CN105776544B - A kind of ANSAOAO continuous flow double sludge denitrification advanced nitrogen dephosphorization apparatus and technique based on On-line Control - Google Patents
A kind of ANSAOAO continuous flow double sludge denitrification advanced nitrogen dephosphorization apparatus and technique based on On-line Control Download PDFInfo
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- CN105776544B CN105776544B CN201610296822.8A CN201610296822A CN105776544B CN 105776544 B CN105776544 B CN 105776544B CN 201610296822 A CN201610296822 A CN 201610296822A CN 105776544 B CN105776544 B CN 105776544B
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- 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
Abstract
The present invention relates to a kind of ANSAOAO continuous flow double sludge denitrification advanced nitrogen dephosphorization apparatus and technique based on On-line Control, which includes regulating reservoir, anaerobic pond, first stage precipitation tank, biological aerated filter, aerobic-anoxic selection pond, level-one anoxic pond, level-one aeration tank, two level anoxic pond, two-stage aeration tank, second-level settling pond, clear water reserviors, oxidation reduction potential determination control system, DO determination control system, aerating system, nitrification terminal point control system, water outlet orthophosphoric acid root measure control system and industrial PC;The device is based on double sludge denitrification denitrogenation dephosphorizing principle, it is utilized that anaerobic phosphorus release, the secondary settlement of sludge, sludge segmentation surmounts, denitrification denitrogenation inhales phosphorus, aerobic phosphorus absorption, the nitrification control of terminal of continuous flow aeration tank, the control of the low Ammonia Nitrification liquid of hypoxemia and oxidation reduction potential control control the technologies such as combined control system with water outlet orthophosphoric acid root, realizes the effect of the advanced nitrogen dephosphorization of sewage.
Description
Technical field
The invention belongs to technical field of sewage, are related to the advanced nitrogen dephosphorization purifying device and work of a kind of sanitary sewage
Skill is suitable for sewage plant grassroot project, and in particular to a kind of lower based on on-line monitoring and control, foundation denitrification nitrogen and phosphorus removal
Principle carries out the device and its technique of secondary denitrification nitrogen and phosphorus removal.
Background technology
At present, China implements《Urban wastewater treatment firm pollutant emission standard》In, highest level-one emission standard A is only
Bad five class of surface water is equivalent to, domestic current sewage plant prevailing technology is mainly two stage treatment such as AB methods, oxidation ditch process, A/
O techniques, A/A/O techniques, SBR methods etc., these techniques obviously can not realize the nitrogen phosphorus purification of depth.Therefore, even if various regions are all real
Rain sewage diversion is applied, the perfect condition that sanitary sewage is handled entirely is still difficult to achieve the purpose that improve and rehabilitate urban water-body.These
Sewage plant discharges bad five classes water and damages to the ecology and landscape of surface water, water body is influenced using function, to the water of underground water
Matter causes potential threat.As the requirement of quality of water environment of the people to producing and living is higher and higher, at China's sewage
Reason discharge standard will gradually integrate with surface water quality grade.Due to the tertiary treatment process of sewage it is high investment and it is high
Processing cost, it is difficult to be promoted on a large scale.Therefore, sewage is directly reached into 5 class more than water of surface water by biochemical treatment
It will be one of fundamental solution for solving the problems, such as China's water environment pollution and existing that the new process of matter standard and the research of new technology, which are,
Stage Study on Water Pollution Control focus and emphasis.
In recent years, automatic control technology is developed rapidly and is widely used, but sewage treatment process control technology,
Due to being related to the complex conditions of the multi-environment variation of multi-parameter, the primary stage of research and development is also in, especially while denitrogenation
The rarely found report of control technique of dephosphorization.Accurate terminal and process control are carried out with computer in sewage treatment process,
The optimum condition condition of denitrogenation dephosphorizing is maintained, is had great importance for the advanced nitrogen dephosphorization of sewage disposal.
Double sludge denitrification denitrification dephosphorization technique is a kind of sewage treatment process that can take into account denitrogenation and dephosphorization simultaneously, this
Two kinds of microorganisms of nitrification and denitrification are divided among suitable environment culture by technique.The organic carbon source in sewage is fully utilized,
By being constantly enriched with DPAOs under anaerobic/anoxic alternation condition, internal carbon source PHA is synthesized using VFAs in raw water under anaerobic,
And excessive suction phosphorus reaction is completed by the PHA in electron acceptor oxygenolysis body of nitrate under anoxic conditions.This causes denitrogenation
With dephosphorization can synchronize removed, solve the problems, such as it is insufficient to domestic sewage denitrifying-dephosphorizing carbon source using conventional method, tool
There is the features such as efficient, low energy consumption, low sludge output, be more concerned at present, a kind of very promising biological carbon and phosphorous removal is new
Technology.Double sludge denitrification denitrogenation dephosphorizing main representative technique is A2N and Dephanox techniques.
Existing continuous flow double sludge denitrification denitrification dephosphorization technique has following two shortcomings:First, due to surmounting sludge
The a large amount of ammonia nitrogens carried so that water outlet ammonia nitrogen and nitrate concentration are higher, are difficult to realize the denitrogenation dephosphorizing of depth;Second, two is heavy
The sedimentation of denitrification generation nitrogen influence sludge easily occurs for pond sludge and influent quality changes and influences whether sewage
It is unstable to cause effluent quality for treatment effect.Third, existing double sludge denitrification denitrification dephosphorization technique are controlled due to automation
Processing procedure degree is not high, is suitable only for sewage of the processing carbon-nitrogen ratio in particular range, when carbon-nitrogen ratio varies widely, is discharged water
Matter is difficult to ensure.
Therefore, how to improve the clean-up effect of nitrogen phosphorus and how to solve the unstable situation of effluent quality, be double at present dirty
The problem of mud denitrification nitrogen and phosphorus removal sewage treatment process urgent need to resolve.
Invention content
The present invention can not realize advanced nitrogen dephosphorization for denitrification nitrogen and phosphorus removals techniques such as existing A2N and Dephanox,
The problem of effluent quality is unstable provides a kind of ANSAOAO (Anaerobic-Nitrifying-Selective-Anoxic-
Oxic-Anoxic-Oxic) continuous flow double sludge denitrification advanced nitrogen dephosphorization apparatus and technique, the device and technological basis are double
Based on On-line Control technology, anaerobic phosphorus release, the secondary settlement of sludge, sludge point is utilized in sludge denitrification denitrogenation dephosphorizing principle
Duan Chaoyue denitrifying phosphorus uptake denitrogenations technology, aerobic phosphorus absorption technology, the control technology of continuous flow aeration tank nitrification terminal, the low ammonia of hypoxemia
The denitrogenation combined with water outlet orthophosphoric acid root control system of the control technology and oxidation reduction potential control system of nitrogen nitrification liquid
Dephosphorization technique realizes the effect of the advanced nitrogen dephosphorization of sanitary sewage.
A kind of ANSAOAO continuous flow double sludge denitrification advanced nitrogen dephosphorization apparatus based on On-line Control, including adjusting
Pond, anaerobic pond, first stage precipitation tank, biological aerated filter, aerobic-anoxic selection pond, level-one anoxic pond, level-one aeration tank, two level lack
Oxygen pond, two-stage aeration tank, second-level settling pond, clear water reserviors, oxidation reduction potential determination control system, DO determination control system
System, nitrification terminal point control system, aerating system, water outlet orthophosphoric acid root measure control system and industrial PC;
The water inlet end of regulating reservoir is connected with water inlet pipe, and the water outlet of regulating reservoir is by carrying the pipeline and anaerobic pond of intake pump
Water inlet end be connected;The water outlet of anaerobic pond is connected with the water inlet end of first stage precipitation tank by pipeline;
First stage precipitation tank supernatant water outlet is connected by pipeline with the water distributor above biological aerated filter;
The discharge outlet of biological aerated filter bottom is selected by carrying the pipeline of nitrification liquid normally open solenoid valve with aerobic-anoxic
The water inlet end connection in pond;
Aerobic-anoxic selection pond, level-one anoxic pond, level-one aeration tank, two level anoxic pond, two-stage aeration tank, second-level settling pond
Sequentially it is connected successively by pipeline;
The supernatant water outlet of the second-level settling pond is connected by pipeline with the water inlet end of clear water reserviors;
The water outlet of clear water reserviors is connected with drainpipe;The lower section discharge outlet of clear water reserviors, backwashing solenoid valve, backwashing pump and
Biological aerated filter bottom discharge mouth is sequentially connected successively by pipeline;Biological aerated filter bottom is also associated with mud valve
Pipeline;
The pipeline that the bottom mud discharging mouth of second-level settling pond returns to pump by carrying sludge is connected with the water inlet end of anaerobic pond;Two
The bottom mud discharging mouth of grade sedimentation basin is also connected with the pipeline with sludge pump;
By carrying, the first sludge surmounts the pipeline of pump to the bottom mud discharging mouth of first stage precipitation tank and aerobic-anoxic selects pond
Water inlet end is connected;The bottom mud discharging mouth of first stage precipitation tank also surmounts the pipeline of pump and two level anoxic pond by carrying the second sludge
Water inlet end is connected;
The pipeline that first sludge surmounts pump with the water inlet end in aerobic-anoxic selection pond is connected is equipped with sludge electromagnetic flowmeter,
Second sludge, which surmounts, also is provided with sludge electromagnetic flowmeter, and two sludge on the pipeline that pump is connected with the water inlet end of two level anoxic pond
The communication ends of electromagnetic flowmeter are connected with industrial PC communication ends;Industrial PC is also surpassed by frequency converter and the first sludge respectively
More pump, the second sludge surmount pump and are connected;
The regulating reservoir, anaerobic pond, aerobic-anoxic selection pond, level-one anoxic pond, level-one aeration tank, two level anoxic pond and
Submersible agitator is equipped in two-stage aeration tank;
Regulating reservoir, anaerobic pond, aerobic-anoxic selection pond, level-one anoxic pond and the two level anoxic pond seals, and detest
Exhaust is equipped at the top of the top in oxygen pond, the top in aerobic-anoxic selection pond, the top of level-one anoxic pond and two level anoxic pond
Pipe;For discharging the gas that anaerobic pond, level-one anoxic pond and two level anoxic pond generate.
