CN109354330B - Synchronous denitrification dephosphorization system of integral type - Google Patents
Synchronous denitrification dephosphorization system of integral type Download PDFInfo
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- CN109354330B CN109354330B CN201811503500.1A CN201811503500A CN109354330B CN 109354330 B CN109354330 B CN 109354330B CN 201811503500 A CN201811503500 A CN 201811503500A CN 109354330 B CN109354330 B CN 109354330B
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- 230000003647 oxidation Effects 0.000 claims abstract description 47
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 47
- 239000010865 sewage Substances 0.000 claims abstract description 37
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 24
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 22
- 239000011574 phosphorus Substances 0.000 claims abstract description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims description 51
- 238000004062 sedimentation Methods 0.000 claims description 41
- 238000007789 sealing Methods 0.000 claims description 31
- 239000010802 sludge Substances 0.000 claims description 25
- 238000003756 stirring Methods 0.000 claims description 21
- 230000007246 mechanism Effects 0.000 claims description 20
- 239000002101 nanobubble Substances 0.000 claims description 19
- 238000012545 processing Methods 0.000 claims description 12
- 238000007664 blowing Methods 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000000889 atomisation Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 230000001546 nitrifying effect Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 4
- 230000001737 promoting effect Effects 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims 5
- 238000001125 extrusion Methods 0.000 claims 1
- 238000012806 monitoring device Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 5
- 229910021645 metal ion Inorganic materials 0.000 abstract description 5
- 244000005700 microbiome Species 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 4
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- 238000004891 communication Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000002904 solvent Substances 0.000 description 12
- 239000007789 gas Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- WHBMMWSBFZVSSR-UHFFFAOYSA-N 3-hydroxybutyric acid Chemical compound CC(O)CC(O)=O WHBMMWSBFZVSSR-UHFFFAOYSA-N 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 6
- 239000011259 mixed solution Substances 0.000 description 6
- 238000010992 reflux Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000006213 oxygenation reaction Methods 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000005273 aeration Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 235000013619 trace mineral Nutrition 0.000 description 3
- 239000011573 trace mineral Substances 0.000 description 3
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 2
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 2
- 239000000370 acceptor Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000013557 residual solvent Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007954 hypoxia Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000033116 oxidation-reduction process Effects 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
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Classifications
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/002—Apparatus and plants for the biological treatment of water, waste water or sewage comprising an initial buffer container
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/26—Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/08—Nanoparticles or nanotubes
-
- 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
- C02F3/02—Aerobic processes
- C02F3/06—Aerobic processes using submerged filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses an integrated synchronous nitrogen and phosphorus removal system which is integrated in a container and has compact structure composition and small space occupation. And the flow path of the sewage in the system is prolonged by adopting a baffling communication mode, so that the substrate in the sewage is fully mixed and contacted with the microorganism. In order to ensure the quality of the discharged water, the system is also provided with a standby biological film reaction chamber, a water quality monitor is arranged in the clean water chamber and used for detecting indexes such as metal ions, pH values, microelements and the like in the treated water quality, and once the detected indexes are unqualified, a controller controls sewage to enter the biological film reaction chamber from the biological contact oxidation chamber for treatment and then enter a clean water tank for storage. The biomembrane reaction chamber is used selectively, so that the use frequency is reduced, the maintenance period is longer, and the maintenance cost is lower.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an integrated synchronous nitrogen and phosphorus removal system.
Background
Sewage treatment is widely applied to various fields such as construction, agriculture, traffic, energy, petrochemical, environmental protection, urban landscapes, medical treatment, catering and the like, and is increasingly carried into daily life of common people, and the sewage treatment is generally divided into production sewage treatment and domestic sewage treatment according to sewage source classification.
The domestic sewage is one of important sources of water pollution in China, the advanced treatment and recycling of the domestic sewage can reduce the potential secondary pollution and relieve the current situation of water resource shortage in China, and is an effective way for realizing circular economy and developing ecological civilization, so that continuous improvement is made on the process of the domestic sewage treatment for meeting the requirements of social development.
A 2/O-MBR-biological contact oxidation tank double-sludge high-efficiency denitrification dephosphorization device is disclosed in the Chinese patent No. 201510696581.1, wherein the A 2/O and the biological contact oxidation tank are connected through an MBR (membrane bioreactor), so that a good double-sludge system environment is ensured, the concentration of activated sludge in A 2/O is better ensured, and the sludge loss is avoided. The purchase and maintenance cost of the membrane bioreactor is higher, the sewage treatment cost is greatly increased, no precipitation and filtering measures are adopted after the effluent is subjected to biological contact oxidation treatment, the SS concentration of the effluent is higher, in addition, the higher sludge concentration is difficult to reach by the biological contact oxidation, the nitrification efficiency is low, the first aeration zone of the equipment is not beneficial to denitrification phosphorus accumulating bacteria culture, and the denitrification effect is poor when the sewage with low carbon-nitrogen ratio is treated.
