CN207827966U - A kind of high-efficiency biological denitrification reactor - Google Patents
A kind of high-efficiency biological denitrification reactor Download PDFInfo
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- CN207827966U CN207827966U CN201721865001.8U CN201721865001U CN207827966U CN 207827966 U CN207827966 U CN 207827966U CN 201721865001 U CN201721865001 U CN 201721865001U CN 207827966 U CN207827966 U CN 207827966U
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Abstract
The utility model discloses a kind of high-efficiency biological denitrification reactor, reactor, including first reactor and second reactor are provided with aerator in first reactor, the short-cut denitrification process for providing ammonia nitrogen waste water；Setting is disposed with water distribution cap layers, composite filling layer, three phase separator and water distributor from the bottom up in second reactor, several connectors are evenly equipped on water distributor；Water distribution cap layers are evenly distributed with several cloth water caps, and each cloth water cap includes linkage section and undergauge section, and one end of linkage section is connect with one end of undergauge section, and the other end of linkage section is fixed on the bottom of second reactor, and the other end of undergauge section constitutes wastewater outlet；Connector quantity on water distributor is identical as the quantity of cloth water cap of water distribution cap layers, and water distributor is each connected between connector and a cloth water cap, and water distributor is connected to the linkage section of cloth water cap；It is attached with ammonia oxidizing bacteria on composite filling layer.
Description
Technical field
The utility model belongs to field of waste water treatment, and in particular to a kind of high-efficiency biological denitrification reactor.
Background technology
Ammonia nitrogen refers in water with free ammonia (NH3) and ammonium ion (NH4 +) nitrogen existing for form, ammonia nitrogen is the battalion in water body
Element is supported, the eutrophication for generating water body can be caused, be the main oxygen consumption pollutant in water body, to fish and certain aquatic lifes
Object is toxic.Ammonia nitrogen in water can be converted to nitrite under certain condition, if long-term drinking, the nitrite in water
It will be combined with protein and form nitrosamine, this is a kind of strong carcinogen, totally unfavorable to health.
High-concentration ammonia nitrogenous wastewater is mainly derived from steel, oil refining, chemical fertilizer, inorganic chemical industry, ferroalloy, glass manufacture, meat
The industrial processes such as processing, livestock-raising and Feed Manufacturing.Existing market mostly uses blow-off method, chemical precipitation method, traditional nitre
Change denitrification method；First two method operating cost is high, and later approach one-time investment is higher, and processing capacity is limited.
The current generally existing difficult control of reaction conditions of anaerobic ammonia oxidation process, the relatively low problem of bacterium rate.Basic reason
Be that ammonia oxidizing bacteria has differences with nitrite bacterium in physiological property, anaerobic ammonium oxidizing bacteria AAOB to oxygen extremely
Sensitivity, oxygen-resistant ability is extremely low, and the nitrite bacterium during the anti-nitration reaction of Anammox reaction front section needs
Consume oxygen.The control condition of two kinds of microbe survivals is different, and anaerobic ammonia oxidation process is caused to be joined in operating implementation process
Number is difficult control, and system is unstable, eventually leads to water outlet situation not up to standard.
Utility model content
Technical problem present in for the above-mentioned prior art, it is de- that the purpose of this utility model is to provide a kind of high-performance bio
Analysis.To solve same reactor difference bacteria group culture, the unstable disadvantage of impact, effluent quality is easily caused.
In order to solve the above technical problems, the technical solution of the utility model is：
Anaerobic ammonia oxidation process is divided into two technique units, including the first reaction by a kind of high-efficiency biological denitrification reactor
Device and second reactor are provided with aerator in first reactor, the short-cut denitrification process for providing ammonia nitrogen waste water；
Setting is disposed with water distribution cap layers, composite filling layer, three phase separator and cloth from the bottom up in second reactor
Hydrophone is evenly equipped with several connectors on water distributor.Carry out the ammoxidation reaction process of second stage；
Water distribution cap layers are evenly distributed with several cloth water caps, and cloth water cap is arranged using point type, ensure that water distribution is uniform and stable；
Connector quantity on water distributor is identical as the quantity of cloth water cap of water distribution cap layers, and each connector and a cloth water cap
Between be connected with water distributor, water distributor is connected to the linkage section of cloth water cap；
It is attached with ammonia oxidizing bacteria on composite filling layer.
