CN111003902A - Pipe factory integration sewage treatment system - Google Patents
Pipe factory integration sewage treatment system Download PDFInfo
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- CN111003902A CN111003902A CN201911413718.2A CN201911413718A CN111003902A CN 111003902 A CN111003902 A CN 111003902A CN 201911413718 A CN201911413718 A CN 201911413718A CN 111003902 A CN111003902 A CN 111003902A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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Abstract
The invention provides a pipe plant integrated sewage treatment system, and relates to the technical field of sewage treatment. This system adopts the terminal pipe network of sewage collection and the construction mode of sewage treatment plant integration, collects the banded space of being responsible for the distribution with sewage collection pipe network, makes urban sewage collect the branch pipe of pipe network, the trunk pipe through sewage and collects the back step by step, gets into and is responsible for in, at last be responsible for the terminal prefabricated box culvert of utilizing the assembled and establish sewage treatment plant, the retrieval and utilization is carried out to sewage after handling. The sewage treatment system of the invention can disperse and treat the sewage along the pipeline network and recycle the sewage nearby, thereby saving the pipeline network and the occupied area, and saving the investment cost for recycling the treated urban domestic sewage.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment system integrating a sewage treatment plant and a sewage collection pipe network, which can be used for treating urban domestic sewage, treating slightly polluted river water entering lakes and treating initial rainwater.
Background
The traditional urban sewage treatment system (water quality purification system) is composed of two independent parts, namely a sewage treatment plant and a matched sewage collecting pipe network. The urban sewage is collected by branch pipes, main pipes and main pipes step by step and then enters a sewage treatment plant at the downstream tail end for treatment.
With the development of cities for hundreds of years, a sewage collecting pipe network in a sewage treatment system is characterized in that:
1. the larger the city is, the longer the pipe network is, the more complex the pipe network system is, and the larger the proportion of the pipe network investment is.
2. The longer the urban history, the more complex the new and old pipe network connection problem.
The rainwater and sewage mixed flow is often generated in old cities, and a large amount of rainwater flows into a sewage pipe network in rainy seasons, so that the sewage collecting pipe network is often overwhelmed.
The modernization and the urbanization of China are rapidly developed, the land resources of a new first-line city and a second-line city which is developed at a high speed in economy are very scarce, and a new sewage treatment plant in the land is difficult to find in the urban area. Suitable plots are often in suburbs of cities, and even if the effluent reaches the recycling standard, the recycling value of water resources is lost due to overlong recycling pipelines.
Disclosure of Invention
The invention aims to provide a pipe-plant integrated sewage treatment system, which comprises a method for integrally building a municipal domestic sewage collecting pipe network and a sewage treatment plant, wherein a concrete prefabricated box culvert with a rigid cast-in-place interface is adopted to form a pipe-plant combined space structure, and a combined process of a mud-film symbiotic process, micro-nano molecular sieve air flotation, filtration and the like is adopted to treat sewage, so that the municipal domestic sewage is subjected to dispersion treatment and nearby recycling along the pipe network, the pipe network and the occupied area are saved, and the investment cost for recycling the treated municipal domestic sewage is saved.
In order to achieve the purpose, the invention provides the following technical scheme:
pipe factory integration sewage treatment system adopts the construction mode of sewage collection pipe network and sewage treatment plant integration, collects the banded space of being responsible for the distribution with sewage collection pipe network in as sewage treatment plant, makes municipal sewage pass through branch pipe, the trunk line of sewage collection pipe network collect the back step by step, get into at last and be responsible for in, be responsible for the end and utilize the prefabricated box culvert of concrete to construct the integrative sewage treatment plant of pipe factory, make sewage carry out the retrieval and utilization after handling.
Further, this sewage treatment system adopts assembled concrete prefabricated box culvert construction mode, assembles through the module and constitutes the sewage treatment plant who has banded spatial structure with prefabricated box culvert.
