CN118791194B

CN118791194B - Green low-carbon high-density double-circulation aquaculture water treatment system

Info

Publication number: CN118791194B
Application number: CN202411270958.2A
Authority: CN
Inventors: 张东厚; 秦佳涛; 秦兴杨; 张子昂
Original assignee: Anhui Jingdong Ecological Technology Co ltd
Current assignee: Anhui Zhongke Jingdong Ecological Agriculture Technology Development Co.,Ltd.
Priority date: 2024-09-11
Filing date: 2024-09-11
Publication date: 2024-12-03
Anticipated expiration: 2044-09-11
Also published as: CN118791194A

Abstract

The invention discloses a green, low-carbon, high-density double-circulation aquaculture water treatment system, and belongs to the technical field of aquaculture. The system comprises an aquaculture pond, a floating organic filtration pond, a microfilter, a trickling filter, a primary sedimentation pond, a biodegradation pond, a biological sedimentation pond, a micro-nano ozone pure oxygen aeration pond, an aerated biological enhancement pond and an ultraviolet sterilizer, so that the water quality treatment efficiency is high and the treatment effect is good. The multi-stage treatment process and high-efficiency biological purification technology are adopted to significantly improve the purification effect of aquaculture water, realize the comprehensive removal of pollutants and harmful substances in the water, achieve zero emission and efficient water saving, and realize zero emission of aquaculture wastewater and more than 95% of water resource recycling through a closed cycle design and a multi-stage treatment process, thereby significantly reducing water resource consumption.

Description

Green low-carbon high-density double-circulation aquaculture water treatment system

Technical Field

The invention belongs to the technical field of aquaculture, and particularly relates to a green low-carbon high-density double-circulation aquaculture water treatment system.

Background

The aquaculture industry is characterized in that aquatic economic animal and plant cultivation is performed by using aquaculture technology and facilities according to ecological habits of cultivation objects and requirements on water area environmental conditions in water areas where human beings can supply cultivation, including planting. Is one of the agricultural production departments.

Traditional aquaculture basically adopts a high-frequency water changing mode, waste water is directly discharged into the external environment, a large amount of water resources are wasted, bait fish is fed from the outside generally according to needs, meanwhile, modern aquaculture industry tends to intensify more and more, and a large amount of feed, fertilizer and chemical medicines are used, so that huge pressure is brought to the aquaculture water body, the metabolic capacity of a natural purification ecological system on which general aquaculture depends is exceeded, a large amount of organic matters cannot be decomposed completely, and pollution to the water body is caused. The traditional water treatment mode is to inject fresh water after the wastewater is completely discharged, and the treatment mode is extensive and does not meet the requirements of modern aquaculture. Therefore, searching for a water treatment method for the aquaculture, which has the advantages of low facility investment, low running cost and high treatment efficiency, becomes a key point for solving the pollution of the aquaculture, so that the water in the aquaculture pond is self-circulated and clean, and the aquaculture water is recycled.

In the circulating water culture system, the water resource utilization effect is improved through the cyclic utilization of the water resource, the culture density is improved, and the tail water discharge amount is reduced. However, the concentration of organic wastes such as residual baits, feces and the like can be increased along with the increase of the culture density, and the environment is greatly harmed. In the prior art, the excrement such as the residual bait and the excrement in fish culture is mainly collected by artificial siphonage, but the method can only be suitable for experimental small water body culture environments and is difficult to popularize in actual culture production. The calculation of the residual baits can only be carried out by a manual and macroscopic observation method, the feeding amount is roughly adjusted, and great uncertainty exists in the calculation of the cultivation cost and the bait coefficient. The research on the utilization rate of fish to feed and the influence of residual bait and feces on water quality are important matters in the artificial breeding process, so that the related research on the subsequent treatment of residual bait and feces in fish breeding has gradually attracted attention and attention of the industry personnel. With the global increased awareness of food safety and environmental protection, aquaculture has faced unprecedented challenges. The traditional cultivation mode not only consumes a large amount of water resources, but also can cause water pollution and ecological damage.

The existing indoor water circulation culture technology is widely applied in the field of aquaculture, but most systems still have obvious defects, the existing scheme adopts traditional water treatment processes, such as physical filtration, chemical treatment, biodegradation and other combination modes, suspended matters, organic matters and harmful substances in water are removed through a multistage filtration device, and although the water quality can be purified to a certain extent, the problems of low treatment efficiency, high energy consumption, large occupied area, high operation cost and the like often exist, and part of systems cannot realize real zero emission, so that the environmental pollution problem is still outstanding.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.

