A sewage treatment biochemical reaction tank

Abstract

The application provides a sewage treatment biochemical reaction tank, and relates to the technical field of sewage treatment, which comprises a biochemical tank, wherein the biochemical tank is communicated with a water distribution tank, a plurality of filter material oxidation units are arranged in the biochemical tank, adjacent filter material oxidation units are communicated, sewage enters from one end of the biochemical tank, sequentially passes through a plurality of adjacent filter material oxidation units, and finally enters a sedimentation tank, the filter material oxidation unit comprises a filter material bin and an oxidation tank, the filter material bin is filled with granular calcium carbonate dephosphorization filter material so as to remove phosphate ions in sewage, an aeration pipe is arranged below the oxidation tank, a plurality of aeration holes are formed in the aeration pipe, a curtain type filler is arranged above the aeration pipe, and the curtain type filler is attached with an aerobic microbial membrane; the filter material bin is arranged adjacent to the oxidation tank, and the oxidation tank is communicated with the filter material bin. The application has the advantages of high dephosphorization and denitrification efficiency and good sewage treatment effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to a sewage treatment biochemical reaction tank. BACKGROUND

[0002] In sewage treatment, the removal of nitrogen and phosphorus is an important link, and the nitrification process and denitrification process are often used for biological denitrification, and finally the nitrogen in the sewage is removed in the form of gaseous nitrogen.

[0003] The existing phosphorus removal process mainly includes chemical phosphorus removal and biological phosphorus removal. Chemical phosphorus removal generally uses chemical flocculation and precipitation to remove phosphorus, so that the phosphate ions in the sewage react chemically to form insoluble phosphate salt and precipitate in sludge, thereby removing phosphorus in the sewage. Biological phosphorus removal generally uses polyphosphorus bacteria to absorb phosphorus in the sewage in an aerobic environment, thereby removing phosphorus in the sewage.

[0004] At present, in small-scale sewage treatment, the removal of phosphorus mainly relies on adding chemical agents to the sewage, and the chemical agents and phosphate ions in the sewage react chemically to form insoluble phosphate salt and precipitate in sludge. However, small-scale sewage treatment equipment and sewage treatment process are relatively simple, and most of them are operated in an unattended manner. Using traditional chemical agents for denitrification and phosphorus removal is cumbersome and has high operating costs.

[0005] In addition, most of the existing sewage treatment equipment removes ammonia nitrogen, and a small part of the sewage treatment equipment removes phosphate ions. The sewage treatment time is relatively long, and the sewage treatment effect is poor. Therefore, there is an urgent need in the art for a sewage treatment biochemical reaction tank with high denitrification and phosphorus removal efficiency and good sewage treatment effect. SUMMARY

[0006] The purpose of the present application is to provide a sewage treatment biochemical reaction tank.

[0007] The embodiments of the present application are implemented as follows:

[0008] The present application provides a kind of sewage treatment biochemical reaction pool, comprising: biochemical pool, the biochemical pool is connected with water distribution pool, multiple filter material oxidation units are provided in the biochemical pool;Adjacent the filter material oxidation unit is connected;Sewage enters from one end of the biochemical pool, sequentially through multiple adjacent filter material oxidation units, finally enters sedimentation tank;The filter material oxidation unit includes filter material bin and oxidation pool, the filter material bin is filled with granular calcium carbonate dephosphorization filter material, so as to remove phosphate ion in sewage;The lower portion of the oxidation pool is provided with an aeration pipe, a plurality of aeration holes are formed on the aeration pipe, the upper portion of the aeration pipe is provided with a curtain type filler, and the curtain type filler is attached with aerobic microbial membrane;The filter material bin is adjacent to the oxidation pool, and the oxidation pool is connected with the filter material bin.