Disclosure of Invention
The invention aims to solve the technical problem of providing an integrated synchronous nitrogen and phosphorus removal system which can meet the sewage treatment requirement and reduce the treatment cost.
In order to solve the technical problems, the invention adopts the following technical scheme:
an integrated synchronous nitrogen and phosphorus removal system, comprising:
The reaction box body is enclosed by a wall plate to form a closed chamber, the chamber is divided into a plurality of processing chambers which are sequentially communicated by upper and lower fold lines by a baffle plate, the processing chambers comprise an anaerobic chamber, an anoxic chamber, a biological selection chamber, a first sedimentation chamber, a biological contact oxidation chamber, a second sedimentation chamber and a clear water chamber which are sequentially arranged, and the first sedimentation chamber, the biological contact oxidation chamber and the second sedimentation chamber are respectively formed by two processing chambers, so that the water inlets and the water outlets of the first sedimentation chamber and the second sedimentation chamber are respectively arranged at the upper part;
Wherein,
The bottom of the first sedimentation chamber is externally connected with a sludge pond by virtue of a first sewage discharge pipe and is communicated with the anaerobic chamber by virtue of a sludge return pipe;
the biological contact oxidation chamber is internally provided with biological filler, the bottom of the biological contact oxidation chamber is provided with a micro-nano bubble generator, and the water outlet on the biological contact oxidation chamber comprises a first water outlet and a second water outlet which are selectively opened;
The bottom of the second sedimentation chamber is connected with the sludge pond by virtue of a second blow-off pipe, the second sedimentation chamber is communicated with a first water outlet of the biological contact oxidation chamber, a first sealing plate capable of covering and sealing the first water outlet is arranged on the first water outlet, and the first sealing plate is connected with a first driving part capable of driving the first sealing plate to open or close the first water outlet;
The clear water chamber is communicated with the anoxic chamber by means of a nitrifying liquid return pipe, and a water quality monitor is arranged in the inner cavity of the clear water chamber;
The treatment chamber further comprises a biological film reaction chamber, the biological film reaction chamber is communicated with a second water outlet of the biological contact oxidation chamber, a second sealing plate capable of covering and sealing the biological contact oxidation chamber is arranged on the second water outlet, the second sealing plate is connected with a second driving part capable of driving the second sealing plate to open or close the second water outlet, and the biological film reaction chamber is communicated with the clean water chamber by means of a delivery water pump;
the signal input end of the controller is connected with a water quality monitor, and the control output end of the controller is connected with a first driving part, a second driving part and a water producing pump.
A further technical proposal is that the anaerobic chamber and/or the anoxic chamber are composed of a plurality of treatment chambers.
The further technical scheme is that the bottom of the first settling chamber and/or the second settling chamber is provided with a mud guiding plate which is arranged in an up-down inclined manner, and the lower end of the mud guiding plate is arranged towards the sewage pipe connecting port.
The further technical scheme is that the mud guiding plate is movably arranged, a first supporting part and a second supporting part which are high and low and can stretch out and draw back are arranged at the bottom of the mud guiding plate at intervals, and the first supporting part and the second supporting part are connected with the control output end of the controller.
Further technical scheme is that micro-nano bubble generator is including the mixing chamber, broken chamber, buffer chamber and the atomizing chamber that communicate in proper order and set up, be equipped with a plurality of orifices on the lateral wall between broken chamber and the buffer chamber, the mixing chamber external connection has the mixing tube body, the mixing tube body has water inlet end and inlet end, be equipped with the bubble discharge port on the atomizing chamber.
The upper portion and the broken chamber intercommunication of mixing chamber, be equipped with the polylith mixing plate that level and upper and lower interval set up in the mixing chamber, have the water clearance between the lateral wall of two adjacent mixing plates relative one end and mixing chamber for form the mixed runner of baffling in the mixing chamber, have the cavity with mixing tube body intercommunication in one or more pieces of mixing plate that mixing chamber bottom set up, form and jet the chamber board, jet the chamber board and enclose by the ripple board and constitute, and cloth has a plurality of jet hole on jet the chamber board.
The stirring device is characterized in that a stirring shaft body is vertically arranged in the middle of the crushing cavity, one end of the stirring shaft body is connected with a driving motor for driving the stirring shaft body to rotate, crushing blades are arranged on the stirring shaft body, two crushing blades arranged on two sides of the stirring shaft body are arranged at equal heights, and the two crushing blades are respectively arranged in an upward and downward inclined mode.
The further technical scheme is that the crushing fan blade comprises a crushing net piece and a dividing piece, wherein the crushing net piece is positioned in a vertical plane, one end of the crushing net piece is fixed with the stirring shaft body, the mesh density of the crushing net piece is less than 20 holes per square centimeter, and the dividing piece is positioned in front of the rotation of the crushing net piece and is vertically fixed with the crushing net piece.
