CN206616059U - Sewage disposal system based on anaerobic/anoxic fluidization bio-carrier - Google Patents
Sewage disposal system based on anaerobic/anoxic fluidization bio-carrier Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model is related to technical field of sewage, more particularly to a kind of sewage disposal system based on anaerobic/anoxic fluidization bio-carrier.The sewage disposal system based on anaerobic/anoxic fluidization bio-carrier that the utility model is provided, including pretreatment unit, FBC processing units, final deposition pool, advanced treatment of wastewater unit, sludge deep processing unit, the first dividing cell and the second dividing cell；FBC processing units include FBC anaerobic ponds, FBC anoxic ponds and the Aerobic Pond being sequentially connected；First dividing cell is connected to the mixed liquor in Aerobic Pond carrying out shunting processing with Aerobic Pond, FBC anaerobic ponds, FBC anoxic ponds and final deposition pool respectively；Second dividing cell is connected to the sludge in final deposition pool carrying out reflow treatment with final deposition pool, FBC anaerobic ponds and sludge deep processing unit respectively.The application carries out intensified denitrification and dephosphorization by adding bio-carrier in anaerobic pond and anoxic pond to raw water, and effect is good, energy consumption is low, and reduced investment, operating cost are low.
Description
Technical field
The utility model is related to technical field of sewage, more particularly to a kind of based on anaerobic/anoxic fluidization bio-carrier
Sewage disposal system, and in particular to one kind can improve denitrogenation dephosphorizing efficiency and effluent quality and reduced investment, take up an area it is small, run into
This low sewage disposal system based on anaerobic/anoxic fluidization bio-carrier.
Background technology
At present, national urban wastewater treatment firm water standard is constantly lifted, and denitrogenation dephosphorizing is the difficult point of current sewage disposal
Problem, for ensure denitrogenation dephosphorizing effect, it is necessary into sewage supplementary carbon source.But above-mentioned sewage treatmentmethod exist it is following several
Individual problem：One, biological denitrification process are the conventional handling process of denitrogenation dephosphorizing, but because China's carbon source in urban sewage deficiency causes
The nitric efficiency of sewage constrains the effect of biological phosphate-eliminating nitrogen than relatively low, it is difficult to reach that one-level A as defined in GB18918-2002 is marked
It is accurate；Secondly, sewage treatment plant's winter biological carbon and phosphorous removal there is problem, poor denitrification and dephosphorization effect need to take enhanced biological phosphorus removal
Denitrification process；Thirdly, Sedimentation Problems restriction sewage plant normally run, such as preliminary sedimentation tank spoil disposal is not smooth, anaerobic/anoxic pond silting,
Anaerobic fermentation is not normally functioning, equipment wearing is big；Four, the seasonal variety of surplus sludge volume is big, easily causes the winter
The problem of Ji Yunhang power consumptions height and not enough spring water separation capability；Five, existing municipal wastewater treatment plant waterpower elevation is limited (surplus is small),
The small handling process of the loss of flood peak need to be used to reduce energy consumption；Six, existing municipal wastewater treatment plant limited floor space, need to be using height
The treatment technology and technique of effect；Seven, the yield of existing municipal sewage sludge is big, substantially increases Treatment of Sludge and disposal
Expense；The operation and management eight, become more meticulous is relatively weak；Nine, current city sewage puies forward mark renovation technique difficulty greatly, work
Be pressed for time, task weight.
Utility model content
(1) technical problem to be solved
The purpose of this utility model is：Denitrogenation dephosphorizing efficiency and effluent quality and reduced investment, occupation of land can be improved by providing one kind
The low sewage disposal system based on anaerobic/anoxic fluidization bio-carrier of small, operating cost, to solve existing biological denitrificaion
Dephosphorization process exist dephosphorization nitrogen effect is poor, long processing period, effluent quality is poor, input cost is high and operating cost is high asks
Topic.
(2) technical scheme
The utility model provides a kind of sewage disposal system based on anaerobic/anoxic fluidization bio-carrier, including pre- place
Manage unit, FBC processing units, final deposition pool, advanced treatment of wastewater unit, sludge deep processing unit, the first dividing cell and the
Two dividing cells；The advanced treatment of wastewater unit is connected with the final deposition pool；
The FBC processing units include FBC anaerobic ponds, FBC anoxic ponds and the Aerobic Pond being sequentially connected, the FBC anaerobism
Pond is connected with the pretreatment unit；
First dividing cell is connected with the Aerobic Pond, final deposition pool, FBC anaerobic ponds and/or FBC anoxic ponds respectively,
For the mixed liquor in the Aerobic Pond to be carried out into shunting processing；Second dividing cell is detested with the final deposition pool, FBC respectively
Oxygen pond and the connection of sludge deep processing unit, for the sludge in the final deposition pool to be carried out into reflow treatment.
