CN117185589B - Advanced treatment integrated device for live pig breeding wastewater - Google Patents
Advanced treatment integrated device for live pig breeding wastewater Download PDFInfo
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Landscapes
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses an integrated device for advanced treatment of pig breeding wastewater, which belongs to the technical field of sewage treatment equipment and comprises a treatment tank, wherein an ecological wetland tank is arranged in the middle of the treatment tank, an anaerobic treatment unit is arranged in the ecological wetland tank, anoxic treatment tanks, aerobic treatment tanks, flocculation sedimentation tanks, ultraviolet disinfection tanks and filtering adsorption tanks are sequentially arranged on two sides of the ecological wetland tank in the treatment tank according to the water flow direction, water outlets of the anaerobic treatment unit are respectively communicated with water inlets of the anoxic treatment tanks, water outlets of the two filtering adsorption tanks are communicated with water inlets of the ecological wetland tank, the anaerobic treatment unit is provided with a water inlet pipe, and the ecological wetland tank is connected with a water outlet pipe. The beneficial effects of the invention are as follows: the central symmetry structural layout is adopted, so that the process applicability can be met, the complete combination of series and parallel flows can be realized, the processing capacity and the processing efficiency of the system are improved, and the deep purification and standard treatment of pollutants such as organic matters, nitrogen, phosphorus, heavy metals, antibiotics, bacteria, roundworm eggs and the like are ensured.
Description
Technical Field
The invention relates to the technical field of sewage treatment equipment, in particular to an integrated device for advanced treatment of pig breeding wastewater.
Background
In recent years, intensive and large-scale development of livestock and poultry cultivation plays a great role in the aspect of meat supply guarantee, however, a great amount of livestock and poultry manure is generated along with the intensive and large-scale development, and the serious problems of water environment deterioration, water ecological damage, soil pollution and the like of rivers, lakes and reservoirs and the like are gradually caused by the pollution of surface water, soil and groundwater due to unreasonable, inapplicable and nonstandard treatment modes or routes, so that key constraint factors and pollution control blind areas which influence the continuous improvement of ecological environment quality are gradually formed. From the aspects of cultivation scale and waste water yield, pig cultivation is a typical representative, and deep or standard treatment of cultivation waste water is a key attack direction for future water ecological environment protection, water environment treatment and agricultural rural pollution control. The source of the pig breeding wastewater comprises livestock manure, urine excretion, water for colony house cleaning and disinfection, personnel domestic sewage and the like. The suspended matters in the waste water are high in content, the concentration of organic matters, nitrogen and phosphorus is high, the carbon-nitrogen ratio (C/N) is unbalanced, and meanwhile, a large amount of substances such as antibiotics, pathogens and bacteria are also contained, so that if the substances are not treated necessarily, the substances are discharged into the environment to be extremely harmful.
The cultivation wastewater after anaerobic fermentation treatment can be directly used as an agricultural fertilizer for returning to the field for digestion, but the concentration of main pollutants is still higher, and the potential environmental risk is huge; meanwhile, the problem of whether the land is sufficiently matched and the problem of safe storage of manure in the non-farming period are solved by returning to the field, and the problem of 'returning Tian Xiaona' is also caused for small and medium-sized large-scale pig farms. At present, the main technologies for continuously treating the pig raising wastewater after anaerobic fermentation comprise three types of physical and chemical treatment, biochemical treatment, natural ecological treatment and the like. The physical and chemical treatment technology comprises an adsorption method, an air floatation method, a flocculation precipitation method, an electrochemical oxidation method, a Fenton reagent oxidation method and the like; the biochemical treatment technology comprises anaerobic treatment technology and aerobic treatment technology, and relates to the application of a plurality of reactors such as UASB, IC, MBR, CASS, SBR, A/O and the like; the natural ecological treatment technology mainly utilizes artificial facilities simulating natural ecology such as an oxidation pond, a land infiltration system, an artificial wetland and the like to realize the purification and removal of pollutants.
The three types of treatment technologies have advantages and disadvantages and applicable conditions, and in practical engineering, more common applications are various technical combinations, such as a combination form of physical treatment and biochemical treatment: (1) A/O- & gtA/O- & gtflocculation precipitation; (2) air floatation, A/A/O, and flocculation precipitation. For another example, the combination of physical and chemical treatment, biochemical treatment and natural ecological treatment: (1) A/O- & gt flocculation precipitation- & gt pond oxide; (2) pond-SBR-pond-flocculation precipitation. The treatment process meets the requirements of standard treatment of the live pig breeding wastewater in mechanism and effect, but still has the following problems:
(1) The application range is limited. Only large (the annual output is more than 10000) large-scale live pig farms have construction and operation conditions, a large number of medium-and small-scale farms (the annual output is between 500 and 10000) are limited by factors such as fields, cost and management, and cannot support construction or operation of standard treatment facilities or devices of the cultivation wastewater, and processes or devices matched with the cultivation scale are still vacant.
(2) And the process is excessively dependent on a physical and chemical treatment working section. The actual operation tends to realize the rapid removal of pollutants such as suspended matters, total phosphorus and the like by adding medicaments, so that the medicament consumption is large, the operation cost is increased, and the removal of organic matters and nitrogen is limited; the produced materialized sludge is not easy to treat and is easy to cause secondary environmental hazard; resulting in inefficient or ineffective mating biochemical treatment sections, resulting in unnecessary waste.
