymerizeing, form high phosphorus sludge outside discharge system, reach
The effect of dephosphorization from sewage.(DO=0, NO3-=0) under anaerobic, the intracorporal ATP of polyP bacteria are hydrolyzed, will
H2PO4 is released, and is formed AOP while also being released energy.Therefore, polyP bacteria, which has, discharges H3PO4 under anaerobic condition, in aerobic item
The function of superfluous intake H3PO4 under part, the biological phosphate-eliminating dephosphorization from sewage that has been exactly this functional development using polyP bacteria
Technology and technique.
Standard biologic denitrification dephosphorization technique is in anaerobism (A1)/anoxic (A2)/aerobic (O) arrangement form, typical process
Process is shown in Fig. 1.The arrangement is theoretically based on such a understanding, it may be assumed that whether poly- phosphorus microorganism effectively releases phosphorus horizontal abundant,
Dephosphorization ability for improving system has extremely important meaning, and anaerobic zone can make poly- phosphorus microorganism preferentially obtain carbon before
Source simultaneously is able to sufficiently release phosphorus.Conventional A/A/O technique has the disadvantage in that 1. nitric acid since anaerobic zone is ranked forefront, in returned sludge
Salt has an adverse effect to anaerobic zone, influences the phosphor-removing effect of system；2. denitrification is in carbon since anoxic zone is located in the middle part of system
Minus advantage is occupy in the distribution of source, thus affects the denitrification effect of system；3. since there are interior circulation, common process system institutes
Actually only have a small part experienced in the excess sludge of discharge completely put phosphorus, inhale phosphorus process, remaining is then substantially without detesting
Oxygen condition and aerobic zone is directly entered by anoxic zone, this is unfavorable for system dephosphorization.
In order to solve the influence that nitrate in A/A/O method returned sludge puts phosphorus etc. to anaerobism, in water intake mode, anaerobism, lack
Oxygen, aerobic section optimize sequence, branch water inlet etc. and improve, and produce improvement A/A/O technique, inversion A/A/O work
Skill, UCT technique, MUCT technique etc..
But a large amount of testing data confirms completely, in Biological Phosphorus Removal Processes, by anaerobic phosphate release hydrochlorate
Activated sludge has very strong suction phosphorus ability under aerobic state, that is to say, that the anaerobism release of phosphorus is aerobic phosphorus absorption and dephosphorization
Premise, but and the anaerobism release of not all phosphorus can enhance the aerobic phosphorus absorption ability of sludge.Meanwhile it will be as far as possible in operational management
The impact of low pH is avoided, otherwise dephosphorization ability is by sharp fall, or even completely loses, when being reduced this is mainly due to pH, meeting
Eucaryotic cell structure and function is caused to be damaged, cell cohesion phosphorus is hydrolyzed in acid condition, so as to cause the quick release of phosphorus.Without
By being conventional A/A/O, or improvement A/A/O technique, inversion A/A/O technique, UCT technique, MUCT technique etc. are most of dirty
Water is all to be sent directly into anaerobic pond to carry out anaerobic phosphorus release, since itself is unstable containing certain oxygen dissolving value or pH value in sewage
It is fixed, lead to not reach expected anaerobic condition, influence whether that the anaerobism of polyP bacteria effectively releases phosphorus, then cause dephosphorization bad and
It is unstable.
Summary of the invention
To overcome technological deficiency of the existing technology, the present invention provides a kind of based on improvement AAO sewage denitrification and dephosphorization dress
It sets and technique.
The technical solution that the present invention uses is:
Based on modified form AAO sewage water denitrification dephosphorization apparatus, the anoxic including being set in sequence along sewage flow direction selects pond, electrolysis
Pond, anaerobic pond, anoxic pond, aerobic tank and secondary settling tank, anoxic selection pond, electrolytic cell, anoxic pond respectively with the dirt after desanding
Water is connected by pipeline, and the aerobic tank outlet is connected between anoxic pond by mixed liquor return flow line, and described two is heavy
Pond outlet is connected with anoxic selection pond by sludge reflux channel.
Preferably, the electrolysis wetting system with Nano diamond electrode is equipped in the electrolytic cell.
Preferably, micro-hole aerator is equipped in the aerobic tank.
