CN106630372A - Urban sewage denitrification treatment system and method - Google Patents
Urban sewage denitrification treatment system and method Download PDFInfo
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- CN106630372A CN106630372A CN201510738803.1A CN201510738803A CN106630372A CN 106630372 A CN106630372 A CN 106630372A CN 201510738803 A CN201510738803 A CN 201510738803A CN 106630372 A CN106630372 A CN 106630372A
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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
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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
- C02F11/00—Treatment of sludge; Devices therefor
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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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
- 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
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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
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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Abstract
The invention discloses an urban sewage denitrification treatment system and method. The system comprises a pretreater, a biological reaction tank and a sludge concentration tank which are connected sequentially, and further comprises a hydrodynamic cavitation sludge reducer, wherein an inlet end and an outlet end of the hydrodynamic cavitation sludge reducer are connected with an outlet end of the sludge concentration tank and an inlet end of the biological reaction tank respectively to form a sewage denitrification cycling system; the hydrodynamic cavitation sludge reducer comprises at least two stages of cavitation devices which are connected in series; the first-stage cavitation device comprises a first cavitator arranged in a first-stage cavitation cavity and a crushing baffle right facing an outlet of the first cavitator; a second-stage cavitation device comprises a second cavitator, a jet flow constraint object and a second-stage diffusion pipe which are connected sequentially, the jet flow constraint object is located in a gas dissolving cavity, and the gas dissolving cavity is provided with a gas dissolving adjustment mechanism; the biological reaction tank is configured to keep the concentration of dissolved oxygen at 2.0 mg/L or above, the pH value ranging from 7.0 to 8.0 and the temperature ranging from 15 DEG C to 30 DEG C during a nitration reaction.
Description
Technical field
The present invention relates to municipal sewage denitrogenation processing system and method, more particularly to a kind of processing system and method for subtracting mud machine raising municipal sewage denitrification effect using Hydrodynamic cavitation in biochemical processing process.
Background technology
At present many sewage treatment plants of China require upgrading.I.e. from original《Urban wastewater treatment firm pollutant emission standard》（GB18918-2002）One-level B standard is upgraded to one-level A standard.This transformation process is except paying high improvement expenses（Some factories even more than found the factory and spend use）Outward, another difficulty for facing is to be difficult to solution biological treatment technology to reach《Urban wastewater treatment firm pollutant emission standard》（GB18918-2002）In the standard denitrogenation of one-level A needed for the not enough problem of carbon source.It is generally acknowledged that to ensure Nitrogen removal effect, the C/N into the sewage of anoxic section should be controlled and at least should be greater than 2.86.Result of study shows:When water inlet C/N≤2.86, water outlet TN is extremely difficult to desired Effluent criteria.But C/N≤2.86 in China's most cities sewage, far from meeting requirement of the biological denitrificaion to carbon source.Particularly China's urban wastewater treatment firm water quality discharge one-level A standard gauge make TN in water concentration≤15mg/L. this require that the deficiency of bio-denitrification technology must be made up using additive method.
In order to solve this problem, although proposing many new technologies, such as improvement A2/ O techniques, inversion A2/ O techniques etc., but also it is not enough to solve up to standard to need carbon resource shortage problem.Have no alternative but some sewage treatment plants and employ the benefit carbon mode of additional carbon, but as a result cause cost of sewage disposal substantially to increase, and also add sludge factory yield, new environmental pollution and after-treatment cost are result in again.
The content of the invention
It is an object of the present invention to provide a kind of denitrification effect that can effectively improve municipal sewage plant's biochemical treatment system, and the discharge capacity of sludge can be reduced. while saving the municipal sewage denitrogenation processing system and method for the cost of additional carbon.
To achieve these goals, the invention provides a kind of municipal sewage denitrogenation processing system, including the pretreatment, biological reaction pool, the sludge concentration tank that are sequentially connected, it is characterised in that：
Also subtract mud machine including a Hydrodynamic cavitation, the Hydrodynamic cavitation subtracts the arrival end and the port of export of mud machine and connects the arrival end of the sludge concentration tank port of export and biological reaction pool respectively to form a sewage water denitrification circulatory system；
The Hydrodynamic cavitation subtracts at least two-stage cavitation apparatus that mud machine includes mutually being serially connected；
First order cavitation apparatus include the first cavitation device being placed in one-level cavitation chamber and just to the crushing baffle plate of first cavitation device outlet；
Second level cavitation apparatus include the second cavitation device, jet obligatory point and the two grades of anemostats being linked in sequence, and the jet obligatory point is located in molten air cavity, and the molten air cavity is provided with molten gas governor motion；
The biological reaction pool is configured to keep the concentration of dissolved oxygen in more than 2.0mg/L during nitration reaction, and 7.0～8.0, temperature range is 15～30 DEG C to pH value.
The Hydrodynamic cavitation subtracts mud machine also includes third level cavitation apparatus and fourth stage cavitation apparatus；The second level cavitation apparatus, third level cavitation apparatus and fourth stage cavitation apparatus are vertically configured from top to bottom；The first order cavitation apparatus are horizontally disposed and positioned at the top of the second level cavitation apparatus；
The first order cavitation apparatus are connected by the first support shrouding with the second level cavitation apparatus；The second level cavitation apparatus are connected by the second support shrouding with the third level cavitation apparatus；The third level cavitation apparatus are connected by the 3rd support shrouding with the fourth stage cavitation apparatus.
The pretreatment includes grid and the setting pot being sequentially connected.