(3) The performance and value of biochemical treatments have not been fully explored. The main flow process still continues the traditional anaerobic and aerobic mechanisms and treatment processes, and the denitrification and carbon reduction are realized based on the whole process of ammoniation-nitrosation-nitrification-denitrification, so that unnecessary energy and carbon source waste is caused, the output of residual sludge is high, the pollution load cannot be effectively improved, and the overall efficiency of the system is limited.
(4) The construction and operation costs are high. According to investigation data, the construction cost of the large-scale pig farm wastewater advanced treatment facility is in the range of 2.43-3.17 ten thousand yuan/ton, the average operation and maintenance cost (comprising labor, medicament and electricity consumption) is 11.1 yuan/ton, the operation and maintenance cost is far higher than the operation and maintenance cost (0.8-1.5 yuan/ton) of a town sewage treatment plant, and the medium-and-small-sized pig farm is difficult to succeed, and the targeted process technology and equipment are lacked.
Disclosure of Invention
The invention aims to provide an integrated device for advanced treatment of pig breeding wastewater by combining with the practical production of small and medium-sized pig farms, which saves land occupation, reduces energy loss and material consumption, reduces cost and improves treatment efficiency on the premise of ensuring water quality, and provides a feasible selection scheme for solving the difficulty of Tian Xiaona and Tian Xiaona of pig breeding wastewater, thereby realizing advanced purification and standard treatment.
The aim of the invention is achieved by the following technical scheme:
the utility model provides a live pig breeds advanced treatment integrated device of waste water, includes the treatment tank, the middle part of treatment tank is equipped with ecological wetland pond, be equipped with anaerobic treatment unit in the ecological wetland pond, be located in the treatment tank ecological wetland pond's both sides are equipped with anoxic treatment pond, aerobic treatment pond, flocculation sedimentation tank, ultraviolet disinfection pond, filtration adsorption tank in proper order according to the rivers direction, anaerobic treatment unit goes out the water end and communicates two respectively anoxic treatment pond's water inlet end, two filtration adsorption tank's water outlet end communicates ecological wetland pond's water inlet end, anaerobic treatment unit is equipped with the inlet tube, ecological wetland pond is connected with the outlet pipe.
Further, be located in the treatment pond filter adsorption pond with ecological wetland pond's lower extreme is equipped with the equipment room, anaerobic treatment unit includes inner tube and urceolus, the inner tube with the lower extreme of urceolus is all passed between the equipment with ecological wetland pond's baffle, just the lower extreme of inner tube with the diapire between the equipment is connected, the lower extreme of urceolus with the diapire between the equipment has the clearance, is located be located in the equipment room the lateral wall of inner tube is equipped with the inlet tube, the inlet tube extends to outside the lateral wall of urceolus and connects outside sewage source, the inner tube is located be equipped with circulation pipe on the lateral wall of clearance department, the other end of circulation pipe is equipped with the intercommunication the diapire of urceolus.
Further, the upper end of the outer cylinder is provided with a water outlet cylinder, a conical three-phase separator which is matched with the outer cylinder and the inner cylinder is arranged in the water outlet cylinder, the upper end of the conical three-phase separator is connected with a ventilation pipe, the other end of the ventilation pipe extends out from a top cover of the water outlet cylinder, a water outlet weir is arranged outside the conical three-phase separator, and connecting pipes which are connected with the water outlet weir and the anoxic treatment tank are symmetrically arranged on the water outlet cylinder.
Further, main partition boards are arranged on two sides of the ecological wetland tank in the treatment tank, the anoxic treatment tank, the aerobic treatment tank, the flocculation sedimentation tank, the ultraviolet disinfection tank and the filtering adsorption tank are respectively arranged on two sides of the main partition boards, the volume of the anoxic treatment tank is smaller than that of the aerobic treatment tank, a plurality of groups of flexible fillers are suspended in the anoxic treatment tank at intervals, and anoxic treatment water outlets are formed in the anoxic treatment tank and the partition boards of the aerobic treatment tank.
Further, a porous partition plate is arranged in the aerobic treatment tank, inert filler is paved on the porous partition plate, aquatic plants are planted on the inert filler, an aerobic treatment water outlet which is communicated with the aerobic treatment tank and the flocculation sedimentation tank is arranged on the main partition plate, the aerobic treatment water outlet is positioned above the porous partition plate, a flow guide partition plate and a plurality of movable fillers are vertically arranged below the porous partition plate in the aerobic treatment tank, a gap is reserved between the upper end of the flow guide partition plate and the porous partition plate, a gap is reserved between the lower end of the flow guide partition plate and the bottom wall of the aerobic treatment tank, the flow guide partition plate divides the aerobic treatment tank into a fluidization ascending area and a fluidization descending area, the fluidization ascending area is positioned on one side of the flow guide partition plate facing the anoxic treatment water outlet, and an aerator pipe is uniformly distributed on the bottom wall of the fluidization ascending area.
Further, the width of the fluidization ascending area is larger than that of the fluidization descending area, the fluidization descending area is provided with a lower guide plate, the upper end of the lower guide plate is connected with the side wall of the aerobic treatment tank, the lower end of the lower guide plate is located right below the guide baffle and connected with the bottom wall of the aerobic treatment tank, and the height of the anoxic treatment water outlet is identical with that of the lower end of the guide baffle.