Further, the process of treating the urban sewage in the main pipe comprises the steps that the sewage is recycled after sequentially passing through the pretreatment unit, the sludge-film symbiotic biochemical tank and the advanced treatment unit;
the mud-film symbiotic biochemical tank adopts an assembled concrete prefabricated box culvert to construct a tank body; the specification of the box culvert is prefabricated according to the processing scale and the land width, and the box culvert is assembled on site in a construction site, and the box culvert is assembled on site by adopting a rigid cast-in-place interface; and the two sides of each prefabricated box culvert are provided with reserved steel bars, when the prefabricated box culverts are assembled, the reserved steel bars of the splicing parts of the two prefabricated box culverts are welded with the overlapped steel bars when the prefabricated box culverts are assembled, and concrete is poured at the splicing parts.
Further, the sludge-film symbiotic biochemical tank comprises a sludge-film symbiotic anoxic tank and a sludge-film symbiotic aerobic tank; a denitrification ecological base suitable for the growth of denitrifying heterotrophic bacteria is suspended in the sludge-film symbiotic anoxic tank, and a circulating stirring device is arranged; and a BDF ecological base is suspended in the sludge-film symbiotic aerobic tank, and an aeration device is arranged at the bottom of the tank.
Further, the system also comprises a secondary sedimentation tank, wherein the secondary sedimentation tank is constructed by adopting an assembled concrete prefabricated box culvert; and the effluent of the sludge-film symbiotic biochemical tank enters the secondary sedimentation tank for sludge-water separation and sedimentation, and then enters the advanced treatment unit.
Further, the depth processing unit sequentially comprises: the method comprises the following steps of (1) carrying out a micro-nano molecular sieve, filtering and disinfecting process, wherein the micro-nano molecular sieve comprises a micro-nano molecular sieve air floatation device, clear water generated after treatment by the micro-nano molecular sieve air floatation device automatically flows into a quartz sand filter from a clear water area to be filtered, the filtered water can be recycled nearby after being disinfected, and residual water which is not used completely can be discharged; scum generated after the treatment of the air floatation device is collected to a sludge tank through a scum scraper, and the sludge is subjected to dehydration treatment after being concentrated.
Furthermore, the pretreatment unit sequentially comprises a coarse and fine grid and an adjusting tank, wherein the coarse and fine grid is constructed by adopting an assembled concrete prefabricated box culvert and is used for isolating large granular substances in sewage; the adjusting tank adopts an assembled concrete prefabricated box culvert to construct a tank body, and a biomembrane carrier is added in the tank, the carrier needs to be sparse and is easy to culture a biomembrane, so that the water quality and the water quantity can be adjusted, and the subsequent biochemical treatment water quality and the water quantity can be controlled.
Furthermore, the sewage treatment system is buried, and only an inlet, an outlet and an access hole are reserved on the ground.
The pipe-plant integrated sewage treatment system provided by the invention is used for realizing the purpose of integrated construction of a collection pipe network and a sewage treatment plant, the sewage treatment plant is constructed by utilizing the collection pipe network, and the sewage treatment plant is built at the position of a sewage collection pipe network. The site selection of the sewage treatment plant can be green belt underground spaces at two sides of a road or strip-shaped vacant land (green land) through which any pipe network passes, so that more choices of land for the sewage treatment plant can be provided, the problem that the site selection of the current sewage treatment plant is difficult is solved, and the method is realized:
1. the urban sewage is treated nearby and reused nearby; the reuse of water resources is better realized, and the utilization rate of urban sewage is improved.
2. The pipe factory integrated sewage treatment system is built on the sewage collection main pipe nearby, the pipe diameter of the sewage collection main pipe can be reduced, the length of a reuse water pipe network is reduced, and therefore a large amount of pipe network investment cost is saved.
3. The small greening land through which the pipe network passes is used for dispersedly building the sewage treatment plant, so that a large area of land is not needed for building the sewage treatment plant, the land occupation of a sewage collecting pipe network, a recycling water pipe network and the sewage treatment plant is greatly reduced, and the site selection difficulty of the sewage treatment plant is reduced; the sewage treatment rate is improved; the land resource is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a site selection structure of a sewage treatment plant in a preferred embodiment of the present invention;
FIG. 2 is a schematic view of the vertical structure of the sewage treatment system of the present invention;
FIG. 3 is a schematic diagram of a preferred process configuration in the wastewater treatment system of the present invention;
FIG. 4 is a schematic diagram of splicing prefabricated culverts in the sewage treatment system of the present invention;
FIG. 5 is a schematic view of a prefabricated box culvert rigid interface in the sewage treatment system of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, the pipe-plant integrated sewage treatment system of the present invention is described, wherein a construction manner of integrating a sewage collection pipe network and a sewage treatment plant is adopted, and a strip-shaped space distributed in a main sewage collection pipe network is used as a sewage treatment plant, so that municipal sewage is collected by branch pipes and trunk pipes of the sewage collection pipe network step by step, and finally enters the main pipe, and a concrete prefabricated box culvert is used at the end of the main pipe to construct the pipe-plant integrated sewage treatment plant, so that the sewage is treated and recycled.