[0009] In a preferred embodiment of the present application, the biochemical pool comprises a first biochemical pool and a second biochemical pool;A plurality of first filter material oxidation units are provided in the first biochemical pool, the first filter material oxidation units are adjacent to each other, and each first filter material oxidation unit comprises a first filter material bin and a first oxidation pool, the first filter material bin and the first oxidation pool are alternately arranged;Sewage flows from the upstream end of the first biochemical pool, sequentially passes through multiple first filter material oxidation units, and finally flows into a first sedimentation tank;The second biochemical pool is connected with the water distribution pool, and the second biochemical pool is evenly distributed with porous calcium carbonate filter material, multiple second oxidation pools are inserted into the second biochemical pool, and the second oxidation pools are connected with the second biochemical pool;Sewage flows from the upstream end of the second biochemical pool, sequentially passes through the second filter material bin and the second oxidation pool, and finally flows into a second sedimentation tank.

[0010] In a preferred embodiment of the present application, the first biochemical pool and the second biochemical pool exist in the same sewage treatment biochemical reaction pool simultaneously, or any one of the first biochemical pool and the second biochemical pool exists in the sewage treatment biochemical reaction pool.

[0011] In a preferred embodiment of the present application, the abutting walls of the first filter material bin and the first oxidation pool are made of glass steel grid;The first filter material bin and the first oxidation pool adjacent to each other are connected through the grid holes of the glass steel grid.

[0012] In a preferred embodiment of the present application, the bottom of the first oxidation pool is provided with a first aeration pipe, and the first aeration pipe is densely distributed with multiple first aeration holes;The first aeration pipe is connected with a fan, and the lower portion of the first aeration pipe is provided with a first sludge discharge pipe.

[0013] In a preferred embodiment of the present application, the upper portion of the first aeration pipe is provided with a hanger, the hanger is fixedly arranged on the glass steel grid, and the first curtain type filler is hung on the hanger.

[0014] In a preferred embodiment of the present application, the second oxidation tank is arranged in a top-open cavity structure formed by sequentially connecting glass steels end to end; the glass steels are densely provided with water passing through holes so that the sewage can smoothly pass through the water passing through holes into the second oxidation tank or the sewage in the second oxidation tank can smoothly flow out to the second filter material bin.

[0015] In a preferred embodiment of the present application, the second filter material bin is arranged in the second biochemical tank to remove part of the second biochemical tank; the second oxidation tank is uniformly and punctiformally inserted into the second biochemical tank.

[0016] In a preferred embodiment of the present application, the first sedimentation tank is arranged adjacent to the first oxidation tank, and the first sedimentation tank and the first oxidation tank are arranged apart by a flower wall; the flower wall is provided with a plurality of water outlets in a lower space, and the treated sewage enters the first sedimentation tank through the water outlets.

[0017] In a preferred embodiment of the present application, the second oxidation tank is provided with a second curtain type filler, and the second curtain type filler is provided with a second aeration pipe below; the second aeration pipe is connected to a fan, and the second aeration pipe is provided with a second sludge discharge pipe below.

[0018] The present application has the following beneficial effects:

[0019] 1. The first biochemical tank is connected to a water distribution tank, and the first biochemical tank is provided with a plurality of filter material oxidation units alternately distributed in multiple stages; the filter material oxidation units are arranged adjacent to each other, and the filter material oxidation unit comprises a first filter material bin and a first oxidation tank; the first oxidation tank is arranged adjacent to the first filter material bin, and the first oxidation tank is connected to the first filter material bin; the first filter material bin is filled with a large amount of granular calcium carbonate dephosphorization filter material; the phosphate ions in the sewage react with the calcium carbonate to generate water-insoluble calcium phosphate precipitate, and at the same time, the carbonate ions are displaced; the carbonate ions flow into the first oxidation tank with the sewage, and the carbonate ions are absorbed and utilized by the aerobic nitrifying bacteria as inorganic carbon source; the multiple filter material oxidation units are arranged adjacent to each other, so as to promote and enhance each other for denitrification and dephosphorization, and the denitrification and dephosphorization efficiency is high, and the sewage treatment effect is good.

[0020] 2. The first filter material bin is in an anaerobic environment, and the surface of the granular calcium carbonate dephosphorization filter material filled in the first filter material bin is attached with anaerobic denitrifying bacteria film; the sewage flows through the first filter material bin and the first oxidation tank alternately distributed in multiple stages, so as to promote and enhance each other for nitrification and denitrification.