The oxidation reduction potential determination control system has four sets, often covers oxidation reduction potential determination control system and includes
The oxidation-reduction electrode and on-line oxidation reduction potential meter being connected;The oxidation of 4 sets of oxidation reduction potential determination control systems is also
Primary electrode is respectively arranged on the water outlet of anaerobic pond, the water outlet of level-one anoxic pond, the water outlet of two level anoxic pond and two level aeration
The water outlet in pond;The corresponding oxygen in on-line oxidation reduction potential meter one end in 4 sets of oxidation reduction potential determination control systems
Change reducing electrode to be connected, the other end is connected with industrial PC communication ends;
The DO determination control system includes the dissolved oxygen electrode being connected and online dissolved oxygen instrument, and described is molten
It solves oxygen electrode to be set between the water outlet of biological aerated filter and the water inlet end in aerobic-anoxic selection pond in pipeline, dissolved oxygen electrode
It is connected with the output terminal of online dissolved oxygen instrument, the input terminal of the online dissolved oxygen instrument is connected with industrial PC communication ends;
The nitrification terminal point control system is located at one including the pH electrodes being connected and online pH analyzers, pH electrodes
The water outlet of grade aeration tank;PH electrodes are connected with the measuring signal end of online pH analyzers, and the online pH analyzers lead to
Letter end is connected with industrial PC communication ends;
The aerating system has 4 sets, often covers aerating system and includes the aeration head, gas flowmeter, the aeration that are sequentially connected
Pump and frequency converter, aeration pump are connected with the output terminal of frequency converter;Aeration head in 4 sets of aerating systems is respectively arranged on aeration and biological
In the filler of filter tank, bottom in aerobic-anoxic selection pond, in level-one aeration tank bottom in bottom and two-stage aeration tank;4 sets of aeration systems
The communication ends of frequency converter in system are connected with industrial PC communication ends;
Water outlet phosphate radical measures control system and is arranged on including sampling pipe and online phosphate radical monitor, one end of sampling pipe
In clear water reserviors, the other end of sampling pipe is connected with the water inlet end of online phosphate radical monitor, the communication of online phosphate radical monitor
End is connected with industrial PC communication ends.
It is further preferred that between the industrial PC and on-line oxidation reduction potential meter, industrial PC and frequency conversion
Between device, between industrial PC and online dissolved oxygen instrument, between industrial PC and online pH analyzers and industrial PC with electricity
Electrical connection between magnetic flowmeter is connected by communication using 485.
It is further preferred that biological aerated filter top be cylinder type, lower part be the cone angle of same diameter be 60 ° fall
The joint of cone, circular cone and cylinder is horizontally disposed with stainless steel sieve tray, mesh size 5mm, and filler shape is loaded on sieve tray
Into packing layer, packing material size 0.6-1.5cm;Water distributor is equipped with right over packing layer;Wherein, the filler for volcanic rock,
Haydite, quartz sand or zeolite.
It is further preferred that (aeration head is for normally exposure for the aeration head in the aerating biological filter pool filler
Gas) it is arranged on above sieve tray, and be the 1/3 of filler layer thickness with the distance of sieve tray.Above the aeration head being normally aerated
Filler is in aerobic aeration state, and nitration reaction mainly occurs, and is aerobic nitrification zone, and filling out below normal aeration head
The bed of material is not aerated, can only by nitrification water in remaining ammonia nitrogen and nitrite anions, consume water in dissolved oxygen, be deoxidation
Area.
It is further preferred that the top of the biological aerated filter is equipped with drain valve, and drain valve is located at packing layer
Top;
The aeration pump being connected with aeration head in aerating biological filter pool filler, the also pipeline by carrying normally closed gas solenoid valve
It is connected with backwash with aeration head;Backwash aeration head (aeration head is aerated when being used for and backwashing) setting filler
Bottom, and in the top of sieve tray;In the aerating biological filter pool filler between aeration head and coupled aeration pump
Normally opened gas solenoid valve is additionally provided on pipeline.
It is further preferred that it is equipped with mud scraper in first stage precipitation tank and second-level settling pond.Mud scraper is by decelerating motor
Drive slowly runs, and rotating speed is advisable with not stirring sludge.Mud scraper scrapes mud including decelerating motor, central shaft, cleaning shoe and support
The supporting rack of plate, cleaning shoe are that the scraper plate rotated around sedimentation basin center is made along the taper area edge of sedimentation basin.Mud scraper it is main
Effect is that the sludge at sedimentation basin bottom pyramidal edge is scraped to the center of sedimentation basin, and appropriate disturb is carried out to the sludge of settling zone
It is dynamic, the cavity that sludge evacuates top is filled up, accelerates suction of the sludge pump to sludge.Mud scraper can significantly improve the flowing of sludge
Property, residence time of the sludge in sedimentation basin is reduced to greatest extent.
A kind of continuous flow double sludge denitrification advanced nitrogen dephosphorization process, using the above-mentioned ANSAOAO based on On-line Control
Continuous flow double sludge denitrification advanced nitrogen dephosphorization apparatus, which is characterized in that include the following steps:
The water inlet end in sewage pond after the adjustment enters regulating reservoir, then is conveyed into anaerobic pond by intake pump and is pumped with being returned by sludge
The sludge of return is mixed, and discharges phosphorus under anaerobic, and the oxidation-reduction electrode of anaerobic pond end setting is detested to monitor
The release of oxygen pond phosphorus;
After anaerobic reaction, mud mixed liquid flows into first stage precipitation tank, the supernatant that first stage precipitation tank precipitation is separated
Liquid stream enters biological aerated filter, carries out nitration reaction by aerobic aeration area and deoxidation area successively in biological aerated filter, obtains
To nitrification liquid aerobic-anoxic entered by pipeline from the discharge outlet of biological aerated filter bottom select pond;Industrial PC passes through control
The aeration intensity of aeration head is dense to control the dissolved oxygen of the nitrification liquid flowed out from biological aerated filter in biological aerated filter processed
Degree realizes whole nitrifications of ammonia nitrogen between 0.5-1.0mg/L;
The sludge of first stage precipitation tank sedimentation surmounts pump through the first sludge and is delivered in aerobic-anoxic selection pond, with aeration and biological
The nitrification liquid that filter tank flows into is mixed, and obtains mud mixed liquid;Industrial PC is according to the oxidation-reduction potential of level-one anoxic pond
Control need, by control aerobic-anoxic select pond aeration pump supply frequency come control aerobic-anoxic select pond aeration pump
Startup and stopping and operation when aeration intensity size, setting the oxidation reduction potential control of level-one anoxic pond
In the range of;
Mud mixed liquid flows into level-one anoxic pond after aerobic-anoxic selection pond outflow, and anti-nitre occurs in level-one anoxic pond
Change inhale phosphorus reaction and denitrification denitrogenation reaction, industrial PC by control aerobic-anoxic select pond in aeration head aeration intensity,
First sludge surmounts the sludge flow velocity of pump and adjusts the oxidation-reduction potential of two-stage aeration tank to control the oxygen of level-one anoxic pond
Change reduction potential, denitrification denitrogenation is enable to inhale phosphorus reaction and is carried out by the control condition of setting;
The mud mixed liquid flowed out from level-one anoxic pond is flowed into level-one aeration tank, and the ammonia nitrogen in mud mixed liquid is carried out
Complete oxidative nitration reaction, while the degradation reaction of aerobic phosphorus absorption reaction and organic matter occurs;The aeration system of level-one aeration tank
System increases and decreases the supply frequency of aeration pump, is equivalent to increase or reduces exposure by periodically increasing and decreasing aeration intensity
Gas intensity, while pH changing rules are detected to determine the terminal of nitration reaction and keep corresponding aeration strong by pH measurement systems
Degree;When increase aeration intensity:If pH rises, aeration intensity has been over the terminal of nitration reaction, it should reduce aeration
Intensity;If pH declines, nitration reaction is incomplete, need to increase aeration intensity;If pH rises after falling before, at this moment aeration is strong
Degree is just at nitrifying near terminal, using the aeration intensity after adjustment.When reducing aeration intensity:If pH declines, expose
Gas intensity has been over the terminal of nitration reaction, need to be further reduced aeration intensity;If pH rises, nitration reaction is endless
Entirely, aeration intensity need to be increased;If the rule that pH presentations rise after falling before, at this moment aeration intensity is attached just at nitrification terminal
Closely, that aeration intensity is adjusted back original aeration intensity is constant.