Three phase separator realizes the three phase separation of nitrogen, ammoxidation strain, sewage.
Ammonia oxidizing bacteria in anaerobic ammonia oxidation process is carried out with nitrite bacterium to separate hot housing, according to anaerobism
Reaction process is divided into two parts by the reaction principle of ammonia oxidation process, and first part is short-cut denitrification process, is happened at first
In reactor, hot housing nitrite bacteria, second part be ammoxidation reaction process, hot housing anaerobic ammonium oxidizing bacteria,
It occurs in the second reactor.Two parts control operating parameter respectively according to reaction condition, are conducive to the control of parameter in this way, together
When ensure system stable operation.
Second reactor bottom uses point type cloth water cap water distribution, ensures that reactor bottom water distribution is uniform, while passing through water distribution
Cap flow design ensures the flow control that rises overally of reactor in 0.4-0.6m/h, due to reactor ammoxidation strain concentration
It is higher, while there is settleability, it is designed by cloth water cap and ensures that strain keeps suspended state in the reactor, make strain and sewage
It is come into full contact with, ensures removal efficiency.
Preferably, the ratio between maximum gauge and minimum diameter of the undergauge section of cloth water cap are 2-3:1.
It is further preferred that a diameter of 32mm of the outlet end of cloth water cap.
Preferably, the density that cloth water cap is distributed in second reactor bottom is 1-2/m2。
Preferably, the distance between bottom Yu second reactor bottom of the composite filling layer are 90-110cm.
Composite filling is arranged in second reactor, is used for ammoxidation strain biofilm, increases the contact area of strain and sewage, together
When improve strain concentration, prevent tiny strain from being flowed out with sewage.Three phase separator, reaction process is arranged in second reactor simultaneously
Middle generation ammonia oxidizing bacteria absorbs ammonia nitrogen and nitrite anions, is converted into nitrogen, nitrogen adsorption makes strain react on strain surface
Rise in device, detached when strain, sewage, nitrogen reach three phase separator, nitrogen is collected discharge, strain and nitrogen point
Increase from rear proportion, be deposited to bottom, sewage is drained by three phase separator, and sewage, nitrogen, bacterium are realized by three phase separator
The three phase separation of kind ensures standard water discharge discharge.
Preferably, the thickness of the composite filling layer is 2.0m.Composite filling layer can be such that ammonia oxidizing bacteria adheres to, and can
To increase strain and waste water area, while ammonia oxidizing bacteria concentration is improved, improves disposed of in its entirety load, overcome traditional reaction
The common load of device is not high, the excessive problem of device.
Preferably, the aerator is that can promote aerator.Traditional aerator is solved because of partial destruction, needs entirety
The drawbacks such as halt production.
It is further preferred that the aerator includes 3-5 set membrane tube aerators.According to the fluctuation of water quality, adjust in time
Aerator aperture, stringent control operation dissolved oxygen content, if certain set aerator therein damages, by can lifting device can
It to be replaced in time, while being aerated using other aerators, to prevent the generation that need to integrally stop production.
Using the processing method for the high ammonia-nitrogen wastewater that above-mentioned high-efficiency biological denitrification reactor carries out, include the following steps：
1) high ammonia-nitrogen wastewater is passed through to first reactor, and is aerated into first reactor, carry out short-cut denitrification
Process, it is 1.1-1.5mg/L to control dissolved oxygen concentration in high ammonia-nitrogen wastewater, and pH value 7.3-7.8, temperature is 30~35 DEG C；
2) high ammonia-nitrogen wastewater after being reacted in first reactor is delivered to the water distributor of second reactor, and passes through water distribution
Cap is evenly distributed on the bottom of second reactor, and the pH value for adjusting high ammonia-nitrogen wastewater is 6.7-8.3, and temperature is 30~34 DEG C, ammonia
A concentration of 1010-1050cellmL of oxidizing bacteria-1。
Preferably, in step 1), the aeration is intermittent aerating.