Wherein, first dividing cell includes backflow mixed liquor pump and residual mixed liquor pump, the backflow mixed liquor pump
It is connected with the FBC anaerobic ponds and/or FBC anoxic ponds, the residual mixed liquor pump is connected with the final deposition pool.
Wherein, second dividing cell include return sludge pump and residual sludge pump, the return sludge pump with it is described
FBC anaerobic ponds are connected, and the residual sludge pump is connected with the sludge deep processing unit.
Wherein, the pretreatment unit includes coarse rack, fine fack and setting pot, preliminary sedimentation tank and the ultra-fine lattice being sequentially connected
Grid, the ultra-fine grid is connected with the FBC anaerobic ponds, and the preliminary sedimentation tank is handled by primary sludge pump and the sludge deep
Unit is connected.
Wherein, the sludge deep processing unit includes sludge concentration tank, digestive system and the sludge dewatering being sequentially connected
System, the sludge concentration tank is connected with the residual sludge pump and primary sludge pump respectively.
Wherein, the application provide the sewage disposal system based on anaerobic/anoxic fluidization bio-carrier also include respectively with
The preliminary sedimentation tank and the air blast computer room of FBC anaerobic ponds connection.
Wherein, the advanced treatment of wastewater unit includes the filtering cloth filtering pool and contact chamber being sequentially connected, the filtering cloth filtering pool
It is connected with the final deposition pool.
(3) beneficial effect
Above-mentioned technical proposal of the present utility model has the following advantages that：The utility model provides a kind of based on anaerobic/anoxic
The sewage disposal system of fluidization bio-carrier, including pretreatment unit, FBC processing units, final deposition pool, advanced treatment of wastewater list
Member, sludge deep processing unit, the first dividing cell and the second dividing cell；Advanced treatment of wastewater unit is connected with final deposition pool；
FBC processing units include FBC anaerobic ponds, FBC anoxic ponds and the Aerobic Pond being sequentially connected, and FBC anaerobic ponds connect with pretreatment unit
Connect；First dividing cell is connected with Aerobic Pond, final deposition pool, FBC anaerobic ponds and/or FBC anoxic ponds respectively, for by Aerobic Pond
Mixed liquor carry out shunting processing；Second dividing cell connects with final deposition pool, FBC anaerobic ponds and sludge deep processing unit respectively
Connect, for the sludge in final deposition pool to be carried out into reflow treatment.The application is based on anaerobic/anoxic fluidization bio-carrier technology,
By adding bio-carrier formation FBC techniques in anaerobic pond and anoxic pond, to carry out intensified denitrification and dephosphorization to raw water, realize complete
Fluidisation, denitrogenation energy consumption must can be saved saving a large amount of denitrifications of traditional wastewater factory while carbon source；Apart from the above, this Shen
The processing system that please be provided also has the advantages that reduced investment, the small, operating cost of occupation of land are low, both can be suitably used for carrying for existing sewage plant
Mark is transformed, production capacity is lifted, energy-saving, while newly-built sewage treatment plant and high-quality recycled water reuse project are also can be suitably used for,
With wide popularizing application prospect.
Brief description of the drawings
Fig. 1 is a kind of the de- of sewage disposal system embodiment based on anaerobic/anoxic fluidization bio-carrier of the utility model
Nitrogen dephosphorization process route flow chart；
Fig. 2 is a kind of the de- of sewage disposal system embodiment based on anaerobic/anoxic fluidization bio-carrier of the utility model
Nitrogen dephosphorization process bio-reaction zone plan；
Fig. 3 is a kind of dirt of the sewage disposal system embodiment based on anaerobic/anoxic fluidization bio-carrier of the utility model
Method for treating water flow chart.
In figure：1：FBC anaerobic ponds；2：FBC anaerobism anoxic pond；3：FBC anoxic ponds；4：Anoxic pond；5：Aerobic Pond；6：Go out
Tank；7：Interior backflow canal；8：Exteenal reflux canal；11：Water inlet；12：Exteenal reflux entrance；13：Interior reflux inlet；14：Bottom is special
Filler impeller；15：Top filler special impeller；16：Bottom special carrier impeller；17：Non- aerobic zone carrier separates dress
Put.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched
The embodiment stated is a part of embodiment of the present utility model, rather than whole embodiments.Based on the reality in the utility model
Apply example, the every other embodiment that those of ordinary skill in the art are obtained on the premise of creative work is not made, all
Belong to the scope of the utility model protection.
Particularly, FBC English name is Fluidizedbiological carriers, and Chinese is fluidised form metaplasia
Thing carrier.FBC techniques are the combination of traditional MBBR techniques and activated sludge process in anaerobism, anoxic section, that is, by means of shifting
The characteristics of dynamic bed biomembrane process, added in biological reaction pool can biofilm fluidization bio-carrier, carrier has higher
Specific surface area, biomembrane can raised growth in carrier surfaces externally and internally.In the present embodiment, using the FBC techniques in anoxic zone
Realize Anammox, short-cut denitrification and conventional denitrification function；Anammox is realized in anaerobic zone, anaerobism is enhanced
Hydrolysis acidification is acted on.