[0021] 3. The second biochemical tank is connected with the water distribution tank, a plurality of second oxidation tanks are distributed in the second biochemical tank in an inserted mode, a second aeration pipe is arranged below the second oxidation tank, the second aeration pipe provides an aerobic environment for the second oxidation tank, the second oxidation tank is connected with the second biochemical tank, a second filter material bin is arranged around the second oxidation tank, the second filter material bin is only separated from the second oxidation tank by a tank wall of the second oxidation tank, the tank wall is made of glass steel, the glass steel is densely covered with water passing through holes, which is beneficial to the inflow and outflow of sewage, so that the nitrification reaction and the denitrification reaction are promoted and enhanced, and the treatment effect of the sewage is improved, and the efficiency of denitrification and phosphorus removal is improved;

[0022] 4. The first filter material bin is filled with a large amount of granular calcium carbonate phosphorus removal filter material, so that calcium carbonate in the granular calcium carbonate phosphorus removal filter material reacts with phosphate ions in the sewage to generate water-insoluble calcium phosphate precipitate, the sewage is weakly alkaline, the calcium phosphate precipitate is attached to the surface of the granular calcium carbonate phosphorus removal filter material or precipitates to the bottom of the bin body of the first filter material bin and is discharged together with sludge, so as to achieve the purpose of removing phosphorus from the sewage. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of a sewage treatment biochemical reaction tank of the present application;

[0025] Figure 2 It is a sectional view of a first biochemical tank of a sewage treatment biochemical reaction tank of the present application;

[0026] Figure 3 It is a sectional view of a second biochemical tank of a sewage treatment biochemical reaction tank of the present application;

[0027] Figure 4 It is a schematic diagram of a first water distribution pipe of a sewage treatment biochemical reaction tank of the present application;

[0028] Figure 5 It is a schematic diagram of a glass steel structure of a second oxidation tank of a sewage treatment biochemical reaction tank of the present application;

[0029] Figure 6 It is a schematic diagram of a sedimentation tank flower wall structure of a sewage treatment biochemical reaction tank of the present application.

[0030] BRIEF DESCRIPTION OF DRAWINGS

[0031] 1, first biochemical pool; 2, second biochemical pool; 3, adjusting pool; 4, anaerobic pool; 5, water distribution pool; 6, second sedimentation pool; 7, first sedimentation pool; 8, first oxidation pool; 9, first filter material bin; 10, flower wall; 11, first water distribution pipe; 12, second water distribution pipe; 13, second oxidation pool; 14, first curtain type filler; 15, first aeration pipe; 16, first sludge discharge pipe; 17, hanging rack; 18, second curtain type filler; 19, second aeration pipe; 20, second sludge discharge pipe; 21, first water distribution hole; 22, glass steel; 23, water passing through hole; 24, water outlet hole; 25, sludge thickening pool. DETAILED DESCRIPTION

[0032] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the drawings of the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0034] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical", and the like, do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0037] In the description of the present application, it should be further pointed out that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] The present application provides a sewage treatment biochemical reaction tank to solve the technical problems of long sewage treatment time, poor sewage treatment effect and low nitrogen and phosphorus removal efficiency of the existing sewage treatment equipment. Therefore, the present application provides the following specific embodiments.

[0039] The present embodiment provides a sewage treatment biochemical reaction tank, referring to Figures 1 to 6 , comprising a biochemical tank, the biochemical tank is communicated with a water distribution tank, a plurality of filter material oxidation units are arranged in the biochemical tank, the filter material oxidation unit comprises a filter material bin and an oxidation tank, the filter material bin is arranged adjacent to the oxidation tank, and the oxidation tank is communicated with the filter material bin; a plurality of through holes are formed in the abutting wall between the filter material bin and the oxidation tank, so that the sewage can flow smoothly between the filter material bin and the oxidation tank, the filter material bin is arranged at the front end of the oxidation tank, and the filter material bin is filled with granular calcium carbonate phosphorus removal filter material.