Preferably, the upflow velocity of high ammonia-nitrogen wastewater in the second reactor is 0.4-0.6m/h.To prevent ammoxidation thin
Bacterium deposits in the second reactor.
The operation principle of the utility model is：
Wherein, leading portion reaction is that short-cut nitrification and denitrification reacts, and under low DO condition, nitrite bacterium passes through Asia
Part mineralized nitrogen is nitrite anions by nitration reaction, and process nitrite bacterium needs to consume basicity and oxygen, in leading portion
In reaction process, short-cut nitrification technology requires nitration reaction to rest on Nitrification Stage, and water outlet nitrite is accumulated, and nitre
Phosphate content is low, while ensuring NH4 +-N/NO2 -- N is 1:1 or so.The nitrite that reaction generates is subsequent ammoxidation reaction
It lays the foundation, main function is：First, the premise as azanol；Second is that converged as electronics, the electronics that disposition reaction generates；Three
It is that reducing equivalent is generated during nitrite-oxidizing is at nitrate as the energy, the reaction of generation is：
NH4 ++HCO3 -+0.8O2→0.55NH4 ++0.45NO2 -+CO2+1.5H2O
The back segment ammoxidation reaction stage is with nitrite (NO-2) under low DO condition for electron acceptor, with NH4 +, by ammonia (NH4 +) it is converted to nitrogen (N2), simultaneous fixes CO by electron donor of nitrite2And generate nitrate
(NO3 -) bioprocess, wherein mineralized nitrogen process be anaerobic ammonia oxidizing bacteria using azanol as oxidant, ammonium oxidation Cheng Lian
Ammonia, hydrazine are reoxidised into the process of nitrogen, and the reaction of generation is：
NH4 ++1.31NO2 -+0.066HCO3 -+0.13H+→N2+0.26NO3 -+0.066CH2O0.5N0.15+2H2O。
The beneficial effects of the utility model are：
Ammonia oxidizing bacteria in anaerobic ammonia oxidation process is carried out with nitrite bacterium to separate hot housing, according to anaerobism
Reaction process is divided into two parts by the reaction principle of ammonia oxidation process, and first part is short-cut denitrification process, is happened at first
In reactor, hot housing nitrite bacteria, second part is Anammox reaction process, and hot housing Anammox is thin
Bacterium occurs in the second reactor.Two parts control operating parameter respectively according to reaction condition, are conducive to the control of parameter in this way
System, while ensureing system stable operation.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the improper restriction to the application for explaining the application.
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the structural schematic diagram of first reactor；
Fig. 3 is the vertical view figure structure schematic representation of first reactor；
Fig. 4 is the structural schematic diagram of water distributor；
Fig. 5 is the attachment structure schematic diagram of water distributor；
Fig. 6 is the structural schematic diagram of cloth water cap；
Fig. 7 is the structural schematic diagram of composite filling.
Wherein, 1, first reactor, 2, second reactor, 3, aerator, 4, elevator pump, 5, water distributor, 6, three-phase separate
From device, 7, water distributor, 8, composite filling, 9, air hose, 10, valve, 11, membrane tube aeration device, 12, cloth water cap.
Specific implementation mode
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
As shown in Fig. 1, Fig. 4, Fig. 5 and Fig. 6, a kind of high-efficiency biological denitrification reactor, including first reactor 1 and second is instead
Device 2 is answered, aerator 3 is provided in first reactor 1, the short-cut denitrification process for providing ammonia nitrogen waste water；
Setting is disposed with water distribution cap layers, composite filling layer, 6 and of three phase separator from the bottom up in second reactor 2
Water distributor 5 is evenly equipped with several connectors on water distributor 5；Water distribution cap layers are evenly distributed with several cloth water caps 12, and each cloth water cap 12 includes
One end of linkage section and undergauge section, linkage section is connect with one end of undergauge section, and the other end of linkage section is fixed on second reactor
Bottom, the other end of undergauge section constitutes wastewater outlet；
Connector quantity on water distributor 5 is identical as the quantity of cloth water cap 12 of water distribution cap layers, and each connector and a cloth
Water distributor 7 is connected between water cap 12, water distributor 7 is connected to the linkage section of cloth water cap 12；It is attached with ammoxidation on composite filling 8
Bacterium.