Further, upper guide plates are symmetrically arranged on two sides of the guide plates in the aerobic treatment tank, the upper ends of the upper guide plates are abutted to the porous partition plates, and the lower ends of the upper guide plates are connected with the side walls of the aerobic treatment tank.
Further, the sedimentation treatment baffle is arranged in the flocculation sedimentation tank and perpendicular to the water outlet direction of the sludge discharge port, water outlets and water inlets are respectively formed in two opposite side walls of the ultraviolet disinfection tank, the water inlets are communicated with the flocculation sedimentation tank, the water outlets are communicated with the filtering adsorption tank, the height of the water outlets is greater than that of the water inlets, and a plurality of rows of ultraviolet disinfection lamps are vertically arranged on non-perforated side walls of the ultraviolet disinfection tank.
Further, a first gravel filtering layer, a quartz sand filtering layer, a granular activated carbon filtering layer, a zeolite filtering layer and a second gravel filtering layer are sequentially paved in the filtering and adsorbing pond from bottom to top, the grain size of the second gravel filtering layer is smaller than that of the first gravel filtering layer, and aquatic plants are planted on the second gravel filtering layer.
Further, a third gravel filter layer for planting aquatic plants and submerged plants is laid on the bottom wall of the ecological wetland pool, the particle size of the third gravel filter layer is consistent with that of the first gravel filter layer, water holes communicated with the first gravel filter layer and the third gravel filter layer are formed in the partition plate of the ecological wetland pool, and the laying height of the third gravel filter layer is consistent with that of the first gravel filter layer and the water holes.
The invention has the following advantages:
1. through integrated design, space utilization is high-efficient, adopts central symmetry formula structural layout, is parallelly connected at oxygen deficiency, good oxygen, sediment, disinfection, filtration adsorption section, and the parallel part is established ties with the ecological wetland pond of anaerobic treatment unit and rear end in front end again, can satisfy the technology suitability, can realize the complete combination of series connection and parallelly connected flow again, promotes system throughput and treatment effeciency, ensures pollutant deep purification and standard treatment such as organic matter, nitrogen, phosphorus, heavy metal, antibiotic, bacterium, roundworm ovum.
2. The technology is characterized in that the biochemical treatment is focused on, the anaerobic internal circulation and aerobic fluidization mode is adopted, the mass transfer effect is enhanced, various filler carriers and different dissolved oxygen conditions are matched, the occurrence forms, biomass and community structures of microorganisms in the system are enriched, the biodegradation efficiency is enhanced, and the physical and ecological means are flexibly assisted, so that the energy consumption and the material consumption in the operation stage are effectively reduced, the technology is suitable for the deep purification or standard treatment of the wastewater of the medium-and small-scale live pig farms, and the defects of environmental protection technical equipment for pollution control of livestock and poultry cultivation can be effectively overcome.
Drawings
Fig. 1 is an overall schematic of the present invention.
Fig. 2 is a top view of the structure of the present invention.
FIG. 3 is a schematic illustration of the structure of the outer sidewall panel of the present invention with no filler removed and no filler applied.
FIG. 4 is a schematic view of the outside wall panel of the present invention with the outside wall panel removed.
Fig. 5 is a schematic diagram of the internal structure of the present invention from a side view.
Fig. 6 is a schematic diagram of a filler laying structure in a filtering and adsorbing tank.
FIG. 7 is a schematic view of the internal structure and the positional relationship of the water outlet barrel.
FIG. 8 is a schematic diagram of the positional relationship of the three-phase separator to the inner barrel.
FIG. 9 is a schematic view of the partial structure of the inner and outer cylinders of the equipment room.
In the figure, a 1-treatment tank, a 2-ecological wetland tank, a 3-anaerobic treatment unit, a 31-inner cylinder, a 32-outer cylinder, a 33-circulation conduit, a 34-water outlet cylinder, a 35-conical three-phase separator, a 36-ventilation pipe, a 37-water outlet weir, a 4-anoxic treatment tank, a 41-flexible filler, a 42-anoxic treatment water outlet, a 5-aerobic treatment tank, a 51-porous baffle, a 52-diversion baffle, a 53-aeration pipe, a 54-lower baffle, a 55-upper baffle, a 6-flocculation precipitation tank, a 61-precipitation treatment baffle, a 7-ultraviolet disinfection tank, a 71-water outlet hole, a 72-water inlet hole, a 73-ultraviolet disinfection lamp, an 8-filtration adsorption tank, an 81-first gravel filter layer, an 82-quartz sand filter layer, an 83-particle activated carbon filter layer, an 84-zeolite filter layer, an 85-second gravel filter layer, a 9-water inlet pipe, a 10-water outlet pipe, an 11-inter-equipment, a 12-connecting pipe, a 13-main baffle, and a 14-water outlet hole.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without collision.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present invention and for simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1-9, one embodiment of the present invention is:
the utility model provides a live pig breeds advanced treatment integrated device, includes treatment tank 1, the middle part of treatment tank 1 is equipped with ecological wetland pond 2, be equipped with anaerobic treatment unit 3 in the ecological wetland pond 2, be located in the treatment tank 1 ecological wetland pond 2's both sides are equipped with anoxic treatment pond 4, aerobic treatment pond 5, flocculation sedimentation pond 6, ultraviolet disinfection pond 7, filtration absorption pond 8 in proper order according to the rivers direction, anaerobic treatment unit 3 play water end intercommunication anoxic treatment pond 4's water inlet end, filtration absorption pond 8 play water end intercommunication ecological wetland pond 2's water inlet end, anaerobic treatment unit 3 is equipped with inlet tube 9, ecological wetland pond 2 is connected with outlet pipe 10.