The biological reaction pool includes anaerobic pond, anoxic pond and the Aerobic Pond being sequentially connected, and the arrival end of the one outlet end Jing pipeline connections anoxic pond of the Aerobic Pond constitutes the closed circuit for including the anoxic pond and Aerobic Pond；Another port of export of the Aerobic Pond is sequentially connected second pond and the sludge concentration tank, and the second pond is provided with the delivery port of sewage after processing；The Aerobic Pond is configured to keep the concentration of dissolved oxygen in more than 2.0mg/L, and 7.0～8.0, temperature range is 15～30 DEG C to pH value；The anoxic pond is configured to temperature range for 15～30 DEG C.
The biological reaction pool includes anaerobic pond and the oxidation ditch being sequentially connected, and the oxidation ditch includes anoxic section and aerobic section；The port of export of the oxidation ditch is sequentially connected second pond and sludge concentration tank, and the second pond is provided with the delivery port of sewage after processing；The aerobic section is configured to keep the concentration of dissolved oxygen in more than 2.0mg/L, and 7.0～8.0, temperature range is 15～30 DEG C to pH value；The anoxic section is configured to temperature range for 15～30 DEG C.
The biological reaction pool includes anaerobic pond and the sbr reactor pond being sequentially connected, and the sbr reactor pond port of export connects the sludge concentration tank.
The invention also discloses a kind of municipal sewage denitrifying method, it is characterised in that comprise the following steps：
Step A：Organic sewage is pre-processed, the suspension in organic sewage is removed；
Step B：By the bioremediation of biological reaction pool, using the metabolism of microorganism, nitrogen, the phosphorus organic pollution materials in pretreated organic sewage are removed, and concentration is carried out to the effluent after biological treatment by sludge concentration tank, reduce the water content of sludge in effluent；
Step C：Mud mixed liquid Jing after the process of step B subtract into Hydrodynamic cavitation produce after the first cavitation device of mud machine high-speed jet impinge upon with first cavitation device just to crushing baffle plate on, the bulky grain sludge flco in mud mixed liquid is crushed, is caused Hydrodynamic cavitation to subtract the mixed liquor pressure in the one-level cavitation chamber of mud machine and is further increased；Mud mixed liquid Jing after one-level cavitation subtracts the cavitation device of mud machine second into Hydrodynamic cavitation, molten air cavity in the cavitation apparatus of the second level and molten gas cavitation is produced under the collective effect of jet obligatory point；Mud mixed liquid after two grades of cavitations is discharged by two grades of anemostats；
Step D：Muddy water mixed solution Jing after the process of step C is returned in biological reaction pool as supplementary carbon source, promotes nitrate nitrogen to be more converted into nitrogen effusion, and then improves denitrification effect.
The method step C also includes：The 4th cavitation device carries out three-level and level Four cavitation process in pending mixed liquor containing sludge sequentially enters in the third level cavitation apparatus in downstream the 3rd cavitation device and fourth stage cavitation apparatus after the two-stage cavitation process of first order cavitation apparatus and second level cavitation apparatus described in, most after Jing outlet pipes discharge.
Step B is specially：
B0：Pretreated organic sewage mixture and the muddy water mixed solution containing high carbon source generated Jing after Hydrodynamic cavitation subtracts the effect of mud machine are entered in the anaerobic pond, the organic sewage mixture release phosphorus in the anaerobic pond, while partial organic substances are carried out with formation ammoniacal nitrogen after ammoniated treatment entering in the anoxic pond；
B1：The pretreated sewage mixed liquor of anaerobic pond described in Jing and the sewage mixed liquor from Aerobic Pond backflow are entered in the anoxic pond, the nitrate nitrogen that nitration reaction generation is carried out in Aerobic Pond is entered after anoxic pond, under anoxic conditions, nitrite nitrogen, nitrate nitrogen are reduced into gaseous nitrogen by denitrifying bacterium to remove from water, and then realize denitrogenation processing；
B2：The Aerobic Pond is configured to keep the concentration of dissolved oxygen in more than 2.0mg/L, and 7.0～8.0, temperature range is 15～30 DEG C to pH value；Into the ammoniacal nitrogen in the sewage mixture of Aerobic Pond under aerobic condition, first ammoniacal nitrogen is converted into nitrite by nitrococcus, then by nitrifier by Nitrite transformation be nitrate；Part of contaminated water mixed-liquor return after Aerobic Pond process carries out nitrification denitrogenation into the anoxic pond.
Step B is specially：
Pretreated organic sewage mixture and the muddy water mixed solution containing high carbon source generated Jing after Hydrodynamic cavitation subtracts the effect of mud machine are entered in the anaerobic pond, the organic sewage release phosphorus in the anaerobic pond, while partial organic substances are carried out with formation ammoniacal nitrogen after ammoniated treatment entering in the oxidation ditch；Ammoniacal nitrogen is converted into nitrite by organic sewage in the aerobic section of the oxidation ditch, first by nitrococcus, by Nitrite transformation is then nitrate by nitrifier；The sewage mixture of Jing nitrifications is entered in the anoxic section of the oxidation ditch, under anoxic conditions, nitrite nitrogen, nitrate nitrogen is reduced into gaseous nitrogen by denitrifying bacterium and is removed from water, and then realizes denitrogenation processing.
Or step B is specially：Pretreated organic sewage mixture and the muddy water mixed solution containing high carbon source generated Jing after Hydrodynamic cavitation subtracts the effect of mud machine are entered in the anaerobic pond, the organic sewage release phosphorus in the anaerobic pond, simultaneously partial organic substances are carried out with formation ammoniacal nitrogen after ammoniated treatment to enter in sbr reactor pond, first ammoniacal nitrogen is converted into nitrite by nitrococcus in sbr reactor pond, by Nitrite transformation is then nitrate by nitrifier；The sewage mixture of Jing nitrifications, under anoxic conditions, is reduced into gaseous nitrogen and removes from water by denitrifying bacterium by nitrite nitrogen, nitrate nitrogen, and then realizes denitrogenation processing.