In order to solve the problems that most of the systems proposed in the background technology still have significant defects, the traditional water treatment processes, such as physical filtration, chemical treatment, biodegradation and other combined modes, are mostly adopted in the existing scheme, suspended matters, organic matters and harmful matters in the water body are removed through a multi-stage filtration device, and although the water quality can be purified to a certain extent, the problems of low treatment efficiency, higher energy consumption, large occupied area, high operation cost and the like often exist, and part of the systems cannot realize real zero emission, so that the problem of environmental pollution still stands out.

A green low-carbon high-density dual-circulation aquaculture water treatment system comprises an aquaculture pond, wherein aquaculture water in the aquaculture pond enters the interior of a floating organic filter pond, suspended matters and organic matters are primarily removed through the floating organic filter pond, water passing through the floating organic filter pond enters a micro-filter to further remove the suspended matters and the organic matters, water passing through the micro-filter enters a trickling filter tower, the water freely falls from the top of the tower to a filter bed in the tower, water discharged from the bottom of the trickling filter tower enters a primary sedimentation tank to be primarily precipitated, the precipitated water enters a biodegradation tank, biological bacterial groups in the biodegradation tank absorb and degrade pollutants in the water and then enter a biological sedimentation tank to be precipitated again, suspended matters in the water are precipitated, the precipitated water enters a micro-nano ozone pure oxygen aeration tank to be oxygenated and then enter an aeration biological strengthening tank, the method comprises deep enhanced degradation and removal of residual pollutants in water, circulating the water into a culture pond after passing through an ultraviolet sterilizer, wherein a trickling filtration tower comprises an outer tower body, a support base is fixedly connected to the bottom of the outer tower body, a plurality of filler placement boxes are inserted on the outer tower body, composite filter materials are placed in the filler placement boxes, a top water tank is installed at the top of the outer tower body, a water inlet pipe is detachably connected to the outer wall of the top water tank, the filler placement boxes comprise placement trays, the composite filter materials are placed in the placement trays, an inserted outer edge is fixedly connected to the outer wall of the placement trays, a holding handle is fixedly connected to the outer wall of the inserted outer edge, two sides of the inserted outer edge penetrate through mounting bolts and are in threaded connection with the outer tower body, a pinnacle filter screen is arranged in the placement trays, the composite filter materials are positioned between the pinnacle filter screen and the bottoms of the placement trays, the bottom of the pinnacle filter screen and the placing tray are provided with a plurality of holes, and the center of the pinnacle filter screen is provided with an upward arched tip.

Preferably, the top of outside tower body is detachably connected with sealed top cap, is provided with the through-hole on the sealed top cap, and the bottom of top water tank is detachably connected with the outlet pipe, and the outlet pipe passes the through-hole, and the end of outlet pipe is detachably connected with the water distribution dish.

Preferably, the top of sealed top cap is provided with the air vent, and the upper end of supporting the base is provided with the water conservancy diversion inclined plane, and the outer wall connection of outside tower body has the discharge pipe, supports the embedded air-blower that installs of base, and the end of giving vent to anger of air-blower can be dismantled and be connected with the outlet duct, and the outlet duct passes the inboard bottom of outside tower body, and the inlet end of air-blower can be dismantled and be connected with the intake pipe, and the outer wall of supporting the base is worn out to the intake pipe.

Preferably, the mounting shell is embedded to be installed on the support base, the mounting shell separates the intake pipe, one side upper end fixedly connected with bulge board of support base, the outer wall of bulge board passes fastening bolt, fastening bolt and support base threaded connection are provided with a plurality of jack grooves on the mounting shell, the inside grafting of every jack groove has the plugboard, can dismantle on every plugboard and be connected with the filter screen, the inner wall that every plugboard is close to the upper end is provided with spacing flange, the bottom of every plugboard and the outer wall that is close to the upper end are provided with the limiting plate.

Preferably, the bottom both sides of placing the tray fixedly connected with supports the swash plate, and both sides support the upper end of swash plate to the center of placing the tray and gather and connect, and both sides support the up end both sides of the pointed end of swash plate fixedly connected with support riser, both sides support the upper end fixedly connected with hollow screwed pipe of riser, the center department fixedly connected with internal thread pipe of peak filter screen, internal thread pipe and hollow screwed pipe threaded connection.