The integrated sewage treatment system is characterized in that a strip-shaped space distributed by a municipal sewage collecting main pipe is used as a sewage treatment plant. A roadside green belt with the width of more than 8 meters and the length matched with the pipe network collection scale is selected at a proper position of the sewage collection main pipe, and then the 'pipe plant integrated sewage treatment system' can be built on site. The treated effluent reaches the first class A standard of pollutant discharge Standard of urban Sewage treatment plant. Can be used for greening irrigation, road spraying and the like nearby. The site selection of the sewage treatment plant is schematically shown in figure 1. Urban sewage in the service range of the sewage treatment plant is collected into the main pipe through the branch pipe and the main pipe, and the sewage in the sewage collecting main pipe enters the integrated sewage treatment system. The system is adapted to the scale of the water to be drained within the service.
The sewage treatment system is buried underground, and only an inlet, an outlet and an access hole are reserved on the ground. The greening of the ground does not affect the surrounding environment, as shown in fig. 2. The building forms of the inlet, the outlet and the access hole are consistent with the style of the surrounding architectural landscape.
The sewage treatment system adopts an assembly type concrete prefabricated box culvert construction mode, and the prefabricated box culverts are assembled into the sewage treatment plant with a banded space structure through modules. Due to the limitation of the width of the belt-shaped structure, the volume of the unit length of the formed space is limited, and the process requirement of a sewage treatment plant needs certain retention time and space volume; the associated processing unit also requires a certain amount of space. Therefore, how to construct the strip-shaped space structure and what process and process flow to realize the functions of the sewage treatment plant in the strip-shaped space structure are the technical problems to be solved in the invention.
In a preferred embodiment, the process of treating the municipal sewage entering the main pipe comprises the steps of recycling the sewage after sequentially passing through a pretreatment unit, a sludge film symbiotic biochemical tank and a deep treatment unit, as shown in fig. 3;
the mud-film symbiotic biochemical tank adopts an assembled concrete prefabricated box culvert to construct a tank body; the specification of the box culvert is prefabricated according to the processing scale and the land width, and the box culvert is assembled on site in a construction site, and the box culvert is assembled on site by adopting a rigid cast-in-place interface; and the two sides of each prefabricated box culvert are provided with reserved steel bars, when the prefabricated box culverts are assembled, the reserved steel bars of the splicing parts of the two prefabricated box culverts are welded with the overlapped steel bars when the prefabricated box culverts are assembled, and concrete is poured at the splicing parts. The fabricated construction of the prefabricated box culvert can make the construction of sewage treatment plants quick and easy. The influence on the traffic is controlled to the minimum. The pipelines connecting all the tank bodies are connected by flexible sleeves. The flexible sleeve is arranged at the cast-in-place concrete position of the box culvert splicing part.
The urban sewage collecting main pipe is generally laid along a road along a river, and the selectable land is basically road or riverside greening land. Such plots are in strip-shaped planes and are close to roads or river sides, and construction has influence on road traffic, so that construction measures which do not obstruct or obstruct traffic less need to be taken during construction, and the construction period is shortened as much as possible.
This scheme adopts the precast concrete box culvert to found the required space of sewage treatment plant. The specification B multiplied by H of the prefabricated box culvert can adopt 4800 multiplied by 4800mm, 5400 multiplied by 5400mm, 6000 multiplied by 6000mm, 7200 multiplied by 6000mm and the like. The box culvert length L is generally 2000 mm.
The width of the post-cast concrete is preferably 200mm to 300 mm. The splicing schematic diagram of the prefabricated box culvert is shown in figure 4; the schematic diagram of the rigid interface of the prefabricated box culvert is shown in fig. 5.