The present invention is compared with prior art, mud machine is subtracted by Hydrodynamic cavitation, the excess sludge produced in biological treatment process is oxidized to the low molecule organic matter that can be utilized by microorganism, and flow into these low molecule organic matters as biological denitrificaion carbon source here in biological treatment, so as to improve the denitrification effect of urban sewage treatment system.The present invention not only can improve the denitrification effect of municipal sewage plant's biochemical treatment system, and can reduce the discharge capacity of sludge. while saving the cost of additional carbon.
Description of the drawings
Fig. 1 is the structural representation that the Hydrodynamic cavitation that the present invention is adopted subtracts mud machine；
Fig. 2 is that present system adopts A2The process chart of/O biochemical processing process；
Fig. 3 is process chart of the present system using oxidation ditch biochemical processing process；
Fig. 4 is process chart of the present system using SBR biochemical processing process；
Fig. 5 is the flow chart of the inventive method；
Fig. 6 is 1-7 month TN Inlet and outlet water change curves in 2015；
The Tu7Shi salt pans factory TN of in June, 2015 Inlet and outlet water change curve.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, the present invention is described in further detail.It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.
Municipal sewage denitrogenation processing system of the present invention, including the pretreatment, biological reaction pool and sludge concentration tank that are sequentially connected.The pretreatment includes grid and the setting pot being sequentially connected.Concatenate a Hydrodynamic cavitation between the sludge concentration tank port of export and the arrival end of biological reaction pool to subtract mud machine to form a sewage water denitrification circulatory system, Hydrodynamic cavitation subtracts the port of export that the arrival end of mud machine connects sludge concentration tank, and Hydrodynamic cavitation subtracts the arrival end that the port of export of mud machine connects by the road biological reaction pool.The biological reaction pool is configured to keep the concentration of dissolved oxygen in more than 2.0mg/L during nitration reaction, and 7.0～8.0, temperature range is 15～30 DEG C to pH value.
As described in Figure 1, Hydrodynamic cavitation of the present invention subtracts at least two-stage cavitation apparatus that mud machine includes mutually being serially connected；First order cavitation apparatus 100 include the first cavitation device 103 being placed in one-level cavitation chamber 101 and just to the crushing baffle plate 102 of first cavitation device 103 outlet；Second level cavitation apparatus 20 include the second cavitation device 21, jet obligatory point 25 and the two grades of anemostats 26 being linked in sequence, and the jet obligatory point 25 is located in molten air cavity 23, and the molten air cavity 23 is provided with molten gas governor motion.
As shown in figure 1, the first order cavitation apparatus 100 include one-level cavitation chamber 101, the first cavitation device 103 being placed in one-level cavitation chamber 101, and it is arranged in one-level cavitation chamber 101 and just to the crushing baffle plate 102 of the outlet of the first cavitation device 103.First cavitation device 103 is specially the first shrink nozzle, first shrink nozzle is horizontally arranged on the housing of the first order cavitation apparatus 100, and its port of export is stretched into the one-level cavitation chamber 101 surrounded by the housing of first order cavitation apparatus 100 and the first support shrouding 104.The baffle plate 102 of crushing vertically is fixed on the described first rear side for supporting shrouding 104.Preferably, the crushing baffle plate 102 is that arc crushes baffle plate, and the jet angle that arc crushing baffle plate is exported with first shrink nozzle is adapted to.High-speed jet is produced after the mixed liquor containing sludge enters the first cavitation device 103 and crushing baffle plate 102 is clashed into, baffle plate 102 is crushed by clashing into, the sludge flco in mixture is set first to be destroyed, it is easy to follow-up cavitation fully to be acted on sludge cell, to improve broken wall efficiency of the cavitation to sludge cell, enhanced primary cavitation effect.
Second cavitation device 21 is the second shrink nozzle for arranging straight down, in order to strengthen cavitation efficiency, it is preferable that second cavitation device 21 can be arranged in heating chamber 22.The second shrink nozzle outside wall surface, first support shrouding 104, the shell of second level cavitation apparatus 20 and heating chamber 22 described in the bag urogenesis of the first gripper shoe 223, the wall of the heating chamber 22 to be provided with heating collar 221.Preferably, the heating collar 221 is stainless steel mica heating collar.Requirement of the local water temperature operating mode to cavitation device can be met by heating collar 221 and then strengthen cavitation efficiency.The wall of the heating chamber 22 is provided with thermal insulation board 222.The heating chamber 22 is optional apparatus, and cavitation effect can be also realized when heating chamber 22 is not provided with, but is to increase the efficiency that cavitation can be improved after heating chamber 22.It is additionally provided with the second gripper shoe 24 between two grades of anemostats 26 and the shell of second level cavitation apparatus 20, first gripper shoe 223 and second gripper shoe 24 and is connected the perpendicular wall of two gripper shoes and surrounds to form the molten air cavity 23.The molten gas governor motion is used to meet the molten gas cavitation of jet in second level cavitation apparatus 20 for the requirement of air inflow, the air inlet pipe 273 connected with the molten air cavity 23 is specifically included, mass air flow sensor 272 in the air inlet pipe 273 and the Air-regulating valves 271 of the porch of air inlet pipe 273 is arranged on.The outlet of second cavitation device 20 is stretched into the molten air cavity 23, and the exit of second cavitation device 20 is additionally provided with jet obligatory point 25, for making jet smooth and producing convolution cavitation.The vertical tangent plane of the jet obligatory point 25 is substantially in " V " type.The jet obligatory point 25 is exported and docked with the entrance of two grades of anemostats 26.