The invention adopts an integrated design, is based on a novel biological denitrification and dephosphorization mechanism of short-range nitrification and denitrification, synchronous nitrification and denitrification and biological dephosphorization, adopts an internal circulation anaerobic granular sludge and aerobic fluidized bed biological membrane biochemical technology, is matched with disinfection, filtration and ecological treatment processes, effectively reduces energy consumption and material consumption in an operation stage, structurally sets an ecological wetland tank 2 in the middle of a treatment tank 1, internally sets an anaerobic treatment unit 3, sets an anoxic treatment tank 4, an aerobic treatment tank 5, a flocculation sedimentation tank 6, an ultraviolet disinfection tank 7 and a filtration adsorption tank 8 on two sides of the ecological wetland tank 2, adopts a central symmetry structural layout, maximizes the utilization space, meets the process applicability, connects in parallel with anoxic, aerobic, sedimentation, disinfection and filtration adsorption sections, connects in series with the anaerobic and ecological wetland at the rear end of the front end in parallel, realizes complete combination of series connection and parallel connection in the treatment flow, improves the treatment capacity and treatment efficiency of the system, simultaneously, does not need to stop the whole device during subsequent sludge discharge and overhaul, ensures stable and continuous operation of the system, and can improve the running water quality and fault tolerance and reduce the fluctuation risk; the cultivation wastewater is sequentially treated by 7 working sections of anaerobic-anoxic-aerobic-precipitation-disinfection-filtration-ecological wetland, so that the deep purification and standard treatment of pollutants such as organic matters, nitrogen, phosphorus, heavy metals, antibiotics, bacteria, roundworm eggs and the like are ensured. Is suitable for the advanced treatment of the wastewater of the medium-sized and small-sized pig farms, and can effectively make up the defects of environmental protection technical equipment for pollution control of livestock and poultry cultivation.
In this embodiment, the lower ends of the filter adsorption tank 8 and the ecological wetland tank 2 in the treatment tank 1 are provided with an equipment room 11, the anaerobic treatment unit 3 comprises an inner cylinder 31 and an outer cylinder 32, the lower ends of the inner cylinder 31 and the outer cylinder 32 penetrate through the partition boards of the equipment room 11 and the ecological wetland tank 2, the lower end of the inner cylinder 31 is connected with the bottom wall of the equipment room 11, a gap is formed between the lower end of the outer cylinder 32 and the bottom wall of the equipment room 11, the side wall of the inner cylinder 31 in the equipment room 11 is provided with the water inlet pipe 9, the water inlet pipe 9 extends out of the side wall of the outer cylinder 32 and is connected with an external sewage source, the side wall of the inner cylinder 31 at the gap is provided with a circulating conduit 33, and the other end of the circulating conduit 33 is provided with the bottom wall communicated with the outer cylinder 32.
As shown in figures 1 and 2, because the water inlet and outlet pipes are all positioned in the middle area of the treatment tank, after the symmetrical arrangement of the tank bodies, the equipment room 11 is arranged at the lower end of the filtering and adsorbing tank 8 and the ecological wetland tank 2 for facilitating the installation and subsequent maintenance and repair of equipment and pipelines, and the height of the filtering and adsorbing tank 8 and the ecological wetland tank 2 can be raised at the same time after the arrangement of the equipment room 11, so that the filtering and adsorbing tank 8 and the ecological wetland tank 2 can conveniently construct a composite wetland environment.
As shown in fig. 1 and 9, the gap formed between the outer cylinder 32 and the bottom wall of the equipment room 11 is convenient for installing the circulation conduit 33, in this embodiment, the circulation conduit 33 is symmetrically distributed to realize hydraulic connection and uniform water distribution of the inner and outer cylinders of the anaerobic treatment unit 3, that is, wastewater flows into the inner cylinder from the outer cylinder and circulates reciprocally, and further, in order to improve the circulation effect, a circulation water pump adapting to the circulation conduit can be additionally arranged on the bottom wall of the equipment room according to the situation.
Specifically, the upper end of the outer cylinder 32 is provided with a water outlet cylinder 34, as shown in fig. 1,3,4,7,8, a conical three-phase separator 35 adapted to the outer cylinder 32 and the inner cylinder 31 is arranged in the water outlet cylinder 34, the upper end of the conical three-phase separator 35 is connected with a gas permeability pipe 36, the other end of the gas permeability pipe 36 extends out from the top cover of the water outlet cylinder 34, a water outlet weir 37 is arranged outside the conical three-phase separator 35, and connecting pipes 12 for connecting the water outlet weir 37 and the anoxic treatment tank 4 are symmetrically arranged on the water outlet cylinder 34.