Ammonia oxidizing bacteria in anaerobic ammonia oxidation process is carried out with nitrite bacterium to separate hot housing, according to anaerobism
Reaction process is divided into two parts by the reaction principle of ammonia oxidation process, and first part is short-cut denitrification process, is happened at first
In reactor, hot housing nitrite bacteria, second part is Anammox reaction process, and hot housing Anammox is thin
Bacterium occurs in the second reactor.Two parts control operating parameter respectively according to reaction condition, are conducive to the control of parameter in this way
System, while ensureing system stable operation.
The ratio between maximum gauge and minimum diameter of the undergauge section of cloth water cap 12 are 2-3:1.The diameter of the outlet end of cloth water cap
For 80mm.The density that cloth water cap is distributed in second reactor bottom is 1-2/m2.The bottom of composite filling layer is anti-with second
It is 100cm to answer the distance between device bottom.The thickness of the composite filling layer is 2.0m.Composite filling layer can make ammoxidation thin
Bacterium adheres to, and can increase the quantity of the ammonia oxidizing bacteria of attachment, improves disposed of in its entirety load, traditional reactor is overcome commonly to bear
Lotus is not high, the excessive problem of device.
As shown in Figures 2 and 3, the aerator 3 is that can promote aerator.Traditional aerator is solved because part is damaged
Bad, the drawbacks such as need to integrally stop production.The aerator includes 3-5 sets membrane tube aerator 11 and air hose 9, by air hose 9 to
It is passed through air in aerator, valve 10 is provided on air hose 9, to control keying or the circulation of air.According to the wave of water quality
It is dynamic, aerator is adjusted in time and opens water, strictly control operation dissolved oxygen content, if certain set aerator therein damages,
Other aerators can be continuing with to be aerated, to prevent the generation that need to integrally stop production.
As can be seen from FIG. 7, composite filling is to make plastic disks clinching into double-round big plastic hoop, by hydroformylation fiber or terylene
Silk is pressed on the ring of ring, and fibre bundle is made to be uniformly distributed；Inner ring is flakes plastics branch, can biofilm, also increase contact surface
Product improves reaction efficiency.
Leading portion reaction is that short distance nitration reacts, and reaction principle is：
NH4 ++HCO3 -+0.8O2→0.55NH4 ++0.45NO2 -+CO2+1.5H2O
Under low DO condition, part mineralized nitrogen is nitrite anions by nitrosation reaction by nitrite bacterium,
Process nitrite bacterium needs to consume basicity and oxygen, and in leading portion reaction process, short-cut nitrification technology requires nitrification anti-
Nitrification Stage should be rested on, water outlet nitrite is accumulated, and nitrate content is low, while ensuring NH4 +-N/NO2 -- N exists
1:1 or so.The nitrite that reaction generates is that subsequent ammoxidation reaction lays the foundation, and main function is：First, as hydroxyl
The premise of amine；Second is that converged as electronics, the electronics that disposition reaction generates；Third, as the energy, in nitrite-oxidizing at nitric acid
Reducing equivalent is generated during salt.
Control condition：
Dissolved oxygen (DO) concentration is controlled in 1.1-1.5mg/L, ammonia nitrogen loading 0.029kgNH4+--N/KgVSS.d, pH value control
For system in 7.3-7.8, intermittent aerating can be used in 30~35 DEG C, offering oxygen way in temperature control.The concentration of free ammonia regulates and controls in matrix
Short distance nitration is advantageously implemented within the scope of 5~10mg/L, sludge (in terms of VSS) ammonia load is 0.02~1.67kg/ (kg
D), sludge age was at 1~2.5 day.
