CN218435302U - Pond formula bullfrog breeds processing system of tail-water - Google Patents
Pond formula bullfrog breeds processing system of tail-water Download PDFInfo
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Abstract
A pond-type bullfrog breeding tail water treatment system sequentially comprises a pore plate grid, an adjusting tank, a high-efficiency coagulating sedimentation device, a biological contact oxidation device, a filtering device and a sterilization and disinfection device which are connected into the traditional pond-type bullfrog breeding tail water according to the flowing direction of the tail water; the sludge treatment system is used for dehydrating the sludge; the efficient coagulating sedimentation device is characterized by further comprising a dosing system, wherein the dosing system is used for dosing the efficient coagulating sedimentation device through a dosing pipeline. The problems of large occupied area, low treatment efficiency, high operation cost and high investment in the prior art can be effectively solved.
Description
Technical Field
The utility model relates to a sewage treatment technical field especially relates to a pond formula bullfrog breeds processing system of tail water.
Background
With the rapid development of the bullfrog catering industry in recent years, the bullfrog cultivation is increasing, and the bullfrog cultivation also brings a large amount of bullfrog cultivation tail water. At present, the bullfrog breeding modes mainly comprise two modes: one is a traditional pond type culture mode, and the other is an industrialized shelf type culture mode. The quality of the tail water of the traditional pond culture mode is shown in the following table 1.
TABLE 1 Water quality characteristics of conventional pond-type bullfrog cultivation tail water
The tail water has the following characteristics:
1) The pollutant concentration is low, and the wastewater is typical low-concentration organic wastewater
Because of large water change amount and relatively low culture density, the sewage concentration is low, and the traditional treatment modes such as an activated sludge method and the like are often difficult to operate due to insufficient nutrient substances.
2) Solid pollutants account for a large proportion, and particularly nitrogen-containing pollutants are mainly solid pollutants.
The discharge of the bullfrog breeding tail water is intermittent discharge, the difference of water quality and water quantity in different growth stages is large, and the impact load is large.
In addition, the bullfrog breeding tail water which contains a large amount of pollutants such as bullfrog urine, excrement, germs and the like, uneaten feed, agents for preventing diseases and insect pests and other soluble metabolites is also generated, the watercourse and the downstream water body are often seriously polluted to become a black and odorous water body, and the problem also arouses high attention of relevant departments.
Aiming at the water quality of the tail water of the traditional pond type bullfrog cultivation, because the tail water is similar to the municipal sewage water quality, the prior bullfrog cultivation tail water treatment technology usually adopts the similar municipal sewage treatment processes of 'gravity primary sedimentation/air flotation pretreatment + biochemical process + secondary sedimentation' and the like. The primary sedimentation process and the secondary sedimentation process in the prior art have the problems of large occupied area and low sedimentation efficiency; in addition, the organic load of the tail water of the traditional pond type bullfrog cultivation is lower than that of municipal sewage, the traditional biological contact oxidation or MBR membrane method is mainly used in the existing biochemical process, but the problems that the system occupies a large area, the phosphorus removal effect is poor, a large amount of medicaments such as carbon sources need to be added, the aeration intensity and the like cannot be effectively matched with the water quality regulation, the energy consumption is high, the problems of difficult sludge cultivation, high operation control difficulty, large investment, high operation cost and the like occur, and the development of the bullfrog cultivation industry is limited.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a pond formula bullfrog breeds processing method and system of tail-water through setting up the high-efficient coagulating sedimentation device who contains mixed pond and coagulating basin to set up PAC charge device and PAM charge device and add the medicine respectively to mixed pond and coagulating basin, adopt controllable aeration equipment to carry out regulation and control to biological contact oxidation device's aeration region simultaneously, realize the high-efficiency processing to pond formula bullfrog breeds tail-water.