Pending mixed liquor containing sludge forms high-speed jet into after first cavitation device 103 and impinges upon on the crushing baffle plate 102, crush the bulky grain sludge flco in mixed liquor, subsequently into second cavitation device 21, mixed liquor produces molten gas cavitation in second cavitation device 21, and the mixed liquor of two grades of cavitations again discharge by two grades of anemostats 26 described in Jing.
The Hydrodynamic cavitation that the present invention is adopted subtracts mud machine also includes third level cavitation apparatus 30 and fourth stage cavitation apparatus 40.The three-level cavitation apparatus 30 include the 3rd cavitation device 32 and connected three-level anemostat 33.The 3rd shrink nozzle that 3rd cavitation device 32 is specially arranged straight down.The level Four cavitation apparatus 40 include the 4th cavitation device 42.The 4th shrink nozzle that 4th cavitation device 42 is specially arranged straight down, on the 4th shrink nozzle multiple cavitating nozzles are additionally provided with.4th cavitation device 42 is extended downwardly into the 4th cavitation chamber 43.The bottom of level Four cavitation apparatus 40 is additionally provided with outlet pipe 45 and drain valve 44.
Second level cavitation apparatus 20, third level cavitation apparatus 30 and fourth stage cavitation apparatus 40 are vertically configured from top to bottom；First order cavitation apparatus 100 are horizontally disposed and positioned at the top of the second level cavitation apparatus 20.
First order cavitation apparatus 100 are connected by the first support shrouding 104 with the second level cavitation apparatus 20；The second level cavitation apparatus 20 are connected by the second support shrouding 31 with the third level cavitation apparatus 30；The third level cavitation apparatus 30 are connected by the 3rd support shrouding 41 with the fourth stage cavitation apparatus 40.
The 4th cavitation device 42 carries out three-level and level Four cavitation process in pending mixed liquor containing sludge sequentially enters in the third level cavitation apparatus 30 the 3rd cavitation device 32 and fourth stage cavitation apparatus 40 after the two-stage cavitation process of first order cavitation apparatus 100 and second level cavitation apparatus 20 described in, most after Jing outlet pipes 45 discharge.The Hydrodynamic cavitation that the present invention is adopted subtracts mud motor spindle and is additionally provided with bearing 46.
The present invention during sludge cavitation, creates Cavitation condition by subtracting mud machine using Hydrodynamic cavitation, makes part hardly degraded organic substance Direct Resolution in sludge into C02、H20 etc..Hardly degraded organic substance macromolecular chain is fractured into small molecule chain, and is further oxidized to aliphatic acid, so as to improve the biodegradability of dirty Organic substance in water, namely supplements the carbon source in sewage.This mud mixture that improve carbon source is entered after biochemical system, can solve the problems, such as that sewage carbon source is not enough, so as to improve Nitrogen removal effect.
As shown in Fig. 2 present system adopts A2In the process chart of/O biochemical processing process, biological reaction pool includes anaerobic pond, anoxic pond and the Aerobic Pond being sequentially connected, and the arrival end of the one outlet end Jing pipeline connections anoxic pond of the Aerobic Pond constitutes the closed circuit for including the anoxic pond and Aerobic Pond；Another port of export of the Aerobic Pond is sequentially connected second pond and the sludge concentration tank.The sludge concentration tank port of export connects the Hydrodynamic cavitation and subtracts mud machine arrival end, and the Hydrodynamic cavitation subtracts the mud machine port of export and connects the anaerobic pond arrival end.The second pond is provided with the delivery port of sewage after processing.The Aerobic Pond is configured to keep the concentration of dissolved oxygen in more than 2.0mg/L, and 7.0～8.0, temperature range is 15～30 DEG C to pH value；The anoxic pond is configured to temperature range for 15～30 DEG C.
As shown in figure 3, present system is using in the process chart of oxidation ditch biochemical processing process, biological reaction pool includes anaerobic pond and the oxidation ditch being sequentially connected, and the oxidation ditch includes anoxic section and aerobic section；The port of export of the oxidation ditch is sequentially connected second pond and sludge concentration tank.The sludge concentration tank port of export connects the Hydrodynamic cavitation and subtracts mud machine arrival end, and the Hydrodynamic cavitation subtracts the mud machine port of export and connects the anaerobic pond arrival end.The second pond is provided with the delivery port of sewage after processing；The aerobic section is configured to keep the concentration of dissolved oxygen in more than 2.0mg/L, and 7.0～8.0, temperature range is 15～30 DEG C to pH value；The anoxic section is configured to temperature range for 15～30 DEG C.
As shown in figure 4, present system is using in the process chart of SBR biochemical processing process, biological reaction pool includes anaerobic pond and the sbr reactor pond being sequentially connected, and the sbr reactor pond port of export connects the sludge concentration tank.The sludge concentration tank port of export connects the Hydrodynamic cavitation and subtracts mud machine arrival end, and the Hydrodynamic cavitation subtracts the mud machine port of export and connects the anaerobic pond arrival end.The sbr reactor pond need to arrange the concentration of holding dissolved oxygen in more than 2.0mg/L when nitration reaction is carried out, and 7.0～8.0, temperature range is 15～30 DEG C of condition to pH value, when anti-nitration reaction is carried out, need to arrange temperature range for 15～30 DEG C.