Water distributor：Ensure that Anammox stage of reaction water distribution is uniform, while controlling reactor upflow velocity 0.5m/h, prevents
Only strain is in bottom deposit.
Water distributor：Connect water distributor and bottom cloth water cap.
Cloth water cap：Fixed water distribution pipe, while playing the role of sewage injection, prevent water distribution pipe from blocking.
Composite filling：Ensure that ammoxidation strain biofilm is fixed, while improving strain concentration in reactor.
Reaction principle：It is under low DO condition with nitrite (NO in the back segment ammoxidation reaction stage2 -) it is electronics
Receptor, with NH4 +, by ammonia (NH4 +) it is converted to nitrogen (N2), simultaneous fixes CO by electron donor of nitrite2And it produces
Caliche hydrochlorate (NO3 -) bioprocess, wherein mineralized nitrogen process be anaerobic ammonia oxidizing bacteria using azanol as oxidant, ammonia nitrogen
It is oxidized to hydrazine, hydrazine is reoxidised into the process of nitrogen.
NH4 ++1.31NO2 -+0.066HCO3 -+0.13H+→N2+0.26NO3 -+0.066CH2O0.5N0.15+2H2O
Control parameter
PH value control is controlled in 6.7-8.3, temperature at 30 DEG C -43 DEG C, and ammoxidation reaction process is anaerobic reaction process, molten
Oxygen control is solved the 0.5% of saturation control hereinafter, ammonia oxidizing bacteria cell concentration is more than 1010~1050cellmL-1When,
When COD/N ＜ 2, it can ensure that anaerobic ammoxidation activity, COD concentration are less than 300mg.L-1。
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.
Claims (8)
1. a kind of high-efficiency biological denitrification reactor, it is characterised in that：Including first reactor and second reactor, first reactor
It is inside provided with aerator, the short-cut denitrification process for providing ammonia nitrogen waste water；
Setting is disposed with water distribution cap layers, composite filling layer, three phase separator and water distributor from the bottom up in second reactor,
Several connectors are evenly equipped on water distributor；
Water distribution cap layers are evenly distributed with several cloth water caps, and cloth water cap is arranged using point type；
Connector quantity on water distributor is identical as the quantity of cloth water cap of water distribution cap layers, and each between connector and a cloth water cap
It is connected with water distributor, water distributor is connected to the linkage section of cloth water cap；
It is attached with ammonia oxidizing bacteria on composite filling layer.
2. high-efficiency biological denitrification reactor according to claim 1, it is characterised in that：The maximum of the undergauge section of cloth water cap is straight
The ratio between diameter and minimum diameter are 2-3:1.
3. high-efficiency biological denitrification reactor according to claim 2, it is characterised in that：The outlet end of cloth water cap it is a diameter of
8-10mm。
4. high-efficiency biological denitrification reactor according to claim 3, it is characterised in that：Cloth water cap is in second reactor bottom
The density of distribution is 1-2/m2。
5. high-efficiency biological denitrification reactor according to claim 1, it is characterised in that：The bottom of the composite filling layer
The distance between second reactor bottom is 100cm.
6. high-efficiency biological denitrification reactor according to claim 1, it is characterised in that：The thickness of the composite filling layer is
2.0m。
7. high-efficiency biological denitrification reactor according to claim 1, it is characterised in that：The aerator is that can promote exposure
Device of air.
8. high-efficiency biological denitrification reactor according to claim 7, it is characterised in that：The aerator includes 3-5 sets
Membrane tube aeration device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721865001.8U CN207827966U (en) | 2017-12-27 | 2017-12-27 | A kind of high-efficiency biological denitrification reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107935183A (en) * | 2017-12-27 | 2018-04-20 | 山东太平洋环保股份有限公司 | A kind of high-efficiency biological denitrification reactor and process for treating high ammonia nitrogen waste water |
-
2017
- 2017-12-27 CN CN201721865001.8U patent/CN207827966U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107935183A (en) * | 2017-12-27 | 2018-04-20 | 山东太平洋环保股份有限公司 | A kind of high-efficiency biological denitrification reactor and process for treating high ammonia nitrogen waste water |
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