After reaction, mud mixed liquid flows into two level anoxic pond to aerobic nitrification from level-one aeration tank, surpasses with the second sludge
It more pumps the sludge that surmounts come from first stage precipitation tank conveying to be mixed, and carries out second of denitrifying phosphorus uptake and react anti-with denitrogenation
It should;Industrial PC controls the oxidation-reduction potential of two level anoxic pond by the way that the second sludge is controlled to surmount the flow velocity of pump;First is dirty
Mud surmount pump and the second sludge to surmount the control principle of pump be to surmount the oxidation-reduction potential that sludge preferentially meets level-one anoxic pond
Under conditions of control requirement, just consider that surmounting flow rate pump by adjusting the second sludge reaches the oxidation-reduction potential of two level anoxic pond
It is required to control.
By electromagnetic flowmeter reading, the first sludge surmounts pump to industrial PC, the second sludge surmounts the flow velocity of pump, is not changing
Become under conditions of the overall flow rate for surmounting sludge, the working frequency of frequency converter that adjustment sludge surmounts pump surmounts sludge to change two
The flow velocity of pump, so as to change the sludge supply to level-one aeration tank and two level anoxic pond.
Later, mud mixed liquid flows into two-stage aeration tank, is acted on before water outlet by aeration reinforcing aerobic phosphorus absorption, secondly
The nitration reaction of oxidative decomposition and remaining ammonia nitrogen to residual organic substances.Industrial PC is by controlling the exposure of two-stage aeration tank
Air pump supply frequency controls aeration intensity to make the oxidation reduction potential control of two-stage aeration tank in the range of setting;Industry control
Computer according to the hydrogen reduction control of Electric potentials of level-one anoxic pond can also require that two-stage aeration tank oxidation-reduction potential can be adjusted
To meet the control requirement of level-one anoxic pond oxidation-reduction potential.
Last mud mixed liquid flows into second-level settling pond and carries out separation of solid and liquid, the supernatant after sedimentation be discharged in clear water reserviors into
One step settles;The clear purified water of clear water reserviors is discharged to by drainpipe outside device;In the partial sludge of second-level settling pond sedimentation
Pump is returned to by sludge and starts new cycle back to anaerobic pond, another part sludge is discharged as excess sludge with sludge pump
To outside the present apparatus;
Industrial PC adjusts the oxygen of level-one anoxic pond and two level anoxic pond by measuring the concentration of clear water reserviors orthophosphoric acid root
Change reduction potential;Pass through the control skill that this oxidation reduction potential control system is combined with water outlet orthophosphoric acid root control system
Art reaches the control requirement to being discharged orthophosphoric acid root;
Wherein, mud mixed liquid is in each pond residence time:Anaerobic pond 1-2.5h, aerobic-anoxic selection pond 0.2-1h, level-one
Anoxic pond 1-3h, level-one aeration tank 0.5-1.5h, two level anoxic pond 0.5-2h, two-stage aeration tank 0.25-0.5h;
First stage precipitation tank supernatant is 2-8h in the biological aerated filter residence time;
The gas-water ratio of biological aerated filter is:10-40;
The sludge concentration control of anaerobic pond, level-one anoxic pond and two level anoxic pond is in the range of 2000mg/L~5000mg/L
It is interior;
Using flow rate pump of intaking as reference, each flow rate pump proportional region of the present apparatus:Intake pump 100%, the first sludge surmount pump
Flow velocity 40%~70%, the second sludge surmount flow rate pump 0%~15%, and sludge returns to flow rate pump 100%~150%;
Anaerobic pond oxidation reduction potential control range<- 300mv, level-one anoxic pond oxidation reduction potential control range -170
~-100mv, -170~-100mv of two level anoxic pond oxidation reduction potential control range.Two-stage aeration tank oxidation-reduction potential control
Range processed:+ 0~+120mv.
It is discharged 0.1~0.3mg/L of orthophosphoric acid root control range.
It is further preferred that the sludge retention time in the present apparatus is 10-17 days.
The a large amount of sludge of biological aerated filter longtime running and biomembrane are accumulated in biological aerated filter, can send out biofilter
The release that phosphorus can occur for the raw accumulation blocked with a large amount of microorganisms influences phosphor-removing effect.Therefore, when device continuous operation 15 days extremely
Biological aerated filter should be backwashed at 20 days, when backwash will be set between biological aerated filter and level-one aeration tank
The normally opened gas solenoid valve of nitrification liquid in pipeline is closed, and backwashing solenoid valve and normally closed gas solenoid valve are opened, opened simultaneously
Clear water in clear water reserviors is injected biological aerated filter, while aeration and biological is filtered by backwashing pump below biological aerated filter
The aeration pump working frequency in pond is transferred to maximum, and entire packing area is aerated with aeration head using backwash, passes through cutting for bubble
It cuts disturbance and promotes biofilm detachment on filler.Flushing water is discharged from the drain valve on the top of biological aerated filter.Backwash terminates
Afterwards, normally closed gas solenoid valve, backwashing solenoid valve and backwashing pump are closed, is opening normally opened gas solenoid valve, is carried out normal
Water process works.
Based on whole device of the present invention is automatically controlled with industrial PC, in the case that sewage quality is relatively stable, management
Personnel are according to the situation of the water quality of sewage, carbon-nitrogen ratio and carbon-phosphorus ratio, the sedimentation situation of first stage precipitation tank sludge and to be achieved
Clean-up effect determines that water inlet velocity ratio, sludge surmount the velocity ratio for pumping total velocity ratio, sludge return pump, further passes through people
Work regulation and control operation, detects the situation of change of each reaction tank orthophosphoric acid root, ammonia nitrogen, nitrate anion and nitrite anions, determines aeration and biological
The dissolved oxygen control range in filter tank, determines the control of level-one anoxic pond and two level anoxic pond and the oxidation-reduction potential of two-stage aeration tank
Range processed primarily determines and adjusts level-one anoxic pond and two level anoxic pond and the oxidation-reduction potential of two-stage aeration tank, first step
Whole two sludge surmounts the flow velocity of pump, primarily determines that two-stage aeration tank makes the ammonia nitrogen in mud mixed liquid occur needed for thoroughly nitrification
Aeration intensity, i.e. aeration pump supply frequency;
Industrial PC is strong according to the aeration in actual conditions automatic adjustment aerobic-anoxic selection pond, the aeration pump of two-stage aeration tank
Two sludge of degree (i.e. supply frequency) and adjustment surmount the flow velocity of pump, make the redox of level-one anoxic pond and two level anoxic pond electric
Control range of the position in setting, and make water outlet just by adjusting the oxidation-reduction potential of level-one anoxic pond and two level anoxic pond
Phosphate radical reaches control requirement, by adjusting the oxidation-reduction potential of two-stage aeration tank and the exposure in control aerobic-anoxic selection pond
Gas intensity (i.e. the supply frequency of aeration pump), the aerobic and anaerobic condition in control aerobic-anoxic selection pond, makes level-one anoxic pond
The state of a control that oxidation-reduction potential is in setting comes intensified anti-nitrated suction phosphorus, aerobic phosphorus absorption and denitrification denitrogenation, enables device
The automatic rapid variation for adapting to sewage quality and concentration.When sewage quality changes greatly, then administrative staff are needed according to specific
Operating condition in time significantly adjusts the range of control condition.Industrial PC control level-one anoxic pond, two level anoxic
The control method such as table 1 of pond and two-stage aeration tank oxidation-reduction potential and water outlet orthophosphoric acid root.
1 level-one anoxic pond of table, two level anoxic pond, two-stage aeration tank oxidation-reduction potential and the controlling party for being discharged orthophosphoric acid root
Method table
The oxidation-reduction potential of level-one anoxic pond, the anoxic pond of two level and two-stage aeration tank can carry out downward as needed
Whole, control range is the maximum control range of oxidation-reduction potential, is adjusted in the control range.Manager needs right in advance
The oxidation reduction potential control range of level-one anoxic pond, two level anoxic pond and two-stage aeration tank is set, to meet sewage water
Matter and the control requirement of concentration variation.
The oxidation reduction potential control system of the present apparatus optimizes two-stage aeration tank oxidation reduction potential control range,
It is divided into upper limit control range, intermediate control range and lower limit control range.
