CN216191392U - Dephosphorization denitrification active sludge thickener for treating sewage with low carbon-nitrogen ratio and treatment device - Google Patents
Dephosphorization denitrification active sludge thickener for treating sewage with low carbon-nitrogen ratio and treatment device Download PDFInfo
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- CN216191392U CN216191392U CN202122503561.1U CN202122503561U CN216191392U CN 216191392 U CN216191392 U CN 216191392U CN 202122503561 U CN202122503561 U CN 202122503561U CN 216191392 U CN216191392 U CN 216191392U
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Abstract
The utility model discloses a phosphorus and nitrogen removal activated sludge thickener and a treatment device for treating sewage with low carbon-nitrogen ratio, wherein the thickener comprises: the reactor body is provided with a water outlet; a first pipe body; the reactor comprises at least one flow guide rotational flow plate, a reactor body and a reactor shell, wherein the flow guide rotational flow plate comprises a rotational flow plate main body and a plurality of flow guide vane plates; and at least one water inlet pipe which introduces the sludge into the reactor body in a rotating mode, wherein the rotating direction of each water inlet pipe is the same as the arrangement direction of the guide vane plates. The processing device includes: a grid tank; a hydrolysis acidification pool; a biological contact aerobic tank; a sedimentation tank; a thickener. The utility model can effectively solve the problem that the sewage with high ammonia nitrogen, high phosphorus, unbalanced carbon/nitrogen ratio and low carbon-nitrogen ratio can not be discharged up to the standard by adopting the traditional process.
Description
Technical Field
The utility model relates to the technical field of rural domestic sewage treatment. More particularly, the utility model relates to a phosphorus and nitrogen removal activated sludge thickener and a treatment device for treating sewage with low carbon-nitrogen ratio.
Background
With the development of our society and the increasing living standard of people, the content of nitrogen and phosphorus pollutants in natural water is greatly increased due to the large amount of domestic sewage discharged in daily life, particularly the domestic sewage at the first level of villages and villages. Data obtained from random detection show that the rural domestic sewage is generally lack of carbon sources, and the sewage with a seriously unbalanced carbon/nitrogen ratio and a low carbon-nitrogen ratio exists. After the traditional biochemical sewage treatment process is applied for treatment, the discharged water quality of ammonia nitrogen and phosphorus seriously exceeds the standard, and is difficult to reach the first grade B discharge standard of the national pollutant discharge Standard of urban Sewage treatment plant (GB 18918-. Since low carbon nitrogen is more common than sewage, how to improve the effective and deep purification treatment of the sewage is urgent. At present, A/O + artificial wetland mixed technology is mostly adopted for treating rural domestic sewage, but the technology has the following defects: (1) the treatment process line is long (2), and the occupied area is large; (3) the influent water CODcr is low, the ammonia nitrogen concentration is high, the carbon/nitrogen ratio is unbalanced, the power consumption is high, and the effluent can not reach the discharge standard.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a phosphorus and nitrogen removal activated sludge thickener and a treatment device for treating sewage with low carbon-nitrogen ratio, so as to effectively solve the problem that domestic sewage in first-grade rural areas of rural areas and villages cannot reach the standard for discharge.
To achieve these objects and other advantages in accordance with the present invention, there is provided a dephosphorizing and denitrifying activated sludge thickener for treating low carbon-nitrogen ratio sewage, comprising:
the reactor body is provided with a water outlet;
a first pipe body;
the reactor comprises a reactor body, at least one flow guide rotational flow plate, a plurality of flow guide vanes and a plurality of reaction chambers, wherein the flow guide rotational flow plate comprises a rotational flow plate main body and a plurality of flow guide vanes; when one diversion rotational flow plate is arranged, the water outlet is arranged above the diversion rotational flow plate, and the first pipe body is arranged below the diversion rotational flow plate; when the number of the flow guide rotational flow plates is multiple, the multiple flow guide rotational flow plates are arranged in the reactor body at intervals, the water outlet is arranged above the topmost flow guide rotational flow plate, and the first pipe body is arranged below the bottommost flow guide rotational flow plate;
at least one inlet tube, it is originally internal with the leading-in reactor of mud with rotatory mode, each inlet tube to this internal leading-in mud of reactor this the direction of rotation of reactor with the array orientation of polylith water conservancy diversion lamina is the same, when water conservancy diversion whirl board has one, each inlet tube all sets up the below at water conservancy diversion whirl board, when water conservancy diversion whirl board has a plurality ofly, all is provided with at least one inlet tube between two adjacent water conservancy diversion whirl boards.