As shown in Figure 1, on the one hand, the utility model embodiment provides a kind of based on anaerobic/anoxic fluidization bio-carrier
Sewage disposal system, including at pretreatment unit, FBC processing units, final deposition pool, advanced treatment of wastewater unit, sludge deep
Manage unit, the first dividing cell and the second dividing cell；Advanced treatment of wastewater unit is connected with final deposition pool；Wherein, final deposition pool is
The important component of activated Sludge System, it, which is acted on, mainly separates sludge, makes clarification of water and carries out sludge condensation.
FBC processing units include FBC anaerobic ponds, FBC anoxic ponds and the Aerobic Pond being sequentially connected, FBC anaerobic ponds and pre- place
Manage unit connection；These three ponds all have the effect of denitrogenation dephosphorizing, the difference is that there occurs releasing for polyP bacteria in FBC anaerobic ponds
Phosphorus；FBC anoxic ponds there occurs that nitrate nitrogen is changed into nitrogen by the denitrification of denitrifying bacteria, and polyP bacteria may inhale phosphorus
Phosphorus may be released or while existing, Aerobic Pond is mainly generation nitration reaction, mineralized nitrogen into nitrate nitrogen, polyP bacteria is excessively inhaled
Phosphorus.
Specifically, bio-carrier formation FBC techniques are added in anaerobic pond anaerobism, a large amount of microorganisms in bio-carrier surface are by dirt
Particulate matter and colloidal substance retention and absorption in water, this is a quick physical process, in more than ten seconds or tens seconds
It can just complete, in the presence of anaerobic bacteria, these bulky grain hard-degraded substances are decomposed into the degradable VFA of small molecule, foot
Enough VFA cause polyP bacteria rapidly and thoroughly to be discharged to phosphorus in anaerobism section, are that the excessive phosphorus of aerobic section absorption is done
Prepare；Fluidization bio-carrier formation FBC techniques are added in anoxic pond, by the biofilm of certain time and are tamed and dociled on bio-carrier
Change, the microenvironment grown suitable for denitrifying bacteria can be formed, be that denitrifying bacteria grows, breeding creates suitable environment.Its
In, the high concentration denitrifying bacterium of enrichment can accelerate system denitrification rate so that anti-nitration reaction is in limited hydraulic retention
It is interior to quickly complete；Simultaneously under fluidized state, the gradient distribution of multiple-microorganism can be formed inside bio-carrier, be can be achieved same
The ability of short-cut denitrification is walked, the Anammox bacteria concentration and activity of system, and the denitrogenation of Neng Shi traditional wastewaters factory had both been improved
This aspect saves energy consumption 40% or so.
In the present embodiment, using the operational mode for just putting A2/O；Specifically, in anaerobic environment, PAOs can only be utilized
Degradable material in sewage, or the VFA produced after hydrolysed ferment；Phosphorus release rate and degradable carbon source in water inlet, especially
VFA quantity is closely related；Denitrifying bacterium is to the intake species of carbon source than a wider spectrum, and the contention ability to VFA is much stronger than
PAOs, inversion A 2/O techniques cause VFA in water largely to be consumed by denitrifying bacterium in anoxic section.Therefore the application is used and just put
A2/O so that raw water after pretreatment fully enters FBC anaerobic ponds, and then causes the carbon source in water to be preferentially used for anaerobism section
PAOs releases phosphorus reaction.
First dividing cell is connected with Aerobic Pond, final deposition pool, FBC anaerobic ponds and/or FBC anoxic ponds respectively, for will be well
Mixed liquor in oxygen pond carries out shunting processing；Second dividing cell is single with the processing of final deposition pool, FBC anaerobic ponds and sludge deep respectively
Member connection, for the sludge in final deposition pool to be carried out into reflow treatment.Wherein, the first dividing cell both can respectively with Aerobic Pond,
Final deposition pool, FBC anaerobic ponds and the connection of FBC anoxic ponds, can also be connected or divide with Aerobic Pond, final deposition pool, FBC anaerobic ponds respectively
It is not connected with Aerobic Pond, final deposition pool, FBC anoxic ponds, specifically sees that actual implementation condition selects corresponding connected mode.
Specifically, the first dividing cell includes backflow mixed liquor pump and residual mixed liquor pump, and backflow mixed liquor pump is detested with FBC
Oxygen pond and/or the connection of FBC anoxic ponds, residual mixed liquor pump are connected with final deposition pool.After in the present embodiment, being handled through Aerobic Pond
Backflow mixed liquor, is on the one hand delivered in FBC anaerobic ponds and FBC anoxic ponds or defeated by the mixed liquor arrived by backflow mixed liquor pump
Deliver in FBC anaerobic ponds or be delivered in FBC anoxic ponds, on the other hand conveyed residual mixed liquor pump by residual mixed liquor pump
Subsequent treatment is carried out to final deposition pool.Wherein, the reflux type of this mixed liquor is referred to as interior backflow.