The further technical scheme is that a baffle is vertically arranged between the buffer cavity and the atomization cavity, a water passing gap for communicating the buffer cavity with the atomization cavity is formed in the bottom of the baffle, a notch is formed in the upper portion of the baffle, a support pore plate which is horizontally arranged is arranged on the lower portion of the buffer cavity, an air bag which is in a contracted state is arranged on the support pore plate, the air bag is externally connected with an inflation mechanism which is used for inflating the air bag to the air bag so as to extrude air bubbles in the buffer cavity to enter the atomization cavity from the notch, and the inflation mechanism is connected to the control output end of the controller.
The further technical scheme is that the air blowing mechanism for promoting outward discharge of air bubbles is arranged below the notch part in the atomization cavity, the air blowing mechanism is provided with an exhaust panel arranged in a downward inclined mode, an atomizer is arranged below the exhaust mechanism, an outlet of the atomizer is communicated with a space above the air blowing mechanism, the top wall of the atomization cavity is of a corrugated plate structure and is arranged in parallel with the exhaust panel, and the air bubble discharge outlet is arranged on the top wall of the atomization cavity.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in:
The system can separate the nitrification process from A 2/O in the sewage treatment process in which two sludge ages exist, so that the sewage can fully perform the nitrification reaction in the biological contact oxidation pond. A 2/O operates under the condition of short sludge age, does not require a nitrification function, and only performs dephosphorization and denitrification treatment; the biological contact oxidation pond operates under the condition of long mud age, which is more beneficial to the stability and high efficiency of the nitrification effect; the aerobic section (i.e. the biological selection chamber) of A 2/O is opened in the debugging stage to culture the phosphorus accumulating bacteria, and the section is in a closed state, i.e. an anoxic state, in the normal operation process to domesticate and culture the denitrification phosphorus accumulating bacteria; the nitrate nitrogen returned by the biological contact oxidation pond provides sufficient electron acceptors for the anoxic zone of A 2/O, provides a good environment for denitrification dephosphorization, realizes 'one-carbon dual-purpose' by the denitrification dephosphorization technology, has high denitrification dephosphorization efficiency of sewage, and is particularly suitable for sewage with low carbon nitrogen ratio.
The system can reduce the treatment cost on the premise of meeting the sewage treatment effect, and the sewage is subjected to mud-water separation treatment before entering the biological contact oxidation pond through the setting of the first sedimentation in the system, and the concentration of activated sludge in A 2/O is ensured through mud-water backflow, so that the reduction of the biochemical reaction rate caused by sludge loss is avoided.
In addition, in order to ensure the quality of the discharged water, the system is also provided with a standby biological film reaction chamber, a water quality monitor is arranged in the clean water chamber and used for detecting indexes such as metal ions, pH values, trace elements and the like in the treated water quality, and once the detected indexes are unqualified, a controller is not arranged, sewage is controlled to enter the biological film reaction chamber from the biological contact oxidation chamber for treatment and then enters a clean water tank for storage. The biomembrane reaction chamber is used selectively, so that the use frequency is reduced, the maintenance period is longer, and the maintenance cost is lower.
The biological contact oxidation chamber adopts a micro-nano bubble generator to perform aeration, and utilizes the synergistic effect of the ultra-dissolution and gas release technology and the nano dispersion technology to ensure that water and gas are mixed in a highly compatible manner, thereby achieving the effect of rapid oxygenation and improving the oxygenation efficiency.
The system is integrated in the integrated equipment, and has compact structure composition and small space occupation. And the flow path of the sewage in the system is prolonged by adopting a baffling communication mode, so that the substrate in the sewage is fully mixed and contacted with the microorganism.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of the reaction chamber according to the present invention (the top plate and the front side plate of the reaction chamber are not shown);
FIG. 3 is a schematic structural diagram of the micro-nano bubble generator according to the present invention;
FIG. 4 is a schematic diagram of the working principle of the present invention;
Fig. 5 is a schematic structural view of the mud guiding board according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1 to 4, an integrated synchronous nitrogen and phosphorus removal system includes a reaction tank and a controller 10. The reaction box body is enclosed by the wallboard and constitutes a confined cavity, and a plurality of processing chambers that go up in proper order, lower broken line intercommunication are separated into by the baffle in this cavity, processing chamber is including anaerobic room 1, anoxic room 2, biological selection room 3, first settling chamber 4, biological contact oxidation room 5, second settling chamber 6 and clear water room 7 that set gradually, and this system is concentrated in a container in whole, and the structure is constituteed closely, and the space occupies for a short time. The first sedimentation chamber 4, the biological contact oxidation chamber 5 and the second sedimentation chamber 6 are formed by two treatment chambers, so that the water inlets and the water outlets of the first sedimentation chamber and the second sedimentation chamber are all arranged at the upper part, the water inlet and outlet requirements of a sedimentation tank are met, and the anaerobic chamber 1, the anoxic chamber 2, the biological selection chamber 3, the first sedimentation chamber 4, the biological contact oxidation chamber 5, the second sedimentation chamber 6 and the clear water chamber 7 are communicated by upper and lower fold lines, so that the flow of sewage in the system is prolonged, and substrates in the sewage are fully mixed and contacted with microorganisms.