Preferably, the secondary settling tank uses circumferential water feed peripheral effluent radical sedimentation basin.
The present invention also provides one kind to be based on modified form AAO process for removing nitrogen and phosphor from sewage, is filled using above-mentioned sewage denitrification and dephosphorization
It sets, detailed process are as follows:
Sewage is sent into anoxic by pipeline respectively after shunting and selects pond, electrolytic cell and anoxic pond after S1, desanding；
S2, amount of activated sludge are back in anoxic selection pond through sludge reflux channel, are sent into anoxic choosing with directly shunting
Sewage mixing after selecting the desanding in pond, carries out denitrification processing, to eliminate the nitrate in returned sludge to anaerobic phosphorus release
It influences；
S3, anoxic selection pond water outlet enter electrolytic cell, mix, lead to sewage after the direct desanding for shunting and being sent into electrolytic cell
Crossing cell reaction and generating has the active hydroxyl radical free radical of Strong oxdiative, and hydroxyl radical free radical and most organic pollutants occur quickly
Chain reaction and harmful substance a part of in sewage is oxidized to CO2、H2O or mineral salt and small organic molecule；
S4, electrolytic cell water outlet enter anaerobic pond, polyP bacteria anaerobic condition be absorbed into Organic substance in water and with internal phosphoric acid
Salt action, by providing energy after phosphate decomposition in polyP bacteria body, synthesis PBH storage in vivo, while releasing phosphorus；
S5, anaerobic pond water outlet enter anoxic pond and mix with the sewage after the direct desanding for shunting and being sent into anoxic pond, instead
Nitrifier carries out denitrification denitrogenation processing under anoxic conditions, so that nitrate nitrogen becomes nitrogen evolution；
S6, anoxic pond water outlet enter aerobic tank, and while heterotroph degradation of organic substances, nitrifier is by the ammonia nitrogen in sewage
Be converted into nitrate nitrogen, polyP bacteria then the phosphorus in excessive consumption sewage and in vivo with polymeric species storage, form high phosphorus sludge；
S7, phosphorus treated mixed liquor a part is inhaled by nitrification be back in anoxic pond through mixed liquor return flow line, separately
A part water outlet enters in secondary settling tank the removal that phosphorus is realized in the form of discharging excess sludge.
Preferably, the anoxic selects the pond residence time for 1.0h~1.3h, the electrolytic cell residence time be 0.3h~
0.5h, the anaerobic pond residence time are 1.6h~1.8h, and the anoxic pond residence time is 3.8h~4.0h, the aerobic tank
Residence time is 10.5h~10.8h.
Preferably, it is 5%~10% that the anoxic, which selects the inflow in pond, the inflow of the electrolytic cell is 70%~
80%, the inflow of the anoxic pond is 10%~25%.
Preferably, the return sludge ratio in step S2 is 80%~100%, and the return current ratio of the mixed liquid in step S7 is
100%~200%.
Beneficial effects of the present invention:
The present invention increases an anoxic selection on conventional AAO Process ba- sis before returned sludge is back to anaerobic pond
Pond, to remove the nitrate being rich in returned sludge, to reduce or eliminate influence of the nitrate to anaerobic phosphorus release process, in turn
It ensure that the effect of high-efficient denitrification and dephosphorization.
The present invention increases an electrolytic cell, when stop also on conventional AAO Process ba- sis on the inlet pipeline of anaerobic pond
Between general control within half an hour, on the one hand can consume the dissolved oxygen in sewage and still retain sufficient carbon source, guarantee dirty
Water meets anaerobic condition and enters in anaerobic pond, and the sewage in anaerobic pond is on the other hand avoided to be impacted by low pH and influence polyP bacteria
Effectively release the nitrification of phosphorus and nitrifier and the denitrification denitrogenation of denitrifying bacterium.
In addition, the water inlet of saprobia reaction tank of the present invention passes through three inlet gates being arranged in irrigation channel first,
Can be adjusted separately according to factors such as TN in water inlet anoxic selection pond, electrolytic cell, anoxic pond inflow, to realize multipoint water feeding
Operational mode, make full use of and consume water inlet in carbon source.