The thickness, the reinforcing bars and the like of the assembled interface and the post-cast process unit pool wall of the concrete precast box culvert need professional structural designers to perform professional recheck according to the particularity of each project in the drawing design stage.
The invention adopts a sludge-film symbiotic biochemical process as a main biochemical process of a sewage treatment plant. The sludge-film symbiosis process is a high-efficiency biochemical treatment process. The principle is that a carrier (ecological base) for attaching and growing microorganisms is added into an activated sludge treatment tank. The basic environment for the existence of the microorganisms is changed from the original gas phase and liquid phase into the gas phase, the liquid phase and the solid phase, the change into the microorganisms creates a richer existence form, and the suspended state (activated sludge) and the attached state (biomembrane) microorganisms consume organic matters in the sewage together, so that the aim of efficiently and thoroughly purifying the sewage is fulfilled.
The sludge-film symbiotic biochemical tank comprises a sludge-film symbiotic anoxic tank and a sludge-film symbiotic aerobic tank, as shown in figure 2. An ecological base suitable for a nitrification unit and a denitrification unit is hung in the sludge-film symbiotic biochemical tank, and meanwhile, activated sludge is cultured in the biochemical tank. The method integrates the advantages of stable operation and high volume load of the biomembrane method, and also keeps the advantages of good effluent quality, good denitrification and dephosphorization effects and the like of the activated sludge method.
Preferably, a denitrification ecological base suitable for the growth of denitrifying heterotrophic bacteria is suspended in the sludge-film symbiotic anoxic tank, and a circulating stirring device is arranged. The denitrification ecological base is a fixed filler, and the volume of the denitrification ecological base is 0.45V (V is the tank volume). The circulation stirring device is preferably a vertical flow type multi-medium biological reaction circulation stirring system and a device thereof (CN104355400A) in the patent, and the mixed solution is vertically stirred in 360 degrees to be in a suspension state and promote the aging biological membrane attached to the ecological base to fall off. The mixed liquid is fully contacted with the denitrification ecological base, and the aim of high-efficiency denitrification is fulfilled through the combined action of the ecological base and the activated sludge.
And a BDF ecological base is suspended in the mud-film symbiotic aerobic tank. The BDF ecobase is also a fixed packing. The volume was 0.7V (V is the cell volume). The BDF ecological base provides huge living space and good living conditions for the microorganisms, and creates basic conditions for mass propagation and diversification of the microorganisms. The ecological base is essentially a carrier for immobilized microbial technology. Is a biotechnology in which microorganisms are immobilized on a carrier so as to be highly dense and maintain their bioactive functions. The BDF ecobase allows microorganisms to aggregate and rapidly propagate on a carrier, and removes contaminants in sewage through the metabolic action of the microorganisms. The bottom of the aerobic tank is provided with an aeration device, and the aeration device is used for oxygenating the sewage and making the sewage in the tank body in a flowing state so as to ensure that the sewage is fully contacted with the ecological base immersed in the sewage. The aerobic tank is in a high sludge concentration state, and the MLSS is at least 4000 mg/L.
In a preferred embodiment, the system further comprises a secondary sedimentation tank, wherein the secondary sedimentation tank is constructed by adopting an assembled concrete prefabricated box culvert; and the effluent of the sludge-film symbiotic biochemical tank enters the secondary sedimentation tank for sludge-water separation and sedimentation, and then enters the advanced treatment unit.
In a preferred embodiment, the depth processing unit comprises in sequence: the micro-nano molecular sieve and the filtering and disinfecting process have the advantages that the micro-nano molecular sieve comprises a micro-nano molecular sieve air floating device, the micro-nano molecular sieve air floating device adopts an automatic slag discharge barrel type micro-nano molecular sieve sewage treatment air floating system (ZL200910218212.6), the device is an efficient sewage treatment device, the effect of removing various pollutants such as COD (chemical oxygen demand), BOD (biochemical oxygen demand), ammonia nitrogen and the like in sewage is good, and the removal rate of total phosphorus can reach more than 99%.