And the volume of a processing chamber with a water inlet port in the sedimentation chamber is smaller, so that a buffer effect is achieved, the impact force of water inlet is avoided to disturb sludge sedimentation, the volume of the other processing chamber is larger, the effect of main sedimentation is achieved, sewage in the main sedimentation chamber reversely seeps from bottom to top, and the impact force is small, so that sedimentation is facilitated.
The processing chambers are also connected by a pipe body. The bottom of the first settling chamber 4 is externally connected with a sludge pool 8 by a first blow-down pipe and is communicated with the anaerobic chamber 1 by a sludge return pipe. The bottom of the second sedimentation chamber 6 is connected with a sludge pool 8 by a second blow-down pipe, and the clear water chamber 7 is communicated with the anoxic chamber 2 by a nitrifying liquid return pipe.
The biological contact oxidation chamber 5 is internally provided with biological filler, and the bottom of the biological contact oxidation chamber is provided with a micro-nano bubble generator 51. The water and the air are mixed in high degree by the synergistic effect of the super-dissolution and air release technology and the nano-dispersion technology, so as to achieve the effect of rapid oxygenation.
To ensure the quality of the effluent, the system is also provided with a water quality monitor 71 and a spare biofilm reactor 9.
The water quality monitor 71 is arranged in the clean water chamber 7 and comprises a metal ion concentration sensor, a pH tester and a trace nonmetallic element detector which are all in signal connection with the controller 10, and is used for detecting indexes such as metal ions, pH values, trace elements and the like in the treated water quality. The biofilm reaction chamber 9 or the second sedimentation tank is selected for use according to the detection result of the water quality monitor 71.
The water outlet on the biological contact oxidation chamber 5 is thus located at the upper part, comprising a first water outlet 52 and a second water outlet 53 which are alternatively open. The second sedimentation chamber 6 is communicated with a first water outlet 52 of the biological contact oxidation chamber 5, a first sealing plate capable of covering and sealing the first water outlet 52 is arranged on the first water outlet 52, and a first driving part 54 capable of driving the first sealing plate to open or close the first water outlet 52 is connected to the first sealing plate. The biological film reaction chamber 9 is communicated with a second water outlet 53 of the biological contact oxidation chamber 5, a second sealing plate capable of covering and sealing the second water outlet 53 is arranged on the second water outlet 53, the second sealing plate is connected with a second driving part 55 capable of driving the second sealing plate to open or close the second water outlet 53, and the biological film reaction chamber 9 is communicated with the clean water chamber 7 by means of a water producing pump 91.
The first driving part and the second driving part can both adopt air cylinders, the air cylinders are utilized to drive the sealing plates to move up and down, concave-convex matched slideway structures can be adopted between the sealing plates and the corresponding baffle plates, so that stable up-down movement of the sealing plates is ensured, the sealing plates are attached to the water outlet and sealed, and sealing rubber strips can be arranged around the inner sides of the sealing plates to seal.
Based on the above configuration, the water quality monitor 71 is connected to the signal input end of the controller 10, and the first driving unit 54, the second driving unit 55, and the water producing pump 91 are connected to the control output end thereof. The controller 10 is a programmable logic controller based on a PLC. The micro-nano bubble generator 51 can be controlled by the controller 10 or manually by a worker.