Specifically, the second dividing cell includes return sludge pump and residual sludge pump, and return sludge pump connects with FBC anaerobic ponds
Connect, residual sludge pump is connected with sludge deep processing unit.In the present embodiment, the sludge obtained after being handled through final deposition pool enters
Backflow and excess sludge pump house, wherein, in the present embodiment, returned sludge is delivered to by FBC anaerobic ponds by return sludge pump
It is interior, and excess sludge is delivered to by sludge deep processing unit progress subsequent treatment by residual sludge pump.Wherein, this sludge
Reflux type be referred to as exteenal reflux.
In the present embodiment, Fig. 2 is a kind of sewage disposal based on anaerobic/anoxic fluidization bio-carrier of the utility model
The denitrification dephosphorization technique bio-reaction zone plan of system embodiment, wherein, this process operation pattern can be entered according to actual conditions
Row regulation, such as can be achieved to flow back in multiple spot water distribution and multiple spot.Specifically, raw water after pretreatment initially enters FBC anaerobic ponds
1, then sequentially pass through FBC anaerobism anoxic pond 2, FBC anoxic ponds 3, anoxic pond 4, Aerobic Pond 5 processing after, entered by effluent trough 6
Final deposition pool carries out subsequent treatment；Wherein, the end of Aerobic Pond 5 will need the mixed liquor flowed back to pass through interior 7, canal of backflow by pump
It is back to according to specific actually required amount in FBC anoxic ponds 3.Wherein, the FBC processing units that the application is provided are for being loaded with dirt
The cell body of water and filler, sets gate in water inlet 11, exteenal reflux entrance 12, interior reflux inlet 13, passes through opening for valve respectively
Close or open degree controls the assignment of traffic of each entrance.Pass through bottom filler special impeller 14, top filler special impeller
15th, bottom special carrier impeller 16 realizes the active fluidization of bio-carrier in pond, passes through non-aerobic zone carrier separating device
17 constrain in the fluidization bio-carrier in FBC anaerobic ponds 1, FBC Yan Yang anoxic ponds 2, FBC anoxic ponds 3 in respective scope,
Realize that carrier is not connected.
Wherein, the application is simulated by hydraulic model and calculated, the combination of different densities bio-carrier, mixer power location
Selection, the layering measure such as energy flow field control solve the problem for realizing that the fluidized state of bio-carrier is difficult, it is final to realize
Good fluidized state in pond.And in anaerobism, anoxic section all using existing pond type, using endless circulation pattern, nothing
Complicated bio-carrier backflow facility is needed, small investment, operating cost is low.
Wherein, the sewage disposal system that the application is provided utilizes final deposition pool bed mud denitrification enhanced biological phosphorus removal.Pass through reality
In the case that border service data relatively shows that final deposition pool mud position is higher, bottom mud layer anti-nitration reaction is obvious.This technology is overturned
Conventional operation, which is tried one's best, avoids the denitrifying operating concept of final deposition pool, and the appropriate denitrification of bed mud is allowed by lifting final deposition pool mud position,
System biological dephosphorization can be conducive to.It is less using the final deposition pool denitrification tolerance that only bottom mud layer is produced, only have fragmentary gas
Bubble is produced, and Mud up-floating amount also has filtering cloth filtering pool to carry out advanced treating within tolerance interval, and subsequently, therefore without total water outlet
Risk exceeded SS.By in the second dividing cell returned sludge (exteenal reflux sludge) in the case that mud position is close to 1.5m
NO3- N concentration reduces 5~10mg/L than water outlet.This greatly reduces nitrate in exteenal reflux sludge and FBC anaerobic ponds is released
The influence of phosphorus, thus maintain second pond mud position to be conducive to system biological dephosphorization in 1.5m or so (final deposition pool mud position should not be too high, holds
Easily occur to run mud phenomenon).