The treatment process of denitrogenation dephosphorizing of the present invention is good to the removal effect of pollutant, and effluent index can be stably held in BOD5
≤ 10mg/L, CODcr≤50mg/L, SS≤10mg/L, ammonia nitrogen≤5mg/L, total phosphorus TP≤0.5mg/L, total nitrogen TN≤15mg/L,
Every effluent quality index reaches and better than national emission standard level-one A standard.
Detailed description of the invention
Fig. 1 is routine AAO process flow chart.
Fig. 2 is process for removing nitrogen and phosphor from sewage flow chart of the present invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
Embodiment 1
As shown in Fig. 2, the present embodiment provides one kind to be based on modified form AAO sewage water denitrification dephosphorization apparatus, including along sewage stream
Pond, electricity are selected to anoxic selection pond, electrolytic cell, anaerobic pond, anoxic pond, aerobic tank and secondary settling tank, the anoxic being set in sequence
Xie Chi, anoxic pond are connected with the sewage after desanding by pipeline respectively, by mixed between the aerobic tank outlet and anoxic pond
It closes liquid return flow line to be connected, the secondary settling tank outlet is connected with anoxic selection pond by sludge reflux channel.
The electrolysis wetting system with Nano diamond electrode is equipped in the electrolytic cell first to lead in purified treatment sewage
Crossing low-voltage electrolysis reaction can directly or indirectly generate in anode with the active hydroxyl radical free radical of Strong oxdiative, because its have it is high
Oxidizing potential, oxidability is extremely strong, quick chain reaction can occur with most organic pollutants, harmful substance
It is oxidized to CO2、H2O or mineral salt and small organic molecule, it is without secondary pollution, while also helping lifting sewage pH, about 0.5, it can
There is the case where low ph value to improve sewage in raw water and treatment process, guarantees to inhale phosphorus effect.
Aeration is an important technical process in sewage aerobic biological treatment system, and blast aeration system is widely used at present
System, purified air is provided by air blower, the dedicated micro-hole aerator of aerobic bottom of pond portion is sent by pipe-line system.It is dedicated micro-
The effect of hole aerator is that air is dispersed into bubble, is diffused into mixed liquor, is dissolved into the oxygen in bubble in mixed liquor, mentions
For dissolved oxygen required for microbial biochemical reaction, while guaranteeing being sufficiently mixed for sewage, activated sludge made to be in suspended state,
Come into full contact with by mud, water, gas three-phase, guarantee activated sludge make full use of dissolved oxygen in water come decomposing organic pollutant and
Nutrients containing N/P, therefore, aeration effect it is good.It is equipped with micro-hole aerator in the embodiment of the present invention aerobic tank, specially manages
Micro-porous aerator, type micro-pore aerator is that gas transmission and gas distribution are combined into one, using the aerating system of type micro-pore aerator
It does not need to be laid with special horizontal gas pipeline.
The secondary settling tank uses circumferential water feed peripheral effluent radical sedimentation basin.Circumferential water feed peripheral effluent radial-flow type sedimentation
Pond inflow area is located at the periphery in pond, and spout is located at the periphery of sedimentation basin, can be divided into 5 areas according to its function: flow into slot, water conservancy diversion
Flocculation zone, settling zone, spout, sludge area.It flows into slot peripherally to arrange, slot bottom equably opens up water distribution also and short tube, for cloth
Water is used.Water conservancy diversion flocculation zone mainly has 3 effects: making to be oriented to settling zone into water and keeps water distribution uniform；It is also and short from water distribution because intaking
After pipe enters water conservancy diversion flocculation zone, reflux is formed in area, and active mud can be promoted to flocculate, accelerate the precipitating of settling zone；Because of the area
Discharge area is larger, therefore defluent flow velocity is small, sinks mud without rushing phenomenon to bottom of pond.The function of settling zone has been mainly that precipitating is made
With further, since the water (flow) direction that settling zone flows down is centripetal stream, therefore the sludge bucket that precipitating sludge can be pushed to center is convenient for row
Mud.The better position of spout is generally located at the radius equal to pond, may be alternatively provided at R/2, R/3, R/4, different spouts
Position, volumetric efficiency slightly have difference, according to field data, when the position of its spout is located at the radius equal to pond
When, volumetric efficiency 93.6%, significantly larger than center water inlet peripheral effluent radical sedimentation basin.With center water inlet periphery
The radical sedimentation basin of water outlet is compared, and design surface load can be improved 1 times or so.