The three-phase separator adopts a cone shape and is connected with the ventilation pipe 36, thereby realizing the three-phase separation effect of exhaust, mud blocking and baffling; the water outlet weir 37 is annularly distributed along the water outlet area, the bottom of the water outlet weir is level with the upper end of the inner barrel, the water outlet overflow openings are triangular teeth, the connecting pipes 12 are symmetrically distributed, one end of each water outlet weir is level with the bottom of the water outlet weir 37, and the other end of each water outlet weir enters the anoxic treatment unit so as to form anoxic, aerobic, sedimentation, disinfection and filtration adsorption sections in parallel.
The external sewage flows upwards after entering the inner cylinder 31 through the water inlet pipe 9 to form an anaerobic treatment upflow zone, is baffled after reaching the three-phase separator, and a small part of the sewage is dispersed and enters the water outlet weir 37, and most of the sewage enters the outer cylinder 32 and the inner cylinder 31 to form an anaerobic downflow zone and is circularly reciprocated under the action of a circulating conduit and a circulating water pump, so that the secondary hydrolysis, fermentation and degradation of organic pollutants are realized, and the biochemical performance of the cultured sewage is further improved.
The circulation conduit 33 is utilized to form higher liquid flow rate, so that the internal shearing action of the fluid is improved, the mass transfer effect of solid (sludge) and liquid (wastewater) is enhanced, the rapid formation of anaerobic granular sludge and the degradation performance thereof can be promoted, the organic pollution load and the impact resistance of the system are improved, and the adaptability to refractory organic matters and suspended matters is improved; meanwhile, the circulating flow forms longer sludge residence time and larger height-diameter ratio, creates a good sedimentation environment, is suitable for screening anaerobic microbiota adapting to the water quality of the culture wastewater, improves the biomass thereof, promotes the conversion of refractory organic matters, and creates favorable conditions for the subsequent working section. Anaerobic and small amounts of NO 3 - The condition of N is favorable for phosphorus release of phosphorus accumulating bacteria and can also realize subsequent aerobic phosphorus absorption so as to achieve the effect of reinforcing biological phosphorus removal, thereby reducing the use of phosphorus removal agents.
Further, main partition plates 13 are arranged on two sides of the ecological wetland tank 2 in the treatment tank 1, the anoxic treatment tank 4, the aerobic treatment tank 5, the flocculation sedimentation tank 6, the ultraviolet disinfection tank 7 and the filtering adsorption tank 8 are respectively arranged on two sides of the main partition plates 13, the volume of the anoxic treatment tank 4 is far smaller than that of the aerobic treatment tank 5, a plurality of groups of flexible fillers 41 are suspended in the anoxic treatment tank 4 at intervals, and anoxic treatment water outlets 42 are formed in the anoxic treatment tank 4 and the partition plates of the aerobic treatment tank 5.
The anoxic treatment tank 4, the aerobic treatment tank 5, the flocculation sedimentation tank 6, the ultraviolet disinfection tank 7 and the filtration adsorption tank 8 are reasonably arranged by utilizing the main partition plate 13. Short-cut nitrification and denitrification are realized in the anoxic treatment tank 4. By utilizing the ecological adaptability (DO is less than 1.0 mg/L) of the nitrifying bacteria (AOB) under the anoxic condition, the volume occupied by the device is reduced, the shorter Hydraulic Retention Time (HRT) is further controlled, the growth and propagation of nitrifying bacteria (NOB) are inhibited, the AOB is promoted to become dominant strain, and NO in the wastewater is realized 2 - Accumulation of N, readily degradable by means of the previous anaerobic sectionOrganic pollutants are used as carbon sources, and denitrification and carbon reduction are directly realized under the action of Denitrifying Bacteria (DB). The technology is capable of reducing 25% of oxygen demand in the nitrification stage and 40% of organic carbon source in the denitrification stage, shortening the reaction time and improving the reaction efficiency, thereby reducing the unit volume or improving the processing capacity. The flexible filler 41 enriches the system microorganism occurrence forms (attachment state and suspension state), increases the system microorganism quality and increases the pollution load of the processing unit.
As shown in fig. 1,3 and 5, in this embodiment, a porous partition plate 51 is disposed in the aerobic treatment tank 5, an inert filler is laid on the porous partition plate 51, aquatic plants are planted on the inert filler, an aerobic treatment water outlet which is communicated with the aerobic treatment tank 5 and the flocculation sedimentation tank 6 is disposed on the main partition plate 13, the aerobic treatment water outlet is located above the porous partition plate 51, a flow guide partition plate 52 and a plurality of moving fillers are vertically disposed below the porous partition plate 51 in the aerobic treatment tank 5, a gap is formed between the upper end of the flow guide partition plate 52 and the porous partition plate 51, a gap is formed between the lower end of the flow guide partition plate 52 and the bottom wall of the aerobic treatment tank 5, the flow guide partition plate 52 divides the aerobic treatment tank 5 into a fluidization ascending area and a fluidization descending area, the fluidization ascending area is located at one side of the flow guide partition plate 52 facing the anoxic treatment water outlet 42, and an aeration pipe 53 is uniformly arranged on the bottom wall of the fluidization ascending area.