The utility model provides a technical scheme that its technical problem adopted is: a treatment method of pond type bullfrog breeding tail water sequentially comprises the following steps:
the first step, remove the impurity of large granule in the tail water;
step two, adjusting the tail water;
thirdly, after the adjustment treatment, carrying out chemical phosphorus removal and efficient coagulating sedimentation treatment on the tail water;
the fourth step, the tail water is subjected to denitrification and decarbonization biological contact oxidation treatment;
the fifth step, filter treatment;
sixthly, sterilizing and disinfecting the tail water;
a seventh step, after the fifth step, discharging part of the tail water which reaches the standard, and using the other part of the tail water for cultivation and recycling;
in the fourth step and the fifth step, the generated sludge returns to the second step for regulation treatment and then enters the third step for high-efficiency coagulating sedimentation treatment;
the sludge dewatering treatment comprises a sludge pool collecting step, a sludge dewatering machine drying treatment step and a sludge outward transportation treatment step in sequence;
also comprises a PAC dosing step in the steps of chemical phosphorus removal and high-efficiency coagulating sedimentation treatment, wherein the agent in the PAC dosing step is 2-20% of polyaluminium chloride solution.
Also comprises a PAM dosing step in the chemical phosphorus removal and high-efficiency coagulating sedimentation treatment steps and a PAM dosing step in the sludge dewatering treatment step. The agent in the PAM dosing step is 1-2 per mill polyacrylamide flocculant solution.
Preferably, the chemical phosphorus removal and efficient coagulating sedimentation treatment of the third step is further sequentially subdivided into the following steps: mixing tail water, chemically removing phosphorus, coagulating tail water and precipitating tail water;
preferably, in the fourth step, the aeration area can be controlled (and the size, intensity and interval arrangement of the aeration area can be controlled) by the adjustable aeration device
Preferably, PAC dosing is carried out in the tail water mixing treatment and chemical phosphorus removal steps, and PAM dosing is carried out in the tail water coagulation treatment step.
Preferably, the sludge produced in the tail water sedimentation step is subjected to a collection step in a sludge tank, and another part of the sludge is returned and subjected to the tail water mixing treatment step.
Preferably, a fibrous filter cloth filtration process is used in the fifth step.
Preferably, the fiber filter cloth is 2-10 micron fiber filter cloth.
A pond-type bullfrog breeding tail water treatment system sequentially comprises a pore plate grid, an adjusting tank, a high-efficiency coagulating sedimentation device, a biological contact oxidation device, a filtering device and a sterilization and disinfection device which are connected into the traditional pond-type bullfrog breeding tail water according to the flowing direction of the tail water;
the system comprises a high-efficiency coagulating sedimentation device, a sludge treatment system and a sludge treatment system, wherein the high-efficiency coagulating sedimentation device is arranged in the front of the high-efficiency coagulating sedimentation device, and the sludge treatment system comprises a sludge conveying pipeline, a sludge pool and a sludge dewatering machine which are sequentially arranged in the flowing direction of sludge; a sludge pump is arranged on the sludge conveying pipeline;
the system also comprises a dosing system, wherein the dosing system comprises a PAC dosing device and a PAM dosing device, and the dosing system doses the high-efficiency coagulating sedimentation device through a dosing pipeline; PAM charge device still through adding the medicine pipeline to sludge dewaterer adds the medicine.
Preferably, the efficient coagulating sedimentation device is provided with a mixing tank, a coagulating tank with a stirrer capable of adjusting the stirring speed, a pre-sedimentation-concentration tank, a PAC dosing device, a PAM dosing device and a sludge backflow device in addition to the inclined tube sedimentation device; a drug adding pipeline of the PAC drug adding device is connected to the mixing tank, and the PAC drug adding device adds drugs to the mixing tank; a dosing pipeline of the PAM dosing device is connected to the coagulation tank, and the PAM dosing device doses the drugs into the coagulation tank; the sludge reflux device comprises a sludge reflux pipeline, the sludge reflux pipeline is connected to a sludge inlet of the mixing tank from a sludge discharge port of the pre-settling-concentrating tank, and a sludge reflux pump is further arranged on the sludge reflux pipeline.
Preferably, the filter device is a fiber cloth filter chamber filter device.
Preferably, the biological contact oxidation apparatus comprises: the biochemical tank is also provided with the flaky combined biological filler at certain intervals; a multi-point water inlet and distribution device is arranged at the upper part of the biochemical pool; the bottom of the biochemical pool is provided with an aeration pipe and a controllable aeration device, the aeration pipe is connected with an aeration fan, and the volume, the aeration intensity and the interval position of the nitrification area are controlled by the controllable aeration device.