Embodiment 2
As shown in Fig. 2, the present embodiment provides one kind to be based on modified form AAO process for removing nitrogen and phosphor from sewage, using such as embodiment 1
The sewage water denitrification dephosphorization apparatus, water temperature control is at 15 DEG C~20 DEG C, activated sludge age 15d, detailed process are as follows:
Sewage is sent into anoxic by pipeline respectively after shunting and selects pond, electrolytic cell and anoxic pond after S1, desanding, wherein institute
Stating anoxic and selecting the inflow in pond is 5%, and the inflow of the electrolytic cell is 75%, and the inflow of the anoxic pond is 20%；
S2, amount of activated sludge are back in anoxic selection pond through sludge reflux channel, return sludge ratio 100%, with
The sewage mixing after being sent into the desanding in anoxic selection pond is directly shunted, denitrification processing is carried out, to eliminate in returned sludge
Influence of the nitrate to anaerobic phosphorus release, residence time 1.3h；
S3, anoxic selection pond water outlet enter electrolytic cell, mix, lead to sewage after the direct desanding for shunting and being sent into electrolytic cell
Crossing cell reaction and generating has the active hydroxyl radical free radical of Strong oxdiative, and hydroxyl radical free radical and most organic pollutants occur quickly
Chain reaction and harmful substance a part of in sewage is oxidized to CO2、H2O or mineral salt and small organic molecule, when stop
Between be 0.3h, unsuitable too long in the hydraulic detention time of electrolytic cell, on the one hand general control can consume dirt within half an hour
Dissolved oxygen in water and still retain sufficient carbon source, guarantees that sewage meets anaerobic condition and enters in anaerobic pond, on the other hand avoid
Sewage in anaerobic pond is impacted by low pH and influences the effective of polyP bacteria and release phosphorus；
S4, electrolytic cell water outlet enter anaerobic pond, polyP bacteria anaerobic condition be absorbed into Organic substance in water and with internal phosphoric acid
Salt action, by providing energy after phosphate decomposition in polyP bacteria body, synthesis PBH storage in vivo, while releasing phosphorus, the residence time
For 1.7h, on the one hand guarantee being released effectively for phosphorus, the facultative acidification bacterium in another aspect sludge is fully by big point in sewage
Sub- organic matter resolves into lower fatty acid, for polyP bacteria intake；
S5, anaerobic pond water outlet enter anoxic pond and mix with the sewage after the direct desanding for shunting and being sent into anoxic pond, instead
Nitrifier carries out denitrification denitrogenation processing under anoxic conditions, so that nitrate nitrogen becomes nitrogen evolution, residence time 4.0h；
S6, anoxic pond water outlet enter aerobic tank, and while heterotroph degradation of organic substances, nitrifier is by the ammonia nitrogen in sewage
Be converted into nitrate nitrogen, polyP bacteria then the phosphorus in excessive consumption sewage and in vivo with polymeric species storage, form high phosphorus sludge, stop
Staying the time is 10.7h；
S7, phosphorus treated mixed liquor a part is inhaled by nitrification be back in anoxic pond through mixed liquor return flow line, mix
Closing liquid reflux ratio is 150%, and another part water outlet enters in secondary settling tank the removal that phosphorus is realized in the form of discharging excess sludge.