Preferably, in the dephosphorizing and denitrifying activated sludge thickener for treating sewage with low carbon-nitrogen ratio, when one diversion rotational flow plate is arranged, only one water inlet pipe is arranged below the diversion rotational flow plate; when the flow guide rotational flow plates are multiple, a water inlet pipe is arranged between every two adjacent flow guide rotational flow plates.
Preferably, in the dephosphorizing and denitrifying activated sludge thickener for treating sewage with low carbon-nitrogen ratio, the first pipe body is arranged at the bottom of the reactor body.
Preferably, in the dephosphorizing and denitrifying activated sludge thickener for treating sewage with low carbon-nitrogen ratio, an effluent weir is arranged in the reactor body, the effluent weir is positioned above the topmost diversion rotational flow plate and is separated from the topmost diversion rotational flow plate by a certain distance, and an effluent weir mouth of the effluent weir is communicated with the water outlet.
Preferably, in the dephosphorizing and denitrifying activated sludge thickener for treating sewage with low carbon-nitrogen ratio, the reactor body is cylindrical, the main body of the rotational flow plate is cylindrical, and the parts of the water inlet pipes connected with the reactor body are tangent to the reactor body.
Preferably, in the dephosphorizing and denitrifying activated sludge thickener for treating sewage with low carbon-nitrogen ratio, the flow guide rotational flow plate further comprises a central pipe, the central pipe is arranged in the middle of the flow guide rotational flow plate along the vertical direction, and the other end of each flow guide vane plate on any flow guide rotational flow plate is fixed on the central pipe corresponding to the flow guide rotational flow plate.
Preferably, in the dephosphorizing and denitrifying activated sludge thickener for treating sewage with low carbon-nitrogen ratio, the guide vane plate is rectangular and has an included angle of 20-30 degrees with the vertical direction.
Preferably, in the dephosphorizing and denitrifying activated sludge thickener for treating sewage with low carbon-nitrogen ratio, the vertical projections of two adjacent guide vane plates on the guide rotational flow plate are partially overlapped.
Adopt sewage treatment plant of thickener, include:
a grid tank;
the hydrolysis acidification pool is connected with the grid pool;
the biological contact aerobic tank is connected with the hydrolysis acidification tank;
the sedimentation tank is connected with the biological contact aerobic tank;
the thickener comprises a thickener, wherein each water inlet pipe on the thickener is communicated with a sludge discharge port of a sedimentation tank, a water pump is arranged between each water inlet pipe and the sludge discharge port of the sedimentation tank, a water outlet of a reactor body is communicated with a water inlet of a biological contact aerobic tank, a first pipe body is communicated with the sludge discharge port of the sedimentation tank, and the water pump is arranged between the sludge discharge ports of the first pipe body and the sedimentation tank.
Preferably, in the sewage treatment device, the first pipe body is provided with a first valve body and a second valve body;
the sewage treatment device further comprises:
each water inlet pipe is communicated with a sludge discharge port of the sedimentation tank through the second pipe body, a third valve body and a water pump are arranged on the second pipe body, and the water pump on the second pipe body is positioned between the third valve body and the sludge discharge port of the sedimentation tank;
and one end of the third pipe body is communicated with the second pipe body and is positioned between the water pump on the second pipe body and the third valve body, the other end of the third pipe body is positioned between the first valve body and the second valve body, and the third pipe body is provided with a fourth valve body.
The utility model at least comprises the following beneficial effects:
the activated sludge thickening device provided by the utility model is a place for creating biochemical reaction environment and conditions for enriching nitrogen and phosphorus removal for biological floras. Scientifically utilizes the advantages of the active microbial flora in anaerobic and aerobic biochemical treatment, and fully utilizes the biological flora to remove nitrogen and phosphorus. The method effectively solves the problem that the sewage with high ammonia nitrogen, high phosphorus, unbalanced carbon/nitrogen ratio and low carbon-nitrogen ratio can not be discharged up to the standard by adopting the traditional process.
The activated sludge thickening device provided by the utility model is mainly used for enriching and utilizing activated sludge (containing anaerobic ammonium oxidation bacteria) and directly adding NH by taking nitrite as an electron acceptor4Conversion of + -N to N2And the reaction site is used for removing the biological nitrogen and phosphorus removal of ammonia nitrogen. Compared with the traditional nitrification and denitrification process, the biological nitrogen and phosphorus removal reactor does not need to additionally add organic carbon sources (glucose and the like) for denitrification and nitrification, does not need to additionally add any chemical for nitrogen and phosphorus removal, and is a biological nitrogen and phosphorus removal reactor which can save energy consumption and reduce the operation cost of sewage treatment. The reactor has the advantages of biological sewage purification and high-efficiency biological nitrogen and phosphorus removal. Can replace ammonia nitrogen removal facilities and dosing devices in the traditional sewage treatment facilities, can reduce the investment cost and the land occupation area of the sewage treatment engineering construction, and reduces the operation cost.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.