The system is in the working process:
(1) The domestic sewage enters the anaerobic chamber 1 from the regulating tank through the water inlet pump, and the reflux sludge pumped back from the bottom of the first settling chamber 4 through the sludge reflux pump synchronously enters, the HRT Anaerobic system is controlled to be 2-3 hours, the denitrifying phosphorus accumulating bacteria in the anaerobic chamber 1 performs anaerobic phosphorus release reaction, and the energy generated in the process is utilized to absorb the soluble organic matters in the wastewater, so that the soluble organic matters are converted into poly beta-hydroxybutyric acid and stored in cells;
(2) The mixed solution enters an anoxic chamber 2 from an anaerobic chamber 1, simultaneously enters nitrifying solution from a biological contact oxidation chamber 5, controls HRT Hypoxia of oxygen to be 3-5 hours, and denitrifying phosphorus accumulating bacteria oxidize the poly beta-hydroxybutyric acid stored in cells by using nitrate generated by nitrifying in the contact oxidation chamber as an electron acceptor, and the energy generated by the process is utilized to complete the proliferation of the poly beta-hydroxybutyric acid, and simultaneously excessively absorb orthophosphate from sewage and store the orthophosphate in the form of phosphorus accumulating in the cells;
(3) The mixed solution enters an aerobic zone from an anoxic zone, and the HRT Aerobic conditions is controlled to be 0.5-1.5 h to perform an aerobic phosphorus absorption reaction;
(4) The mixed solution enters a first sedimentation chamber 4 from a biological selection chamber 3 to realize mud-water separation, supernatant liquid containing ammonia nitrogen flows back to a biological contact oxidation chamber 5 through a water pump, a certain amount of phosphorus-containing sludge is discharged from the bottom of the first sedimentation chamber 4 to achieve the purpose of removing phosphorus, and the rest of the sludge is pumped back to an anaerobic chamber 1, wherein the sludge reflux ratio is controlled at 75% -125%;
(5) The mixed solution enters the biological contact oxidation chamber 5 from the first precipitation chamber 4, and aeration equipment in the biological contact oxidation chamber 5 adopts a micro-nano bubble generator 51, and utilizes the synergistic effect of the super-dissolution and gas release technology and the nano dispersion technology to realize high-compatibility mixing of water and gas so as to achieve the effect of rapid oxygenation. Adding biological filler into the biological contact oxidation pond, wherein the specific surface area is 200m 2/m3～800m2/m3, the filling ratio is 30-45%, oxidizing ammonia nitrogen into nitrate nitrogen by nitrifying bacteria by controlling the hydraulic retention time of the biological contact oxidation area to be 4-6 h and the dissolved oxygen concentration to be 1.5-2.5 mg/L, and refluxing the effluent of the biological contact oxidation chamber 5 to the anoxic chamber 2 by a nitrifying liquid reflux pump, wherein the nitrifying liquid reflux ratio is controlled to be 150-350%;
(6) The mixed solution enters a second sedimentation chamber 6 from the biological contact oxidation chamber 5 for secondary sedimentation;
(7) The mixed solution enters a clean water tank for disinfection after being precipitated in a second precipitation area and is discharged from a water outlet of the clean water tank.
In the clean water tank, the water quality monitor 71 detects indexes such as metal ions, pH values, trace elements, and the like in water.
Once the detection index is unqualified, the water quality monitor 71 transmits the signal to the controller 10, the controller 10 controls the first driving part 54 to act, so that the first sealing plate closes the first water outlet 52, blocks the communication between the biological contact oxidation chamber 5 and the second sedimentation chamber 6, and simultaneously controls the second driving part 55 to act, the second sealing plate opens the second water outlet 53, communicates the biological contact oxidation chamber 5 and the biological film reaction chamber 9, sewage is processed by the biological contact oxidation chamber 5, the step (6) is omitted, the sewage enters the biological film reaction chamber 9 for processing, after a period of time, the controller 10 controls the water producing pump 91 to work, and mixed liquid in the biological film reaction chamber 9 enters the clean water tank for disinfection and then is discharged from a water outlet of the clean water tank.
And (4) when the detection index is qualified, the biological film reaction chamber 9 is not used, and the steps (1) - (7) are repeated.
The anaerobic chamber 1 and/or the anoxic chamber 2 is formed by a plurality of treatment chambers, and the anaerobic and anoxic areas are enabled to have the longest flow under the same effective volume in the same way by adopting an up-down baffling mode, and the substrate in the sewage is fully mixed and contacted with the microorganism under the action of water flow. The anaerobic zone and the anoxic zone are provided with oxidation-reduction potential (ORP, pH and dissolved oxygen DO) on-line monitoring instruments for monitoring the microorganism growth environment.
As shown in fig. 5, the bottom of the first settling chamber 4 and/or the second settling chamber 6 is provided with a mud guiding plate 41 which is arranged in an up-down inclined manner, and the lower end of the mud guiding plate 41 is arranged towards the connecting port of the sewage drain, so that the sludge is discharged from the sewage drain. The first support portion 42 and the second support portion 43, which are respectively arranged at the bottom of the mud guiding plate 41 at intervals and can be telescopic, are movably arranged on the mud guiding plate 41, the support portions can be oil cylinders, jacks and other devices, and the first support portion 42 and the second support portion 43 are respectively connected with a control output end of the controller 10. Under normal conditions, when mud is discharged outwards, the controller 10 controls the two support parts to stretch alternately, and the two support parts always keep a low-high setting, so that the two ends of the mud guide plate 41 move up and down back and forth, and mud on the mud guide plate 41 is loose and is easy to discharge.