Preferably, a sludge conveying pipeline is further arranged between the biological contact oxidation device and the regulating reservoir.
Preferably, a sludge conveying pipeline is further arranged between the fiber cloth filter pool filtering device and the adjusting tank.
The treatment method and the treatment system for the pond-type bullfrog breeding tail water can effectively treat the traditional pond-type bullfrog breeding tail water, stably reach the first-class A of pollutant discharge standard of urban sewage treatment plant (GB 18918) and the related discharge standard above, and have the advantages of good and stable effluent quality, no pollution to the environment, water resource saving, high automation degree, low energy consumption, small occupied area, low investment operation cost and the like.
Drawings
Fig. 1, fig. 2 and fig. 3 are schematic views of an embodiment of the present invention. Wherein, FIG. 1 is a process flow diagram, FIG. 2 is a schematic structural diagram of a high-efficiency coagulating sedimentation device, and FIG. 3 is a schematic structural diagram of a biological contact oxidation device.
In the figure:
1. an orifice plate grid; 2. a regulating tank; 3. a high-efficiency coagulating sedimentation device; 4. (baffled multistage a/O) biological contact oxidation unit; 5. a fiber cloth filter device; 6. a sterilization and disinfection device; 7. a sludge treatment system; 701. a sludge tank; 702. a sludge dewatering device; 8. a dosing device; a PAC dosing device; 802.pam dosing device. 301. A mixing tank; 302. a coagulation tank; 303. a pre-settling-concentrating tank; 304. an inclined tube; 305 a mixing tank agitator; 306. a speed-adjustable coagulation tank stirrer; 307. a sludge reflux device; 308. a sludge discharge pump. 401. A sheet-like composite biological filler; 402 a multi-point water inlet and distribution device; 403. aeration device with adjustable aeration area and strength; 404. a tank wall; 405. a denitrification zone; 406 nitration zone.
Detailed Description
Fig. 1, fig. 2 and fig. 3 are schematic views of an embodiment of a pond-type bullfrog cultivation tail water treatment system provided by the present invention. In the figure, as shown in figure 1, the treatment system for pond type bullfrog cultivation tail water comprises a pore plate grating 1, an adjusting tank 2, a high-efficiency coagulating sedimentation device 3, a biological contact oxidation device 4, a fiber cloth filter tank 5, a sterilization and disinfection device 6 and a sludge treatment system 7 which are connected in sequence. The tail water of traditional pond type bullfrog cultivation firstly enters an orifice plate grid 1 to remove large-particle impurities, and then enters an adjusting tank 2 to be homogenized and mixed. Tail water after stabilizing and homogenizing water quality in the regulating tank 2 enters the high-efficiency coagulating sedimentation device 3 to carry out solid pollutant precipitation separation and chemically remove phosphorus pollutants, supernatant in the high-efficiency coagulating sedimentation device 3 enters the biological contact oxidation device 4 to degrade and remove soluble pollutants such as COD (chemical oxygen demand), TN (total nitrogen) and the like, effluent of the biological contact oxidation device 4 enters the fiber filter cloth filter tank 5 to filter and remove a small amount of biomembranes falling off from the biological contact oxidation device 4 contained in the effluent, and effluent of the fiber filter cloth filter tank 5 enters the sterilization and disinfection device 6 to be sterilized and disinfected and then recycled to the bullfrog cultivation pond or discharged after reaching the standard.
As shown in fig. 2, the high efficiency coagulating sedimentation device 3 of the treatment system and process comprises a mixing tank 301, a coagulating tank 302, and a pre-settling-concentrating tank 303 which are connected in sequence, wherein an inclined pipe 304 is installed at the middle upper part of the pre-settling-concentrating tank 303, and a sludge reflux device 307 and a sludge discharge pump 308 which are connected in parallel are installed at a sludge discharge port at the bottom of the pre-settling-concentrating tank 303. The sludge reflux device 307 is connected with the mixing tank 301, and can reflux part of sludge to the mixing tank 301. The device has the advantages that the sludge concentration in the high-efficiency coagulating sedimentation device 3 can be maintained, and the returned sludge is used as the crystal seed to improve the coagulation effect. The mixing tank 301 is also provided with a mixing tank stirrer 305, and the coagulation tank 302 is provided with a speed-adjustable coagulation tank stirrer 306, and the advantage is that the speed-adjustable coagulation tank stirrer 306 arranged in the coagulation tank 302 can adjust the rotating speed of the speed-adjustable coagulation tank stirrer 306 according to the size and strength of flocs in the coagulation tank 302, so as to enhance the flocculation effect.