As shown in figure 5, the inventive method is comprised the following steps：
Step A：Organic sewage is pre-processed, the floating thing and suspension in organic sewage is removed.In step A high concentration organic sewage mixture is pre-processed by the grid that is sequentially connected, setting pot.The grid is made up of the parallel metal grizzly bar of a group or array, plastic gear or metallic sieve, framework and relevant apparatus, it is inclined and mounted on the front end of foul drainage or sewage treatment plant, thicker floating thing and suspension in for retaining organic sewage mixture, such as：Fiber, onal, hair, pericarp, vegetables, wood chip, cloth, plastic products etc., reduce the scum silica frost that subsequent treatment is produced, it is ensured that the normal operation of sewage treatment facility.Sedimentation basin is used for suspended solid in the inorganic nature particulate matter or water for remove free settling in sewage, while also removing organic matter of the part in suspended state.
Step B：By the bioremediation of biological reaction pool, using the metabolism of microorganism, nitrogen, the phosphorus organic pollution materials in pretreated organic sewage are removed, and concentration is carried out to the effluent after biological treatment, reduce the water content of sludge in effluent；
Step C：Mud mixed liquid Jing after the process of step B subtract into Hydrodynamic cavitation produce after the first cavitation device 103 of mud machine high-speed jet impinge upon with first cavitation device 103 just to crushing baffle plate 102 on, the bulky grain sludge flco in mud mixed liquid is crushed, is caused Hydrodynamic cavitation to subtract the mixed liquor pressure in the one-level cavitation chamber 101 of mud machine and is further increased；Mud mixed liquid Jing after one-level cavitation subtracts the second cavitation device of mud machine 21 into Hydrodynamic cavitation, molten air cavity 23 in second level cavitation apparatus 20 and molten gas cavitation is produced under the collective effect of jet obligatory point 25；Mud mixed liquid after two grades of cavitations is discharged by two grades of anemostats 26.In step C, the mud mixed liquid preferably Jing after one-level cavitation subtracts the second cavitation device of mud machine 21 into Hydrodynamic cavitation, and molten gas cavitation is produced under the collective effect of heating collar 221, molten air cavity 23 and jet obligatory point 25 in second level cavitation apparatus 20.Step C also includes：The 4th cavitation device 42 carries out three-level and level Four cavitation process in pending mixed liquor containing sludge sequentially enters in the third level cavitation apparatus 30 in downstream the 3rd cavitation device 32 and fourth stage cavitation apparatus 40 after the two-stage cavitation process of first order cavitation apparatus 100 and second level cavitation apparatus 20 described in, most after Jing outlet pipes 45 discharge.
Step D：Mud mixture Jing after the process of step C is returned in biological reaction pool as supplementary carbon source, promotes nitrate nitrogen to be more converted into nitrogen effusion, and then improves denitrification effect.
As shown in Fig. 2 the present invention adopts A2Step B is specially in the process chart of/O biochemical processing process：
B0：Pretreated organic sewage mixture and the muddy water mixed solution containing high carbon source generated Jing after Hydrodynamic cavitation subtracts the effect of mud machine are entered in the anaerobic pond, the organic sewage mixture release phosphorus in the anaerobic pond, while partial organic substances are carried out with formation ammoniacal nitrogen after ammoniated treatment entering in the anoxic pond；
B1：The pretreated sewage mixed liquor of anaerobic pond described in Jing and the sewage mixed liquor from Aerobic Pond backflow are entered in the anoxic pond, the nitrate nitrogen that nitration reaction generation is carried out in Aerobic Pond is entered after anoxic pond, under anoxic conditions, nitrite nitrogen, nitrate nitrogen are reduced into gaseous nitrogen by denitrifying bacterium to remove from water, and then realize denitrogenation processing.Especially because the muddy water mixed solution containing high carbon source generated Jing after Hydrodynamic cavitation subtracts the effect of mud machine supplements the carbon source required for nitrate nitrogen denitrification, so as to significantly improve denitrification denitrogenation effect Jing after anaerobic pond enters anoxic pond.
B2：The Aerobic Pond is configured to keep the concentration of dissolved oxygen in more than 2.0mg/L, and 7.0～8.0, temperature range is 15～30 DEG C to pH value；Into the ammoniacal nitrogen in the sewage mixture of Aerobic Pond under aerobic condition, first ammoniacal nitrogen is converted into nitrite by nitrococcus, then by nitrifier by Nitrite transformation be nitrate；Part of contaminated water mixed-liquor return after Aerobic Pond process carries out nitrification denitrogenation into the anoxic pond.
Mud-water separation is carried out through the sewage mixed liquor of the Aerobic Pond into the second pond, suspended solid is separated from the water out, supernatant is used as the discharge purified water after process after separation, partial sludge mixture after separation subtracts into the Hydrodynamic cavitation after being concentrated into the sludge concentration tank and carry out in mud machine cavitation process, and the excess sludge after Hydrodynamic cavitation subtracts the process of mud machine is back to again in the anoxic pond as supplementary carbon source and proceeds biological treatment.
As shown in figure 3, during present system is using the process chart of oxidation ditch biochemical processing process, step B is specially：Pretreated organic sewage mixture and the muddy water mixed solution containing high carbon source generated Jing after Hydrodynamic cavitation subtracts the effect of mud machine are entered in the anaerobic pond, the organic sewage release phosphorus in the anaerobic pond, while partial organic substances are carried out with formation ammoniacal nitrogen after ammoniated treatment entering in the oxidation ditch；Ammoniacal nitrogen is converted into nitrite by organic sewage in the aerobic section of the oxidation ditch, first by nitrococcus, by Nitrite transformation is then nitrate by nitrifier；The sewage mixture of Jing nitrifications is entered in the anoxic section of the oxidation ditch, under anoxic conditions, nitrite nitrogen, nitrate nitrogen is reduced into gaseous nitrogen by denitrifying bacterium and is removed from water, and then realizes denitrogenation processing.Especially because the muddy water mixed solution containing high carbon source generated Jing after subtracting the effect of mud machine supplements the carbon source required for nitrate nitrogen denitrification, so as to significantly improve denitrification denitrogenation effect Jing after the anoxic section that anaerobic pond enters oxidation ditch.