[0040] The chemical reaction of the sewage in the filter material bin is as follows:

[0041] CaCO3+2PO4 3- →Ca3(PO4)2+CO3 2-

[0042] The hydrolysis chemical reaction formula of carbonate ions is as follows:

[0043] CO3 2- +H2O→HCO3 - +H -

[0044] The chemical reaction formula of the oxidation tank is as follows:

[0045] NH4 + +O2+HCO3 - →C5H7O2N+NO3 - +H2O+H2CO3

[0046] According to the reaction equilibrium principle of the above chemical reaction, the phosphorus removal reaction of the sewage in the filter material bin continuously generates calcium phosphate precipitate, and the phosphorus removal is completed; at the same time, carbonate ions are continuously generated, and the carbonate ions enter the oxidation tank with the water flow to be absorbed and utilized by nitrifying bacteria for nitrification. The phosphorus removal process continuously generates carbonate ions to provide sufficient inorganic carbon source for the nitrification reaction, and the high-concentration inorganic carbon source effectively promotes the efficient nitrification. At the same time, the continuous consumption of carbonate ions by nitrification reduces the concentration of carbonate ions in the filter material bin; from the perspective of chemical equilibrium, the chemical reaction of the phosphorus removal process continuously moves towards the generation of calcium phosphate and carbonate ions, thereby improving the phosphorus removal effect; in addition, the continuously generated carbonate ions also improve and maintain the concentration of the nitrification reaction reactants, thereby accelerating the nitrification reaction, and further promoting and enhancing the effects of denitrification and phosphorus removal.

[0047] A plurality of filter material oxidation units are arranged in series, and adjacent filter material oxidation units are connected.

[0048] A plurality of aeration holes are formed in the aeration pipe to provide necessary oxygen sources for the growth and reproduction of aerobic nitrosation bacteria and nitrifying bacteria in the oxidation tank. The environment in the filter material bin is anaerobic, which is beneficial to the growth and reproduction of anaerobic denitrifying bacteria. The surface of the granular calcium carbonate phosphorus removal filter material filled in the filter material bin is attached with an anaerobic bacteria film to promote the denitrification process.

[0049] A plurality of filter material bins and a plurality of oxidation tanks are alternately and serially arranged to form a multi-stage alternating promotion of aerobic and anaerobic bacteria, which promotes and enhances the effects of phosphorus removal and denitrification, thereby improving the efficiency of denitrification and phosphorus removal and the effect of sewage denitrification and phosphorus removal.

[0050] A curtain filler is arranged above the aeration pipe, and an aerobic microbial film is attached to the curtain filler. The curtain filler is made of a polyethylene central rope with aldehyde fiber silk flower clusters hung around the periphery, which is tied to a hanging rack. The curtain filler has a large specific surface area and is easy to generate more microbial film attachment space, thereby effectively improving the efficiency of the nitrification reaction.

[0051] The biochemical tank includes a first biochemical tank 1 and a second biochemical tank 2. Figure 1 、 Figure 2 and Figure 3The first biochemical tank 1 is connected with the water distribution tank 5, and a plurality of groups of filter material oxidation units are arranged in the first biochemical tank 1 in an alternating distribution manner; the filter material oxidation unit comprises a first filter material bin 9 and a first oxidation tank 8, and a plurality of groups of filter material oxidation units are arranged in the first biochemical tank 1 in an alternating distribution manner; sewage flows into the first biochemical tank 1 from an upstream end thereof, sequentially passes through the plurality of groups of filter material oxidation units in an alternating distribution manner, and finally flows into the first sedimentation tank 7.

[0052] The first filter material bin 9 is filled with a large amount of granular calcium carbonate dephosphorization filter material, and the granular calcium carbonate dephosphorization filter material has the characteristics of porosity and large specific surface area; when the sewage flows through the first filter material bin 9, the sewage presents weak alkalinity, and calcium carbonate reacts with phosphate ions in the sewage to generate calcium phosphate precipitates which are insoluble in water; the calcium phosphate precipitates are attached to the surface of the filter material or precipitate to the bottom of the bin body of the first filter material bin 9 and are discharged together with sludge, so that the purpose of dephosphorization of the sewage is achieved.

[0053] The concentration of the reactant carbonate ions in the first oxidation tank 8 is continuously increased, and the concentration of the phosphate ions in the first filter material bin is continuously reduced, so as to promote the movement of the chemical reaction equilibrium; the continuously released carbonate ions in the dephosphorization process can accelerate the efficiency of the nitrification reaction, so as to accelerate the consumption of the carbonate ions, the replacement reaction of calcium carbonate and phosphate ions generates calcium phosphate precipitates, and the purpose of mutual promotion and mutual efficiency of the denitrification and dephosphorization processes is achieved.