As shown in fig. 1, the sludge treatment system 7 of the treatment system and the process comprises a sludge tank 701 and a sludge dewatering device 702 which are connected in sequence; the sludge tank 701 is connected with a sludge discharge pump 308 of the high-efficiency coagulating sedimentation device 3 and is connected with sludge precipitated in the pre-precipitation-concentration tank 303 of the high-efficiency coagulating sedimentation device 3. The sludge in the sludge tank 701 is pumped out to a sludge dewatering device 702 for dewatering treatment until the water content is below 80%, and then the sludge is transported to the outside for treatment.
As shown in FIG. 1, the treatment system and process is provided with a dosing device 8, including a PAC dosing device 801 and a PAM dosing device 802. The PAC dosing device 801 is connected with the mixing tank 301 in the high-efficiency coagulating sedimentation device 3, and a dosing pump, a flow control valve and a flow sensor are arranged on a connected dosing pipeline, so that the PAC dosing amount can be adjusted according to the phosphorus content and the solid pollutant concentration of tail water entering the high-efficiency coagulating sedimentation device 3; the PAM dosing device 802 is respectively connected with the coagulation tank 302 of the high-efficiency coagulation sedimentation device 3 and the sludge dewatering device 702 of the sludge treatment system 7, and a dosing pump, a flow control valve and a flow sensor are also arranged on a dosing pipeline connected with the PAM dosing device 802, so that the PAM dosing quantity can be adjusted by a pipeline connected with the coagulation tank 302 of the high-efficiency coagulation sedimentation device 3 according to the sludge concentration and the sedimentation condition in the coagulation tank 302 of the high-efficiency coagulation sedimentation device 3, and the flocculation effect is enhanced; the pipeline connected with the sludge dewatering device 702 of the sludge treatment system 7 adjusts the dosage of PAM according to the sludge amount and the water content in the sludge dewatering device 702, thereby improving the sludge dewatering quality and efficiency.
As shown in FIG. 3, the biological contact oxidation device 4 comprises a sheet-shaped combined biological filler 401, a multi-point water inlet and distribution device 402, an aeration device 403 with adjustable aeration area and strength, a pool wall 404, a denitrification area 405 and a nitrification area 406. The sheet-shaped combined biological filler 401 is arranged in a biochemical pool enclosed by a pool wall 404, and the biochemical pool is divided into a plurality of areas; the aeration devices 403 with the size and the intensity of the aeration area arranged at the bottom of the biological contact oxidation device 4 are opened or closed, so that the separated areas become functional areas of the denitrification areas 405 and the nitrification areas 406; in addition, because the nitrification liquid gas-lift self-reflux is formed in the denitrification area 405 and the nitrification area 406 due to the gas content, a nitrification liquid reflux pump is not needed, the reflux energy consumption can be reduced, and the water quality can be self-adapted. The multipoint water inlet and distribution device 402 is arranged at the upper part of the biological contact oxidation device 4, and can distribute inlet water to the plurality of separated denitrification areas 405 and nitrification areas 406, and the inlet water flow and the position of each denitrification area 405 and nitrification area 406 can be changed by adjusting the valve of each branch pipe of the multipoint water inlet and distribution device 402, so that the treatment load of each denitrification area 405 and nitrification area 406 in the biological contact oxidation device 4 can be reasonably distributed according to the inlet water quality.
The residual biochemical sludge discharge ports of the biological contact oxidation device 4 and the fiber cloth filter device 5 are also connected with the regulating tank 2, and the residual biochemical sludge and tail water of the biological contact oxidation device 4 and the fiber cloth filter device 5 are mixed in the regulating tank 2 and then enter the high-efficiency coagulating sedimentation device 3 for coagulating sedimentation.