Embodiment 3
As shown in Fig. 2, the present embodiment provides one kind to be based on modified form AAO process for removing nitrogen and phosphor from sewage, using such as embodiment 1
The sewage water denitrification dephosphorization apparatus, water temperature control is at 15 DEG C~20 DEG C, activated sludge age 15d, detailed process are as follows:
Sewage is sent into anoxic by pipeline respectively after shunting and selects pond, electrolytic cell and anoxic pond after S1, desanding, wherein institute
Stating anoxic and selecting the inflow in pond is 10%, and the inflow of the electrolytic cell is 80%, and the inflow of the anoxic pond is 10%；
S2, amount of activated sludge are back in anoxic selection pond through sludge reflux channel, and return sludge ratio 90% is and straight
The sewage mixing shunted after being sent into the desanding in anoxic selection pond is connect, denitrification processing is carried out, to eliminate the nitre in returned sludge
Influence of the hydrochlorate to anaerobic phosphorus release, residence time 1.0h；
S3, anoxic selection pond water outlet enter electrolytic cell, mix, lead to sewage after the direct desanding for shunting and being sent into electrolytic cell
Crossing cell reaction and generating has the active hydroxyl radical free radical of Strong oxdiative, and hydroxyl radical free radical and most organic pollutants occur quickly
Chain reaction and harmful substance a part of in sewage is oxidized to CO2、H2O or mineral salt and small organic molecule, when stop
Between be 0.3h；
Unsuitable too long in the hydraulic detention time of electrolytic cell, on the one hand general control can consume dirt within half an hour
Dissolved oxygen in water and still retain sufficient carbon source, guarantees that sewage meets anaerobic condition and enters in anaerobic pond, on the other hand avoid
Sewage in anaerobic pond is impacted by low pH and influences the effective of polyP bacteria and release phosphorus；
S4, electrolytic cell water outlet enter anaerobic pond, polyP bacteria anaerobic condition be absorbed into Organic substance in water and with internal phosphoric acid
Salt action, by providing energy after phosphate decomposition in polyP bacteria body, synthesis PBH storage in vivo, while releasing phosphorus, the residence time
For 1.6h；
S5, anaerobic pond water outlet enter anoxic pond and mix with the sewage after the direct desanding for shunting and being sent into anoxic pond, instead
Nitrifier carries out denitrification denitrogenation processing under anoxic conditions, so that nitrate nitrogen becomes nitrogen evolution, residence time 3.8h；
S6, anoxic pond water outlet enter aerobic tank, and while heterotroph degradation of organic substances, nitrifier is by the ammonia nitrogen in sewage
Be converted into nitrate nitrogen, polyP bacteria then the phosphorus in excessive consumption sewage and in vivo with polymeric species storage, form high phosphorus sludge, stop
Staying the time is 10.5h；
S7, phosphorus treated mixed liquor a part is inhaled by nitrification be back in anoxic pond through mixed liquor return flow line, mix
Closing liquid reflux ratio is 200%, and another part water outlet enters in secondary settling tank the removal that phosphorus is realized in the form of discharging excess sludge.
Embodiment 4
As shown in Fig. 2, the present embodiment provides one kind to be based on modified form AAO process for removing nitrogen and phosphor from sewage, using such as embodiment 1
The sewage water denitrification dephosphorization apparatus, water temperature control is at 15 DEG C~20 DEG C, activated sludge age 15d, detailed process are as follows:
Sewage is sent into anoxic by pipeline respectively after shunting and selects pond, electrolytic cell and anoxic pond after S1, desanding, wherein institute
Stating anoxic and selecting the inflow in pond is 5%, and the inflow of the electrolytic cell is 70%, and the inflow of the anoxic pond is 25%；
S2, amount of activated sludge are back in anoxic selection pond through sludge reflux channel, and return sludge ratio 80% is and straight
The sewage mixing shunted after being sent into the desanding in anoxic selection pond is connect, denitrification processing is carried out, to eliminate the nitre in returned sludge
Influence of the hydrochlorate to anaerobic phosphorus release, residence time 1.2h；
S3, anoxic selection pond water outlet enter electrolytic cell, mix, lead to sewage after the direct desanding for shunting and being sent into electrolytic cell
Crossing cell reaction and generating has the active hydroxyl radical free radical of Strong oxdiative, and hydroxyl radical free radical and most organic pollutants occur quickly
Chain reaction and harmful substance a part of in sewage is oxidized to CO2、H2O or mineral salt and small organic molecule, when stop
Between be 0.3h；
Unsuitable too long in the hydraulic detention time of electrolytic cell, on the one hand general control can consume dirt within half an hour
Dissolved oxygen in water and still retain sufficient carbon source, guarantees that sewage meets anaerobic condition and enters in anaerobic pond, on the other hand avoid
Sewage in anaerobic pond is impacted by low pH and influences the effective of polyP bacteria and release phosphorus；
S4, electrolytic cell water outlet enter anaerobic pond, polyP bacteria anaerobic condition be absorbed into Organic substance in water and with internal phosphoric acid
Salt action, by providing energy after phosphate decomposition in polyP bacteria body, synthesis PBH storage in vivo, while releasing phosphorus, the residence time
For 1.8h；
S5, anaerobic pond water outlet enter anoxic pond and mix with the sewage after the direct desanding for shunting and being sent into anoxic pond, instead
Nitrifier carries out denitrification denitrogenation processing under anoxic conditions, so that nitrate nitrogen becomes nitrogen evolution, residence time 4.0h；
S6, anoxic pond water outlet enter aerobic tank, and while heterotroph degradation of organic substances, nitrifier is by the ammonia nitrogen in sewage
Be converted into nitrate nitrogen, polyP bacteria then the phosphorus in excessive consumption sewage and in vivo with polymeric species storage, form high phosphorus sludge, stop
Staying the time is 10.8h；
S7, phosphorus treated mixed liquor a part is inhaled by nitrification be back in anoxic pond through mixed liquor return flow line, mix
Closing liquid reflux ratio is 120%, and another part water outlet enters in secondary settling tank the removal that phosphorus is realized in the form of discharging excess sludge.