Specifically, in the present embodiment, pretreatment unit include be sequentially connected coarse rack, fine fack and setting pot, just
Heavy pond and ultra-fine grid, ultra-fine grid are connected with FBC anaerobic ponds, and preliminary sedimentation tank passes through primary sludge pump and sludge deep processing unit
Connection.Wherein, pretreatment unit also includes sewage lifting pump house, and it is required that the raw water that upstream is come is promoted into coarse rack filtering
Height.Raw water is handled via coarse rack, fine fack and setting pot successively, filters out the elutriation of grid slag and sand setting, and by first
Heavy pond carries out sludge fermentation processing, obtains just heavy mixed liquor and primary sludge, wherein, primary sludge is entered by primary sludge pump
Primary sludge pump house, and subsequent treatment is carried out by pipeline to sludge deep processing unit；Just heavy mixed liquor is then by super
Fine fack carries out entering FBC anaerobic ponds after further filtering, to carry out denitrification dephosphorization technique.Particularly, the application propose with
Using the preliminary sedimentation tank reinforced phosphor-removing modification scheme that polyP bacteria is main purpose, preliminary sedimentation tank load is improved, carbon source loss is reduced.Simultaneously
Also preliminary sedimentation tank bed mud can be introduced anaerobic pond, with enhanced biological phosphorus removal.Specifically, sludge deep processing unit includes connecting successively
Sludge concentration tank, digestive system and the sludge dewatering system connect, sludge concentration tank respectively with residual sludge pump and primary sludge pump
Connection.Wherein, sludge concentration tank typically uses gravity concentration, also can set sludge concentrator in concentration basin, to improve concentration effect
Really；Sludge after concentration, after being handled by Digestive, moisture percentage in sewage sludge can be down to 95% or so；Eventually through sludge
After dewatering system processing, mud cake is obtained, other places are transported in addition.Wherein, sludge dewatering can be to be air-dried natural-dehydration,
It can also be mechanical dehydration.Specifically, the sludge after concentration adds flocculant before filter press is entered, and improves flocculating effect；
After mechanical dehydration, moisture percentage in sewage sludge is reduced to 70%~80%, and volume is original 1/4~1/6.
Further, the sewage disposal system based on anaerobic/anoxic fluidization bio-carrier that the application is provided also includes dividing
The air blast computer room not being connected with preliminary sedimentation tank and FBC anaerobic ponds.To prevent noise pollution, protection operating personnel's personal safety and extension
The service life of blower fan.Specifically, advanced treatment of wastewater unit includes the filtering cloth filtering pool and contact chamber being sequentially connected, filtering cloth filtering pool
It is connected with final deposition pool.In the present embodiment, using fibre turntable filtering cloth filtering pool, effluent quality is good and stably, it is ensured that water outlet SS
Below 6mg/L is reached, country-level A standards are reached.Meanwhile, using fibre turntable filtering cloth filtering pool operating cost it is low and beneficial to improve
The security performance of operating personnel.Sewage after being handled through fibre turntable filtering cloth filtering pool can add efficient bleaching agent (NaClO, secondary chlorine
Sour sodium), and fully reacted in contact chamber, discharged with reaching after outer row's standard.
On the other hand, as shown in figure 3, the utility model additionally provide it is a kind of based on anaerobic/anoxic fluidization bio-carrier
Sewage water treatment method, including：
Step 1, raw water is pre-processed；Wherein, main elutriation, the preliminary sedimentation tank included by grid slag and sand setting is pre-processed
The fermentation technique of sludge, to improve the concentration of dissolubility BOD in raw water, and improves C/N ratios, is that follow-up denitrification dephosphorization technique is carried out
Preparation.
Step 2, pretreated raw water is sequentially sent to FBC anaerobic ponds, FBC anoxic ponds and Aerobic Pond carries out denitrogenation dephosphorizing
PROCESS FOR TREATMENT obtains mixed liquor；
Using FBC anaerobic ponds, anaerobism carrier plays good promotion to system biological dephosphorization, specifically, and carrier surface is big
Measure microorganism the particulate matter in sewage and colloidal substance are retained and adsorbed, this was a quick physical process, at more than ten seconds
Or can just be completed in tens seconds, in the presence of anaerobic bacteria, these bulky grain hard-degraded substances are decomposed into small molecule easy
The VFA of degraded, enough VFA cause polyP bacteria rapidly and thoroughly to be discharged to phosphorus in anaerobism section, are that aerobic section is inhaled
Excessive phosphorus is received to prepare；
Using FBC anoxic ponds, the conventional denitrification and short-cut denitrification ability of anoxic carrier high-efficiency, specifically, in anoxic
Pond adds the biofilm and domestication on fluidization bio-carrier, carrier by certain time, can be formed suitable for denitrifying bacteria growth
Microenvironment, be denitrifying bacteria growth, breeding create suitable environment；The high concentration denitrifying bacterium of enrichment can accelerate system
Denitrification rate so that anti-nitration reaction is quickly completed in limited hydraulic detention time；Simultaneously under fluidized state, carrier
Inside can form the gradient distribution of multiple-microorganism, and the ability of synchronization short-cut denitrification can be achieved.
With reference to using FBC anaerobic ponds and FBC anaerobic ponds to realize Anammox.Anaerobic ammonia oxidizing bacteria (Anaerobic
Ammonium-oxidizing bacteria) it is a class bacterium, belong to floating mould door, biomembrane is in brown red in Practical Project
Color, specifically includes (Candidatus Brocadia), (Candidatus Kuenenia) and (Candidatus
Scalindua) (" Anammoxoglobus) category.They can be in anaerobic environment, by ammonium ion (NH4 +) use nitrite anions
(NO2 -) it is oxidized to nitrogen：
NH4 ++NO2 -→N2+2H2O, Δ Go=-357kJ/mol
They are significant to global nitrogen cycle, are also important bacterium in sewage disposal.