Specifically, the aeration pipe 53 extends from the main partition 13 into the equipment room 11 and is connected to an external air source or blower. Inert filler and planting plants in water to create a wetland microenvironment. The inert filler adopts gravel with particle diameter larger than the pore diameter of the porous partition plate 51 to fix aquatic plants, and provide carrier for attaching biological membrane, wherein the aquatic plants are one or more of rhizoma Iridis Tectori, rhizoma Sagittariae Sagittifoliae and rhizoma Acori Calami, and the planting density is controlled at 1 plant/200 cm 2 The aquatic plants are positioned above the biochemical treatment unit, so that the direct exposure of wastewater is avoided, and the effects of odor of biochemical processes are reduced by matching with the adsorption of mobile fillers and the microbial degradation; meanwhile, the aquatic plant grows to absorb and utilize nitrogen and phosphorus nutrition elements in the wastewater, and the plant root system is utilized to provide microorganism attaching space and oxygen therapy energyThe method creates an aerobic-facultative environment, and cooperatively strengthens the purification of organic matters, nitrogen, phosphorus and even toxic and harmful substances.
The width of fluidization ascending area is slightly greater than the width of fluidization descending area, just fluidization descending area is equipped with down guide plate 54, down guide plate 54's upper end with the lateral wall of aerobiotic treatment pond 5 is connected, down guide plate 54's lower extreme is located under the guide plate 52 and with aerobiotic treatment pond 5's diapire is connected, the height of oxygen deficiency treatment delivery port 42 with the lower extreme height of guide plate 52 is unanimous.
And the aerobic treatment tank 5 mainly realizes synchronous nitrification and denitrification and aerobic dephosphorization. The aeration pipe 53 is used to form a fluidization ascending area on one side of the baffle plate 52 and a fluidization descending area on the other side, so that the movable filler, waste liquid and air circularly flow below the porous baffle plate and are fully contacted with each other, the removal effect is enhanced, and the treatment effect is higher.
In this embodiment, the width of the fluidization ascending area is set to be greater than the width of the fluidization descending area, so as to ensure that the liquid can smoothly blow into the upper space of the porous partition plate, and meanwhile, the volume of the fluidization descending area is more similar to that of the anoxic treatment tank, and then the height of the anoxic treatment water outlet 42 is consistent with the height of the lower end of the flow guide partition plate 52, so as to ensure that the inflow water flow and the circulating water flow are mutually pushed against each other in the fluidization ascending area, ensure that the aeration power can smoothly drive the sewage and the movable packing to ascend, avoid the mixed flow or backflow phenomenon, ensure the forward circulation flow of the water flow, and remarkably improve the pollution load and the removal capability of the treatment unit.
Moving the biomembrane attached by the filler can sequentially construct an aerobic-anoxic-anaerobic micro environment from outside to inside, thereby completing the synchronous nitrification and denitrification process on a micro level.
Further, upper guide plates 55 are symmetrically arranged on two sides of the guide plates 52 in the aerobic treatment tank 5, the upper ends of the upper guide plates 55 are abutted to the porous partition plates 51, and the lower ends of the upper guide plates 55 are connected with the side walls of the aerobic treatment tank 5.
The upper baffle 55 provided enhances the flow guiding effect and facilitates the replacement of the porous partition 51 and the inert filler and aquatic plants above. Because the porous partition plate and the inert filler layer arranged above the upper part are blocked and are far away from the aeration pipe, a local anoxic area, especially the upper space of the upper guide plate 55, is formed in the area, so that the macro-level creates favorable conditions for synchronous nitrification and denitrification. Various filler carriers and different dissolved oxygen are utilized for regulation, so that the occurrence forms, biomass and community structures of microorganisms in the system are enriched, and the biodegradation efficiency is enhanced.
The structure can exert the pollution resistance and degradation capability of microorganisms to the greatest extent, and is matched with various filler carriers to strengthen the treatment performance of anaerobic, anoxic and aerobic working sections, reduce carbon, nitrogen and phosphorus as much as possible, reduce the excessive dependence of the system on medicaments and bacteria agents and avoid secondary pollution of sludge.
In this embodiment, the flocculation sedimentation tank 6 mainly realizes suspended matter removal, and simultaneously discharges excess sludge, a sedimentation treatment partition 61 is arranged in the flocculation sedimentation tank 6 perpendicular to the water outlet direction of the sludge outlet, the lower end of the sedimentation treatment partition is provided with a wastewater and sludge channel away from the bottom of the flocculation sedimentation tank, the upper end of the sedimentation treatment partition is flush with the upper edge of the flocculation sedimentation tank 6, suspended matters are sedimented by gravity, or if necessary, a medicament is added to complete flocculation sedimentation, and the sedimented sludge at the bottom of the unit is periodically discharged out of the device through the sludge outlet of the sedimentation treatment unit.
The two opposite side walls of the ultraviolet disinfection tank 7 are respectively provided with a water outlet 71 and a water inlet 72, the water inlet 72 is communicated with the flocculation sedimentation tank 6, the water outlet 71 is communicated with the filtration adsorption tank 8, the height of the water outlet 71 is greater than that of the water inlet 72, and a plurality of ultraviolet disinfection lamps 73 are vertically arranged on the non-perforated side wall of the ultraviolet disinfection tank 7.
The ultraviolet sterilizing lamp 73 kills microorganisms such as pathogens, bacteria, fungi and viruses, and the molecular structure of DNA or RNA in a microorganism organism is destroyed by ultraviolet rays to inactivate or die, so that the sterilizing effect is achieved.