Drawings
FIG. 1 is a schematic diagram of the structure of an activated sludge thickener according to one embodiment of the present invention;
FIG. 2 is a schematic structural view of a sewage treatment apparatus for treating low carbon-nitrogen ratio sewage according to an embodiment of the present invention;
FIG. 3 is a schematic view of a plurality of guide vanes of the flow directing swirler plate arranged in a clockwise direction according to an embodiment of the present invention;
fig. 4 is a schematic structural view illustrating a plurality of guide vanes of the flow guide swirl plate arranged in a counterclockwise direction according to an embodiment of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the utility model by referring to the description text.
It should be noted that in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, 3 and 4, the present invention provides a dephosphorizing and denitrifying activated sludge thickener for treating sewage with a low carbon-nitrogen ratio, comprising:
the reactor comprises a reactor body 1, a water outlet and a water outlet, wherein the reactor body is provided with the water outlet;
the first pipe body 2 (a back flushing pipe) is used for introducing sludge into the reactor body 1 to back flush and replace the activated sludge subjected to biological nitrogen and phosphorus removal in the reactor body 1;
at least one flow guiding rotational flow plate 3, wherein the flow guiding rotational flow plate 3 comprises a rotational flow plate main body 301 and a plurality of flow guiding vanes 302, the rotational flow plate main body 301 is cylindrical and is vertically arranged on the reactor body 1, for example, the outer side wall of the rotational flow plate main body 301 is fixed on the inner side wall of the reactor body 1, the plurality of flow guiding vanes 302 are arranged in the rotational flow plate main body 301 at intervals along the clockwise or counterclockwise direction, one end of each flow guiding vane 302 is fixed on the rotational flow plate main body 301, the other end of each flow guiding vane 302 extends towards the center of the rotational flow plate main body 301, and the flow guiding vanes 302 are gradually inclined downwards from the top towards the arrangement direction of the plurality of flow guiding vanes 302 corresponding to the flow guiding vanes, so that sewage above the flow guiding vanes can flow to the lower part of the flow guiding vanes, and sludge below the flow guiding vanes can be prevented from upwards, and water can flow upwards; when one diversion rotational flow plate 3 is arranged, the water outlet is arranged above the diversion rotational flow plate 3, and the first pipe body 2 is arranged below the diversion rotational flow plate 3; when a plurality of flow guide rotational flow plates 3 are arranged, the plurality of flow guide rotational flow plates 3 are arranged in the reactor body 1 at intervals, the water outlet is arranged above the topmost flow guide rotational flow plate 3, and the first pipe body 2 is arranged below the bottommost flow guide rotational flow plate 3; the diversion rotational flow plate 3 can guide the suspended and settled activated sludge to the lower anoxic anaerobic biological reaction zone 6 for nitrogen and phosphorus removal.
The sludge is guided into the reactor body 1 by the at least one water inlet pipe 4 in a rotating mode, namely, each water inlet pipe 4 is connected into the reactor body 1 in a tangential direction, a water inlet port of each water inlet pipe 4 is positioned on the same horizontal line with a biological reaction bed of the biological reaction zone 6, the activated sludge is pushed to slowly rotate and settle in the reactor body 1 by utilizing the hydrodynamic force of the returned sludge, the sludge and water separation and precipitation are promoted, and the purpose of thickening the activated sludge is achieved, the rotating direction of the sludge, guided into the reactor body 1, of each water inlet pipe 4 is the same as the arrangement direction of the guide vane plates 302 in the reactor body 1, when one guide swirl plate 3 is arranged, each water inlet pipe 4 is arranged below the guide swirl plate 3, a natural settling zone 5 is formed above the guide swirl plate 3, and a biological reaction zone 6 is formed below the guide swirl plate 3; when water conservancy diversion whirl plate 3 has a plurality ofly, all be provided with an at least inlet tube 4 between two adjacent water conservancy diversion whirl plates 3, natural settling zone 5 is formed to the top of the water conservancy diversion whirl plate 3 at top, forms biological reaction area 6 between two adjacent water conservancy diversion whirl plates 3.
The natural settling zone 5 is a slow rotational flow, natural settling thickening and mud-water separation settling zone created for suspended activated sludge, thickened sludge settles downwards, and supernatant is discharged from a water outlet of the reactor body 1.