Preferably, the sediments at the bottoms of the primary sedimentation tank and the biological sedimentation tank enter a sludge collecting tank to generate the organic fertilizer.

Preferably, the floating organic filter tank comprises a filter medium, a tank body, a supporting material and mounting accessories, the water body is filtered by the filter medium, organic matters in the water flow are decomposed by microbial communities on the filter medium as nutrient sources, and a layer of biological film is gradually formed on the surface of the filter medium.

Preferably, the primary sedimentation tank comprises a first inclined tube and a mud bucket, the water flow speed is gradually reduced in the tank, suspended matters begin to be settled under the action of gravity, heavier particles quickly sink to the bottom of the tank to form a sludge layer, the lighter particles are suspended in water for a period of time and then settled, and clear water flows out from the upper part to enter the biodegradation tank.

Compared with the prior art, the invention has the beneficial effects that:

1. The water quality treatment efficiency is high, the treatment effect is good through the setting of the culture pond, the planktonic organic filter pond, the micro-filter, the trickling filter tower, the primary sedimentation tank, the biodegradation tank, the biological sedimentation tank, the micro-nano ozone pure oxygen aeration tank, the aeration biological strengthening tank and the ultraviolet sterilizer, the purification effect of the culture water body is obviously improved by adopting a multistage treatment process and a high-efficiency biological purification technology, the comprehensive removal of pollutants and harmful substances in the water body is realized, the zero emission and the high-efficiency water saving are realized, the zero emission of the culture wastewater and the water resource recycling of more than 95% are realized by adopting a closed circulation design and a multistage treatment process, and the water resource consumption is obviously reduced.

2. The water body enters the water tank at the top of the trickling filter through the water inlet pipe, falls to the place box of each filler, reoxygenates the aquaculture water body and removes carbon dioxide in the water body in a drop way, the water body sequentially passes through the place box of each filler through gravity flow, sewage contacts with a biological film on the surface of the composite filter material, and the biological film adsorbs, absorbs, counteracts pollutants in the sewage, so that oxygenation, decarburization and pollutant removal of the water body are completed.

3. The composite filter material placed inside the packing placement box can be uniformly contacted with the water distribution disc, so that the oxygenation, decarbonization and pollutant removal effects on the water body are better.

4. External air is sucked in and blown into the external tower body through the set blower, and the blown air increases the air in the trickling filter tower to exchange with the outside, so that the reoxygenation effect is increased.

5. The air that gets into outside through a plurality of filter screens that set up can be filtered, avoids outside impurity to get into the inside of outside tower body, can change the filter screen through taking out the plugboard.

6. The center of the pointed filter screen is provided with the pointed end which is arched upwards, so that the composite filter material is positioned between the pointed filter screen and the placement tray in a conical manner, the contact area with the water body can be increased, and the filtering effect is better.

Drawings

FIG. 1 is a schematic flow diagram of a green low-carbon high-density double-circulation aquaculture water treatment system according to the present invention;

FIG. 2 is a schematic diagram of a green low-carbon high-density double-circulation aquaculture water treatment system frame according to the present invention;

FIG. 3 is a schematic diagram of a trickling filter tower according to the present invention;

FIG. 4 is a schematic cross-sectional view of the outer shell of the present invention;

FIG. 5 is a schematic view of the mounting housing structure of the present invention;

FIG. 6 is a schematic view of a plug board inserted into a socket of the present invention;

FIG. 7 is a schematic view of the top tank of the present invention;

FIG. 8 is a schematic view of a packing box according to the present invention;

FIG. 9 is a schematic view of the structure of the supporting sloping plate and the supporting vertical plate in the present invention;

FIG. 10 is a schematic cross-sectional view of a packing box according to the present invention.