As shown in fig. 1,4 and 6, in this embodiment, a first gravel filter layer 81, a quartz sand filter layer 82, a granular activated carbon filter layer 83, a zeolite filter layer 84 and a second gravel filter layer 85 are sequentially laid in the filtering and adsorbing tank 8 from bottom to top, the particle size of the second gravel filter layer 85 is smaller than the particle size of the first gravel filter layer 81, and aquatic plants are planted on the second gravel filter layer 85.
Specifically, the first gravel filtering layer has the particle size of 30-50 mm and the thickness of 0.2m; the quartz sand filter layer has the particle size of 3-5 mm and the thickness of 0.2m; the particle active carbon filter layer has the particle size of 1-3 mm and the thickness of 0.2m; a zeolite filter layer with the particle size of 1-3 mm and the thickness of 0.2m; and the second gravel filtering layer has the particle size of 5-10 mm and the thickness of 0.2m.
The second gravel pack layer 85 is used for fixing aquatic plants and providing a carrier attached with biological film, wherein the aquatic plants adopt one or more of canna, phyllostachys praecox, and Yudai grass, and the planting density is controlled at 1 plant/100 cm 2 In the disinfection tank, the height of the water outlet 71 is larger than that of the water inlet 72, so that water flow in the filtering and adsorbing tank 8 adopts a mode of up-in-down-out, fillers with different particle sizes and adsorption functions are paved in layers, pollutants in the wastewater are intercepted and purified through the processes of filtering, adsorbing, co-depositing and the like by utilizing the porous structure and physicochemical properties of the surfaces and the interiors of the fillers, and meanwhile, chromaticity is removed, so that suspended matters, heavy metals, antibiotics and the like are removed. The aquatic plants are planted, the form and the structure similar to the artificial wetland are constructed, pollutants such as nitrogen, phosphorus and the like in the wastewater can be directly absorbed and utilized by utilizing plant root systems, the purifying capacity of the units is cooperatively enhanced, and the landscape value of the device is improved.
Furthermore, the water inlet and outlet among the other tanks can realize gravity overflow water outlet through the water level height difference in the treatment tank except for the power supplied by the water pump of the anaerobic treatment unit 3 in the initial section, and additional power supplement is not needed.
In this embodiment, a third gravel filter layer for planting aquatic plants and submerged plants is laid on the bottom wall of the ecological wetland tank 2, the particle size of the third gravel filter layer is consistent with that of the first gravel filter layer 81, water passing holes 14 for communicating the first gravel filter layer 81 and the third gravel filter layer are formed in the partition plate of the filter adsorption tank 8 and the ecological wetland tank 2, and the laying height of the third gravel filter layer, the laying height of the first gravel filter layer 81 and the height of the water passing holes 14 are consistent.
The aquatic plants in the ecological wetland pool 2 adopt dropwort, herba allii fistulosi and the like, and the planting density is controlled at 1 plant/200 cm 2 The submerged plant adopts Sargassum, sargassum horneri, etc., and the planting density is controlled at 1 plant/100 cm 2 . The artificial simulation natural wetland ecosystem is utilized, the construction of characteristic elements of matrixes, microorganisms, plants, water bodies and aquatic animals is combined, meanwhile, the water passing holes 14 correspond to the first gravel filter layer 81 and the third gravel filter layer, so that the ecological wetland tank 2 and the filtering adsorption tank 8 form a subsurface flow and surface flow composite wetland form, water flow is discharged from bottom to top through a water outlet pipe, the ecological wetland tank simulates physical, chemical and biological synergistic effects of natural water ecological filtering, adsorption, plant absorption, microbial decomposition and the like, the comprehensive purification capability of physical and chemical collection and biochemistry is exerted, pollutants such as organic matters, nitrogen and phosphorus are removed, the deep purification of wastewater is realized, and the stable standard emission of wastewater is ensured.
Meanwhile, the unit can be used for checking the effect of each flow treatment working section at the front end, and judging the wastewater treatment effect according to the growth situation of aquatic animals and plants. In addition, the ecological wetland can also obviously improve the landscape value of the device.