The anaerobic ammonia oxidation process that nineteen ninety is developed by Dutch Delft technology universities is a kind of sewage disposal skill of innovation
Art, its technological principle is that anaerobic ammonia oxidizing bacteria (Anaerobic ammoniumoxidation bactria) is under anaerobic state
With NH3- N is electron acceptor, and cultured water is final electron acceptor, by NH3- N and cultured water are changed into nitrogen.Anaerobism ammonia oxygen
Change belongs to chemautotrophy process, and its denitrification does not need organic carbon source.Compared with traditional denitrification process, Anammox is not only
Do not need additional carbon, additionally it is possible to save 50% quantity of alkali consumption, 62.5% oxygen-supplying amount, and the sludge output of short distance nitration is about tradition
The 15% of denitrification process, can be achieved sludge reduction.So, the difficulty of additional electron donor is needed in conventional denitrification technique
Topic is just well solved, and relative to traditional handicraft, it is to O2Consumption and there is significant reduction to COD demands,
Thus meet the requirement of energy-saving and emission-reduction.
This technique is using activated sludge and biological membrane compound technology, the anaerobism based on anaerobism, anoxic fluidization bio-carrier
Ammoxidation technology, is carrier by fluidization bio-carrier, anaerobic ammonia oxidizing bacteria is solidificated on fluidization bio-carrier, to detest
Anaerobic ammonium oxidation bacterium provides good growing environment, substantially increases the Anammox bacteria concentration and activity of system, realizes
ANAMMOX technologies remove system TN, and the index such as nitrogen, phosphorus, COD in sewage is efficiently removed.
Step 3, the mixed liquor of acquisition shunted, a part of mixed liquor directly sends FBC anoxic ponds back to, and another part is mixed
Close liquid and be sent to final deposition pool progress and handle and obtain sludge and sewage；Specifically, the mixed liquor flowed out from Aerobic Pond is carried out into part to return
It is back in stream, a part in FBC anoxic ponds, remainder, which is added, is sent to final deposition pool progress subsequent treatment after Dephosphorization reagent, with
Obtain sludge and sewage；The mixed liquor in FBC anoxic ponds is partly refluxed to, except playing a part of providing carbon source, is additionally favorable for carrying
The Anammox bacteria concentration and activity of high system.
Step 4, the sewage of acquisition is discharged into decontaminated water advanced treatment unit carries out subsequent treatment；The sludge of acquisition is carried out
Shunting, a part of sludge directly sends FBC anaerobic ponds back to, and another part sludge is sent to sludge deep processing unit and subsequently located
Reason.Specifically, the application drops by the sludge obtained in step 3 after final deposition pool uses pre-concentration technical finesse to returned sludge
The nitrate amount of low backflow, improves the dephosphorization ability of system；Extend anaerobism, anoxic residence time simultaneously, make full use of system
Internal carbon source carries out denitrogenation dephosphorizing, to save carbon source.Further, in step 2, in addition to FBC anaerobic ponds and FBC anoxic ponds
Appropriate raw water is inside each led into, carbon source is provided for denitrification dephosphorization technique.Specifically, during denitrification dephosphorization technique is carried out,
The application into FBC anaerobic ponds and FBC anoxic ponds by each leading into appropriate raw water, in addition to providing carbon source, is additionally operable to improve
Anammox bacteria concentration and activity, can make traditional wastewater factory denitrogenation this aspect save energy consumption 40% or so.Due to strengthening
The biological treatment effect of anaerobism, anoxic section, make use of the advantage of biofilm system, the more traditional one-level A standard sewages of sludge yield
Treatment plant reduces 15%.Operating cost is low, good economy performance.Further, in step 1, pretreatment includes carrying out in advance raw water
Filtering, and the raw water after pre-filtering is handled by preliminary sedimentation tank, just heavy mixed liquor and primary sludge are obtained, just heavy mixed liquor
By sending into FBC anaerobic ponds after ultra-fine grid further filtering；Primary sludge is sent to sludge deep processing unit and subsequently located
Reason.The application uses above-mentioned pretreatment mode, traditional advection preliminary sedimentation tank HRT=2h can be shorten into 1h, can ensure mud
The bulky grains such as sand reduce loss of the carbon source in preliminary sedimentation tank as far as possible on the premise of precipitating.Preliminary sedimentation tank water outlet after the method for operation changes
VAF contents are average to be promoted to 44mg/L by 35mg/L, improves 26%.Preliminary sedimentation tank bed mud is built simultaneously and utilizes facility, when system carbon
In the case that source is not enough, sludge introducing FBC anaerobic pond of the just portion of sinking to the bottom by hydrolysed ferment can also be released phosphorus for anaerobism section and be provided
More carbon sources.