Lower limit controls:When the oxidation-reduction potential of two-stage aeration tank is in the oxidation reduction potential control model of two-stage aeration tank
During the lower limit enclosed, sewage carbon-nitrogen ratio is relatively low, and the supply frequency of the aeration pump in aerobic-anoxic selection pond is less than or equal to needed for startup
Supply frequency, aerobic-anoxic selection pond are in anaerobic condition, and whole device is in the state that organic carbon source extremely lacks, and device is only
The consumption of reduced organic carbon source can be aerated by reducing mud mixed liquid, to increase the supply of level-one anoxic pond organic carbon source,
At this moment the control of the oxidation-reduction potential of the inaccessiable level-one anoxic pond of device or two level anoxic pond requires, at this moment assembly first
Meet the control requirement of level-one anoxic pond, secondly just consider the control requirement of two level anoxic pond.
Intermediate control range:When the oxidation-reduction potential of two-stage aeration tank is in two-stage aeration tank oxidation reduction potential control
When between the upper and lower bound of range, sewage carbon-nitrogen ratio is slightly lower, and the supply frequency of the aeration pump in aerobic-anoxic selection pond, which is less than, to be opened
Dynamic required supply frequency, aerobic-anoxic selection pond are in anaerobic condition, and whole device is in two-stage aeration tank redox electricity
In the dynamic adjustment of position, by the adjustment to two-stage aeration tank oxidation-reduction potential, the organic carbon source in sewage can only be firm at this time
Meet the oxidation reduction potential control requirement of level-one anoxic pond and two level anoxic pond well.Since two-stage aeration tank redox is in
Continuous to adapt in variation, the control of device is in dynamic stability.At this moment device can reach the Nitrogen/Phosphorus Removal of sewage substantially
It arrives or slightly below design requirement.
The upper limit controls:When the oxidation-reduction potential of two level anoxic pond is in the upper limit, sewage carbon-nitrogen ratio is higher, aerobic-anoxic
The supply frequency of the aeration pump in pond is selected to be more than the supply frequency needed for starting, aerobic-anoxic selection pond is in aerobic aeration shape
State.It only need to be by the way that aerobic-anoxic be controlled to select the aeration intensity of pond and two-stage aeration tank and slightly adjusts No. two sludge pumps
Flow velocity, so that it may so that device is in balanced steady state.At this moment device is best to the Nitrogen/Phosphorus Removal of sewage.
When two level anoxic pond oxidation-reduction potential is less than control range, the flow velocity that the second sludge pump surmounts pump is lowered.
When the oxidation-reduction potential of two-stage aeration tank is not in control range, by adjusting the aeration pump electricity of two-stage aeration tank
Source frequency controls.
When level-one anoxic pond, two level anoxic pond, the oxidation-reduction potential of two-stage aeration tank are in control range, industrial PC
It will be according to the concentration adjustment level-one anoxic pond of water outlet orthophosphoric acid root and the oxidation-reduction potential of two level anoxic pond;
The present apparatus adjusts one by periodic detection clear water reserviors orthophosphoric acid root concentration according to the concentration of clear water reserviors orthophosphoric acid root
Grade anoxic pond and two level anoxic pond oxidation-reduction potential.Pass through up-regulation one when the concentration of water outlet orthophosphoric acid root is higher than control range
The oxidation-reduction potential of grade anoxic pond and two level anoxic pond, reduces the effect of denitrification denitrogenation, is remained in mud mixed liquid few
The nitrate ion of amount carrys out the denitrifying phosphorus uptake effect of reinforcement sludge, improves the clean-up effect of phosphorus.When water outlet orthophosphoric acid root it is dense
When degree is less than control range, by lowering the oxidation-reduction potential of level-one anoxic pond and two level anoxic pond, mud mixed liquid is reduced
In remaining nitrate ion, carry out the denitrification denitrogenation effect of reinforcement sludge, improve the clean-up effect of nitrogen.
Under normal operating conditions, the terminal oxidized reduction potential of anaerobic pond should be less than -300mv to the present apparatus, to ensure phosphorus
Release, when the oxidation-reduction potential of anaerobic pond will alarm higher than -300mv systems.System is significantly adjusted by artificial regulatory
Whole each control parameter.
Present apparatus treated sewage carbon-nitrogen ratio is 6~14, and carbon-phosphorus ratio is more than 50 sanitary sewage, can reach comparatively ideal purification
Effect.
When the carbon-nitrogen ratio of treated sewage is 4~6, deep purifying effect is realized, it can be in firsts and seconds anoxic pond
Additional organic carbon source realizes advanced nitrogen dephosphorization, control method and the upper limit control condition one of the higher sewage of carbon-nitrogen ratio
It causes, is just not described in detail.
Gas flowmeter is only intended to the situation of administrator's manual record aeration, can directly controlling not as the present apparatus
Parameter.
Compared with prior art, the present invention advantage is:
Present apparatus startup stage makes Denitrifying Phosphate Accumulating Organisms become anaerobic pond-aerobic-anoxic selection pond, one by technique adjustment
The dominant bacteria of activated sludge, becomes nitrobacteria in grade anoxic pond-level-one aeration tank-two level anoxic pond-two-stage aeration tank
The dominant bacteria of the biomembrane adhered on filler in biological aerated filter.
The present invention surmounts in the segmentation by anaerobic sludge realizes denitrification step by step for level-one anoxic pond and two level anoxic pond
Denitrogenation and denitrifying phosphorus uptake process provides safeguard step by step, the particularly anti-nitration reaction of two level anoxic pond only need a small amount of anaerobism dirty
Mud reduces ammonia nitrogen and enters two level anoxic pond, reduces water outlet total nitrogen concentration;Level-one aeration tank pH control nitrification terminals, keep away
Exempt from organic carbon source by excessive oxidation consumption to be fallen, improve the denitrifying ability of two level anoxic pond below, level-one, two-stage aeration tank are real
Aerobic phosphorus absorption step by step and aerobic nitrification are showed, excessive anaerobic environment are avoided to cause the secondary release of phosphorus;
Using On-line Control technology, the sewage in optimum controling range undergoes denitrification denitrogenation twice to apparatus of the present invention, twice
Dilution to ammonia nitrogen carries out the processes such as oxidative nitration reaction to ammonia nitrogen three times, advanced nitrogen is finally done step-by-step;It is released by anaerobism
Phosphorus, denitrification dephosphorization twice, aerobic phosphorus absorption, is finally done step-by-step deep phosphorous removal twice;Solves the anti-nitre such as A2N and Dephanox
The problem of advanced nitrogen dephosphorization can not be realized by changing denitrification dephosphorization technique, and effluent quality is unstable;
Apparatus of the present invention are based on double sludge denitrification denitrogenation dephosphorizing principle, establish anaerobism Anaerobic selections S
The denitrifying activated sludge system of the aerobic aerobic Oxic of Oxic anoxics Anoxic of elective anoxics Anoxic and with aerobic nitre
Change double sludge systems that the biofilm system (i.e. biological aerated filter) of function Nitrifying is combined.
The present invention is set in biological aerated filter lower part without aeration deoxidation area, and sets dissolving at aeration nitrification tank water outlet
Oxygen electrode monitors the dissolved oxygen content of nitrification liquid water outlet on-line to control aeration intensity, while ensureing that ammonia nitrogen nitrifies completely
That reduces dissolved oxygen enters firsts and seconds anoxic pond;Reach the nitrification of the low ammonia nitrogen of biological aerated filter and low DO concentration
Liquid is discharged;
First stage precipitation tank and second-level settling pond setting mud scraper, reduce sludge in the residence time of sedimentation basin, avoid sludge
Accumulation generates local anaerobic, the secondary release of caused phosphorus;
Apparatus of the present invention can be according to different sewage qualities and carbon-nitrogen ratio situation, by measuring the soluble positive phosphorus of each reaction tank
Hydrochlorate, ammonia nitrogen, nitrate anion concentration situation of change, determine the best most stable of control model of each reaction tank oxidation-reduction potential
It encloses;When processing CODcr be 150mg/L to 1000mg/L, carbon-nitrogen ratio 6-14, carbon-phosphorus ratio>During 50 sanitary sewage, the present apparatus goes out
Water total nitrogen, total phosphorus and CODcr many indexs can reach four class more than standard of surface water substantially.
It when concentration of wastewater is relatively low, can correspondingly increase intake pump velocity ratio, correspondingly reduce mud mixed liquid reflux
Flow rate pump is than improving the operational efficiency of the present apparatus.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other attached drawings according to these attached drawings.