The method comprises the steps of preparing a micro-nano bubble gas-liquid mixed treatment medium by using a large amount of gas in a micro-nano molecular sieve gas floating device, carrying out gas floating and gas distribution operation on a water body, leading gas and liquid in a suction gas float bowl into a 'recoil excited bubble releaser', impacting and exciting pressurized dissolved gas liquid in the recoil excited bubble releaser, then suddenly increasing the pressure, suddenly dissipating energy and reducing the pressure through the releaser, and promoting the micro-nano bubbles to be uniformly and stably released from a spray head to form milky micro-nano bubbles in water, wherein the bubbles are not easy to break in the water, and the micro-nano bubbles are many and small, so the specific surface area is more than ten thousand times of that of the conventional bubbles, the gas dissolving efficiency in the water is more than that of the conventional method, and the gas floating separation effect of micro particles and pollutants in the water is.
The particle diameter of the nano bubbles generated by the micro-nano molecular sieve air flotation device is 2-3 orders of magnitude smaller than that of dissolved air flotation bubbles, and the defects of large dissolved air flotation bubbles, easiness in convergence, high rising speed, large solute loss and short retention time in water in the traditional dissolved air flotation device are overcome. The micro-nano molecular sieve technology utilizes the micro-nano bubble release technology to release high-energy active oxygen in water, and the generated nano bubbles have super strong cavitation oxidation and energy breaking and bond breaking effects on organic pollutants difficult to degrade in water, so that the pollutant decomposition effect is effectively improved.
Clear water generated after being treated by the micro-nano molecular sieve air floatation device automatically flows from a clear water area to enter a quartz sand filter for filtering, the filtered water can be recycled nearby after being sterilized, and residual water which is not fully recycled can be discharged; scum generated after the treatment of the air floatation device is collected to a sludge tank through a scum scraper, and the sludge is subjected to dehydration treatment after being concentrated.
Preferably, the pretreatment unit comprises a coarse and fine grid and an adjusting tank in sequence, wherein the coarse and fine grid is constructed by adopting an assembled concrete prefabricated box culvert and is used for isolating large granular substances in sewage; the adjusting tank adopts an assembled concrete prefabricated box culvert to construct a tank body, and a biomembrane carrier is added in the tank, so that the carrier needs to be sparse and is easy to culture a biomembrane, and the adjusting tank is used for adjusting water quality and water quantity and ensuring that the subsequent biochemical treatment water quality and water quantity are controllable.
At present, the lowest requirement of discharge or reuse of urban sewage treatment plants is to reach the first class A standard of pollutant discharge standard of urban sewage treatment plants, and complete pretreatment, biochemical treatment and advanced treatment units are needed. The pretreatment adopts a coarse and fine grid and an adjusting tank. The coarse and fine grids separate large granular substances, and the adjusting tank adjusts the water quality and the water quantity, so that the subsequent biochemical treatment water quantity and the subsequent water quality can be controlled. The biochemical treatment unit adopts a sludge-film symbiotic biochemical process, and the effective combination of the activated sludge and the biological film leads the sludge concentration to be higher and the biochemistry to be more thorough. The advanced treatment adopts micro-nano molecular sieve air floatation equipment, filtration and disinfection, and ensures that the quality of the effluent water stably reaches the standard.
In the aspect of space structure, the most main process units, namely an adjusting tank, a biochemical treatment unit (a mud-film symbiotic biochemical tank), a coarse and fine grid channel and a secondary sedimentation tank, adopt an assembled concrete prefabricated box culvert to construct a tank body. The micro-nano molecular sieve, the filter, the disinfection and medicine adding system and other process units are mostly equipment. However, since the sewage treatment plant is constructed in a buried manner, it is necessary to construct an underground space for the facilities. During design, the size of the advanced treatment equipment is determined according to the size of the treatment scale, and whether the equipment placing space is constructed by utilizing the prefabricated concrete box culvert or not is selected according to the specific size of the equipment.
The combined process of pretreatment, sludge-membrane symbiosis biochemical process, micro-nano molecular sieve, filtration and disinfection can ensure that the effluent of the integrated sewage treatment system of the pipe plant can stably reach the first-level A standard of the discharge standard of pollutants for urban sewage treatment plants, wherein the indexes of COD and BOD reach or are superior to the IV standard of surface water environmental quality standard, and the total phosphorus is less than or equal to 0.05mg/L, so the combined process is suitable for the integrated sewage treatment system of the pipe plant.