The micro-nano bubble generator 51 comprises a mixing cavity 520, a crushing cavity 530, a buffer cavity 540 and an atomization cavity 550 which are sequentially communicated, wherein a plurality of orifices 534 are arranged on the side wall between the crushing cavity 530 and the buffer cavity 540, the orifices 534 can be taper holes with small ends facing the buffer cavity 540, a mixing pipe body 523 is connected outside the mixing cavity 520, the mixing pipe body 523 is provided with a water inlet end and an air inlet end, and a bubble discharge port is arranged on the atomization cavity 550. Water and gas sequentially enter the mixing chamber 520, the crushing chamber 530, the buffer chamber 540, and the atomizing chamber 550 from the mixing pipe body 523 and then are discharged.
Solvent (usually water) enters the mixing cavity 520 through the mixing pipe body 523, meanwhile, gas (usually air) also enters the mixing cavity 520 through the mixing pipe body 523, the mixing cavity 520 can be mixed in a stirring mode, then the solvent enters the crushing cavity 530, bubbles in the solvent are further crushed rapidly, a certain pressure exists in the crushing cavity 530, after the solvent enters the buffer cavity 540, the pressure is reduced, the bubbles are separated out, after the solvent enters the atomizing cavity 550, the residual solvent is atomized into micro-nano bubbles, and the micro-nano bubbles are discharged together with the separated micro-nano bubbles through the bubble discharge port.
The upper part of the mixing cavity 520 is communicated with the crushing cavity 530, and the mixing cavity 520 mainly adopts a baffling mode, so that the contact time and flow of water and gas are prolonged, and the water and the gas are uniformly mixed. Specifically, a plurality of mixing plates 521 are horizontally arranged in the mixing chamber 520 and are arranged at intervals up and down, a water passing gap is formed between one end of each two adjacent mixing plates 521 opposite to the side wall of the mixing chamber 520, so that a baffled mixing runner is formed in the mixing chamber 520, one or more mixing plates 521 arranged at the bottom of the mixing chamber 520 are provided with cavities communicated with the mixing pipe body 523, an injection cavity plate 522 is formed, the injection cavity plate 522 is formed by encircling a corrugated plate, a plurality of injection holes are distributed on the injection cavity plate 522, the injection directions of the injection holes face to each direction by utilizing the shape characteristics of the corrugated plate, and the condition that the injection directions meet exists, so that the uniformity of water and gas mixing is improved.
The middle part in the crushing cavity 530 is vertically provided with a stirring shaft body 531, one end of the stirring shaft body 531 is connected with a driving motor 532 for driving the stirring shaft body 531 to rotate, the stirring shaft body 531 is provided with crushing blades 533, the two crushing blades 533 arranged on two sides of the stirring shaft body 531 are arranged at equal heights, namely, the highest point and the lowest point of the two crushing blades 533 are the same, and the two crushing blades 533 are respectively arranged in an upward and downward inclined manner. The resistance that crushing fan blade 533 that the slope set up received in rotatory in-process is less, and in this structure, two crushing fan blades 533 of same altitude form a cone and a reverse cone respectively when rotatory, have guaranteed that the solution in crushing chamber 530 and the comprehensive contact of crushing fan blade 533 are broken. In use, the driving motor 532 drives the stirring shaft 531 to rotate at a high speed, and the crushing fan blades 533 cut the large bubbles into small bubbles, so that the gas in the crushing cavity 530 is beneficial to the rapid release of the high-pressure solvent when entering the buffer cavity 540 through the orifice 534 during the high-speed rotation, and the air in the solvent is converted into the small bubbles to be released.
The crushing fan blade 533 comprises a crushing net piece 5331 and a dividing piece 5332, wherein the crushing net piece 5331 is positioned in a vertical plane, one end of the crushing net piece 5331 is fixed with the stirring shaft body 531, the mesh density of the crushing net piece 5331 is less than 20 holes per square centimeter, and meshes are arranged on the surface of the crushing net piece 5331 when the crushing net piece 5331 rotates at a high speed, so that bubbles in a solvent can be further crushed rapidly, large bubbles are cut into small bubbles, and the generation and the formation of micro-nano bubbles are facilitated. The dividing piece 5332 is located in front of and vertically fixed to the rotation of the broken net 5331, and the broken fan blades 533 rotate to divide the solution in front of the broken net 5331, so that the resistance of the rotation of the broken net 5331 is reduced, and an effective contact surface between the broken net 5331 and the solution can be ensured.