The biological reaction zone 6 is a biological and biochemical reaction coexistence place which is rich in oxygen deficiency, anaerobic and has the functions of nitrification and denitrification and is used for efficiently removing nitrogen and phosphorus by anaerobic ammonium oxidation bacteria on the basis of decomposing biological carrier strains by adding nitrite.
When the plurality of guide vane plates 302 on the guide rotational flow plate 3 are arranged at intervals along the clockwise direction, the water inlet pipe 4 guides the sludge into the reactor body 1 along the clockwise direction, and the guide rotational flow plate 3 slowly rotates, guides, settles and thickens the activated sludge in the natural settling area 5 along the clockwise direction to promote biological and biochemical reactions; when the plurality of guide vane plates 302 on the guide rotational flow plate 3 are arranged at intervals along the anticlockwise direction, the water inlet pipe 4 guides the sludge into the reactor body 1 along the anticlockwise direction, and the guide rotational flow plate 3 slowly rotates, guides, settles and thickens the activated sludge in the natural settling area 5 along the anticlockwise direction, so as to promote biological and biochemical reactions; when backflushing is carried out, the diversion rotational flow plate 3 can prevent the activated sludge cenobium in the biological reaction area 6 from being completely replaced and flushed out, and can intercept most of biological and biochemical activated sludge cenobium to continue biochemical reaction.
The utility model provides a handle dephosphorization denitrogenation activated sludge thickener of sewage with low carbon-nitrogen ratio, when using, mud (wherein mainly have nitrosobacteria, phosphorus accumulation bacterium, anaerobic ammonium oxidation bacterium etc.) gets into reactor body 1 with rotatory mode through inlet tube 4, utilize the fluid power of backward flow mud, promote activated sludge and rotate slowly in reactor body 1, subside, reactor body 1 forms natural settling zone 5 and biological reaction district 6, the mud that thickens in natural settling zone 5 subsides downwards, the supernatant is discharged from the delivery port of reactor body 1, activated sludge carries out the nitrogen and phosphorus removal in biological reaction district 6. After the thickener is used for a period of time, sludge is pumped into the reactor body 1 through the first pipe body 2 (a backflushing pipe), activated sludge which is subjected to biological nitrogen and phosphorus removal in the biological reaction zone 6 is backflushed and replaced by utilizing fluid power, and the replaced sludge is discharged through a water outlet of the reactor body 1. After the back flushing is finished, the sludge is continuously led into the reactor body 1 through the water inlet pipe 4.
In another technical scheme, in the dephosphorizing and denitrifying activated sludge thickener for treating the sewage with the low carbon-nitrogen ratio, when one diversion rotational flow plate 3 is arranged, only one water inlet pipe 4 is arranged below the diversion rotational flow plate 3; when the water conservancy diversion whirl plate 3 has a plurality ofly, all be provided with a inlet tube 4 between two adjacent water conservancy diversion whirl plates 3.
In another technical scheme, in the dephosphorizing and denitrifying activated sludge thickener for treating the sewage with the low carbon-nitrogen ratio, the first pipe body 2 (the recoil pipe) is arranged at the bottom of the reactor body 1. The first pipe body 2 enables sewage to enter from the bottom of the reactor body 1 and then to be backflushed, so that loosening of the whole biological reaction bed and replacement and updating of most activated sludge are facilitated.
In another technical scheme, in the dephosphorizing and denitrifying activated sludge thickener for treating sewage with low carbon-nitrogen ratio, a water outlet weir 7 is arranged in the reactor body 1, the water outlet weir 7 is positioned above the topmost diversion rotational flow plate 3 and is separated from the topmost diversion rotational flow plate 3 by a certain distance, and a water outlet weir mouth of the water outlet weir 7 is communicated with the water outlet. The thickened sludge in the natural settling zone 5 settles downwards, and the supernatant overflows through the effluent weir 7 and is discharged from the water outlet of the reactor body 1.
In another technical scheme, in the dephosphorizing and denitrifying activated sludge thickener for treating sewage with low carbon-nitrogen ratio, the reactor body 1 is cylindrical, the rotational flow plate main body 301 is cylindrical and is coaxially arranged, and the parts of the water inlet pipes connected with the reactor body are tangent to the reactor body. For example, the water inlet pipe is of a volute structure and is connected into the reactor body from one side of the reactor body, so that the sludge can move forwards along the tangential direction of the reactor body.