Fig. 1 is the ANSAOAO continuous flow double sludge denitrification advanced nitrogen dephosphorization apparatus the present invention is based on On-line Control
Structure diagram;
Wherein, 1, regulating reservoir;2nd, submersible agitator;3rd, intake pump;4th, anaerobic pond;5th, exhaust pipe;6th, oxidation-reduction electrode;
7th, on-line oxidation reduction potential meter;8th, first stage precipitation tank;9th, central shaft;10th, decelerating motor;11st, cleaning shoe;12nd, frequency converter;
13rd, aeration pump;14th, gas flowmeter;15th, biological aerated filter;16th, filler;17th, aeration head;18th, backwash aeration head;
19th, water distributor;20th, mud valve;21st, normally opened gas solenoid valve;22nd, normally closed gas solenoid valve;23rd, online dissolved oxygen instrument;24th, it arranges
Water valve;25th, nitrification liquid normally open solenoid valve;26th, dissolved oxygen electrode;27th, electromagnetic flowmeter;28th, the first sludge surmounts pump;29th, it sieves
Orifice plate;30th, aerobic-anoxic selection pond;31st, level-one anoxic pond;32nd, level-one aeration tank;33rd, pH electrodes;34th, online pH analyzers;
35th, two level anoxic pond;36th, two-stage aeration tank;37th, the second sludge surmounts pump;38th, second-level settling pond;39th, clear water reserviors;40th, it recoils
Wash solenoid valve;41st, drainpipe;42nd, backwashing pump;43rd, sludge returns to pump;44th, sludge pump;45th, industrial PC;46th, water inlet pipe;
47th, sampling pipe;48th, online phosphate radical monitor;
Wherein arrow direction is water (flow) direction.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the present invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are it is understood that the correlation module and its function of realization that are arrived involved in the present invention
It is that computer software programs conventional in the prior art are carried on improved hardware and its device of composition, device or system
Or related agreement achieves that, is not that computer software programs of the prior art or related agreement are improved.For example,
Improved computer hardware system still can realize the spy of the hardware system by loading existing operation system of software
Determine function.It is understood, therefore, that the innovation of the present invention is the improvement to hardware module in the prior art and its company
Connect syntagmatic rather than only to the improvement to realize the software carried in relation to function or agreement in hardware module.
Those skilled in the art of the present technique are it is understood that correlation module mentioned in the present invention is performed for the application
Described in one or more hardware devices in step in operation, method, flow, measure, scheme.The hardware device can
Think required purpose and specially design and manufacture or can also use all-purpose computer in known device or it is known its
His hardware device.The all-purpose computer is activated or is reconstructed with having the procedure selection being stored in it.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that is used in the specification of the present invention arranges
Diction " comprising " refers to there are the feature, integer, step, operation, element and/or component, but it is not excluded that presence or addition
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
Part is " connected " or during " coupled " to another element, it can be directly connected or coupled to other elements or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " can include wireless connection or coupling.Wording used herein
"and/or" includes any cell of one or more associated list items and all combines.
Those skilled in the art of the present technique are appreciated that unless otherwise defined all terms used herein are (including technology art
Language and scientific terminology) there is the meaning identical with the general understanding of the those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, will not be with idealizing or the meaning of too formal be explained.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, if connection relation used herein is without spy
Different explanation can realize the function of the present invention, and identical with the general understanding of the those of ordinary skill in fields of the present invention
.
With reference to embodiment, the present invention is described in further detail.
It will be understood to those of skill in the art that the following example is merely to illustrate the present invention, and it should not be regarded as limiting this hair
Bright range.In the examples where no specific technique or condition is specified, according to the described technology of document in the art or condition
Or it is carried out according to product description.Production firm person is not specified in material therefor or instrument, and being can be by buying what is obtained
Conventional products.
A kind of ANSAOAO continuous flow double sludge denitrification advanced nitrogen dephosphorization apparatus based on On-line Control, including adjusting
Pond 1, anaerobic pond 4, first stage precipitation tank 8, biological aerated filter 15, aerobic-anoxic selection pond 30, level-one anoxic pond 31, level-one aeration
Pond 32, two level anoxic pond 35, two-stage aeration tank 36, second-level settling pond 38, clear water reserviors 39, oxidation reduction potential determination control system
System, DO determination control system, nitrification terminal point control system, aerating system, water outlet orthophosphoric acid root measure control system and work
Control computer 45;
The water inlet end of regulating reservoir 1 is connected with water inlet pipe 46, the water outlet of regulating reservoir 1 by carry the pipeline of intake pump 3 with
The water inlet end of anaerobic pond 4 is connected;The water outlet of anaerobic pond 4 is connected with the water inlet end of first stage precipitation tank 8 by pipeline;
8 supernatant water outlet of first stage precipitation tank is connected by pipeline with the water distributor of 15 top of biological aerated filter;
The discharge outlet of 15 bottom of biological aerated filter is by carrying the pipeline and aerobic-anoxic of nitrification liquid normally open solenoid valve 25
Select the water inlet end connection in pond 30;
Aerobic-anoxic selection pond 30, level-one anoxic pond 31, level-one aeration tank 32, two level anoxic pond 35, two-stage aeration tank 36
Sequentially it is connected successively by pipeline with second-level settling pond 38;That is the water outlet in aerobic-anoxic selection pond 30 and level-one anoxic pond 31
Water inlet end is connected;The water outlet of level-one anoxic pond 31 is connected with the water inlet end of level-one aeration tank 32, and so on;
The supernatant water outlet of the second-level settling pond 38 is connected by pipeline with the water inlet end of clear water reserviors 39;
The water outlet of clear water reserviors 39 is connected with drainpipe 41;It is the lower section discharge outlet of clear water reserviors 39, backwashing solenoid valve 40, anti-
Flushing pump 42 is sequentially connected successively with 15 bottom discharge mouth of biological aerated filter by pipeline;15 bottom of biological aerated filter also connects
It is connected to the pipeline with mud valve 20;
The water inlet end phase that the bottom mud discharging mouth of second-level settling pond 38 returns to the pipeline and anaerobic pond 4 of pump 43 by carrying sludge
Even;The bottom mud discharging mouth of second-level settling pond 38 is also connected with the pipeline with sludge pump 44;
By carrying, the first sludge surmounts the pipeline of pump 28 to the bottom mud discharging mouth of first stage precipitation tank 8 and aerobic-anoxic selects pond
30 water inlet end is connected;The bottom mud discharging mouth of first stage precipitation tank 8 also surmounts the pipeline and two level of pump 37 by carrying the second sludge
The water inlet end of anoxic pond 35 is connected;
The pipeline that first sludge surmounts pump 28 with the water inlet end in aerobic-anoxic selection pond 30 is connected is equipped with sludge electromagnetic current
Gauge 27, the second sludge surmounts also is provided with sludge electromagnetic flowmeter on the pipeline that pump 37 is connected with the water inlet end of two level anoxic pond 35
27, and communication ends of the communication ends of two sludge electromagnetic flowmeters 27 with industrial PC 45 are connected;Industrial PC 45 is also distinguished
Pump 28 is surmounted with the first sludge by frequency converter 12, the second sludge surmounts pump 37 and is connected;
The regulating reservoir 1, anaerobic pond 4, aerobic-anoxic selection pond 30, level-one anoxic pond 31, level-one aeration tank 32, two level
Submersible agitator 2 is equipped in anoxic pond 35 and two-stage aeration tank 36;Preferably submersible agitator 2 be located in pond under
Portion;
The regulating reservoir 1, anaerobic pond 4, aerobic-anoxic selection pond 30, level-one anoxic pond 31 and two level anoxic pond 35 are close
Envelope (sealing is not passed through air, but water is allowed to flow through), and the top of anaerobic pond 4, the top in aerobic-anoxic selection pond 30, level-one
The top of anoxic pond 31 and the top of two level anoxic pond 35 are equipped with exhaust pipe 5;Exhaust pipe 5 is produced by for discharging in respective cells
Gas.
The oxidation reduction potential determination control system has four sets, often covers oxidation reduction potential determination control system and includes
The oxidation-reduction electrode 6 and on-line oxidation reduction potential meter 7 being connected;The oxidation of 4 sets of oxidation reduction potential determination control systems
Reducing electrode 6 be respectively arranged on the water outlet of anaerobic pond 4, the water outlet of level-one anoxic pond 31, two level anoxic pond 35 water outlet and
The water outlet of two-stage aeration tank 36;7 one end of on-line oxidation reduction potential meter in 4 sets of oxidation reduction potential determination control systems with
Its corresponding oxidation-reduction electrode 6 is connected, and the other end is connected with 45 communication ends of industrial PC;
The DO determination control system includes the dissolved oxygen electrode 26 being connected and online dissolved oxygen instrument 23, described
Dissolved oxygen electrode 26 be set between the water outlet of biological aerated filter 15 and the water inlet end in aerobic-anoxic selection pond 30 in pipeline,
Dissolved oxygen electrode 26 is connected with the output terminal of online dissolved oxygen instrument 23, input terminal and the industry control electricity of the online dissolved oxygen instrument 23
45 communication ends of brain are connected;
The nitrification terminal point control system, including the pH electrodes 33 being connected and online pH analyzers 34, pH electrodes 33
It is located at the water outlet of level-one aeration tank 32;PH electrodes 33 are connected with the measuring signal end of online pH analyzers 34, and described is online
The communication ends of pH analyzers 34 are connected with 45 communication ends of industrial PC;
The aerating system has 4 sets, often cover aerating system include be sequentially connected aeration head 17, gas flowmeter 14,
Aeration pump 13 and frequency converter 12, aeration pump 13 are connected with the output terminal of frequency converter 12;Aeration head 17 in 4 sets of aerating systems divides
Not She Yu in 15 filler 16 of biological aerated filter, bottom in aerobic-anoxic selection pond 30, bottom and two level in level-one aeration tank 32
Bottom in aeration tank 36;The communication ends of frequency converter 12 in 4 sets of aerating systems are connected with 45 communication ends of industrial PC;
It is discharged phosphate radical measure control system and includes sampling pipe 47 and online phosphate radical monitor 48, one end of sampling pipe 47
It is arranged in clear water reserviors 39, the other end of sampling pipe 47 is connected with the water inlet end of online phosphate radical monitor 48, online phosphate radical
The communication ends of monitor 48 are connected with the communication ends of industrial PC 45.