The sewage disposal system that the application is provided is domestic first Application in large-scale production property engineering, is lacked using anaerobism
Oxygen fluidization bio-carrier process strengthening denitrogenation dephosphorizing, the technology is a kind of energy-saving carbon technique, realizes that system internal carbon source is abundant
Utilize.This demonstration project TN clearances 87.6%, TP clearances 96.1%, water outlet TN average values 7.0mg/L, TP average value
0.19mg/L, hence it is evident that be better than《Urban wastewater treatment firm pollutant emission standard》(GB18918-2002) level of one-level A standards,
Leading indicator is close to or up DB11/890-2012《Urban wastewater treatment firm Sewage Water Emissions》Beijing region A standards.
To better illustrate the sewage disposal system based on anaerobic/anoxic fluidization bio-carrier provided using the application
The beneficial effect reached, is illustrated by taking an engineering construction as an example below：
The total floor space of certain sewage treatment plant is 37.44hm2, service area about 89km2.First stage of the project construction scale is 25
×104m3/ d, the second stage of the project construction scale is 12.5 × 104m3/ d, existing total 37.5 × 104m for the treatment of scale3/d.Former water outlet water
Matter is performed《Urban wastewater treatment firm pollutant emission standard》(GB18918-2002) one-level B standard, wherein first stage of the project
In October, 2008 builds up and put into operation, starts upgrading in November, 2012, the stable effluent quality of in August, 2013 reaches one-level A
Standard.The sewage disposal strengthening denitrogenation dephosphorization technique based on anaerobic/anoxic fluidization bio-carrier is used after transformation completely, specifically
Technological parameter is as follows.
1) pretreatment and advanced treatment
(1) the ultra-fine grid of swinging web plate in 4 3.5mm apertures is increased after preliminary sedimentation tank；
(2) advanced treating increases by 5 groups of filtering cloth filtering pools, individual equipment day output 50000m3。
2) preliminary sedimentation tank transformation digging utilization carbon source
Preliminary sedimentation tank is run number and be reduced to every group 3 from every group 6 of design, hydraulic detention time is reduced to 1h.
3) anaerobism, anoxic zone transformation and introducing FBC technologies
Process operating parameters：Return current ratio of the mixed liquid 90~150%, exteenal reflux 50~90%, mixed liquor sludge concentration is
4500mg/L or so.
The carbon source of 3.1 pairs of waters carries out rational Distribution utilization
Water factory's operational mode is changed to just put A2/O from inversion A 2/O.
1.6hHRT region, which is marked off, from aerobic section by anoxic section HRT is extended for 3.6h from original 2h；Aerobic HRT from
8h is reduced to 6.4h.
3.2 add bio-carrier intensified denitrification and dephosphorization
Fluidization bio-carrier is in cylinder, and surface is in undaform, and center is in network structure, and specification is 25 × 12mm of Ф,
Add than being about 15%~20%.
4) final deposition pool denitrification is strengthened
Final deposition pool mud position is maintained in 1.5m or so, while water outlet DO controls are in below 1.5mg/L.
Table 1 transforms the water quality data contrast table of front and rear Inlet and outlet water
Note (table 1)：1st, numerical value is monthly average value in bracket；2nd, TP data are derived from before chemical dephosphorization unit in table, no
Represent water factory's final outflow water；3rd, in March, 2012 is data before this technology is implemented；" 2015.1~7 " refer in January, 2015 extremely
Obtained by all routine testing data summarizations in July.
Stable water outlet is better than urban wastewater treatment firm pollutant emission standard (GB18918-2002) one-level A standards after transformation
Level, leading indicator arrives or close to Beijing up to interior《Urban wastewater treatment firm pollution discharge standard》A standards.Also simultaneously
Following beneficial effects are reached, such as：
(1) the newly-increased processing unit of this upgrading is few, and water factory manages operating personnel, therefore labour cost without increase
It is basically unchanged.Dephosphorization mainly uses biological method after this technology is implemented, and no chemical sludge is produced, saved every year because adding chemical drugs
Agent increases by 1,500,000 yuan of the disposal expense of sludge.(2) although system adds many equipment, but passes through Process operating parameters
Optimization, especially realizes Anammox, reduces the residence time of aerobic zone, saved part aeration quantity, realize energy-conservation
Consumption reduction.0.230 degree of ton water average current drain before this technology is implemented, after one-level B upgrading one-levels A pollutant abatement amount and transformation
Installed power is calculated, and improved ton water average current drain should be 0.280 degree.This technology changes after implementing by prolonged technology
Enter and the stable generation of Anammox denitrification reaction, existing four dirty 0.246 degree of phase ton water actual average power consumption, more theoretical power consumption drop
It is low by 12%.Just calculated according to 0.7 yuan of kilowatt-hour, water factory one-level B upgradings one-level A, the average water process electricity charge per ton only increase by 0.011
Member.(3) this technology relies on biological phosphate-eliminating substantially after implementing, and only this item can save 9,000,000 yuan of medicament expense use every year.Thus, originally
The sewage disposal system based on anaerobic/anoxic fluidization bio-carrier that application is provided can upgrade in nationwide sewage treatment plant
Promoted in transformation and reclaimed wastewater reuse market.