In another technical scheme, in the dephosphorizing and denitrifying activated sludge thickener for treating sewage with low carbon-nitrogen ratio, the flow guide rotational flow plate 3 further comprises a central pipe 303, the central pipe 303 is arranged in the middle of the flow guide rotational flow plate 3 along the vertical direction, and the other end of each flow guide vane plate 302 on any flow guide rotational flow plate 3 is fixed on the central pipe 303 corresponding to the flow guide rotational flow plate. The central pipe 303 can ensure smooth flow of fluid, and effectively avoid blockage caused by increased density and overstocked sediment during thickening of sludge.
In another technical scheme, in the dephosphorizing and denitrifying activated sludge thickener for treating sewage with low carbon-nitrogen ratio, the flow guide vane plate 302 is rectangular, and the included angle between the flow guide vane plate and the vertical direction is 20-30 degrees.
In another technical scheme, in the dephosphorizing and denitrifying activated sludge thickener for treating sewage with low carbon-nitrogen ratio, the vertical projection parts of two adjacent guide vane plates 302 on the guide cyclone plate 3 are overlapped, which shows that the distance between the two adjacent guide vane plates 302 is not large, so that the sludge can be blocked and prevented from being directly upwards from the space between the two adjacent guide vane plates 302.
The utility model discloses a nitrogen and phosphorus removal activated sludge thickening device for treating sewage with a low carbon-nitrogen ratio, and relates to the technical field of rural domestic sewage treatment. Is an additional biological and biochemical treatment reactor for treating sewage by anaerobic and aerobic biological activated sludge in the traditional sewage treatment process of AO and A2O. The activated sludge thickening device is mainly used for enriching and utilizing activated sludge (containing anaerobic ammonium oxidation bacteria) and directly adding NH by taking nitrite as an electron acceptor4Conversion of + -N to N2Is a biological reaction site for biological nitrogen and phosphorus removal for removing ammonia nitrogen. Compared with the traditional nitrification and denitrification process, the biological nitrogen and phosphorus removal reactor does not need to additionally add organic carbon sources (glucose and the like) for denitrification and nitrification, does not need to add any chemical for nitrogen and phosphorus removal, and is a biological nitrogen and phosphorus removal reactor which can save energy consumption and reduce the operation cost of sewage treatment. The method is characterized in that: not only has the advantages of biological sewage purification, but also has the efficiency of high-efficiency biological nitrogen and phosphorus removal. The method effectively solves the problem that the sewage with high ammonia nitrogen, high phosphorus, unbalanced carbon/nitrogen ratio and low carbon-nitrogen ratio can not be discharged up to the standard by adopting the traditional process. The water quality after sewage treatment reaches GB18918-2002 first-grade B discharge standard.
Provides a biological and biochemical reaction site special for the activated sludge for nitrogen and phosphorus removal through a sludge thickening device. Because, in the conventional sewage treatment process of A/O, A2O and the like, in the aerobic aeration aerobic biological treatment stage, anaerobic ammonia oxidizing bacteria are inhibited, and the ammonia nitrogen removal rate is rapidly reduced; but endows the anaerobic ammonium oxidation bacteria with the capability of recovering the activity and biologically removing ammonia nitrogen under the specific biochemical reaction conditions of anoxia, pH value, temperature, HRT and the like. The biological denitrification and dephosphorization effectively solves the problems of high ammonia nitrogen and phosphorus content, unbalanced carbon/nitrogen ratio and incapability of reaching the discharge standard by applying the traditional process treatment in the rural domestic sewage at present. Compared with the traditional nitrification and denitrification process, the biological nitrogen and phosphorus removal reactor does not need to additionally add organic carbon sources (glucose and the like) for denitrification and nitrification, does not need to add any chemical for nitrogen and phosphorus removal, and is a biological nitrogen and phosphorus removal reactor which can save energy consumption and reduce the operation cost of sewage treatment. As shown in fig. 2, the sewage treatment apparatus using a thickener includes:
the grating pool 8 is used for roughly isolating and removing various sundries such as leaves, branches, coarse fiber matters and the like scattered in the sewage;
a hydrolysis acidification pool 9 connected with the grid pool 8; the hydrolysis acidification pool 9 mainly takes biological selection and biological nitrification to decompose organic matters in the sewage into monosaccharide, amino acid, fatty phthalein, glycerol and other micromolecule substances which are easy to decompose;
the biological contact aerobic tank 10 is connected with the hydrolysis acidification tank 9; the biological contact aerobic tank 10 is internally provided with biological selection and biological nitrification, the bottom of the biological contact aerobic tank is provided with an aeration component, biological fillers are filled in the biological contact aerobic tank, and under the aeration environment, the organic substances, ammonia nitrogen and phosphorus in sewage are removed by utilizing the oxidation and decomposition action of microorganisms in a biological membrane attached by organisms and the denitrification action of a microenvironment in the microbial membrane.