The correspondence between the reference numerals and the component names in the drawings is as follows:

1. 101, a filter medium;

2. A micro-filter;

3. The drip filtration tower, 301, the composite filter material, 31, the outer tower body, 311, the support base, 312, the sealing top cover, 313, the ventilation hole, 314, the through hole, 315, the blower, 316, the air inlet pipe, 317, the air outlet pipe, 319, the diversion inclined plane, 3110, the discharge pipe, 3111, the installation shell, 3112, the protruding plate, 3113, the fastening bolt, 3114, the plugboard, 3115, the filter screen, 3116, the limit plate, 3117, the limit flange, 3118, the plug-in groove, 32, the packing box, 321, the plug-in outer edge, 322, the placement tray, 323, the peak filter screen, 324, the installation bolt, 325, the holding handle, 326, the support inclined plate, 327, the hollow threaded pipe, 328, the support vertical plate, 329, the inner threaded pipe, 33, the top water tank, 331, the water inlet pipe, 332, the water outlet pipe, 333, the water distribution plate;

4. 401, a first inclined tube;

5. the biological degradation tank is 501, fluidized bed filler is 502, and the first aeration disc is provided;

6. the biological sedimentation tank comprises 601, a second inclined tube, 602 and filler;

7. a micro-nano ozone pure oxygen aeration tank, 701, an ozone generator, 702, a pure oxygen generator;

8. the aeration biological strengthening tank is provided with 801, combined filler, 802 and a second aeration disc;

9. an ultraviolet sterilizer;

10. A culture pond;

11. A sludge collection tank.

Detailed Description

In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. The present invention provides the following examples.

As shown in FIG. 1, which is a schematic flow chart of a green low-carbon high-density double-circulation aquaculture water treatment system of a preferred embodiment of the invention, the double-circulation aquaculture water treatment system of the embodiment comprises an aquaculture pond 10, aquaculture water in the aquaculture pond 10 enters the interior of a floating organic filter pond 1, suspended matters and organic matters are primarily removed through the floating organic filter pond 1, water passing through the floating organic filter pond 1 enters a micro-filter 2 for further removal of suspended matters and organic matters, water passing through the micro-filter 2 enters a trickling filter tower 3, the water freely falls from the top of the tower to a filter layer in the tower, water discharged from the bottom of the trickling filter tower 3 enters a primary sedimentation pond 4 for primary sedimentation, the precipitated water enters a biodegradation pond 5, pollutants in the water are absorbed and degraded by biological flora in the biodegradation pond 5 and then enter a biological sedimentation pond 6 for secondary sedimentation, the suspended matters in the water body are precipitated, the precipitated water body enters a micro-nano ozone pure oxygen aeration tank 7 for oxygenation and aeration and then enters an aeration biological strengthening tank 8 for deep strengthening degradation and removal of residual pollutants in the water body, and finally the water body is circulated into a culture tank 10 after passing through an ultraviolet sterilizer 9, in the embodiment, the water quality treatment efficiency is high, the treatment effect is good by the arrangement of the culture tank 10, a floating organic filter tank 1, a micro-filter 2, a trickling filter 3, a primary sedimentation tank 4, a biological degradation tank 5, a biological sedimentation tank 6, the micro-nano ozone pure oxygen aeration tank 7, the aeration biological strengthening tank 8 and the ultraviolet sterilizer 9, the water quality treatment effect is obviously improved by adopting a multistage treatment process and an efficient biological purification technology, the comprehensive removal of pollutants and harmful matters in the water body is realized, the zero emission and the high efficiency are saved, and the water is saved by the closed circulation design and multistage treatment flow, realizes zero discharge of the cultivation wastewater and cyclic utilization of water resources up to more than 95%, and remarkably reduces water resource consumption.

It is worth noting that when the water flow passes through the ultraviolet sterilizer 9, the water flow passes through the ultraviolet irradiation area and receives ultraviolet irradiation with enough dosage, so that the sterilization process is completed, unlike a chemical disinfectant, the ultraviolet sterilization does not need to add any chemical substances into the water body, secondary pollution and side effects which are possibly generated are avoided, meanwhile, any residues are not left after the ultraviolet irradiation, the purification and the safety of the water body in the subsequent culture pond are guaranteed, bacteria, viruses and microorganisms in the water body are effectively killed after the water body passes through the ultraviolet sterilizer, and finally clean water is circulated into the culture pond 10.

As shown in fig. 1, the sediments at the bottoms of the primary sedimentation tank 4 and the biological sedimentation tank 6 enter a sludge collecting tank 11 to generate organic fertilizer, so that the full utilization of the sediments can be realized.