As present invention further optimization scheme, between the industrial PC 45 and on-line oxidation reduction potential meter 7,
Between industrial PC 45 and frequency converter 12, between industrial PC 45 and online dissolved oxygen instrument 23, industrial PC 45 and online pH surveys
Determine being electrically connected between instrument 34 and between industrial PC 45 and electromagnetic flowmeter 27 to be connected by communication using 485.
As present invention further optimization scheme, 15 top of biological aerated filter is cylinder type, and lower part is with diameter
Cone angle is 60 ° of inverted conical, and the joint of circular cone and cylinder is horizontally disposed with stainless steel sieve tray 29, mesh size 5mm, sieve pore
Filler 16 is loaded on plate 29 and forms packing layer, 16 grain size of filler is 0.6-1.5cm;Water distributor 19 is equipped with right over packing layer;Its
In, the filler 16 is volcanic rock, haydite, quartz sand or zeolite.
As present invention further optimization scheme, the aeration head 17 in 15 filler 16 of biological aerated filter (should
Aeration head is for being normally aerated) it is arranged on sieve tray 29 tops, and be the 1/3 of filler layer thickness with the distance of sieve tray 29.
The filler above aeration head being normally aerated is in aerobic aeration state, and nitration reaction mainly occurs, and is aerobic nitrification zone, and
Packing layer below normal aeration head is not aerated, can only by nitrification water in remaining ammonia nitrogen and nitrite anions, disappear
Dissolved oxygen in water consumption is deoxidation area.
As present invention further optimization scheme, the top of the biological aerated filter 15 is equipped with drain valve 24, and
Drain valve 24 is located at the top of packing layer;
With the aeration pump 13 that aeration head 17 is connected in 15 filler 16 of biological aerated filter also by carrying normally closed gas electromagnetism
The pipeline of valve 22 is connected with backwash aeration head 18;The bottom of the backwash setting filler 16 of aeration head 18, and
The top of sieve tray 29;In 15 filler 16 of biological aerated filter between aeration head 17 and coupled aeration pump 13
Normally opened gas solenoid valve 21 is additionally provided on pipeline.
Mud scraper is equipped in first stage precipitation tank 8 and second-level settling pond 38.Mud scraper drives low speed rotation by decelerating motor 10
Dynamic, rotating speed is advisable with not stirring sludge.Mud scraper includes decelerating motor 10, central shaft 9, cleaning shoe 11 and the branch for supporting cleaning shoe
Support, cleaning shoe 11 are that the scraper plate rotated around sedimentation basin center is made along the taper area edge of sedimentation basin.The main function of mud scraper
It is the center that the sludge at sedimentation basin bottom pyramidal edge is scraped to sedimentation basin, appropriate disturbance is carried out to the sludge of settling zone,
The cavity that sludge evacuates top is filled up, accelerates suction of the sludge pump to sludge.Mud scraper can significantly improve the mobility of sludge, most
Limits reduce residence time of the sludge in sedimentation basin.
A kind of continuous flow double sludge denitrification advanced nitrogen dephosphorization process, using the above-mentioned ANS AOAO based on On-line Control
Continuous flow double sludge denitrification advanced nitrogen dephosphorization apparatus, includes the following steps:
The water inlet end in sewage pond 1 after the adjustment enters regulating reservoir 1, then be conveyed into anaerobic pond 4 and with being returned by sludge by intake pump 3
It returns the sludge that pump 43 returns to be mixed, discharges phosphorus under anaerobic, the oxidation-reduction electrode 6 of 4 end of anaerobic pond setting is used
To monitor the release of 4 phosphorus of anaerobic pond;
After anaerobic reaction, mud mixed liquid flows into first stage precipitation tank 8, and the precipitation of first stage precipitation tank 8 is separated upper
Clear liquid flows into biological aerated filter 15, carries out nitration reaction, obtains nitrification liquid, and the discharge outlet of 15 bottom of biological aerated filter enters
Aerobic-anoxic selects pond 30;Industrial PC 45 by control the aeration intensity of aeration head 17 in biological aerated filter 15 control from
The dissolved oxygen concentration of the nitrification liquid flowed out in biological aerated filter 15 realizes whole nitre of ammonia nitrogen between 0.5-1.0mg/L
Change;
The sludge that first stage precipitation tank 8 settles surmounts pump 28 through the first sludge and is delivered in aerobic-anoxic selection pond 30, with exposure
The nitrification liquid that gas biofilter 15 flows into is mixed, and obtains mud mixed liquid;
Aerobic-anoxic selection pond 30 aeration pump 13 operation and stopping and operation when aeration intensity size according to
The oxidation reduction potential control of level-one anoxic pond 31 needs to determine;
After mud mixed liquid is flowed out from aerobic-anoxic selection pond 30, level-one anoxic pond 31 is flowed into, is sent out in level-one anoxic pond 31
Raw denitrifying phosphorus uptake reaction and denitrification denitrogenation reaction, industrial PC 45 is by controlling aerobic-anoxic to select aeration head 17 in pond 30
Aeration intensity, the first sludge surmounts the mud discharge of pump 28 and adjusts the oxidation-reduction potential of two-stage aeration tank 36 and control
The oxidation-reduction potential of level-one anoxic pond 31 enables denitrification denitrogenation to inhale phosphorus reaction and is normally carried out;
The mud mixed liquid flowed out from level-one anoxic pond 31 is flowed into level-one aeration tank 32, by the ammonia nitrogen in mud mixed liquid
Complete oxidative nitration reaction is carried out, while the degradation reaction of aerobic phosphorus absorption reaction and organic matter occurs;Industrial PC 45 passes through
Control enhancing and reduction aeration intensity detect the situation of change of pH to judge whether aeration intensity just equals or exceeds nitrification eventually
Aeration intensity needed for point;
After reaction, mud mixed liquid flows into two level anoxic pond 35 to aerobic nitrification from level-one aeration tank 32, with the second dirt
Mud surmounts the sludge that surmount that pump 37 comes from the conveying of first stage precipitation tank 8 and is mixed, and carry out the reaction of second denitrifying phosphorus uptake and
Denitrification reaction;Industrial PC 45 controls the oxidation of two level anoxic pond 35 also by the way that the second sludge is controlled to surmount the velocity ratio of pump 37
Former current potential;
Later, mud mixed liquid flows into oxidative decomposition, the aerobic phosphorus absorption that two-stage aeration tank 36 carries out residual organic substances
Reaction and the nitration reaction of remaining ammonia nitrogen, industrial PC 45 control two level to expose by controlling the aeration intensity of two-stage aeration tank 36
The oxidation-reduction potential in gas pond 36;
Last mud mixed liquid flows into second-level settling pond 38 and carries out separation of solid and liquid, and the supernatant after sedimentation is discharged to clear water reserviors 39
In further settle;39 clear purified water of clear water reserviors is discharged to by drainpipe 41 outside device;It is settled in second-level settling pond 38
Partial sludge pump 43 returned to by sludge start new cycle back to anaerobic pond 4, another part sludge is as remaining dirt
Mud sludge pump 44 is discharged to outside the present apparatus;Industrial PC 45 adjusts level-one by measuring the concentration of 39 orthophosphoric acid root of clear water reserviors
The oxidation-reduction potential of anoxic pond 31 and two level anoxic pond 35, so as to control the concentration of the orthophosphates of water outlet and total phosphorus;
Wherein, mud mixed liquid is in each pond residence time:Anaerobic pond 1-2.5h, aerobic-anoxic selection pond 0.2-1h, level-one
Anoxic pond 1-3h, level-one aeration tank 0.5-1.5h, two level anoxic pond 0.5-2h, two-stage aeration tank 0.25-0.5h;
First stage precipitation tank supernatant is 2-8h in the biological aerated filter residence time;
The gas-water ratio of biological aerated filter is:10-40;
The sludge concentration control of anaerobic pond, level-one anoxic pond and two level anoxic pond is in the range of 2000mg/L~5000mg/L
It is interior;
Using flow rate pump of intaking as reference, each flow rate pump proportional region of the present apparatus:Intake pump 100%, the first sludge surmount pump
Flow velocity 30%-80%, the second sludge surmount flow rate pump 0%-10%, and sludge returns to flow rate pump 100%-150%;
Each reaction tank oxidation reduction potential control range of oxidation reduction potential control system:Anaerobic pond<- 300mv, level-one lack
- 170~-100mv of oxygen pond, -170~-100mv of two level anoxic pond.Two-stage aeration tank:+ 0~+120m v.
Preferred embodiment is that the sludge retention time in the present apparatus is 10-17 days.
Application example 1
Apparatus of the present invention seed sludge is derived from Kunming sewage treatment plant, and domestication 15 days is carried out with domestic sewage from campus,
The domestication stage promotes nitrobacteria in the growth and breeding of biofilter by increasing the aeration intensity of biological aerated filter.