A sedimentation tank 11 connected with the biological contact aerobic tank 10; the sedimentation tank is a place for carrying out suspended activated sludge sedimentation and water separation after biological nitrification and denitrification of the sewage; the precipitated activated sludge flows back to the nitrogen and phosphorus removal activated sludge thickening device through the sludge reflux pump.
The thick ware, each inlet tube 4 on it all communicates with the mud discharging port of sedimentation tank, and all is provided with the water pump between the mud discharging port of each inlet tube 4 and sedimentation tank, the delivery port of reactor body 1 and the water inlet intercommunication of biological contact aerobic tank 10, first body 2 (recoil pipe) and the mud discharging port intercommunication of sedimentation tank, and be provided with the water pump between the mud discharging port of first body 2 and sedimentation tank. An activated sludge biological reaction bed is arranged in the thickener, and the returned activated sludge mainly contains three biological bacteria: nitrosobacteria, phosphorus accumulating bacteria and anaerobic ammonium oxidation bacteria. Partial shortcut nitrification and aerobic phosphorus absorption reaction are carried out in the aeration section, and partial synchronous anaerobic ammonia oxidation reaction is simultaneously carried out; in the anoxic section, the anaerobic ammonia oxidizing bacteria utilize the residual ammonia nitrogen and nitrite generated by short-range nitrification to perform anaerobic ammonia oxidation reaction. The activated sludge biological reaction bed is arranged in the thickener, which is a place for artificially endowing anaerobic ammonium oxidation bacteria with specific conditions and environment for biological and biochemical reactions, and the purpose of biological nitrogen and phosphorus removal can be achieved by adopting the thickener.
Domestic sewage is subjected to coarse isolation and removal of sundries such as various leaves, branches, coarse fibers and the like scattered in the sewage through a grating tank 8, then the sewage flows to a hydrolysis acidification tank 9, after being treated in the hydrolysis acidification tank 9, the sewage enters a biological contact aerobic tank 10, organic substances, ammonia nitrogen and phosphorus in the sewage are removed in the biological contact aerobic tank 10, the sewage enters a sedimentation tank, then the precipitated sludge enters the reactor body 1 through the water inlet pipe 4 in a rotating way, the fluid power of the returned sludge is utilized to push the activated sludge to slowly rotate and settle in the reactor body 1, a natural settling zone 5 and a biological reaction zone 6 are formed in the reactor body 1, the thickened sludge in the natural settling zone 5 settles downwards, the supernatant flows back to the biological contact aerobic tank 10 from the water outlet of the reactor body 1 to continue the nitrification treatment, and the activated sludge performs nitrogen and phosphorus removal in the biological reaction zone 6. After the thickener is used for a period of time, activated sludge continuously grows and increases, the excess sludge needs to be discharged periodically, the sludge is pumped into the reactor body 1 through the first pipe body 2, the activated sludge subjected to biological nitrogen and phosphorus removal in the biological reaction zone 6 is backflushed and replaced by utilizing fluid power, and the replaced sludge is discharged into the biological contact aerobic tank 10 through the water outlet of the reactor body 1 to be subjected to nitrification treatment continuously. After the back flushing is finished, the sludge is continuously led into the reactor body 1 through the water inlet pipe 4.
The denitrified and dephosphorized activated sludge is backflushed and reflows to the biological contact aerobic tank 10 for biochemical treatment, so that the sludge concentration of the sewage treatment system, the biomass of the activated sludge and the treatment efficiency of the activated sludge are increased. In the A/O, A2O sewage treatment system, the design process requires a one hundred percent return flow of the sludge in the sedimentation tank, and the return flow is used for improving the active sludge concentration and the active sludge biomass of the sewage treatment system so as to improve the treatment efficiency and effect of the sewage treatment system.
A thickening device is added in a circuit, and mainly aims to solve the problem that in the aerobic aeration (in a biological contact oxidation tank) aerobic biological treatment stage, the bacterial groups such as anaerobic ammonium oxidation bacteria for nitrogen and phosphorus removal are inhibited and lose the biological nitrogen and phosphorus removal capability of the bacterial groups. The biological nitrogen and phosphorus removal is realized under the condition of not needing additional carbon source and adding medicine.
In another technical solution, in the sewage treatment apparatus, a first valve body 201 and a second valve body 202 are arranged on the first pipe body 2, as shown in fig. 2, the first valve body 201 is located on the left side of the second valve body 202;
the sewage treatment device further comprises:
each water inlet pipe 4 is communicated with a sludge discharge port of the sedimentation tank through the second pipe body 12, the second pipe body 12 is provided with a third valve body 121 and a water pump, and the water pump on the second pipe body 12 is positioned between the third valve body 121 and the sludge discharge port of the sedimentation tank;
and a third pipe 13 having one end connected to the second pipe 12 and located between the water pump of the second pipe 12 and the third valve 121 and the other end located between the first valve 201 and the second valve 202, wherein the third pipe 13 is provided with a fourth valve 131.