Aiming at medium-sized and small-sized pig farms, the annual output is 500-10000, the annual storage is 300-5000, and the discharge amount of the cultivation wastewater is approximately 10-50 m 3 In the range of/d, after the advanced treatment of the treatment tank of the embodiment is adopted, the effluent quality can stably reach BOD 5 ＜30mg/L，COD＜100mg/L，NH 3 N is less than 25mg/L, TN is less than 40mg/L, TP is less than 3mg/L, and meanwhile, the indexes of the death rate of ascarid eggs and the coliform faeces can reach the standard stably.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (7)
1. An integrated device for advanced treatment of live pig breeding wastewater is characterized in that: the ecological wetland treatment device comprises a treatment tank, wherein an ecological wetland tank is arranged in the middle of the treatment tank, an anaerobic treatment unit is arranged in the ecological wetland tank, anoxic treatment tanks, aerobic treatment tanks, flocculation sedimentation tanks, ultraviolet disinfection tanks and filtering adsorption tanks are sequentially arranged on two sides of the ecological wetland tank in the treatment tank according to the water flow direction, the water outlet ends of the anaerobic treatment unit are respectively communicated with the water inlet ends of the anoxic treatment tanks, the water outlet ends of the filtering adsorption tanks are respectively communicated with the water inlet ends of the ecological wetland tank, the anaerobic treatment unit is provided with a water inlet pipe, and the ecological wetland tank is connected with a water outlet pipe;
the anaerobic treatment tank, the aerobic treatment tank, the flocculation sedimentation tank, the ultraviolet disinfection tank and the filtration adsorption tank are respectively arranged on two sides of the main partition board, the volume of the anaerobic treatment tank is far smaller than that of the aerobic treatment tank, a plurality of groups of flexible fillers are suspended in the anaerobic treatment tank at intervals, and anaerobic treatment water outlets are formed in the partition boards of the anaerobic treatment tank and the aerobic treatment tank;
the aerobic treatment tank is internally provided with a porous partition board, inert fillers are paved on the porous partition board, aquatic plants are planted on the inert fillers, an aerobic treatment water outlet which is communicated with the aerobic treatment tank and the flocculation sedimentation tank is arranged on the main partition board, the aerobic treatment water outlet is positioned above the porous partition board, a flow guide partition board and a plurality of movable fillers are vertically arranged below the porous partition board in the aerobic treatment tank, a gap is reserved between the upper end of the flow guide partition board and the porous partition board, a gap is reserved between the lower end of the flow guide partition board and the bottom wall of the aerobic treatment tank, the flow guide partition board divides the aerobic treatment tank into a fluidization ascending area and a fluidization descending area, the fluidization ascending area is positioned on one side of the flow guide partition board facing the anoxic treatment water outlet, and aeration pipes are uniformly distributed on the bottom wall of the fluidization ascending area;
the upper guide plates are symmetrically arranged on two sides of the guide plates in the aerobic treatment tank, the upper ends of the upper guide plates are abutted to the porous partition plates, and the lower ends of the upper guide plates are connected with the side walls of the aerobic treatment tank.
2. The integrated device for advanced treatment of live pig breeding wastewater according to claim 1, wherein: the anaerobic treatment unit comprises an inner cylinder and an outer cylinder, wherein the lower ends of the inner cylinder and the outer cylinder penetrate through the partition boards of the ecological wetland tank, the lower ends of the inner cylinder and the bottom wall of the ecological wetland tank are connected, gaps are reserved between the lower ends of the outer cylinder and the bottom wall of the ecological wetland tank, the side wall of the inner cylinder in the ecological wetland tank is provided with a water inlet pipe, the water inlet pipe extends out of the side wall of the outer cylinder and is connected with an external sewage source, the side wall of the inner cylinder in the gap is provided with a circulating conduit, and the other end of the circulating conduit is provided with a bottom wall which is communicated with the outer cylinder.
3. The integrated device for advanced treatment of live pig breeding wastewater according to claim 2, wherein: the upper end of the outer barrel is provided with a water outlet barrel, a conical three-phase separator which is matched with the outer barrel and the inner barrel is arranged in the water outlet barrel, the upper end of the conical three-phase separator is connected with a gas permeability pipe, the other end of the gas permeability pipe extends out from a top cover of the water outlet barrel, a water outlet weir is arranged outside the conical three-phase separator, and connecting pipes which are connected with the water outlet weir and the anoxic treatment tank are symmetrically arranged on the water outlet barrel.
4. The integrated device for advanced treatment of live pig breeding wastewater according to claim 1, wherein: the width of fluidization ascending area is slightly greater than the width of fluidization descending area, just fluidization descending area is equipped with down the guide plate, down the guide plate the upper end with the lateral wall in aerobiotic treatment pond is connected, down the guide plate the lower extreme be located under the guide plate and with aerobiotic treatment pond's diapire is connected, the height of oxygen deficiency treatment delivery port with the lower extreme highly uniform of guide plate.
5. The integrated device for advanced treatment of live pig breeding wastewater according to claim 1, wherein: the flocculation sedimentation tank is internally provided with a sedimentation treatment baffle plate perpendicular to the water outlet direction of the sludge discharge port, two opposite side walls of the ultraviolet disinfection tank are respectively provided with a water outlet hole and a water inlet hole, the water inlet holes are communicated with the flocculation sedimentation tank, the water outlet holes are communicated with the filtration adsorption tank, the height of the water outlet holes is greater than that of the water inlet holes, and a plurality of rows of ultraviolet disinfection lamps are vertically arranged on the non-perforated side walls of the ultraviolet disinfection tank.
6. The integrated device for advanced treatment of live pig breeding wastewater according to claim 1, wherein: the filter adsorption tank is characterized in that a first gravel filtering layer, a quartz sand filtering layer, a granular activated carbon filtering layer, a zeolite filtering layer and a second gravel filtering layer are sequentially paved from bottom to top, the grain size of the second gravel filtering layer is smaller than that of the first gravel filtering layer, and aquatic plants are planted on the second gravel filtering layer.
7. The integrated device for advanced treatment of live pig breeding wastewater according to claim 6, wherein: the ecological wetland pool is characterized in that a third gravel filtering layer for planting aquatic plants and submerged plants is paved on the bottom wall of the ecological wetland pool, the grain size of the third gravel filtering layer is consistent with that of the first gravel filtering layer, water holes communicated with the first gravel filtering layer and the third gravel filtering layer are formed in a partition plate of the ecological wetland pool, and the paving height of the third gravel filtering layer, the paving height of the first gravel filtering layer and the height of the water holes are consistent.
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