Commissioning test after domestication determines the optimum controling range of each control parameter by debugging.
Biological aerated filter dissolved oxygen control range 0.6-0.8mg/L, the at this moment ammonia nitrogen concentration of effluent of aeration biological filter
Respectively less than 0.2mg/L realizes the complete nitrification of ammonia nitrogen, ensures the clean-up effect of present apparatus total nitrogen.
Wherein, using flow rate pump of intaking as reference, each flow rate pump proportional region:Intake pump 100%, sludge surmount pump overall flow rate
Than 50%, (the first sludge surmounts flow rate pump 40%-50%, and the second sludge surmounts flow rate pump 0%-10%, and sludge surmounts the total stream of pump
The sludge of fast ratio=first surmounts the+the second sludge of flow rate pump and surmounts flow rate pump), sludge returns to flow rate pump 100%;
Mud mixed liquid is in the present apparatus each reaction tank residence time, anaerobic pond 1.5h, aerobic-anoxic selection pond 0.5h, level-one
Anoxic pond 2h, level-one aeration tank 1h, two level anoxic pond 1.5h, two-stage aeration tank 0.5h.First stage precipitation tank supernatant is given birth in aeration
The object filter tank residence time is 4h.
Each reaction tank oxidation reduction potential control range:Anaerobic pond<- 300mv, the control range -160 of level-one anoxic pond
~-110mv, two level anoxic pond -160~-110mv of control range, the 0~+120mv of control range of two-stage aeration tank.
First stage precipitation tank supernatant is 3~5h in the biological aerated filter residence time.
The gas-water ratio of biological aerated filter is:30~40;
Residence time control of the sludge in the present apparatus was at 14 days or so, anaerobic pond, level-one anoxic pond and two level anoxic pond
Sludge concentration control in the range of 2500mg/L~3500mg/L;
By continuous bimestrial normal operation, when domestic sewage from campus influent COD cr is 330-760mg/L, total nitrogen is
45-70mg/L, in the range of carbon-nitrogen ratio is 7-12, when total phosphorus is 6.2-9.0mg/L ranges, nitric efficiency is substantially all in 98-
Between 99.5%, dephosphorization efficiency is substantially between 97.0-99.0%, between the purification efficiency 93-95% of CODcr.The water outlet of TN
Between concentration only has 0.2-0.8mg/L, the aqueous concentration of total phosphorus only has 0.1-0.3mg/L.Obviously the TN being discharged reaches 2 class of surface water
More than water quality, TP basically reach 4 class more than water quality of surface water and CODcr reaches a kind of Yi Shang water quality of surface water, are successfully realized
To the target of a step deep purifying of domestic sewage from campus.
It is compared using the method for the present invention and other existing methods, the results are shown in Table 2.
Table 2
As can be seen from Table 2, the method for the present invention have good nitric efficiency and dephosphorization efficiency, and effect be superior to it is other existing
Forward position technique.
The above content is specific preferred embodiment is combined to the further description of the invention done, convenient for this skill
Art those skilled in the art is understood that and with the application of the invention, it cannot be assumed that the specific implementation of the present invention is only limited to and said with these
It is bright.For those skilled in the art, without departing from the inventive concept of the premise, it can also make
Several simple deductions and replacement, without having to go through creative labor.Therefore, those skilled in the art is according to the present invention takes off
Show, the improvement made to the present invention all should be within protection scope of the present invention.
Claims (8)
1. a kind of ANSAOAO continuous flow double sludge denitrification advanced nitrogen dephosphorization apparatus based on On-line Control, which is characterized in that
Including regulating reservoir, anaerobic pond, first stage precipitation tank, biological aerated filter, aerobic-anoxic selection pond, level-one anoxic pond, level-one aeration
Pond, two level anoxic pond, two-stage aeration tank, second-level settling pond, clear water reserviors, oxidation reduction potential determination control system, dissolved oxygen are surveyed
Determine control system, nitrification terminal point control system, aerating system, water outlet orthophosphoric acid root and measure control system and industrial PC;
The water inlet end of regulating reservoir is connected with water inlet pipe, the water outlet of regulating reservoir by carry intake pump pipeline and anaerobic pond into
Water end (W.E.) is connected;The water outlet of anaerobic pond is connected with the water inlet end of first stage precipitation tank by pipeline;
First stage precipitation tank supernatant water outlet is connected by pipeline with the water distributor above biological aerated filter;
The discharge outlet of biological aerated filter bottom selects pond by carrying the pipeline of nitrification liquid normally open solenoid valve with aerobic-anoxic
Water inlet end connects;
Aerobic-anoxic selection pond, level-one anoxic pond, level-one aeration tank, two level anoxic pond, two-stage aeration tank, second-level settling pond pass through
Pipeline is sequentially connected successively;
The supernatant water outlet of the second-level settling pond is connected by pipeline with the water inlet end of clear water reserviors;
The water outlet of clear water reserviors is connected with drainpipe;Lower section discharge outlet, backwashing solenoid valve, backwashing pump and the aeration of clear water reserviors
Biofilter bottom discharge mouth is sequentially connected successively by pipeline;Biological aerated filter bottom is also associated with the pipe with mud valve
Road;
The pipeline that the bottom mud discharging mouth of second-level settling pond returns to pump by carrying sludge is connected with the water inlet end of anaerobic pond;Two level is sunk
The bottom mud discharging mouth in shallow lake pond is also connected with the pipeline with sludge pump;
The bottom mud discharging mouth of first stage precipitation tank surmounts the pipeline of pump and the water inlet in aerobic-anoxic selection pond by carrying the first sludge
End is connected;The bottom mud discharging mouth of first stage precipitation tank also surmounts the pipeline of pump and the water inlet of two level anoxic pond by carrying the second sludge
End is connected;
The pipeline that the water inlet end that first sludge surmounts pump and aerobic-anoxic selection pond is connected is equipped with sludge electromagnetic flowmeter, and second
Sludge, which surmounts, also is provided with sludge electromagnetic flowmeter, and two sludge electromagnetism on the pipeline that pump is connected with the water inlet end of two level anoxic pond
The communication ends of flowmeter are connected with industrial PC communication ends;Industrial PC is also surmounted by frequency converter and the first sludge respectively
Pump, the second sludge surmount pump and are connected;
Regulating reservoir, anaerobic pond, aerobic-anoxic selection pond, level-one anoxic pond, level-one aeration tank, two level anoxic pond and the two level
Submersible agitator is equipped in aeration tank;
Regulating reservoir, anaerobic pond, aerobic-anoxic selection pond, level-one anoxic pond and the two level anoxic pond seals, and anaerobic pond
Top, the aerobic-anoxic selection top in pond, be equipped with exhaust pipe at the top of the top of level-one anoxic pond and two level anoxic pond;
The oxidation reduction potential determination control system has four sets, often covers oxidation reduction potential determination control system and includes being connected
The oxidation-reduction electrode and on-line oxidation reduction potential meter connect;The redox electricity of 4 sets of oxidation reduction potential determination control systems
Pole is respectively arranged on the water outlet of anaerobic pond, the water outlet of level-one anoxic pond, the water outlet of two level anoxic pond and two-stage aeration tank
Water outlet;The corresponding oxidation in on-line oxidation reduction potential meter one end in 4 sets of oxidation reduction potential determination control systems is also
Primary electrode is connected, and the other end is connected with industrial PC communication ends;
The DO determination control system includes the dissolved oxygen electrode being connected and online dissolved oxygen instrument, the dissolved oxygen
Electrode is set between the water outlet of biological aerated filter and the water inlet end in aerobic-anoxic selection pond in pipeline, dissolved oxygen electrode with
The output terminal of line dissolved oxygen instrument is connected, and the input terminal of the online dissolved oxygen instrument is connected with industrial PC communication ends;
The nitrification terminal point control system, including the pH electrodes being connected and online pH analyzers, pH electrodes are located at level-one exposure
The water outlet in gas pond;PH electrodes are connected with the measuring signal end of online pH analyzers, the communication ends of the online pH analyzers
It is connected with industrial PC communication ends;
The aerating system has 4 sets, often cover aerating system include be sequentially connected aeration head, gas flowmeter, aeration pump and
The output terminal of frequency converter, aeration pump and frequency converter is connected;Aeration head in 4 sets of aerating systems is respectively arranged on biological aerated filter
In filler, bottom in aerobic-anoxic selection pond, in level-one aeration tank bottom in bottom and two-stage aeration tank;In 4 sets of aerating systems
The communication ends of frequency converter be connected with industrial PC communication ends;
It is discharged orthophosphoric acid root measure control system and includes sampling pipe and online phosphate radical monitor, one end of sampling pipe is arranged on clearly
In pond, the other end of sampling pipe is connected with the water inlet end of online phosphate radical monitor, the communication ends of online phosphate radical monitor
It is connected with industrial PC communication ends.
2. the ANSAOAO continuous flow double sludge denitrification advanced nitrogen dephosphorization according to claim 1 based on On-line Control
Device, which is characterized in that between the industrial PC and on-line oxidation reduction potential meter, between industrial PC and frequency converter,
Between industrial PC and online dissolved oxygen instrument, between industrial PC and online pH analyzers and industrial PC and Electromagnetic Flow
Electrical connection between meter is connected by communication using 485.