As shown in fig. 2, which is a schematic diagram of a frame of a green low-carbon high-density double-circulation aquaculture water treatment system in this embodiment, the floating organic filter tank 1 includes a filter medium 101, a tank body, a supporting material and an installation fitting, the water body is physically intercepted by the filter medium 101, most suspended matters are removed, the organic matters in the water flow are decomposed by a microbial community on the filter medium as a nutrition source, biological purification is realized, a layer of biological film is gradually formed on the surface of the filter medium, in this embodiment, the degradation capability to the organic matters is further enhanced by gradually forming a layer of biological film on the surface of the filter medium, and the aquaculture water body is primarily purified by combining physical filtration and biological purification.

As shown in fig. 2, the micro-filter 2 comprises a filter screen, a driving system and a shell support, the driving system drives the filter screen to rotate at a certain speed, impurities such as suspended matters, tiny particles and the like in a water body are effectively intercepted and attached to the screen, the intercepted impurities gradually accumulate and slide to a sewage collecting area, clean water flows out through the screen, and in the embodiment, the suspended matters, the tiny particles, partial bacteria and the like in the water body are effectively intercepted and removed through physical screening.

As shown in fig. 2, the primary sedimentation tank 4 includes a first inclined tube 401, a mud bucket, etc., the water flow speed gradually decreases in the tank, suspended matters begin to settle due to the action of gravity, heavier particles quickly sink to the bottom of the tank to form a sludge layer, lighter particles possibly suspend in water for a period of time and then settle again, clear water flows out from the upper part and enters the biodegradation tank 5, in this embodiment, the sludge settled in the primary sedimentation tank 4 is collected through the mud bucket at the bottom and is conveyed to the sludge collection tank 11 for centralized treatment, and finally organic fertilizer is generated.

As shown in fig. 2, the biodegradation tank 5 includes a fluidized bed packing 501 and a first aeration tray 502, pollutants in the water body are adsorbed and decomposed by microorganisms attached to the fluidized bed packing 501, the aerobic microorganisms decompose the organic matters into carbon dioxide and water under the condition of sufficient dissolved oxygen, meanwhile, ammonia nitrogen is utilized to synthesize self cell substances, anaerobic or facultative anaerobic microorganisms possibly perform denitrification in an anoxic area inside the fluidized bed packing 501, nitrate is reduced to nitrogen and released into the atmosphere, and nitrogen load in the water body is reduced.

As shown in fig. 2, the biological sedimentation tank 6 comprises a second inclined tube 601, a filler 602 and a mud bucket, the filler 602 is filled in the inclined tube, suspended matters in the water body are adsorbed and trapped by a biological film growing on the surface of the filler 602, residual suspended matters and small-particle organic matters in the water body are further removed, the sedimentation effect is enhanced, the water quality of effluent is improved, the water body then enters the micro-nano ozone pure oxygen aeration tank 7, in the embodiment, the sludge settled in the biological sedimentation tank 6 is collected through the mud bucket at the bottom and is conveyed to the sludge collection tank 11 for centralized treatment, and finally the organic fertilizer is generated.

As shown in fig. 2, the micro-nano ozone pure oxygen aeration tank 7 comprises an ozone generator 701, a pure oxygen generator 702, a gas distribution system and an aeration device, wherein the ozone generator 701 and the pure oxygen generator 702 generate high-concentration ozone gas and pure oxygen gas, the gas distribution system enables the ozone gas and the pure oxygen gas to enter the tank to be matched with the aeration device to be dispersed into a large number of tiny bubbles, the bubbles rise in water to fully contact with a water body to perform oxidation reaction, in the embodiment, ozone can destroy cell walls of bacteria and viruses to enable the bacteria and viruses to lose activity, and meanwhile, the ozone can also perform chain reaction with organic matters in the water body to decompose the ozone gas and the pure oxygen gas into harmless substances such as carbon dioxide and water. The water-supply device can also play a role in sterilizing and purifying water when a great amount of dissolved oxygen is enriched in the water-supply body.

As shown in fig. 2, the aeration bio-augmentation tank 8 comprises a tank body, a combined filler 801, a second aeration disc 802 and the like, the water body is fully contacted with microorganisms on the combined filler 801 in the tank body, and the microorganisms adsorb, absorb and digest pollutants in the water body, so that the water body is further purified.

As shown in fig. 2, the water inlet mode of the culture pond 10 is bottom plug flow type water inlet, water enters from the bottom of the culture pond 10, three-surface plug flow type flow is formed after entering the culture pond, and the bottom of the culture pond is of an inclined structure.