When the sludge needs thickening, the first valve body 201, the second valve body 202 and the fourth valve body 131 are closed, the third valve body 121 is opened, and the sludge enters the reactor body 1 through the water inlet pipe 4 to thicken. When the recoil is required, the third valve element 121 and the second valve element 202 are closed, and the fourth valve element 131 and the first valve element 201 are opened to perform the recoil. After the back flushing is finished, the first valve body 201, the second valve body 202 and the fourth valve body 131 are closed, the third valve body 121 is opened, and the sludge enters the reactor body 1 through the water inlet pipe 4 to continue thickening. When the activated sludge continuously grows and increases and the excess sludge needs to be discharged periodically, when the sludge needs to be discharged, the third valve body 121 and the fourth valve body 131 are closed, the first valve body 201 and the second valve body 202 are opened, the sludge is discharged, then the first valve body 201, the second valve body 202 and the fourth valve body 131 are closed, the third valve body 121 is opened, and the sludge enters the reactor body 1 through the water inlet pipe 4 to continue thickening. When in actual use, the back flushing can be carried out every four hours.
The nitrogen and phosphorus removal activated sludge thickening device for treating the sewage with low carbon-nitrogen ratio is applied to rural domestic sewage treatment engineering at the first level in the Ministry of Qinzuan, Guangxi, and proves that the novel process technology has the following characteristics from the operation condition and the operation effect of the activated sludge thickening device:
1. a thickening device (device) of nitrogen and phosphorus removal activated sludge for treating sewage with low carbon-nitrogen ratio is developed, biological floras are applied to nitrogen and phosphorus removal, and the water quality after sewage treatment reaches GB 18918-.
2. The nitrogen and phosphorus removal activated sludge thickening device (device) for treating sewage with low carbon-nitrogen ratio is applied, so that the problem that the ammonia nitrogen and phosphorus in discharged water seriously exceed standards due to the common high ammonia nitrogen and high phosphorus in rural domestic sewage at first grade of villages (towns) and villages and the unbalanced low carbon-nitrogen ratio and C/N in the sewage treated by the traditional sewage treatment process is effectively solved.
3. A nitrogen and phosphorus removal activated sludge thickening device (device) for treating sewage with low carbon-nitrogen ratio is used, a specific place for creating an environment and conditions for enriching biochemical reaction of nitrogen and phosphorus removal for biological floras is provided, and the situation that organic carbon sources (glucose and the like) are required to be added for denitrification and nitrification in the traditional sewage treatment is changed; the reactor (device) has the defects of needing to add chemicals for nitrogen and phosphorus removal, saving energy consumption and reducing the operation cost of sewage treatment, and is a high-efficiency biological nitrogen and phosphorus removal reactor (device).
4. The nitrogen and phosphorus removal activated sludge thickening device (device) for treating sewage with low carbon-nitrogen ratio is simple in structure, and is a biological treatment device capable of effectively solving the problem that high ammonia nitrogen and high phosphorus are difficult to remove in the existing rural domestic sewage treatment process. It removes ammonia nitrogen in the sewage through biological treatment, and the effect of phosphorus is showing, can regard as rural domestic sewage treatment project in, the demonstration utility model popularization technique of biological ecological treatment.
5. The activated sludge thickening device (device) for nitrogen and phosphorus removal of sewage with low carbon-nitrogen ratio, which is designed by utilizing hydraulic plug flow dynamics, is a unit assembly integrating traditional anaerobic, aerobic biochemical, sedimentation and other processes, can be manufactured into integrated equipment, saves the investment of sewage treatment engineering construction, reduces the operation cost and reduces the occupation of land area.