3. the ANSAOAO continuous flow double sludge denitrification advanced nitrogen dephosphorization according to claim 1 based on On-line Control
Device, which is characterized in that biological aerated filter top is cylinder type, and lower part is the inverted conical that the cone angle of same diameter is 60 °, circle
Cone and the joint of cylinder are horizontally disposed with stainless steel sieve tray, mesh size 5mm, and filling filler forms packing layer on sieve tray,
Packing material size is 0.6-1.5cm;Water distributor is equipped with right over packing layer;Wherein, the filler is volcanic rock, haydite, quartz
Sand or zeolite.
4. the ANSAOAO continuous flow double sludge denitrification advanced nitrogen dephosphorization according to claim 3 based on On-line Control
Device, which is characterized in that the aeration head in the aerating biological filter pool filler is arranged on above sieve tray, and with sieve tray
Distance is the 1/3 of filler layer thickness.
5. the ANSAOAO continuous flow double sludge denitrification advanced nitrogen dephosphorization according to claim 4 based on On-line Control
Device, which is characterized in that the top of the biological aerated filter is equipped with drain valve, and drain valve is located at the top of packing layer;
The aeration pump being connected with aeration head in aerating biological filter pool filler also by carry the pipeline of normally closed gas solenoid valve with it is anti-
Flushing is connected with aeration head;The backwash is arranged on the bottom of filler with aeration head, and in the top of sieve tray;Described
Normally opened gas solenoid valve is additionally provided on pipeline in aerating biological filter pool filler between aeration head and coupled aeration pump.
6. the ANSAOAO continuous flow double sludge denitrification advanced nitrogen dephosphorization according to claim 1 based on On-line Control
Device, which is characterized in that be equipped with mud scraper in first stage precipitation tank and second-level settling pond.
7. a kind of continuous flow double sludge denitrification advanced nitrogen dephosphorization process is based on On-line Control based on described in claim 1
ANSAOAO continuous flow double sludge denitrification advanced nitrogen dephosphorization apparatus, which is characterized in that include the following steps:
Step(1), the water inlet end in sewage pond after the adjustment enters regulating reservoir, then be conveyed into anaerobic pond and with being returned by sludge by intake pump
It returns the sludge that pump returns to be mixed, discharges phosphorus under anaerobic, the oxidation-reduction electrode of anaerobic pond end setting is supervising
Survey the release of anaerobic pond phosphorus;
Step(2), after anaerobic reaction, mud mixed liquid flows into first stage precipitation tank, and first stage precipitation tank precipitation is separated
Supernatant flows into biological aerated filter, and nitration reaction is carried out in biological aerated filter, and obtained nitrification liquid is filtered from aeration and biological
The discharge outlet in bottom of pond portion enters aerobic-anoxic by pipeline and selects pond;Industrial PC is by controlling aeration head in biological aerated filter
Aeration intensity control the dissolved oxygen concentration of the nitrification liquid flowed out from biological aerated filter between 0.5-1.0mg/L, and
Realize whole nitrifications of ammonia nitrogen;
Step(3), the sludge of first stage precipitation tank sedimentation surmounts pump through the first sludge and is delivered in aerobic-anoxic selection pond, with aeration
The nitrification liquid that biofilter flows into is mixed, and obtains mud mixed liquid;Aerobic-anoxic selects the operation of the aeration pump in pond and stops
The size of aeration intensity when only and running needs to determine according to the oxidation reduction potential control of level-one anoxic pond;
Step(4), mud mixed liquid flows into level-one anoxic pond after aerobic-anoxic selection pond outflow, in the generation of level-one anoxic pond
Denitrifying phosphorus uptake reacts and denitrification denitrogenation reaction, industrial PC are strong by controlling the aeration that aerobic-anoxic selects aeration head in pond
Degree, the first sludge surmount the sludge flow velocity of pump and adjust the oxidation-reduction potential of two-stage aeration tank to control level-one anoxic pond
Oxidation-reduction potential makes denitrification denitrogenation inhale phosphorus reaction and is normally carried out;
Step(5), the mud mixed liquid flowed out from level-one anoxic pond is flowed into level-one aeration tank, by the ammonia nitrogen in mud mixed liquid
Complete oxidative nitration reaction is carried out, while the degradation reaction of aerobic phosphorus absorption reaction and organic matter occurs;The exposure of level-one aeration tank
Gas system detects pH changing rules to determine nitration reaction by increasing or reducing aeration intensity, while by pH measurement systems
Terminal;
When increasing aeration intensity:If pH rises, aeration intensity has been over the terminal of nitration reaction, should reduce aeration
Intensity;If pH declines, nitration reaction is incomplete, should increase aeration intensity;If pH rises after falling before, at this moment aeration is strong
Degree is just at nitrification terminal, using the aeration intensity after increase;
When reducing aeration intensity:If pH declines, aeration intensity has been over the terminal of nitration reaction, should reduce aeration
Intensity;If pH rises, nitration reaction is incomplete, should increase aeration intensity;If pH rises after falling before, at this moment aeration is strong
Degree is just at nitrification terminal, using aeration intensity when not reducing;
Step(6), after reaction, mud mixed liquid flows into two level anoxic pond to aerobic nitrification from level-one aeration tank, with the second dirt
Mud surmounts the sludge that surmounts that pump comes from first stage precipitation tank conveying and is mixed, and carry out second of denitrifying phosphorus uptake reaction and denitrogenation
Reaction;Industrial PC controls the oxidation-reduction potential of two level anoxic pond by the way that the second sludge is controlled to surmount the flow velocity of pump;
Step(7), later, mud mixed liquid flows into two-stage aeration tank and carries out aerobic phosphorus absorption reaction, the oxidation of residual organic substances point
Solution reaction and the nitration reaction of remaining ammonia nitrogen;Industrial PC controls two level to be aerated by controlling the aeration intensity of two-stage aeration tank
The oxidation-reduction potential in pond;
Step(8), last mud mixed liquid flows into second-level settling pond and carries out separation of solid and liquid, and the supernatant after sedimentation is discharged to clear water reserviors
In further settle;The clear purified water of clear water reserviors is discharged to by drainpipe outside device;In the part of second-level settling pond sedimentation
Sludge returns to pump by sludge and starts new cycle back to anaerobic pond, and another part sludge is as excess sludge sludge pump
It is discharged to outside the present apparatus;
Industrial PC adjusts the oxidation of level-one anoxic pond and two level anoxic pond also by measuring the concentration of clear water reserviors orthophosphoric acid root
Former current potential;
Wherein, mud mixed liquid is in each pond residence time:Anaerobic pond 1-2.5h, aerobic-anoxic selection pond 0.2-1h, level-one anoxic
Pond 1-3h, level-one aeration tank 0.5-1.5h, two level anoxic pond 0.5-2h, two-stage aeration tank 0.25-0.5h;
First stage precipitation tank supernatant is 2-8h in the biological aerated filter residence time;
The gas-water ratio of biological aerated filter is:10-40;
The sludge concentration of anaerobic pond, level-one anoxic pond and two level anoxic pond is controlled in the range of 2000mg/L ~ 5000mg/L;
Using flow rate pump of intaking as reference, each flow rate pump ratio control range of the present apparatus:Intake pump 100%, the first sludge surmount pump stream
Speed 40% ~ 70%, the second sludge surmount flow rate pump 0% ~ 15%, and sludge returns to flow rate pump 100% ~ 150%;
Anaerobic pond oxidation reduction potential control range<- 300mv, level-one anoxic pond oxidation reduction potential control range -170 ~ -
100mv, -170 ~ -100mv of two level anoxic pond oxidation reduction potential control range;Two-stage aeration tank oxidation reduction potential control model
It encloses:+0~+120mv.
8. continuous flow double sludge denitrification advanced nitrogen dephosphorization process according to claim 7, which is characterized in that the present apparatus
In sludge retention time be 10-17 days.
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CN107043163B (en) * | 2017-04-17 | 2020-08-25 | 武汉理工大学 | Double-sludge oxidation ditch denitrification dephosphorization device and method |
CN108017152A (en) * | 2018-01-09 | 2018-05-11 | 苏州市清泽环境技术有限公司 | The biological denitrificaion combination pond of controllable Anoxic/Aerobic and technique |
CN111484199B (en) * | 2020-04-22 | 2021-06-18 | 云南大学 | Intermittent double-sludge denitrification AN (AO) n full-nitrification ultra-deep nitrogen and phosphorus removal process |
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CN113415887A (en) * | 2021-08-25 | 2021-09-21 | 国美(天津)水技术工程有限公司 | Biological enhanced denitrification device and application |
CN114772730B (en) * | 2022-04-19 | 2023-06-23 | 青岛思普润水处理股份有限公司 | BFM-based CANON-MBBR enhanced AOA water treatment method and system |
CN114804339B (en) * | 2022-04-19 | 2023-08-22 | 青岛思普润水处理股份有限公司 | BFM-based efficient AOA coupling anaerobic ammonia oxidation sewage treatment method and system |
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