The pipe-plant integrated sewage treatment system can be used for treating urban domestic sewage, can also be used for treating slightly polluted river water entering lakes and initial rainwater, and can treat polluted water while overflowing river water and rainwater.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. Pipe factory integration sewage treatment system, its characterized in that: the integrated construction mode of the sewage collection pipe network and the sewage treatment plant is adopted, the sewage collection pipe network is used for collecting the strip-shaped space distributed by the main pipe as the sewage treatment plant, so that the urban sewage is collected step by step through the branch pipes and the main pipes of the sewage collection pipe network and finally enters the main pipe, and the tail end of the main pipe is recycled after sewage treatment.
2. The pipe mill integrated sewage treatment system according to claim 1, wherein: this sewage treatment system adopts assembled concrete precast box culvert mode of assembling, assembles through the module and constitutes the sewage treatment plant who has banded spatial structure with precast box culvert.
3. The pipe mill integrated sewage treatment system according to claim 2, wherein: the process of treating the urban sewage in the main pipe comprises the steps that the sewage is recycled after sequentially passing through a pretreatment unit, a sludge-film symbiotic biochemical tank and an advanced treatment unit;
the mud-film symbiotic biochemical tank adopts an assembled concrete prefabricated box culvert to construct a tank body; the specification of the box culvert is prefabricated according to the processing scale and the land width, and the box culvert is assembled on site in a construction site, and the box culvert is assembled on site by adopting a rigid cast-in-place interface; and the two sides of each prefabricated box culvert are provided with reserved steel bars, when the prefabricated box culverts are assembled, the reserved steel bars of the splicing parts of the two prefabricated box culverts are welded with the overlapped steel bars when the prefabricated box culverts are assembled, and concrete is poured at the splicing parts.
4. The pipe mill integrated sewage treatment system according to claim 3, wherein: the sludge-film symbiotic biochemical tank comprises a sludge-film symbiotic anoxic tank and a sludge-film symbiotic aerobic tank; a denitrification ecological base suitable for the growth of denitrifying heterotrophic bacteria is suspended in the sludge-film symbiotic anoxic tank, and a circulating stirring device is arranged; and a BDF ecological base is suspended in the sludge-film symbiotic aerobic tank, and an aeration device is arranged at the bottom of the tank.
5. The pipe mill integrated sewage treatment system according to claim 3 or 4, wherein: the system also comprises a secondary sedimentation tank, wherein the secondary sedimentation tank is constructed by adopting an assembled concrete prefabricated box culvert; and the effluent of the sludge-film symbiotic biochemical tank enters the secondary sedimentation tank for sludge-water separation and sedimentation, and then enters the advanced treatment unit.
6. The pipe mill integrated sewage treatment system according to claim 5, wherein: the deep processing unit comprises in sequence: the method comprises the following steps of (1) carrying out a micro-nano molecular sieve, filtering and disinfecting process, wherein the micro-nano molecular sieve comprises a micro-nano molecular sieve air floatation device, clear water generated after treatment by the micro-nano molecular sieve air floatation device automatically flows into a quartz sand filter from a clear water area to be filtered, the filtered water can be recycled nearby after being disinfected, and residual water which is not used completely can be discharged; scum generated after the treatment of the air floatation device is collected to a sludge tank through a scum scraper, and the sludge is subjected to dehydration treatment after being concentrated.
7. The pipework-integrated sewage treatment system of claim 3, 4 or 6, wherein: the pretreatment unit sequentially comprises a coarse and fine grid and an adjusting tank, wherein the coarse and fine grid is constructed by adopting an assembled concrete prefabricated box culvert and is used for separating large granular substances in sewage; the adjusting tank adopts an assembled concrete prefabricated box culvert to construct a tank body, and a biomembrane carrier is added in the tank body and used for adjusting the water quality and the water quantity and ensuring that the subsequent biochemical treatment water quality and the water quantity are controllable.
8. The pipe mill integrated sewage treatment system according to claim 1, wherein: the sewage treatment system is buried underground, and only an inlet, an outlet and an access hole are reserved on the ground.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112049212A (en) * | 2020-07-17 | 2020-12-08 | 浙大宁波理工学院 | Method for separating rainwater from sewage |
Citations (4)
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