Mud-water separation is carried out through the sewage mixed liquor of the oxidation ditch into the second pond, suspended solid is separated from the water out, supernatant is used as the discharge purified water after process after separation, partial sludge mixture after separation subtracts into the Hydrodynamic cavitation after being concentrated into the sludge concentration tank and carry out in mud machine cavitation process, and the excess sludge after Hydrodynamic cavitation subtracts the process of mud machine is back to again in the anaerobic pond as supplementary carbon source and proceeds biological treatment.
As shown in figure 4, during the present invention is using the process chart of SBR biochemical processing process, step B is specifically included：Pretreated organic sewage mixture and the muddy water mixed solution containing high carbon source generated Jing after Hydrodynamic cavitation subtracts the effect of mud machine are entered in the anaerobic pond, the organic sewage release phosphorus in the anaerobic pond, simultaneously partial organic substances are carried out with formation ammoniacal nitrogen after ammoniated treatment to enter in sbr reactor pond, first ammoniacal nitrogen is converted into nitrite by nitrococcus in sbr reactor pond, by Nitrite transformation is then nitrate by nitrifier；The sewage mixture of Jing nitrifications, under anoxic conditions, is reduced into gaseous nitrogen and removes from water by denitrifying bacterium by nitrite nitrogen, nitrate nitrogen, and then realizes denitrogenation processing.Because the muddy water mixed solution containing high carbon source generated Jing after subtracting the effect of mud machine is Jing after anaerobic pond enters sbr reactor pond, the carbon source required for nitrate nitrogen denitrification under anoxia condition is supplemented, so as to significantly improve denitrification denitrogenation effect.
Supernatant after the sbr reactor pond is processed is used as the discharge purified water after process, partial sludge mixture after process subtracts into the Hydrodynamic cavitation after being concentrated into the sludge concentration tank and carry out in mud machine cavitation process, and the excess sludge after Hydrodynamic cavitation subtracts the process of mud machine is back to again in the anaerobic pond as supplementary carbon source and proceeds biological treatment.
In the inventive method by Hydrodynamic cavitation subtract mud machine process sewage mixed liquor after two-stage cavitation process, will also be through third level cavitation apparatus 30 and the cavitation step of fourth stage cavitation apparatus 40.Through the continuous action of above-mentioned level Four cavitation, cavitation effect is enhanced, make the fragmentation of sludge flco and make hardly degraded organic substance Direct Resolution therein into C02、H20, hardly degraded organic substance macromolecular chain is fractured into small molecule chain, is then oxidized to aliphatic acid, so as to improve the biodegradability of organic matter of sewage.Create favorable conditions for subsequent biochemical reaction, organic matter is more easy to decomposition by biochemical action and is reduced, realize organic sludge minimizing.Using after the method, sludge quantum of output can reduce 60～70% to Sewage Plant.
The Hydrodynamic cavitation that the present invention is adopted subtracts utility device of the mud machine for comprehensive Hydrodynamic cavitation.Operation principle is as follows：The mud mixed liquid for providing certain flow and pressure by no-blocking pollution discharging pump subtracts in mud machine into Hydrodynamic cavitation, produces the continuous action of level Four cavitation, enhances the degree for the treatment of to sludge.No-blocking pollution discharging pump makes mud mixed liquid enter one-level cavitation device at a high speed, realize that the first time to mud mixed liquid pre-processes in the case where one-level cavitation device cavitation and one-level cavitation device outlet high-velocity flow clash into the comprehensive function that arc crushes baffle plate, to reach bulky grain sludge flco fragmentation, and enough pressure and flowrate proportioning is provided for second level cavitation effect.Next the continuous three-level cavitation muddy water pretreated to one-level cavitation is more fully processed, and is improved with this and is subtracted mud machine to the disposable by treatment effeciency of muddy water.
The coupling of above-mentioned level Four cavitation effect, makes the organic substance in sludge water obtain sufficient oxidation Decomposition.With the microjet of the shock wave of accompanied by intense during cavitation generation, and occur with tens thousand of continuous actions per second, efficient mechanical is brought to shred effect, and produce with high chemically active free radical-OH, subsequently there is oxidation reaction with organic pollution in solution, most organic pollutants oxidation Decomposition in mixed liquor is become into low molecular weight substance, the powerful hydraulic shear that shock wave and high-speed micro-jet are produced in mixed liquor, sludge structure is effectively destroyed, make the carbon bonds on macromolecular main chain, it is changed into short chain bottom molecular organic, flow out intracellular solutes, and be further broken off.
The effect of the inventive method is as follows：
Certain Sewage Plant begins to use present system and method to carry out denitrogenation within 2015.The sewage treatment plant transforms according to present system and runs, achieved with good denitrification effect.The sewage treatment plant adopted traditional technology before in May, 2015, using present system and method after in June, 2015, practical effect contrast is shown in Table 1, and Inlet and outlet water change of water quality correlation curve is shown in Fig. 6, and Fig. 7 sees using the June denitrification effect after the present invention in the factory.