In summary, the utility model provides a kind of sewage disposal system based on anaerobic/anoxic fluidization bio-carrier
System, including pretreatment unit, FBC processing units, final deposition pool, advanced treatment of wastewater unit, sludge deep processing unit, first point
Flow unit and the second dividing cell；Advanced treatment of wastewater unit is connected with final deposition pool；FBC processing units include what is be sequentially connected
FBC anaerobic ponds, FBC anoxic ponds and Aerobic Pond, FBC anaerobic ponds are connected with pretreatment unit；First dividing cell respectively with it is aerobic
Pond, final deposition pool, FBC anaerobic ponds and/or the connection of FBC anoxic ponds, for the mixed liquor in Aerobic Pond to be carried out into shunting processing；Second
Dividing cell is connected with final deposition pool, FBC anaerobic ponds and sludge deep processing unit respectively, for the sludge in final deposition pool to be carried out
Reflow treatment.The application is based on anaerobic/anoxic fluidization bio-carrier technology, by adding life in anaerobic pond and anoxic pond
Thing carrier formation FBC techniques, to carry out intensified denitrification and dephosphorization to raw water, realize fluidisation completely, traditional wastewater factory is a large amount of saving
Denitrification must can save denitrogenation energy consumption while carbon source；Apart from the above, the processing system that the application is provided, which also has, throws
Money saves, takes up an area the low advantage of small, operating cost, and both can be suitably used for existing sewage plant puies forward mark transformation, production capacity lifting, energy-conservation drop
Consumption, while newly-built sewage treatment plant and high-quality recycled water reuse project are also can be suitably used for, with wide popularizing application prospect.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacement；And these modifications or replacement, the essence of appropriate technical solution is departed from each embodiment technology of the utility model
The spirit and scope of scheme.
Claims (7)
1. a kind of sewage disposal system based on anaerobic/anoxic fluidization bio-carrier, it is characterised in that：Including pretreatment unit,
FBC processing units, final deposition pool, advanced treatment of wastewater unit, sludge deep processing unit, the first dividing cell and the second shunting are single
Member；The advanced treatment of wastewater unit is connected with the final deposition pool；
The FBC processing units include the FBC anaerobic ponds, FBC anoxic ponds and the Aerobic Pond that are sequentially connected, the FBC anaerobic ponds with
The pretreatment unit connection；
First dividing cell is connected with the Aerobic Pond, final deposition pool, FBC anaerobic ponds and/or FBC anoxic ponds respectively, is used for
Mixed liquor in the Aerobic Pond is subjected to shunting processing；Second dividing cell respectively with the final deposition pool, FBC anaerobic ponds
And the connection of sludge deep processing unit, for the sludge in the final deposition pool to be carried out into reflow treatment.
2. the sewage disposal system according to claim 1 based on anaerobic/anoxic fluidization bio-carrier, it is characterised in that：
First dividing cell includes backflow mixed liquor pump and residual mixed liquor pump, the backflow mixed liquor pump and the FBC anaerobism
Pond and/or the connection of FBC anoxic ponds, the residual mixed liquor pump are connected with the final deposition pool.
3. the sewage disposal system according to claim 1 based on anaerobic/anoxic fluidization bio-carrier, it is characterised in that：
Second dividing cell includes return sludge pump and residual sludge pump, and the return sludge pump is connected with the FBC anaerobic ponds,
The residual sludge pump is connected with the sludge deep processing unit.
4. the sewage disposal system according to claim 3 based on anaerobic/anoxic fluidization bio-carrier, it is characterised in that：
The pretreatment unit includes coarse rack, fine fack and setting pot, preliminary sedimentation tank and the ultra-fine grid being sequentially connected, the ultra-fine lattice
Grid are connected with the FBC anaerobic ponds, and the preliminary sedimentation tank is connected by primary sludge pump with the sludge deep processing unit.
5. the sewage disposal system according to claim 4 based on anaerobic/anoxic fluidization bio-carrier, it is characterised in that：
The sludge deep processing unit includes sludge concentration tank, digestive system and the sludge dewatering system being sequentially connected, the sludge
Concentration basin is connected with the residual sludge pump and primary sludge pump respectively.
6. the sewage disposal system according to claim 4 based on anaerobic/anoxic fluidization bio-carrier, it is characterised in that：
Also include the air blast computer room being connected respectively with the preliminary sedimentation tank and the FBC anaerobic ponds.
7. the sewage disposal system according to claim 1 based on anaerobic/anoxic fluidization bio-carrier, it is characterised in that：
The advanced treatment of wastewater unit includes the filtering cloth filtering pool and contact chamber being sequentially connected, and the filtering cloth filtering pool connects with the final deposition pool
Connect.
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