The technological design that 2-4 of the embodiment of the present invention is used can be achieved effluent index and reach " urban wastewater treatment firm pollution
Object discharge standard " GB18918-2002 level-one A standard, specific to each embodiment respectively referring to table 1-3.
Table 1: 2 Inlet and outlet water water quality average value of the embodiment of the present invention
| Index | CODcr | BOD5 | SS | TN | TP | NH3-N |
| Water inlet mg/L | 180 | 76 | 98 | 32 | 3.1 | 28 |
| It is discharged mg/L | 24 | 4.3 | 8.8 | 5.6 | 0.32 | 1.7 |
| Removal rate % | 86.7 | 94.3 | 91.0 | 82.5 | 89.7 | 93.9 |
Table 2: 3 Inlet and outlet water water quality average value of the embodiment of the present invention
| Index | CODcr | BOD5 | SS | TN | TP | NH3-N |
| Water inlet mg/L | 180 | 76 | 98 | 32 | 3.1 | 28 |
| It is discharged mg/L | 26.2 | 3.8 | 8.5 | 5.1 | 0.36 | 2.1 |
| Removal rate % | 85.4 | 95.0 | 91.3 | 84.0 | 83.4 | 92.5 |
Table 3: 4 Inlet and outlet water water quality average value of the embodiment of the present invention
| Index | CODcr | BOD5 | SS | TN | TP | NH3-N |
| Water inlet mg/L | 180 | 76 | 98 | 32 | 3.1 | 28 |
| It is discharged mg/L | 22.2 | 5.3 | 8.1 | 4.8 | 0.28 | 2.3 |
| Removal rate % | 87.7 | 93.0 | 91.7 | 85.0 | 90.1 | 91.8 |
The basic principles and main features and advantages of the present invention of the invention have been shown and described above, the industry
For technical staff it should be appreciated that the present invention is not limited to the above embodiments, what is described in the above embodiment and the description is only say
Bright the principle of the present invention, under the premise of not departing from the inventive spirit of the present invention and range, the present invention also has various change and changes
Into these changes and improvements all fall within the protetion scope of the claimed invention, and the claimed scope of the invention is by appended right
Claim and its equivalent thereof.
Claims (8)
1. being based on modified form AAO sewage water denitrification dephosphorization apparatus, which is characterized in that the sewage water denitrification dephosphorization apparatus includes along sewage stream
Pond, electricity are selected to anoxic selection pond, electrolytic cell, anaerobic pond, anoxic pond, aerobic tank and secondary settling tank, the anoxic being set in sequence
Xie Chi, anoxic pond are connected with the sewage after desanding by pipeline respectively, by mixed between the aerobic tank outlet and anoxic pond
It closes liquid return flow line to be connected, the secondary settling tank outlet is connected with anoxic selection pond by sludge reflux channel.
2. according to claim 1 be based on modified form AAO sewage water denitrification dephosphorization apparatus, which is characterized in that the electrolytic cell
It is interior to be equipped with the electrolysis wetting system with Nano diamond electrode.
3. according to claim 1 be based on modified form AAO sewage water denitrification dephosphorization apparatus, which is characterized in that the aerobic tank
It is interior to be equipped with micro-hole aerator.
4. according to claim 1 be based on modified form AAO sewage water denitrification dephosphorization apparatus, which is characterized in that the secondary settling tank
Using circumferential water feed peripheral effluent radical sedimentation basin.