Table 1, sewage treatment plant uses denitrification effect contrast before and after the present invention：
Application effect of the present invention shows：As shown in fig. 7, the factory is before using the present invention, the TN that sewage Jing is processed in after-purification water maintains always 12-14mg/L, after the present invention, the TN that sewage Jing is processed in after-purification water maintains always below 10mg/L, it can be seen that, the present invention significantly improves total nitrogen removal effect.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for a person skilled in the art, the present invention there can be various modifications and variations.All any modification, equivalent substitution and improvements made within the spirit and principles in the present invention etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of municipal sewage denitrogenation processing system, including the pretreatment, biological reaction pool, the sludge concentration tank that are sequentially connected, it is characterised in that：
Also subtract mud machine including a Hydrodynamic cavitation, the Hydrodynamic cavitation subtracts the arrival end and the port of export of mud machine and connects the arrival end of the sludge concentration tank port of export and biological reaction pool respectively to form a sewage water denitrification circulatory system；
The Hydrodynamic cavitation subtracts at least two-stage cavitation apparatus that mud machine includes mutually being serially connected；
First order cavitation apparatus（100）Including being placed in one-level cavitation chamber（101）The first interior cavitation device（103）And just to first cavitation device（103）The crushing baffle plate of outlet（102）；
Second level cavitation apparatus（20）Including the second cavitation device being linked in sequence（21）, jet obligatory point（25）With two grades of anemostats（26）, the jet obligatory point（25）Positioned at molten air cavity（23）It is interior, the molten air cavity（23）It is provided with molten gas governor motion；
The biological reaction pool is configured to keep the concentration of dissolved oxygen in more than 2.0mg/L during nitration reaction, and 7.0～8.0, temperature range is 15～30 DEG C to pH value.
2. municipal sewage denitrogenation processing system as claimed in claim 1, it is characterised in that：The Hydrodynamic cavitation subtracts mud machine also includes third level cavitation apparatus（30）With fourth stage cavitation apparatus（40）；The second level cavitation apparatus（20）, third level cavitation apparatus（30）With fourth stage cavitation apparatus（40）Vertically configure from top to bottom；The first order cavitation apparatus（100）It is horizontally disposed and positioned at the second level cavitation apparatus（20）Top；
The first order cavitation apparatus（100）Shrouding is supported by first（104）With the second level cavitation apparatus（20）Connection；The second level cavitation apparatus（20）Shrouding is supported by second（31）With the third level cavitation apparatus（30）Connection；The third level cavitation apparatus（30）Shrouding is supported by the 3rd（41）With the fourth stage cavitation apparatus（40）Connection.
3. municipal sewage denitrogenation processing system as claimed in claim 1, it is characterised in that：The pretreatment includes grid and the setting pot being sequentially connected.
4. the municipal sewage denitrogenation processing system as described in any one of claims 1 to 3, it is characterised in that：The biological reaction pool includes anaerobic pond, anoxic pond and the Aerobic Pond being sequentially connected, and the arrival end of the one outlet end Jing pipeline connections anoxic pond of the Aerobic Pond constitutes the closed circuit for including the anoxic pond and Aerobic Pond；Another port of export of the Aerobic Pond is sequentially connected second pond and the sludge concentration tank, and the second pond is provided with the delivery port of sewage after processing；The Aerobic Pond is configured to keep the concentration of dissolved oxygen in more than 2.0mg/L, and 7.0～8.0, temperature range is 15～30 DEG C to pH value；The anoxic pond is configured to temperature range for 15～30 DEG C.
5. the municipal sewage denitrogenation processing system as described in any one of claims 1 to 3, it is characterised in that：The biological reaction pool includes anaerobic pond and the oxidation ditch being sequentially connected, and the oxidation ditch includes anoxic section and aerobic section；The port of export of the oxidation ditch is sequentially connected second pond and sludge concentration tank, and the second pond is provided with the delivery port of sewage after processing；The aerobic section is configured to keep the concentration of dissolved oxygen in more than 2.0mg/L, and 7.0～8.0, temperature range is 15～30 DEG C to pH value；The anoxic section is configured to temperature range for 15～30 DEG C.
6. the municipal sewage denitrogenation processing system as described in any one of claims 1 to 3, it is characterised in that：The biological reaction pool includes anaerobic pond and the sbr reactor pond being sequentially connected, and the sbr reactor pond port of export connects the sludge concentration tank.
7. a kind of municipal sewage denitrifying method, it is characterised in that comprise the following steps：
Step A：Organic sewage is pre-processed, the suspension in organic sewage is removed；
Step B：By the bioremediation of biological reaction pool, using the metabolism of microorganism, nitrogen, the phosphorus organic pollution materials in pretreated organic sewage are removed, and concentration is carried out to the effluent after biological treatment by sludge concentration tank, reduce the water content of sludge in effluent；
Step C：Mud mixed liquid Jing after the process of step B subtracts the first cavitation device of mud machine into Hydrodynamic cavitation（103）Produce high-speed jet afterwards to impinge upon and first cavitation device（103）Just to crushing baffle plate（102）On, the bulky grain sludge flco in mud mixed liquid is crushed, cause Hydrodynamic cavitation to subtract the one-level cavitation chamber of mud machine（101）Interior mixed liquor pressure further increases；Mud mixed liquid Jing after one-level cavitation subtracts the cavitation device of mud machine second into Hydrodynamic cavitation（21）, in second level cavitation apparatus（20）Interior molten air cavity（23）And jet obligatory point（25）Collective effect under produce molten gas cavitation；Mud mixed liquid after two grades of cavitations passes through two grades of anemostats（26）Discharge；
Step D：Muddy water mixed solution Jing after the process of step C is returned in biological reaction pool as supplementary carbon source, promotes nitrate nitrogen to be more converted into nitrogen effusion, and then improves denitrification effect.
8. municipal sewage denitrifying method as claimed in claim 7, it is characterised in that：
The method step C also includes：First order cavitation apparatus described in pending mixed liquor Jing containing sludge（100）With second level cavitation apparatus（20）Two-stage cavitation process after sequentially enter the third level cavitation apparatus in downstream（30）The 3rd interior cavitation device（32）With fourth stage cavitation apparatus（40）Interior 4th cavitation device（42）Carry out three-level and level Four cavitation process, most after Jing outlet pipes（45）Discharge.