As shown in fig. 2 and fig. 3, the trickling filtration tower 3 includes an outer tower body 31, a support base 311 is fixedly connected to the bottom of the outer tower body 31, a plurality of packing placement boxes 32 are inserted on the outer tower body 31, a composite filter material 301 is placed in each packing placement box 32, a top water tank 33 is installed at the top of the outer tower body 31, a water inlet pipe 331 is detachably connected to the outer wall of the top water tank 33, in this embodiment, water enters the top water tank 33 of the trickling filtration tower 3 through the water inlet pipe 331, falls to each packing placement box 32, reoxygenation is performed on the aquaculture water through a water fall mode, the water sequentially passes through each packing placement box 32 through gravity flow, sewage contacts with a biological film on the surface of the composite filter material 301, and the biological film adsorbs, absorbs, counteracts the pollutants in the sewage, and the like, thereby completing oxygenation of the water and removal of the pollutants.

As shown in fig. 4 and 7, the top of the outer tower body 31 is detachably connected with a sealing top cover 312, a through hole 314 is provided on the sealing top cover 312, a water outlet pipe 332 is detachably connected with the bottom of the top water tank 33, the water outlet pipe 332 passes through the through hole 314, the tail end of the water outlet pipe 332 is detachably connected with a water distribution plate 333, in this embodiment, the water body can uniformly contact the composite filter material 301 placed inside the packing placement box 32 through the water distribution plate 333, so that the oxygenation, decarbonization and pollutant removal effects on the water body are better.

As shown in fig. 4, in order to avoid that the composite filter material 301 is blocked after long-time filtration and water cannot pass through, in this embodiment, the top of the seal top cover 312 is provided with an air vent 313, the upper end of the support base 311 is provided with a diversion inclined plane 319, the outer wall of the outer tower body 31 is connected with a discharge pipe 3110, the support base 311 is internally provided with a blower 315, the air outlet end of the blower 315 is detachably connected with an air outlet pipe 317, the air outlet pipe 317 passes through the inner bottom of the outer tower body 31, the air inlet end of the blower 315 is detachably connected with an air inlet pipe 316, the air inlet pipe 316 passes through the outer wall of the support base 311, in this embodiment, the blower 315 is started to suck external air and blow in the outer tower body 31, and the blown air increases the exchange between the air inside the drip filter tower 3 and the outside, thereby increasing the reoxygenation effect.

As shown in fig. 5 and 6, a mounting housing 3111 is mounted on the support base 311 in an embedded manner, the mounting housing 3111 separates the air inlet pipe 316, a protruding plate 3112 is fixedly connected to one side upper end of the support base 311, an outer wall of the protruding plate 3112 passes through a fastening bolt 3113, the fastening bolt 3113 is in threaded connection with the support base 311, a plurality of inserting grooves 3118 are formed in the mounting housing 3111, inserting plates 3114 are inserted into the inner portion of each inserting groove 3118, a filter screen 3115 is detachably connected to each inserting plate 3114, a limit flange 3117 is arranged on an inner wall of each inserting groove 3118 close to an upper end, a limit plate 3116 is arranged on the bottom of each inserting plate 3114 and on an outer wall close to the upper end, in this embodiment, air entering from outside can be filtered through the plurality of filter screens 3115, external impurities can be prevented from entering the inside of the outer tower body 31, and the filter screen 3115 can be replaced through extracting the inserting plates 3114.

As shown in fig. 8, 9 and 10, the packing placement box 32 includes a placement tray 322, the composite filter material 301 is placed in the interior of the placement tray 322, an outer wall of the placement tray 322 is fixedly connected with an insertion outer edge 321, an outer wall of the insertion outer edge 321 is fixedly connected with a holding handle 325, two sides of the insertion outer edge 321 penetrate through mounting bolts 324 and are in threaded connection with an external tower body 31, a pointed filter screen 323 is arranged in the interior of the placement tray 322, the composite filter material 301 is located between the pointed filter screen 323 and the bottom of the placement tray 322, a plurality of holes are formed in the bottoms of the pointed filter screen 323 and the placement tray 322, and the center of the pointed filter screen 323 is an upward arched tip.