A partition plate is vertically arranged between the buffer cavity 540 and the atomizing cavity 550, a water passing gap for communicating the buffer cavity 540 with the atomizing cavity 550 is arranged at the bottom of the partition plate, a notch 541 is arranged at the upper part of the partition plate, a support orifice plate 542 horizontally arranged is arranged at the lower part of the buffer cavity 540, an air bag 543 in a contracted state is arranged on the support orifice plate 542, the air bag 543 is externally connected with an air charging mechanism 544 for charging air into the air bag 543 to expand the air bag so as to extrude air bubbles in the buffer cavity 540 to enter the atomizing cavity 550 from the notch 541, and the air charging mechanism 544 is connected to the control output end of the controller 10. When the solvent flowing in a rotating way passes through the throttle hole 534, the solvent is thrown into the buffer cavity 540 under the action of centrifugal force, the instant pressure of the solvent rotating at a high speed is released, so that the air in the solvent is quickly separated out to form micro-nano bubbles, after a period of time, the controller 10 controls the air bag 543 to expand, the air bag 543 presses the space in the buffer cavity 540, the separated micro-nano bubbles enter the atomizing cavity 550 from the notch 541 on the partition plate, part of liquid enters the atomizing cavity 550 from the water passing gap at the bottom to be atomized, the residual solvent is atomized to form micro-nano bubbles, and the micro-nano bubbles are discharged together with the separated micro-nano bubbles through the bubble discharge port. In this structure, the state of inflation-deflation of the bladder 543 is changed by intermittently controlling the air charging mechanism 544 by the controller 10, that is, the bladder 543 is inflated without a certain time interval to discharge air bubbles from the buffer chamber 540 once.
In order to enhance the air bubble discharge efficiency, an air blowing mechanism 551 is further disposed in the atomizing cavity 550, which is beneficial to accelerating the discharge of micro-nano air bubbles. The air blowing mechanism 551 for promoting the outward discharge of air bubbles is arranged below the notch 541 in the atomizing cavity 550, the air blowing mechanism 551 is provided with an exhaust panel arranged in a downward inclined manner, the atomizer 552 is arranged below the air blowing mechanism, the outlet of the atomizer 552 is communicated with the space above the air blowing mechanism 551, the exhaust panel can receive micro-nano air bubbles entering from the notch 541 and is led into the atomizing cavity 550, the exhaust direction of the exhaust panel is inclined to be intersected with the rising direction of the micro-nano air bubbles discharged by the atomizer 552 compared with the horizontal arrangement, and therefore the micro-nano air bubbles discharged by the atomizer 552 can be blown out together. The top wall of the atomizing chamber 550 is in a corrugated plate structure and is arranged parallel to the exhaust panel, and the bubble discharge outlet is arranged on the top wall of the atomizing chamber 550. The shape characteristics of the corrugated plate are also utilized, so that the discharge direction of the bubble discharge port faces to all directions, the bubble discharge port can be uniformly contacted and adsorbed with the mixed liquid in the biological contact oxidation chamber 5, and the diameter of the bubble discharge port is 1cm.
The foregoing is only a preferred embodiment of the present invention, and any and all simple modifications, variations and equivalents of the present invention will fall within the scope of the present invention.
Claims (7)
1. An integrated synchronous nitrogen and phosphorus removal system, comprising:
The reaction box body is enclosed by a wall plate to form a closed cavity, the cavity is divided into a plurality of processing cavities which are sequentially communicated by upper and lower fold lines by a baffle plate, the processing cavities comprise an anaerobic cavity (1), an anoxic cavity (2), a biological selection cavity (3), a first sedimentation cavity (4), a biological contact oxidation cavity (5), a second sedimentation cavity (6) and a clear water cavity (7) which are sequentially arranged, and the first sedimentation cavity (4), the biological contact oxidation cavity (5) and the second sedimentation cavity (6) are respectively formed by two processing cavities, so that water inlets and water outlets of the first sedimentation cavity and the second sedimentation cavity are respectively arranged at the upper part;
Wherein,
The bottom of the first sedimentation chamber (4) is externally connected with a sludge pool (8) by means of a first blow-down pipe and is communicated with the anaerobic chamber (1) by means of a sludge return pipe;
the biological contact oxidation chamber (5) is internally provided with biological filler, the bottom of the biological contact oxidation chamber is provided with a micro-nano bubble generator (51), and a water outlet on the biological contact oxidation chamber (5) comprises a first water outlet (52) and a second water outlet (53) which are alternatively opened;
The bottom of the second sedimentation chamber (6) is connected with the sludge pond (8) by means of a second blow-off pipe, the second sedimentation chamber (6) is communicated with a first water outlet (52) of the biological contact oxidation chamber (5), a first sealing plate which can cover and seal the first water outlet (52) is arranged on the first water outlet (52), and a first driving part (54) which can drive the first sealing plate to open or close the first water outlet (52) is connected with the first sealing plate;
The clean water chamber (7) is communicated with the anoxic chamber (2) by means of a nitrifying liquid return pipe, and a water quality monitor (71) is arranged in the inner cavity of the clean water chamber;