[0054] The carbonate ions enter the first oxidation tank 8 along with the flow of the sewage, and the carbonate ions are absorbed and utilized by the aerobic nitrifying bacteria as inorganic carbon sources, participate in the construction of the biological body of the aerobic nitrifying bacteria, convert the ammonium nitrogen in the sewage into nitrate nitrogen, unify and coordinate the denitrification and dephosphorization, and achieve the purpose of mutual promotion and efficiency.

[0055] A plurality of groups of filter material oxidation units are arranged in the first biochemical tank 1 in an alternating distribution manner, and the sewage sequentially flows through the plurality of groups of filter material oxidation units in an alternating distribution manner; that is, the sewage sequentially passes through the first filter material bin 9 and the first oxidation tank 8, so that the denitrification and dephosphorization in the sewage treatment are coordinated, the denitrification and dephosphorization in the sewage treatment are mutually promoted, the denitrification and dephosphorization efficiency is high, and the sewage treatment effect is good.

[0056] The upstream of the present application refers to the upper section in the flow direction of the sewage, and the source starting point of the flow of the sewage in the first biochemical tank.

[0057] The first filter bin 9 is spaced apart from the first oxidation tank 8, the abutting walls of the first filter bin 9 and the first oxidation tank 8 adjacent to each other are made of a glass steel grid, the glass steel grid is arranged with grid holes, the first filter bin 9 and the first oxidation tank 8 adjacent to each other are communicated through the grid holes, so that the sewage flows smoothly between the first filter bin 9 and the first oxidation tank 8, and the denitrification process and the phosphorus removal process in the sewage treatment process promote and enhance each other.

[0058] The first biochemical tank 1 not only promotes and enhances the denitrification and phosphorus removal processes, but also alternately spaces the first filter bin 9 and the first oxidation tank 8 to promote and enhance the nitrification and denitrification reactions, thereby improving the sewage treatment effect and the efficiency of denitrification and phosphorus removal.

[0059] The first biochemical tank 1 is provided with a first water distribution pipe 11, referring to Figure 4 The first water distribution pipe 11 is communicated with a lifting pump through a connecting pipe, the first water distribution pipe 11 is arranged in the first filter bin 9 upstream of the first biochemical tank 1, so that the water flows through the first filter bin 9 and the first oxidation tank 8 spaced apart in sequence, and the denitrification and phosphorus removal processes promote and enhance each other, thereby improving the efficiency of denitrification and phosphorus removal.

[0060] The first water distribution pipe 11 is distributed with a plurality of first water distribution holes 21, and the sewage flows from the first water distribution holes 21 to the first filter bin 9 upstream.

[0061] The bottom of the first oxidation tank 8 is provided with a first aeration pipe 15, the first aeration pipe 15 is densely distributed with a plurality of first aeration holes, and the first aeration pipe 15 is communicated with a fan; the first aeration pipe 15 provides necessary oxygen for the first oxidation tank 8.

[0062] The fan adopts a Roots blower, the Roots blower runs stably and reliably, has high mechanical efficiency, and is convenient to maintain and maintain.

[0063] The first aeration pipe 15 is provided with a hanger 17 above, the hanger 17 is fixedly arranged on the glass steel grid, the first curtain type filler 14 is hung on the hanger 17, the first curtain type filler 14 adopts a curtain type soft filler, the curtain type soft filler is used to make a first oxidation tank aerobic microbial bed, and the first curtain type filler 14 is hung on the hanger 17 to provide an attachment environment for aerobic bacteria and facilitate the generation of more bacterial film attachment space.

[0064] The first aeration pipe 15 is provided below with a first sludge discharge pipe 16 which collects inorganic precipitates such as sludge and mud to prevent excessive sludge from blocking the first aeration pipe 15; compared with the prior art sewage treatment equipment, the organic pollutant removal rate of the sludge treated by the present application is higher.

[0065] The treated sewage enters the first sedimentation tank 7 which is in communication with the last-stage alternately distributed filter material oxidation units; specifically, the first sedimentation tank 7 is provided adjacent to the first oxidation tank 8, and the first sedimentation tank 7 and the first oxidation tank 8 are spaced apart by a flower wall 10, referring to Figure 6 , the lower space of the flower wall 10 is distributed with a plurality of water outlets 24, and the treated sewage enters the first sedimentation tank 7 through the water outlets 24.

[0066] The flower wall 10 is provided as a steel concrete structure integrally cast with the biochemical reaction tank, the lower space of the flower wall 10 is distributed with a plurality of water outlets 24, and the water outlets 24 are provided with UPVC pipes which have stronger corrosion resistance than traditional cast iron pipes.

[0067] The second biochemical tank 2 is in communication with the distribution tank 5, referring to Figure 1 and Figure 3 , the second biochemical tank 2 is uniformly distributed with porous calcium carbonate filter material, and the second biochemical tank 2 is inserted with a plurality of second oxidation tanks 13 which are in communication with the second biochemical tank 2 so that the second oxidation tanks 13 and the second filter material bins are alternately distributed; sewage flows into the second biochemical tank 2 from the upstream end, sequentially passes through the second filter material bin 9 and the second oxidation tank 13, and finally flows into the second sedimentation tank 6.

[0068] The second filter material bin is provided as the part of the second biochemical tank 2 except the second oxidation tank 13; the second oxidation tank 13 is uniformly inserted in the second biochemical tank 2 in a dotted manner, and the second filter material bin is filled with a large amount of granular calcium carbonate dephosphorization filter material; the granular calcium carbonate dephosphorization filter material releases carbonate ions while dephosphorizing, thereby providing inorganic carbon source for the reproduction, growth and metabolism of nitrosation bacteria and nitrification bacteria.

[0069] The granular calcium carbonate dephosphorization filter material has the characteristics of porosity and large specific surface area, and has the function of attaching microbial biofilm, which is beneficial to the growth and reproduction of microorganisms; the calcium carbonate in the granular calcium carbonate dephosphorization filter material reacts with phosphate ions in water to generate calcium carbonate precipitates which are difficult to dissolve in water, thereby completing the dephosphorization treatment of sewage; at the same time, carbonate ions are generated to supplement inorganic carbon source for the reproduction and growth of nitrosation bacteria and nitrification bacteria; the denitrification process and the dephosphorization process promote and enhance each other, thereby improving the efficiency of sewage treatment and achieving better sewage treatment effect.

[0070] The second biochemical tank 2 not only promotes and enhances the denitrification and phosphorus removal processes; the second filter bin is mostly an anaerobic environment, and the granular calcium carbonate phosphorus removal filter material provided in the second filter bin has a large number of microbial membranes attached thereto, which provides a good environment for the growth and reproduction of anaerobic denitrifying bacteria, is conducive to generating more microbial attachment space, and promotes the denitrification reaction; the second oxidation tank 13 is mostly an aerobic environment, and the alternately spaced second filter bin and the second oxidation tank 13 promote and enhance the nitrification and denitrification reactions; thereby improving the treatment effect of the wastewater and the efficiency of denitrification and phosphorus removal.

[0071] The second oxidation tank 13 is uniformly distributed in the second biochemical tank 2 in a point-like insertion mode, that is, the second oxidation tank 13 is arranged inside the second biochemical tank 2, that is, the second oxidation tank 13 is surrounded by the second filter bin, and the second oxidation tank 13 is surrounded by the granular carbonate filter material, and the second biochemical tank 2 is uniformly distributed with multiple groups of the second oxidation tank 13, so that when the wastewater flows through the second biochemical tank 2, the phosphorus removal process and the denitrification process promote and enhance each other, thereby improving the effect of wastewater treatment.

[0072] The second oxidation tank 13 is arranged in a top-open cavity structure formed by sequentially connecting glass steels 22 at the head and tail, the glass steels 22 are densely provided with water passing holes 23, and the second oxidation tank 13 is arranged in a top-open cavity structure formed by sequentially connecting glass steels 22 at the head and tail. Figure 5 so that the wastewater smoothly enters the second oxidation tank 13 through the water passing holes 23, or the wastewater in the second oxidation tank 13 smoothly flows out to the second filter bin.

[0073] Preferably, the second oxidation tank 13 can also be formed by sequentially connecting high molecular materials or metal materials at the head and tail to form a top-open cavity structure, and in the specific embodiment, the second oxidation tank 13 is sequentially connected by glass steels at the head and tail, so that the wastewater in the second oxidation tank 13 smoothly flows out to the second filter bin.

[0074] The second oxidation tank 13 is provided with a second curtain type filler 18, and the second curtain type filler 18 is hung on the hanging rack of the second oxidation tank 13; the second curtain type filler 18 is arranged as a curtain type soft filler, which is used to make a good oxygen microbial bed for the second oxidation tank 13, to provide an attachment environment for aerobic bacteria and facilitate the generation of more microbial membrane attachment space.

[0075] The second curtain type filler 18 is provided with a second aeration pipe 19 below, and the second aeration pipe 19 is densely provided with second aeration holes; the second oxidation tank 13 flows air through the second aeration holes, to provide necessary oxygen sources for the aerobic nitrifying bacteria in the second oxidation tank 13.

[0076] The second aeration pipe 19 is communicated with a fan, and the fan is a Roots fan.

[0077] The second aeration pipe 19 is communicated with a fan, and the fan is a Roots fan, which is stable and reliable in operation, high in mechanical efficiency, and convenient to maintain.

[0078] The first sludge discharge pipe 16 and the second sludge discharge pipe 20 are respectively communicated with the sludge concentration tank 25, and the sludge in the first sludge discharge pipe 16 and the second sludge discharge pipe 20 is sucked into the sludge concentration tank 25, and the sludge in the sludge concentration tank 25 is discharged through a sludge connection pipe after concentration.

[0079] The wastewater flows through the adjusting tank 3 to the anaerobic tank 4, and the wastewater is subjected to an anaerobic chemical reaction in the anaerobic tank 4 to reduce the chemical oxygen demand of the wastewater, that is, the amount of oxygen consumed by the biochemical degradation of the organic matter in the wastewater; the content of the organic matter in the wastewater is preliminarily reduced, and the oxidation reaction in the oxidation tank reduces the consumption of oxygen, thereby improving the effect of wastewater treatment.

[0080] The first biochemical tank 1 and the second biochemical tank 2 exist in the same wastewater treatment biochemical reaction tank, and when the wastewater treatment capacity is large, two parallel wastewater treatment tanks are needed to improve the efficiency of wastewater treatment.

[0081] Alternatively, any one of the first biochemical tank 1 and the second biochemical tank 2 exists in the wastewater treatment biochemical reaction tank, and when the wastewater treatment capacity is not large, the wastewater treatment biochemical reaction tank adopts any one of the first biochemical tank 1 and the second biochemical tank 2, and the same wastewater treatment effect can also be achieved, and the construction cost of one biochemical tank is lower than that of two biochemical tanks, thereby saving resources.

[0082] The anaerobic tank is communicated with the water distribution tank 5, and the wastewater subjected to anaerobic treatment flows to the water distribution tank 5.

[0083] The water distribution tank 5 is provided with a lifting pump, and the lifting pump is communicated with a connection pipeline; the connection pipeline is respectively communicated with the first water distribution pipe 11 and / or the second water distribution pipe 12, and the wastewater in the water distribution tank is sucked into the first biochemical tank 1 and / or the second biochemical tank 2.

[0084] The above merely describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wastewater treatment biochemical reaction tank, characterized in that, include: The biochemical tank is connected to the water distribution tank (5). The biochemical tank is equipped with multiple filter media oxidation units, and the adjacent filter media oxidation units are connected. Wastewater flows in from one end of the biological treatment tank, passes through multiple adjacent filter media oxidation units in sequence, and finally enters the sedimentation tank; The filter media oxidation unit includes a filter media bin and an oxidation tank. The filter media bin is filled with granular calcium carbonate dephosphorization filter media, which reacts chemically with phosphate ions in wastewater to generate calcium phosphate precipitate to remove phosphorus, and simultaneously releases carbonate ions. An aeration pipe is installed below the oxidation tank, and multiple aeration holes are opened on the aeration pipe to provide oxygen for the nitrification reaction. A curtain-type packing is installed above the aeration pipe, and an aerobic microbial biofilm is attached to the curtain-type packing. The filter media bin is arranged adjacent to the oxidation tank, and the oxidation tank is connected to the filter media bin. It is used to receive carbonate ions that migrate from the filter media bin. The carbonate ions are used as an inorganic carbon source by nitrifying bacteria in the oxidation tank to participate in the nitrification reaction and convert ammonia nitrogen into nitrate nitrogen. The nitration reaction reduces the concentration of carbonate ions in the system by consuming them, thus promoting the reaction between calcium carbonate and phosphate ions in the filter media bin towards the formation of calcium phosphate precipitate, thereby promoting the denitrification process to the phosphorus removal process. At the same time, the carbonate ions continuously released during the phosphorus removal process provide a stable inorganic carbon source for the nitration reaction, thereby promoting the denitrification process to the phosphorus removal process, forming a synergistic effect of mutual enhancement between denitrification and phosphorus removal. The biochemical tank includes a first biochemical tank (1) and a second biochemical tank (2); the first biochemical tank (1) is provided with a plurality of adjacent first filter material oxidation units, the first filter material oxidation unit includes a first filter material bin (9) and a first oxidation tank (8), the first filter material bin (9) and the first oxidation tank (8) are alternately arranged; Wastewater flows in from the upstream end of the first biological treatment tank (1), passes through multiple first filter media oxidation units in sequence, and finally flows into the first sedimentation tank (7). The second biochemical tank (2) is connected to the water distribution tank (5). The second biochemical tank (2) is evenly distributed with porous calcium carbonate filter media. Multiple second oxidation tanks (13) are inserted into the second biochemical tank (2). The second oxidation tanks (13) are connected to the second biochemical tank (2). The second filter media bin is configured as a second biochemical tank (2) excluding the second oxidation tank (13); the second oxidation tank (13) is evenly distributed in a dotted pattern within the second biochemical tank (2); Wastewater flows in from the upstream end of the second biological treatment tank (2), passes through the second filter media bin and the second oxidation tank (13) in sequence, and finally flows into the second sedimentation tank (6).

2. The wastewater treatment biochemical reaction tank according to claim 1, characterized in that: The adjacent wall between the first filter media bin (9) and the first oxidation tank (8) is made of fiberglass grating; The first filter media bin (9) and the first oxidation tank (8) are connected by the grid holes of the fiberglass grating.

3. The wastewater treatment biochemical reaction tank according to claim 2, characterized in that: The bottom of the first oxidation tank (8) is provided with a first aeration pipe (15), and the first aeration pipe (15) is densely covered with multiple first aeration holes; The first aeration pipe (15) is connected to the blower, and a first sludge discharge pipe (16) is provided below the first aeration pipe (15).

4. A wastewater treatment biochemical reaction tank according to claim 3, characterized in that: A bracket (17) is provided above the first aeration pipe (15). The bracket (17) is fixedly installed on the fiberglass grating, and a first curtain packing (14) is hung on the bracket (17).

5. A wastewater treatment biochemical reaction tank according to claim 1, characterized in that: The second oxidation tank (13) is configured as a cavity structure with an open top, formed by sequentially splicing together fiberglass (22); The fiberglass (22) is densely covered with water passage holes (23) so that sewage can smoothly enter the second oxidation tank (13) through the water passage holes (23), or the sewage in the second oxidation tank (13) can smoothly flow out to the second filter media bin.

6. A wastewater treatment biochemical reaction tank according to claim 1, characterized in that: The first sedimentation tank (7) and the first oxidation tank (8) are arranged adjacent to each other, and the first sedimentation tank (7) and the first oxidation tank (8) are separated by a flower wall (10); The lower part of the flower wall (10) has multiple water outlet holes (24), and the treated sewage enters the first sedimentation tank (7) through the water outlet holes (24).

7. A wastewater treatment biochemical reaction tank according to claim 1, characterized in that: The second oxidation tank (13) is provided with a second curtain packing (18), and a second aeration pipe (19) is provided below the second curtain packing (18). The second aeration pipe (19) is connected to the blower, and a second sludge pipe (20) is provided below the second aeration pipe (19).

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