As shown in fig. 8, 9 and 10, two sides of the bottom of the placement tray 322 are fixedly connected with a supporting inclined plate 326, the upper ends of the two side supporting inclined plates 326 are converged and connected to the center of the placement tray 322, two sides of the upper end face of the tip of the two side supporting inclined plate 326 are fixedly connected with a supporting vertical plate 328, the upper ends of the two side supporting vertical plates 328 are fixedly connected with a hollow threaded pipe 327, the center of the tip filter screen 323 is fixedly connected with an internal threaded pipe 329, the internal threaded pipe 329 is in threaded connection with the hollow threaded pipe 327, in this embodiment, when the composite filter material 301 is placed, the composite filter material 301 is placed in the placement tray 322 without installing the tip filter screen 323, then the tip filter screen 323 is installed through the threaded connection of the internal threaded pipe 329 and the hollow threaded pipe 327, and then the composite filter material 301 is added into the center of the hollow threaded pipe 327, so that the tip-up cone of the composite filter material 301 can be formed.

In addition, in order to facilitate the explanation of the treatment effect of the green low-carbon high-density double-circulation aquaculture water treatment system on aquaculture wastewater in this embodiment, the present embodiment uses the water treatment system of the prior art as a control to treat aquaculture wastewater, so as to explain the treatment effect of the green low-carbon high-density double-circulation aquaculture water treatment system in this embodiment. The pollutant concentrations of the culture wastewater are shown in Table 1.

TABLE 1 pollutant concentration of aquaculture wastewater

The treatment results of the water treatment system in the prior art and the green low-carbon high-density double-circulation aquaculture water treatment system in the embodiment are shown in table 2 after the aquaculture wastewater is treated.

TABLE 2 results of the prior art treatment System and the Water treatment System of the present embodiment for treating aquaculture wastewater

As shown in Table 2, after the water treatment system in the prior art is used for treating the aquaculture wastewater, the suspended matter concentration is less than or equal to 45mg/L, the suspended matter removal rate can reach more than 70%, the COD _Mn concentration is less than or equal to 15mg/L, the COD _Mn removal rate reaches more than 65%, the total nitrogen is less than or equal to 3mg/L, the total nitrogen removal rate reaches more than 65%, the suspended matter concentration in the wastewater is less than or equal to 10mg/L, the suspended matter removal rate can reach more than 95%, the COD _Mn concentration is less than or equal to 10mg/L, the COD _Mn removal rate reaches more than 80%, the total nitrogen is less than or equal to 1.5mg/L, and the total nitrogen removal rate reaches more than 85% after the aquaculture wastewater is treated by the green low-carbon high-density double-circulation aquaculture water treatment system in the embodiment. Therefore, the removal rate of pollutants in the green low-carbon high-density double-circulation aquaculture water treatment system is generally higher than that of the water treatment system in the prior art when the aquaculture wastewater is treated, the recycling of the aquaculture wastewater after the aquaculture wastewater is treated by the green low-carbon high-density double-circulation aquaculture water treatment system in the embodiment is ensured, and the utilization rate of water resources is improved.

The foregoing is a further elaboration of the present invention in connection with the detailed description, and it is not intended that the invention be limited to the specific embodiments shown, but rather that a number of simple deductions or substitutions be made by one of ordinary skill in the art without departing from the spirit of the invention, should be considered as falling within the scope of the invention as defined in the appended claims.

Claims

1. A green low-carbon high-density double-circulation aquaculture water treatment system is characterized by comprising an aquaculture pond (10), aquaculture water in the aquaculture pond (10) enters the interior of a planktonic organic filter pond (1), suspended matters and organic matters are primarily removed through the planktonic organic filter pond (1), water after the planktonic organic filter pond (1) enters a micro-filter (2) for further removal of suspended matters and organic matters, water after the micro-filter (2) enters a trickling filter tower (3), the water freely falls into a filter material layer in the tower from the top of the tower, water after the water enters a primary sedimentation tank (4) for preliminary sedimentation, the precipitated water enters a biological sedimentation tank (5), the biological bacterial flora in the biological sedimentation tank (5) absorbs and degrades pollutants in the water and then enters a biological sedimentation tank (6) for secondary sedimentation, the suspended matters in the water are enabled to be precipitated, the water after the precipitation enters a micro-ozone pure oxygen aeration tank (7) for further removal of suspended matters and organic matters, the water after the precipitation enters an aeration biological sedimentation tank (8) for further oxygenation, the residual pollutants in the water is subjected to the water after the micro-ozone aeration tank (7) and the water is subjected to deep degradation by a water body (31) and the water after the water is subjected to be subjected to the degradation by a reverse sedimentation tank (31), the water after the water enters a strong filter box (31) for the ultraviolet sterilization (31) and the water is connected with an external filter box (31) for being placed outside and a fixed, the ultraviolet filter box (31) is connected with the external filter box (31), the composite filter material (301) is placed in each packing placement box (32), a top water tank (33) is installed at the top of an outer tower body (31), a water inlet pipe (331) is detachably connected to the outer wall of the top water tank (33), the packing placement boxes (32) comprise placement trays (322), the composite filter material (301) is placed in the placement trays (322), the outer walls of the placement trays (322) are fixedly connected with plug-in outer edges (321), the outer walls of the plug-in outer edges (321) are fixedly connected with holding handles (325), two sides of the plug-in outer edges (321) penetrate through mounting bolts (324) to be in threaded connection with the outer tower body (31), a tip filter screen (323) is arranged in the placement trays (322), the composite filter material (301) is located between the tip filter screen (323) and the bottoms of the placement trays (322), a plurality of holes are formed in the bottoms of the tip filter screen (323) and the placement trays (322), and the centers of the tip filter screen (323) are upwards arched.