While embodiments of the utility model have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the utility model pertains, and further modifications may readily be made by those skilled in the art, it being understood that the utility model is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. The dephosphorization denitrification active sludge thickener for treating sewage with low carbon-nitrogen ratio is characterized by comprising the following components:
the reactor body is provided with a water outlet;
a first pipe body;
the reactor comprises a reactor body, at least one flow guide rotational flow plate, a plurality of flow guide vanes and a plurality of reaction chambers, wherein the flow guide rotational flow plate comprises a rotational flow plate main body and a plurality of flow guide vanes; when one diversion rotational flow plate is arranged, the water outlet is arranged above the diversion rotational flow plate, and the first pipe body is arranged below the diversion rotational flow plate; when the number of the flow guide rotational flow plates is multiple, the multiple flow guide rotational flow plates are arranged in the reactor body at intervals, the water outlet is arranged above the topmost flow guide rotational flow plate, and the first pipe body is arranged below the bottommost flow guide rotational flow plate;
at least one inlet tube, it is originally internal with the leading-in reactor of mud with rotatory mode, the direction of rotation of each inlet tube with the array orientation of polylith water conservancy diversion lamina membranacea is the same, and when water conservancy diversion whirl board had one, each inlet tube all set up the below at water conservancy diversion whirl board, and when water conservancy diversion whirl board had a plurality ofly, two adjacent water conservancy diversion whirl inter-plates all were provided with an at least inlet tube.
2. The dephosphorizing and denitrifying activated sludge thickener for treating sewage with low carbon-nitrogen ratio as recited in claim 1, wherein when there is one diversion cyclone plate, only one water inlet pipe is disposed below the diversion cyclone plate; when the flow guide rotational flow plates are multiple, a water inlet pipe is arranged between every two adjacent flow guide rotational flow plates.
3. The dephosphorizing and denitrifying activated sludge thickener of claim 2 for treating sewage with low carbon-nitrogen ratio, wherein said first tube is disposed at the bottom of the reactor body.
4. The dephosphorizing and denitrifying activated sludge thickener for treating sewage with a low carbon-nitrogen ratio as recited in claim 1, wherein an effluent weir is disposed in said reactor body, said effluent weir is located above the topmost diversion rotational flow plate and is spaced from the topmost diversion rotational flow plate by a certain distance, and a water outlet weir mouth of said effluent weir is communicated with said water outlet.
5. The dephosphorizing and denitrifying activated sludge thickener for treating sewage with a low carbon-nitrogen ratio as recited in claim 1, wherein said reactor body is cylindrical, said rotational flow plate main body is cylindrical, and the portion of each water inlet pipe connected to the reactor body is tangent to the reactor body.
6. The dephosphorizing and denitrifying activated sludge thickener for treating sewage with a low carbon-nitrogen ratio as recited in claim 1, wherein said flow-guiding rotational flow plate further comprises a central tube, the central tube is vertically disposed in the middle of the flow-guiding rotational flow plate, and the other end of each flow-guiding vane plate on any flow-guiding rotational flow plate is fixed on the central tube corresponding thereto.
7. The dephosphorizing and denitrifying activated sludge thickener for treating sewage with a low carbon-nitrogen ratio as recited in claim 1, wherein said guide vane plate is rectangular and has an angle of 20-30 degrees with the vertical direction.
8. The dephosphorizing and denitrifying activated sludge thickener of low carbon-nitrogen ratio sewage as claimed in claim 7, wherein vertical projections of two adjacent guide vanes on said guide cyclone plate are partially overlapped.
9. The sewage treatment apparatus using the thickener of claim 1, comprising:
a grid tank;
the hydrolysis acidification pool is connected with the grid pool;
the biological contact aerobic tank is connected with the hydrolysis acidification tank;
the sedimentation tank is connected with the biological contact aerobic tank;
the thickener comprises a thickener, wherein each water inlet pipe on the thickener is communicated with a sludge discharge port of a sedimentation tank, a water pump is arranged between each water inlet pipe and the sludge discharge port of the sedimentation tank, a water outlet of a reactor body is communicated with a water inlet of a biological contact aerobic tank, a first pipe body is communicated with the sludge discharge port of the sedimentation tank, and the water pump is arranged between the sludge discharge ports of the first pipe body and the sedimentation tank.
10. The sewage treatment apparatus using a thickener according to claim 9, wherein a first valve body and a second valve body are provided on the first pipe body;
the sewage treatment device further comprises:
each water inlet pipe is communicated with a sludge discharge port of the sedimentation tank through the second pipe body, a third valve body and a water pump are arranged on the second pipe body, and the water pump on the second pipe body is positioned between the third valve body and the sludge discharge port of the sedimentation tank;
and one end of the third pipe body is communicated with the second pipe body and is positioned between the water pump on the second pipe body and the third valve body, the other end of the third pipe body is positioned between the first valve body and the second valve body, and the third pipe body is provided with a fourth valve body.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11976246B1 (en) * | 2023-02-10 | 2024-05-07 | Conversion Energy Systems, Inc. | Thermal conversion of plastic waste into energy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11976246B1 (en) * | 2023-02-10 | 2024-05-07 | Conversion Energy Systems, Inc. | Thermal conversion of plastic waste into energy |
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