5. being based on modified form AAO process for removing nitrogen and phosphor from sewage, which is characterized in that use sewage water denitrification as described in claim 1
Dephosphorization apparatus, detailed process are as follows:
Sewage is sent into anoxic by pipeline respectively after shunting and selects pond, electrolytic cell and anoxic pond after S1, desanding；
S2, amount of activated sludge are back in anoxic selection pond through sludge reflux channel, are sent into anoxic selection pond with directly shunting
Sewage mixing after interior desanding, carries out denitrification processing, to eliminate influence of the nitrate in returned sludge to anaerobic phosphorus release；
S3, anoxic selection pond water outlet enter electrolytic cell, mix with sewage after the direct desanding for shunting and being sent into electrolytic cell, pass through electricity
Solution reaction, which generates, has the active hydroxyl radical free radical of Strong oxdiative, and quick chain occurs for hydroxyl radical free radical and most organic pollutants
Formula reacts and harmful substance a part of in sewage is oxidized to CO2、H2O or mineral salt and small organic molecule；
S4, electrolytic cell water outlet enter anaerobic pond, and polyP bacteria is absorbed into Organic substance in water in anaerobic condition and makees with internal phosphate
With by providing energy after phosphate decomposition in polyP bacteria body, synthesis PBH storage in vivo, while releasing phosphorus；
S5, anaerobic pond water outlet enter anoxic pond and mix with the sewage after the direct desanding for shunting and being sent into anoxic pond, denitrification
Bacterium carries out denitrification denitrogenation processing under anoxic conditions, so that nitrate nitrogen becomes nitrogen evolution；
S6, anoxic pond water outlet enter aerobic tank, and while heterotroph degradation of organic substances, nitrifier is by the mineralized nitrogen in sewage
For nitrate nitrogen, polyP bacteria then the phosphorus in excessive consumption sewage and in vivo with polymeric species storage, form high phosphorus sludge；
S7, phosphorus treated mixed liquor a part is inhaled by nitrification be back in anoxic pond through mixed liquor return flow line, another portion
It separates water and enters in secondary settling tank the removal for realizing phosphorus in the form of discharging excess sludge.
6. according to claim 5 be based on modified form AAO process for removing nitrogen and phosphor from sewage, which is characterized in that the anoxic choosing
Selecting the pond residence time is 1.0h~1.3h, and the electrolytic cell residence time is 0.3h~0.5h, and the anaerobic pond residence time is
1.6h~1.8h, the anoxic pond residence time are 3.8h~4.0h, and the aerobic tank residence time is 10.5h~10.8h.
7. according to claim 5 be based on modified form AAO process for removing nitrogen and phosphor from sewage, which is characterized in that the anoxic choosing
The inflow for selecting pond is 5%~10%, and the inflow of the electrolytic cell is 70%~80%, and the inflow of the anoxic pond is
10%~25%.
8. according to claim 5 be based on modified form AAO process for removing nitrogen and phosphor from sewage, which is characterized in that in step S2
Return sludge ratio is 80%~100%, and the return current ratio of the mixed liquid in step S7 is 100%~200%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910350631.9A CN110217939B (en) | 2019-04-28 | 2019-04-28 | Improved AAO-based sewage nitrogen and phosphorus removal device and process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910350631.9A CN110217939B (en) | 2019-04-28 | 2019-04-28 | Improved AAO-based sewage nitrogen and phosphorus removal device and process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110217939A true CN110217939A (en) | 2019-09-10 |
| CN110217939B CN110217939B (en) | 2020-06-02 |
Family
ID=67820203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910350631.9A Active CN110217939B (en) | 2019-04-28 | 2019-04-28 | Improved AAO-based sewage nitrogen and phosphorus removal device and process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110217939B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113173643A (en) * | 2021-04-22 | 2021-07-27 | 浙江工业大学 | Method for efficiently and stably degrading DBP in landfill leachate based on A/A/O system |