The treatment chamber further comprises a biological film reaction chamber (9), the biological film reaction chamber (9) is communicated with a second water outlet (53) of the biological contact oxidation chamber (5), a second sealing plate capable of covering and sealing the second water outlet (53) is arranged on the second water outlet, the second sealing plate is connected with a second driving part (55) capable of driving the second sealing plate to open or close the second water outlet (53), and the biological film reaction chamber (9) is communicated with the clean water chamber (7) by means of a water producing pump (91);
The water quality monitoring device comprises a controller (10), wherein the signal input end of the controller (10) is connected with a water quality monitor (71), and the control output end of the controller is connected with a first driving part (54), a second driving part (55) and a water producing pump (91);
The micro-nano bubble generator (51) comprises a mixing cavity (520), a crushing cavity (530), a buffer cavity (540) and an atomization cavity (550) which are sequentially communicated, wherein a plurality of orifices (534) are formed in the side wall between the crushing cavity (530) and the buffer cavity (540), a mixing pipe body (523) is connected to the outside of the mixing cavity (520), the mixing pipe body (523) is provided with a water inlet end and an air inlet end, and a bubble discharge port is formed in the atomization cavity (550); wherein the method comprises the steps of
The middle part in the crushing cavity (530) is vertically provided with a stirring shaft body (531), one end of the stirring shaft body (531) is connected with a driving motor (532) for driving the stirring shaft body (531) to rotate, the stirring shaft body (531) is provided with crushing blades (533), two crushing blades (533) arranged on two sides of the stirring shaft body (531) are arranged at equal heights, and the two crushing blades (533) are respectively arranged in an upward and downward inclined mode;
The utility model discloses a bubble atomizing device, including buffering chamber (540) and atomizing chamber (550), buffering chamber (540) and atomizing chamber (550) are connected, are equipped with the baffle between vertical being equipped with between buffering chamber (540) and the atomizing chamber (550), are equipped with notch (541) in baffle upper portion, the lower part of buffering chamber (540) is equipped with a supporting orifice (542) that the level set up, be equipped with an gasbag (543) that is in the shrink state on supporting orifice (542), gasbag (543) external have be used for inflating messenger's gasbag (543) to its inside inflation, with the bubble of extrusion buffering chamber (540) inside get into inflating mechanism (544) in atomizing chamber (550) by notch (541), inflating mechanism (544) are connected in the control output of controller (10).
2. An integrated synchronous nitrogen and phosphorus removal system according to claim 1, wherein the anaerobic chamber (1) and/or anoxic chamber (2) is formed by a plurality of process chambers.
3. The integrated synchronous nitrogen and phosphorus removal system according to claim 1, wherein a mud guiding plate (41) which is arranged in an up-down inclined manner is arranged at the bottom of the first sedimentation chamber (4) and/or the second sedimentation chamber (6), and the lower end of the mud guiding plate (41) is arranged towards a sewage pipe connecting port.
4. The integrated synchronous nitrogen and phosphorus removal system according to claim 3, wherein the mud guiding plate (41) is movably arranged, a first supporting part (42) and a second supporting part (43) which are high and low and can be telescopic are arranged at the bottom of the mud guiding plate (41) at intervals, and the first supporting part (42) and the second supporting part (43) are connected with the control output end of the controller (10).
5. The integrated synchronous nitrogen and phosphorus removal system according to claim 1, wherein the upper portion of the mixing chamber (520) is communicated with the crushing chamber (530), a plurality of mixing plates (521) are horizontally arranged in the mixing chamber (520) and are arranged at intervals up and down, a water gap is formed between one opposite end of each two adjacent mixing plates (521) and the side wall of the mixing chamber (520), a baffled mixing flow channel is formed in the mixing chamber (520), one or more mixing plates (521) arranged at the bottom of the mixing chamber (520) are provided with a cavity communicated with the mixing pipe body (523), an injection cavity plate (522) is formed, the injection cavity plate (522) is formed by encircling a corrugated plate, and a plurality of injection holes are distributed on the injection cavity plate (522).
6. The integrated synchronous nitrogen and phosphorus removal system according to claim 1, wherein the crushing blades (533) comprise a crushing mesh (5331) and a dividing piece (5332), the crushing mesh (5331) is located in a vertical plane, one end of the crushing mesh is fixed with the stirring shaft body (531), the mesh density of the crushing mesh (5331) is less than 20 holes per square centimeter, and the dividing piece (5332) is located in front of and vertically fixed with the rotation of the crushing mesh (5331).
7. The integrated synchronous nitrogen and phosphorus removal system according to claim 1, wherein an air blowing mechanism (551) for promoting air bubbles to be discharged outwards is arranged below the notch (541) in the atomizing cavity (550), the air blowing mechanism (551) is provided with an exhaust panel arranged in a downward inclined mode, an atomizer (552) is arranged below the exhaust mechanism, an outlet of the atomizer (552) is communicated with a space above the air blowing mechanism (551), the top wall of the atomizing cavity (550) is of a corrugated plate structure and is arranged in parallel with the exhaust panel, and the air bubble discharge outlet is arranged on the top wall of the atomizing cavity (550).
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