This patent key point lies in breeding the quality of water characteristics of tail water to traditional pool formula bullfrog, with the reasonable integration of current technology together, through the system and technology of "orifice plate grid + equalizing basin + high-efficient coagulating sedimentation device + biological contact oxidation device + fibre filter cloth filter equipment + disinfection and isolation device", handles traditional pool formula bullfrog and breeds the tail water and can stably reach "urban sewage treatment plant pollutant emission standard" (GB 18918) one-level A and above relevant emission standard and discharge or retrieval and utilization bullfrog and breed. Compared with the prior art, the method can reduce the occupied area and reduce the operation cost and investment. The method avoids the discharge of pollutants, saves water resources, reduces the cost of the water treatment for the bullfrog cultivation, and promotes the healthy development of the bullfrog cultivation industry.
The above only is the embodiment of this patent, and not the restriction of the patent scope of the present invention, all utilize the equivalent structure or equivalent flow transform that the content of the present invention specification and drawings did, or directly or indirectly use in other relevant technical fields, all including in the same way the patent protection scope of the present invention.
Claims (6)
1. A pond-type bullfrog breeding tail water treatment system is characterized by sequentially comprising a pore plate grid, an adjusting tank, a high-efficiency coagulating sedimentation device, a biological contact oxidation device, a filtering device and a sterilization and disinfection device which are connected into the traditional pond-type bullfrog breeding tail water according to the flowing direction of the tail water;
the system comprises a high-efficiency coagulating sedimentation device, a sludge treatment system and a sludge dewatering device, wherein the high-efficiency coagulating sedimentation device is arranged in the high-efficiency coagulating sedimentation device and comprises a sludge conveying pipeline, a sludge pool and a sludge dewatering machine which are sequentially arranged in the flowing direction of the sludge; a sludge pump is arranged on the sludge conveying pipeline;
the system also comprises a dosing system, wherein the dosing system comprises a PAC dosing device and a PAM dosing device, and the dosing system doses the high-efficiency coagulating sedimentation device through a dosing pipeline; PAM charge device still through adding the medicine pipeline to sludge dewaterer adds the medicine.
2. The pond-type bullfrog culturing tail water treatment system according to claim 1, characterized in that the high-efficiency coagulating sedimentation device is provided with a mixing tank, a coagulating tank with a stirrer capable of adjusting stirring speed, a pre-settling-concentrating tank, a PAC dosing device, a PAM dosing device and a sludge reflux device in addition to the inclined tube sedimentation device; a drug adding pipeline of the PAC drug adding device is connected to the mixing tank, and the PAC drug adding device adds drugs to the mixing tank; a dosing pipeline of the PAM dosing device is connected to the coagulation tank, and the PAM dosing device doses the drugs into the coagulation tank; the sludge reflux device comprises a sludge reflux pipeline, the sludge reflux pipeline is connected to a sludge inlet of the mixing tank from a sludge discharge port of the pre-settling-concentrating tank, and a sludge reflux pump is further arranged on the sludge reflux pipeline.
3. The system for treating tail water from bullfrog cultivation in pond of claim 1, wherein the filtering device is a fiber cloth filter.
4. The system for treating the tail water of the pond-type bullfrog culture according to claim 1, characterized in that the biological contact oxidation device comprises: the biochemical tank is also provided with a sheet-shaped combined biological filler at a certain interval to divide the biochemical tank into a plurality of nitrification areas and denitrification areas; the bottom of the biochemical pool is provided with a uniform aeration pipe and a controllable aeration device, the aeration pipe is connected with an aeration fan, and the volume, the aeration strength and the interval position of the nitrification area can be controlled by the controllable aeration device; the upper part of the biochemical pool is provided with a multi-point water inlet and distribution device.
5. The system for treating the tail water generated in the pond-type bullfrog cultivation according to claim 1, wherein a sludge conveying pipeline is further arranged between the biological contact oxidation device and the regulating reservoir.
6. The system for treating the tail water generated in the pond-type bullfrog cultivation according to claim 3, wherein a sludge conveying pipeline is further arranged between the fiber cloth filter tank filtering device and the adjusting tank.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115571996A (en) * | 2022-07-08 | 2023-01-06 | 深圳能源资源综合开发有限公司 | Method and system for treating pond type bullfrog breeding tail water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115571996A (en) * | 2022-07-08 | 2023-01-06 | 深圳能源资源综合开发有限公司 | Method and system for treating pond type bullfrog breeding tail water |
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