| WO2023245897A1 (en) * | 2022-06-23 | 2023-12-28 | 广东邦普循环科技有限公司 | Backflow unit and sewage treatment system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020040871A1 (en) * | 2000-10-06 | 2002-04-11 | Premier Wastewater International, Llc. | Apparatus and method for wastewater treatment with enhanced solids reduction (ESR) |
| CN104341075A (en) * | 2013-08-01 | 2015-02-11 | 中国环境科学研究院 | Variable-volume improved A<2>/O deep nitrogen and phosphorus removal process for sewage |
-
2019
- 2019-04-28 CN CN201910350631.9A patent/CN110217939B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020040871A1 (en) * | 2000-10-06 | 2002-04-11 | Premier Wastewater International, Llc. | Apparatus and method for wastewater treatment with enhanced solids reduction (ESR) |
| CN104341075A (en) * | 2013-08-01 | 2015-02-11 | 中国环境科学研究院 | Variable-volume improved A<2>/O deep nitrogen and phosphorus removal process for sewage |
Non-Patent Citations (1)
| Title |
|---|
| 马斌等: "ZVI强化厌氧处理高浓度颜料废水", 《环境工程学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113173643A (en) * | 2021-04-22 | 2021-07-27 | 浙江工业大学 | Method for efficiently and stably degrading DBP in landfill leachate based on A/A/O system |
| WO2023245897A1 (en) * | 2022-06-23 | 2023-12-28 | 广东邦普循环科技有限公司 | Backflow unit and sewage treatment system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110217939B (en) | 2020-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105217786B (en) | Based on DEAMOX reinforcing improvement subsection water inflow As2The apparatus and method of/O technique biological carbon and phosphorous removals | |
| CN100503470C (en) | Control method and device of A2/O oxidation trench technology synchronous nitration and denitrification | |
| CN106746174A (en) | A kind of kitchen garbage slurry anaerobic fermentation method of wastewater treatment | |
| CN109205954A (en) | Light electrolysis catalysis oxidation, biochemical treatment high-concentration waste hydraulic art | |
| CN106565017A (en) | Bicirculating nitrogen and phosphorus removal wastewater treatment system and method | |
| CN104817177A (en) | Integrated anaerobic ammoxidation/denitrification/dephosphorization parallel short-range nitration low-carbon municipal sewage treatment device and method | |
| CN106430845A (en) | Kitchen garbage wastewater treatment apparatus | |
| CN109626746A (en) | The middle-size and small-size multipoint water feeding advanced nitrogen dephosphorization sewage disposal system of integration and processing method | |
| CN209226777U (en) | A kind of reinforcing advanced nitrogen dephosphorization process sewage-treatment plant | |
| CN202688093U (en) | Improved A/O (anoxic/oxic) four-point section-water supply high-efficiency synchronous nitrogen and phosphorus removal device | |
| CN106045030B (en) | A2The apparatus and method of/O-UASB continuous flow city domestic sewage advanced nitrogen dephosphorization | |
| CN110217939A (en) | Based on modified form AAO sewage water denitrification dephosphorization apparatus and technique | |
| CN110217892A (en) | Process for removing nitrogen and phosphor from sewage based on integrated biochemical reaction tank | |
| CN102259981B (en) | Sequencing batch biological phosphorus and nitrogen removal process | |
| CN201325907Y (en) | Sewage treatment system for oxidation ditch | |
| CN105130092B (en) | Treatment device and method for degradation and nitrogen removal of printing and dyeing wastewater high-concentration organic matters | |
| US20240059597A1 (en) | Anaerobic ammonia oxidation treatment system for treating wastewater with high ammonia nitrogen and high cod | |
| CN108862588A (en) | Continuous flow short distance nitration parallel connection integral anaerobic ammoxidation denitrification dephosphorization SBBR technique | |
| CN205999129U (en) | Integral domestic sewage treatment device | |
| CN112551828A (en) | Low-carbon-nitrogen-ratio rural domestic sewage treatment device and treatment process thereof | |
| CN106396105A (en) | Multi-mode reaction tank for sewage treatment | |
| CN102276062A (en) | Multistage anaerobic and anoxic circulating final segment aerobic activated sludge process | |
| CN110981078A (en) | Continuous flow device and method for realizing urban sewage denitrification coupled with biological phosphorus removal by utilizing anaerobic ammonia oxidation | |
| CN102249412B (en) | Multistage anoxic and anaerobic circulation tail section anoxic activated sludge treatment process and system | |
| CN214880540U (en) | Wastewater denitrification treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |