CN211056911U - Sewage nitrogen and phosphorus removal integrated treatment system - Google Patents
Sewage nitrogen and phosphorus removal integrated treatment system Download PDFInfo
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- CN211056911U CN211056911U CN201921974333.9U CN201921974333U CN211056911U CN 211056911 U CN211056911 U CN 211056911U CN 201921974333 U CN201921974333 U CN 201921974333U CN 211056911 U CN211056911 U CN 211056911U
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Abstract
The utility model discloses a sewage nitrogen and phosphorus removal integration processing system, a serial communication port, including anaerobic zone, anoxic zone, good oxygen district, flocculation district, horizontal pipe settling zone, sand filtration district, advanced oxidation degree of depth treatment district and the ditch of going out of once intercommunication, anaerobic zone intercommunication has the side stream to remove the phosphorus district, the side stream removes phosphorus district and good oxygen district intercommunication, horizontal pipe settling zone intercommunication has the mud district of storage, anaerobic zone and anoxic zone all with store up mud district intercommunication. The system realizes the enhanced nitrogen and phosphorus removal advanced treatment of sewage by synchronously carrying out nitrification and denitrification nitrogen removal processes, induced crystallization phosphorus removal, sludge multi-point backflow and ultraviolet hydrogen peroxide advanced oxidation in a micro-aerobic environment through a biological membrane system and removing odor substances by using active carbon.
Description
Technical Field
The utility model relates to a sewage treatment field, concretely relates to sewage nitrogen and phosphorus removal integration processing system.
Background
The thirteen-five planning provides a historical task of integrating development around cities and countries and deeply promoting new rural construction, and points out that the rural sewage treatment and toilet change force needs to be increased, and the rural human residence environment improvement is comprehensively promoted. Along with the rapid improvement of the living standard of the residents in villages and towns in China, the discharge of the domestic sewage in the villages and the towns is continuously increased. Most villages and towns lack perfect drainage channels and sewage treatment systems, and domestic sewage discharged randomly causes serious pollution to the ecological environment of the villages and towns, so that not only is groundwater seriously threatened, but also nitrogen and phosphorus eutrophication of lakes is caused, even black and odorous water bodies are possibly generated, and odor pollution is possibly caused by water body eutrophication. Therefore, the strengthening of the treatment of the domestic sewage of villages and towns is very urgent.
Aiming at the pollution problem caused by direct discharge of dispersed domestic sewage which cannot be collected and treated by a city centralized pipe network, research and attempt on related integrated equipment have been made at home and abroad. Among them, especially, the integrated domestic sewage treatment apparatus, which is the fastest growing speed, typically represents the purification tank technology of japan, the activator ecosystem of the uk, the on-site treatment system of the usa, and the like. However, these treatment systems have low treatment efficiency and large floor space, and cannot perform advanced nitrogen and phosphorus removal treatment on sewage.
Disclosure of Invention
In order to solve the problem, the utility model discloses a sewage nitrogen and phosphorus removal integration processing system, this system pass through biofilm system under the micro-aerobic environment synchronous nitrification and denitrification process, induced crystallization dephosphorization, mud multiple spot backward flow, ultraviolet hydrogen peroxide advanced oxidation even use the active carbon to get rid of smelly material and realize the intensive nitrogen and phosphorus removal advanced treatment to sewage.
The utility model provides a sewage nitrogen and phosphorus removal integration processing system, includes anaerobic zone, anoxic zone, good oxygen district, flocculation district, horizontal pipe settling zone, sand filtration district, advanced oxidation advanced treatment district and the ditch of going out of once intercommunication, anaerobic zone intercommunication has the side stream to remove the phosphorus district, the side stream removes phosphorus district and good oxygen district intercommunication, horizontal pipe settling zone intercommunication has the mud storage district, anaerobic zone and anoxic zone all communicate with the mud storage district.
Preferably, a peristaltic pump is arranged in the anaerobic zone and is communicated with the side-flow phosphorus removal zone through a side-flow pipeline.
Preferably, a sludge reflux pump is arranged in the sludge storage area.
Preferably, the anoxic zone and the aerobic zone are filled with porous flow-off spherical carrier filler.
Preferably, the flocculation area is provided with a dosing pipeline for adding the polymeric magnesium chloride and the chitosan composite flocculant.
Preferably, the sand filtration area is provided with a back washing device.
Preferably, the inside of the advanced oxidation advanced treatment zone is provided with an ultraviolet lamp tube and a dosing tube, and the bottom of the advanced oxidation advanced treatment zone is provided with a stirrer.
Preferably, the number of the ultraviolet lamp tubes is 7, each ultraviolet lamp tube has a power of 250W, and the dosing tube is provided with 5 medicine outlets.
Preferably, both the anaerobic zone and the anoxic zone are provided with stirrers.
Preferably, aeration devices are arranged in the aerobic zone and the side-stream phosphorus removal zone.
The utility model has the advantages that:
1. porous flow separation spherical carrier filler is filled in the anoxic zone and the aerobic zone to form a biological membrane system, and the effects of sludge in-situ reduction and high-efficiency denitrification are achieved through the biological membrane system. Research shows that the porous spherical shell can generate water flow effect to form a flow separation phenomenon during stirring, and suspended matters in a liquid phase can be gathered to a region with slower flow speed when the flow speed of a fluid is different; the flow separation filler enables the mixed liquid suspended substances to gradually migrate and accumulate to the interior of the filler and be trapped on the surface of the filler in the flow separation ball; the accumulated activated sludge takes the polyurethane and fiber ball filler inside as a carrier, and is adsorbed on the surface of the carrier to gradually grow to form a biological film, and the operation is stable.
2. The return sludge is added in two points, the amount of the return sludge added into the anaerobic section is reduced, so that nitrate and dissolved oxygen entering the anaerobic section are reduced, and the rest return sludge flows back to the anoxic section to ensure the requirement of nitrogen.
3. And the side-stream phosphorus removal reaction zone removes partial phosphorus elements released by phosphorus-releasing bacteria in the anaerobic zone by a phosphorus removal method of induced crystallization, thereby achieving the effect of high-efficiency phosphorus removal. Mixing the phosphorus-rich supernatant in the anaerobic zone with a magnesium chloride solution for reaction, wherein the reaction formula of struvite is as follows: mg (magnesium)2++ NH4 ++PO4 ++6H2O → MgNH4PO4·6H2O ↓, the struvite after crystallization can be recycled as the fertilizer to use.
4. The flocculant of the composite flocculant of polymerized magnesium chloride (PAV) and Chitosan (CTS) is prepared by mixing chitosan: white powder, the deacetylation degree of which is 85-90 percent, insoluble substances of which are less than 1 percent, and a chitosan solution with the mass concentration of 8mg/l and polymeric magnesium chloride which are prepared by using 1 percent of acetic acid solution according to the mass ratio of 2: 3, stirring evenly at the pH of 6-7, and aging for 12 hours. The composite flocculant can enable sludge particles in water to be gathered and enlarged, accelerate the settlement of sludge and effectively remove COD and phosphorus in sewage.
5. The coal sand filter material is prepared from active anthracite, natural river sand, shell sand and zeolite sand according to the volume ratio of 9: 6: 3: 1, the filter material can effectively remove suspended matters, microorganisms and ammonia nitrogen.
6. The advanced oxidation advanced treatment zone consists of ultraviolet hydrogen peroxide and active carbon, the ultraviolet lamp tubes are low-pressure lamps, the number of the ultraviolet lamp tubes is 7, and the power of each ultraviolet lamp tube is 250W; the medicine feeding tube is provided with 5 medicine outlets, and the ultraviolet dose is 200 mJ/cm2-250mJ/cm2，H2O2The concentration is 3 mg/L-5 mg/L, the combination of the active carbon and the ultraviolet hydrogen peroxide process can reduce the dosage and the retention time, and the active carbon can absorb excessive H2O2Residual H2O2The regeneration of the active carbon can be promoted to a certain extent, and the service life of the active carbon is prolonged; the treatment area can effectively remove organic pollutants and odor-causing pollutants in water.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a plan view of the present invention;
FIG. 2 is a flow chart of a sewage treatment process;
FIG. 3 is a flow diagram of a horizontal tube settling zone;
in the figure: 1-an anaerobic zone; 2-anoxic zone; 3-an aerobic zone; 4-a flocculation zone; 5-horizontal tube settling zone; 6-a sand filtration zone; 7-advanced oxidation advanced treatment area; an 8-side stream phosphorus removal zone; 9-a mud storage area; 10-water outlet channel; 12-a stirrer; 13-a peristaltic pump; 14-a sewer line; 15-sludge return line; 16-an aerator pipe; 17-a butterfly valve; 18-aeration main pipe; 19-an aeration branch pipe; 20-an aerator; 22-a sludge discharge pipe; 24-backwashing the water outlet pipe; 25-backwashing a water inlet pipe; 26-backwashing water pump; 27-quartz sleeve; 28-ultraviolet lamp tube; 29-hydrogen peroxide dosing tube; 32-a side stream conduit; 33-a dosing device; 34-a dosing pipeline; 35-a sludge pipeline; 36-sludge lift pump; 38-porous flow off ball type carrier packing.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present invention, it is to be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-3, the homogenized sewage is forced into the anaerobic zone 1 through a sewage pipe 14 by a peristaltic pump 13 and enters the anoxic zone 2 and the aerobic zone 3 in sequence along the water flow direction. Porous flow-off spherical carrier packing 38 is filled in the anoxic zone and the aerobic zone to form a biofilm system. The effects of sludge in-situ reduction and high-efficiency denitrification are achieved through the biological membrane system. Research shows that the porous spherical shell can generate water flow effect to form a flow separation phenomenon during stirring, and suspended matters in a liquid phase can be gathered to a region with slower flow speed when the flow speed of a fluid is different; the flow separation filler enables the mixed liquid suspended substances to gradually migrate and accumulate to the interior of the filler and be trapped on the surface of the filler in the flow separation ball; the accumulated activated sludge takes the polyurethane and fiber ball filler inside as a carrier, and is adsorbed on the surface of the carrier to gradually grow to form a biological film, and the operation is stable. The bottom of the anaerobic zone 1 and the anoxic zone 2 is provided with a submersible stirring machine 12, and the stirrer stirs sludge at the bottom of the tank to keep anaerobic and anoxic states. In addition, the return sludge is added in two points, the amount of the return sludge added to the anaerobic section is reduced, so that nitrate and dissolved oxygen entering the anaerobic section are reduced, and the rest return sludge flows back to the anoxic section to ensure the requirement of nitrogen. An aeration pipe 16 is communicated with the aerobic zone, a butterfly valve 17 is arranged on the aeration pipe, the bottom of the aerobic zone is connected with a plurality of aeration branch pipes 19 through aeration main pipes 18, an aerator 20 is arranged at the end part of each aeration branch pipe, and the aerator is a phi 215 diaphragm type microporous aerator and is used for carrying out aeration oxygen supply treatment on the aerobic zone.
Independently of A2The O biological treatment process is provided with a side phosphorus removal zone 8, and partial phosphorus elements released by phosphorus-releasing bacteria in an anaerobic zone are removed by a phosphorus removal method of induced crystallization, so that the effect of high-efficiency phosphorus removal is achieved. The design adopts common struvite to form dephosphorizationThe crystallization column enables 30% -40% of phosphorus-rich supernatant in the anaerobic zone to flow into the bottom of the crystallization column through a side flow pipeline 32 by a peristaltic pump 13 arranged at the tail end of the anaerobic zone 1, the side flow phosphorus removal zone 8 is provided with a dosing device 33 used for containing magnesium chloride solution, and the dosing device is communicated with the side flow phosphorus removal zone 8 through a dosing pipeline 34. The supernatant rich in phosphorus entering the anaerobic zone of the side-flow phosphorus removal zone is mixed with the magnesium chloride solution at the medicine adding port, and the aeration provides fluidization power to flow through the crystallization reaction zone in an upflow mode, wherein the reaction formula of struvite is as follows: mg (magnesium)2++NH4 ++PO4 ++ 6H2O→ MgNH4PO4·6H2And O ↓andthe struvite after crystallization can be recycled as fertilizer, and the supernatant after the upper standing area flows back to the aerobic tank 3 through the overflow port to continuously participate in the denitrification reaction of the main reaction area.
Adding a polymeric magnesium chloride and chitosan composite flocculant into the treated water in a flocculation zone 4, stirring, discharging into a horizontal pipe precipitation zone 5 for mud-water separation, discharging the supernatant after precipitation into a sand filtration zone 6, then further treating in an advanced oxidation advanced treatment zone 7, and discharging the treated water through a water outlet channel 10; the settled sludge is discharged to the sludge storage area 9 through a sludge discharge pipe 22 laid at the bottom of the horizontal pipe sedimentation tank, and partial sludge in the sludge storage area is pressed back to the bottoms of the anaerobic area 1 and the anoxic area 2 through a sludge return pipeline 15 under the action of a sludge lifting pump 36 and is mixed with inlet water.
And a compound flocculant of polymerized magnesium chloride (PAV) and Chitosan (CTS) is added into the flocculation zone 4, and the compound flocculant is prepared from chitosan: white powder, the deacetylation degree of which is 85-90 percent, insoluble substances of which are less than 1 percent, and a chitosan solution with the mass concentration of 8mg/l and polymeric magnesium chloride which are prepared by using 1 percent of acetic acid solution according to the mass ratio of 2: 3, stirring evenly at the pH of 6-7, and aging for 12 hours. The composite flocculant can enable sludge particles in water to be gathered and enlarged, accelerate the settlement of sludge and effectively remove COD and phosphorus in sewage; the rhombus sedimentation tube that the water flat level of the horizon pipe sedimentation zone 5 was placed by the multilayer level becomes 60 smooth mud chute with the horizontal plane and constitutes, cut apart into sedimentation tube and smooth mud chute that the settlement distance equals with vertical water cross section, the segmentation has precipitated and has arranged the mud function, when rivers horizontal flow passes through the sedimentation tube, sewage deposits perpendicularly, slide down behind the contact sedimentation tube bottom, in time get into smooth mud way through arranging the mud slit, break away from rivers and get into the mud district 9 of sedimentation zone bottom thereupon, mud-water separation, the settling distance of suspended solid has been shortened, the efficiency of precipitation is greatly improved.
The sand filtering area 6 leads the supernatant fluid after precipitation to pass through a coal sand filter material to filter impurities which are not completely processed and then to flow to the ultraviolet hydrogen peroxide disinfection area through a water outlet pipe, and the coal sand filter material is prepared by active anthracite, natural river sand, shell sand and zeolite sand according to the volume ratio of 9: 6: 3: 1, the filtering material is respectively provided with a 3cm gravel layer at the upper part and the lower part; the filter material can effectively remove suspended matters, microorganisms and ammonia nitrogen in water; meanwhile, a backwashing system consisting of a 24-backwashing water outlet pipe, a 25-backwashing water inlet pipe and a 26-backwashing water pump is arranged, and as the running time is prolonged, more and more impurities are intercepted by the coal sand filter material, the resistance of the filter layer is continuously increased, and the filtering effect is obviously reduced.
The advanced oxidation advanced treatment zone 7 is provided with a quartz sleeve 27, and an ultraviolet lamp tube 28 and a hydrogen peroxide dosing tube 29 are arranged in the quartz sleeve; the ultraviolet lamp tubes are low-voltage lamps, the number of the ultraviolet lamp tubes is 7, and each ultraviolet lamp tube has the power of 250W; the hydrogen peroxide dosing pipe is provided with 5 medicine outlets, the bottom of the hydrogen peroxide dosing pipe is provided with a stirrer 12, and hydrogen peroxide and sewage are uniformly mixed under the action of the stirrer; the ultraviolet dose is 200 mJ/cm2-250mJ/cm2，H2O2The concentration is 3 mg/L-5 mg/L, the process of the active carbon and the ultraviolet hydrogen peroxide is combined, the dosage and the retention time can be reduced, the active carbon can absorb excessive H2O2, the residual H2O2 can promote the regeneration of the active carbon to a certain extent, the service life of the active carbon is prolonged, and organic pollutants and smelly pollutants in water can be effectively removed in an advanced oxidation advanced treatment area.
The following is an example of a practical application:
sewage treatment scale 240m in Qingyun county people hospital3And d, sewage inlet water quality: the COD concentration is 200-350 mg/l; the concentration of BOD5 is 90-120 mg/l; the SS concentration is 80-120 mg/l; the concentration of ammonia nitrogen (calculated by N) is 25-40 mg/l; the concentration of total phosphorus (measured by P) is 4-8mg/l, and the water quality of the effluent water treated by the integrated sewage treatment device reaches the first grade A in urban sewage discharge standard GB18918-2002And (4) standard.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a sewage nitrogen and phosphorus removal integration processing system, its characterized in that, including anaerobic zone, anoxic zone, aerobic zone, flocculation district, horizontal pipe settling zone, sand filtration district, advanced oxidation advanced treatment district and the ditch of going out that communicates in proper order, anaerobic zone intercommunication has the side stream to remove the phosphorus district, the side stream removes phosphorus district and aerobic zone intercommunication, horizontal pipe settling zone intercommunication has the mud storage area, anaerobic zone and anoxic zone all communicate with the mud storage area.
2. The integrated sewage nitrogen and phosphorus removal treatment system of claim 1, wherein a peristaltic pump is arranged in the anaerobic zone, and the peristaltic pump is communicated with the side-stream phosphorus removal zone through a side-stream pipeline.
3. The integrated sewage denitrification and dephosphorization processing system according to claim 1, wherein a sludge reflux pump is arranged in said sludge storage area.
4. The integrated sewage denitrification and dephosphorization processing system according to claim 1, wherein porous flow-off ball type carrier filler is filled in the anoxic zone and the aerobic zone.
5. The integrated sewage denitrification and dephosphorization processing system according to claim 1, wherein the flocculation area is provided with a dosing pipeline for adding a polymeric magnesium chloride and chitosan composite flocculant.
6. The integrated sewage denitrification and dephosphorization processing system according to claim 1, wherein the sand filtering area is provided with a back washing device.
7. The integrated sewage denitrification and dephosphorization processing system according to claim 1, wherein an ultraviolet lamp tube and a chemical feeding tube are arranged in the advanced oxidation advanced treatment zone, and a stirrer is arranged at the bottom.
8. The integrated sewage denitrification and dephosphorization processing system according to claim 7, wherein said ultraviolet lamps are 7, each power is 250W, and said dosing pipe is provided with 5 drug outlets.
9. The integrated sewage denitrification and dephosphorization processing system according to claim 1, wherein both of said anaerobic zone and said anoxic zone are provided with agitators.
10. The integrated sewage denitrification and dephosphorization processing system according to claim 1, wherein aeration devices are arranged in said aerobic zone and said side stream dephosphorization zone.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112645454A (en) * | 2020-12-07 | 2021-04-13 | 重庆理工大学 | Continuous biological strengthening sewage treatment equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112645454A (en) * | 2020-12-07 | 2021-04-13 | 重庆理工大学 | Continuous biological strengthening sewage treatment equipment |
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