9. the municipal sewage denitrifying method as described in any one of claim 7 to 8, it is characterised in that：
Step B is specially：
B0：Pretreated organic sewage mixture and the muddy water mixed solution containing high carbon source generated Jing after Hydrodynamic cavitation subtracts the effect of mud machine are entered in the anaerobic pond, the organic sewage mixture release phosphorus in the anaerobic pond, while partial organic substances are carried out with formation ammoniacal nitrogen after ammoniated treatment entering in the anoxic pond；
B1：The pretreated sewage mixed liquor of anaerobic pond described in Jing and the sewage mixed liquor from Aerobic Pond backflow are entered in the anoxic pond, the nitrate nitrogen that nitration reaction generation is carried out in Aerobic Pond is entered after anoxic pond, under anoxic conditions, nitrite nitrogen, nitrate nitrogen are reduced into gaseous nitrogen by denitrifying bacterium to remove from water, and then realize denitrogenation processing；
B2：The Aerobic Pond is configured to keep the concentration of dissolved oxygen in more than 2.0mg/L, and 7.0～8.0, temperature range is 15～30 DEG C to pH value；Into the ammoniacal nitrogen in the sewage mixture of Aerobic Pond under aerobic condition, first ammoniacal nitrogen is converted into nitrite by nitrococcus, then by nitrifier by Nitrite transformation be nitrate；Part of contaminated water mixed-liquor return after Aerobic Pond process carries out nitrification denitrogenation into the anoxic pond.
10. the municipal sewage denitrifying method as described in any one of claim 7 to 8, it is characterised in that：
Step B is specially：
Pretreated organic sewage mixture and the muddy water mixed solution containing high carbon source generated Jing after Hydrodynamic cavitation subtracts the effect of mud machine are entered in the anaerobic pond, the organic sewage release phosphorus in the anaerobic pond, while partial organic substances are carried out with formation ammoniacal nitrogen after ammoniated treatment entering in the oxidation ditch；Ammoniacal nitrogen is converted into nitrite by organic sewage in the aerobic section of the oxidation ditch, first by nitrococcus, by Nitrite transformation is then nitrate by nitrifier；The sewage mixture of Jing nitrifications is entered in the anoxic section of the oxidation ditch, under anoxic conditions, nitrite nitrogen, nitrate nitrogen is reduced into gaseous nitrogen by denitrifying bacterium and is removed from water, and then realizes denitrogenation processing；
Or step B is specially：Pretreated organic sewage mixture and the muddy water mixed solution containing high carbon source generated Jing after Hydrodynamic cavitation subtracts the effect of mud machine are entered in the anaerobic pond, the organic sewage release phosphorus in the anaerobic pond, simultaneously partial organic substances are carried out with formation ammoniacal nitrogen after ammoniated treatment to enter in sbr reactor pond, first ammoniacal nitrogen is converted into nitrite by nitrococcus in sbr reactor pond, by Nitrite transformation is then nitrate by nitrifier；The sewage mixture of Jing nitrifications, under anoxic conditions, is reduced into gaseous nitrogen and removes from water by denitrifying bacterium by nitrite nitrogen, nitrate nitrogen, and then realizes denitrogenation processing.
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Cited By (7)
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| WO2018201303A1 (en) * | 2017-05-02 | 2018-11-08 | 东莞源控环保科技有限公司 | Hydrodynamic cavitation sludge-reduction machine and wastewater treatment method thereof |
| WO2018201302A1 (en) * | 2017-05-02 | 2018-11-08 | 东莞源控环保科技有限公司 | Denitrification treatment system and method for urban wastewater |
| CN109824173A (en) * | 2019-03-30 | 2019-05-31 | 山东大学 | A kind of organic wastewater three-level waterpower cavitation process system |
| WO2019140497A1 (en) * | 2018-01-16 | 2019-07-25 | Butke Jose Carlos | System and equipment for treating sewage by hydro cavitation and advanced oxidation, in combination with biological systems, with or without media (mbbr) to accomodate various flows |
| CN110217957A (en) * | 2019-03-30 | 2019-09-10 | 山东大学 | A kind of inactivated sludge degradation equipment of Hydrodynamic Cavitation |
| CN111646655A (en) * | 2020-06-30 | 2020-09-11 | 广东源控环保科技有限公司 | AA/O treatment process for hydrodynamic cavitation mud reduction |
| CN113024060A (en) * | 2021-04-20 | 2021-06-25 | 辽宁大学 | Sludge treatment system based on hydrodynamic cavitation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018201303A1 (en) * | 2017-05-02 | 2018-11-08 | 东莞源控环保科技有限公司 | Hydrodynamic cavitation sludge-reduction machine and wastewater treatment method thereof |
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| CN110217957A (en) * | 2019-03-30 | 2019-09-10 | 山东大学 | A kind of inactivated sludge degradation equipment of Hydrodynamic Cavitation |
| CN110217957B (en) * | 2019-03-30 | 2021-11-02 | 山东大学 | Inactivation sludge degradation hydrodynamic cavitation device |
| CN111646655A (en) * | 2020-06-30 | 2020-09-11 | 广东源控环保科技有限公司 | AA/O treatment process for hydrodynamic cavitation mud reduction |
| CN111646655B (en) * | 2020-06-30 | 2021-08-20 | 广东源控环保科技有限公司 | AA/O treatment process for hydrodynamic cavitation mud reduction |
| CN113024060A (en) * | 2021-04-20 | 2021-06-25 | 辽宁大学 | Sludge treatment system based on hydrodynamic cavitation |
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