The bottom both sides fixedly connected with who places tray (322) support swash plate (326), the upper end that both sides supported swash plate (326) is to the center convergence and the connection of placing tray (322), the up end both sides fixedly connected with that both sides supported the pointed end of swash plate (326) support riser (328), the upper end fixedly connected with hollow screwed pipe (327) of riser (328) are supported to both sides, the center department fixedly connected with internal thread pipe (329) of tip filter screen (323), internal thread pipe (329) and hollow screwed pipe (327) threaded connection.

2. The system according to claim 1, wherein the top of the outer tower body (31) is detachably connected with a sealing top cover (312), a through hole (314) is formed in the sealing top cover (312), a water outlet pipe (332) is detachably connected to the bottom of the top water tank (33), the water outlet pipe (332) penetrates through the through hole (314), and a water distribution disc (333) is detachably connected to the tail end of the water outlet pipe (332).

3. The system according to claim 2, wherein the top of the sealing top cover (312) is provided with an air vent (313), the upper end of the supporting base (311) is provided with a diversion inclined plane (319), the outer wall of the outer tower body (31) is connected with a discharge pipe (3110), the supporting base (311) is internally provided with a blower (315), the air outlet end of the blower (315) is detachably connected with an air outlet pipe (317), the air outlet pipe (317) penetrates through the inner bottom of the outer tower body (31), the air inlet end of the blower (315) is detachably connected with an air inlet pipe (316), and the air inlet pipe (316) penetrates out of the outer wall of the supporting base (311).

4. The system according to claim 3, wherein a mounting housing (3111) is mounted on the support base (311) in an embedded manner, the mounting housing (3111) partitions the air inlet pipe (316), a protruding plate (3112) is fixedly connected to one upper end of the support base (311), the outer wall of the protruding plate (3112) penetrates through a fastening bolt (3113), the fastening bolt (3113) is in threaded connection with the support base (311), a plurality of inserting grooves (3118) are formed in the mounting housing (3111), inserting plates (3114) are inserted into the inserting grooves (3118), a filter screen (3115) is detachably connected to each inserting plate (3114), a limit flange (3117) is arranged on the inner wall, close to the upper end, of each inserting plate (3114), and a limit plate (3116) is arranged on the bottom of each inserting plate (3118) and the outer wall, close to the upper end.

5. The green low-carbon high-density double-circulation aquaculture water treatment system according to claim 4, wherein the sediments at the bottoms of the primary sedimentation tank (4) and the biological sedimentation tank (6) enter a sludge collection tank (11) to generate organic fertilizer.

6. The system of claim 5, wherein the floating organic filter tank (1) comprises a filter medium (101), a tank body, a supporting material and mounting accessories, the water body is filtered by the filter medium (101), organic matters in the water flow are decomposed by microbial communities on the filter medium as nutrient sources, and a layer of biological film is gradually formed on the surface of the filter medium.

7. The system according to claim 6, wherein the primary sedimentation tank (4) comprises a first inclined tube (401) and a mud bucket, the water flow speed gradually decreases in the tank, suspended matters begin to settle under the action of gravity, heavier particles quickly sink to the bottom of the tank to form a sludge layer, lighter particles settle after being suspended in water for a period of time, and clean water flows out from the upper part into the biodegradation tank (5).