CN116081899A - Seawater culture tail water treatment device and method - Google Patents

Abstract

The invention provides a mariculture tail water treatment device and a mariculture tail water treatment method, wherein the mariculture tail water treatment device comprises a mariculture pond and a purification box body, a first baffle plate, a second baffle plate and a third baffle plate are sequentially arranged in the purification box body along the flowing direction of waste liquid, the first baffle plate, the second baffle plate and the third baffle plate divide the interior of the purification box body into a sedimentation area, a filtering area, an aerobic area and an anaerobic area, the sedimentation area is connected with the outlet end of the mariculture pond, and the outlet end of the anaerobic area is connected with the mariculture pond through a water return pipeline so as to circulate the purified waste liquid to the mariculture pond. The invention integrates various processes such as precipitation, filtration, aerobic purification, anaerobic purification and the like, realizes the purification of the waste liquid discharged from the mariculture pond, and has simple equipment, good purification effect and strong stability.

Description

A kind of marine aquaculture tail water treatment device and method

technical field

The invention belongs to the technical field of seawater aquaculture, and relates to tail water treatment, in particular to a seawater aquaculture tail water treatment device and method.

Background technique

Mariculture is a production activity of using coastal shallow beaches to breed marine aquatic economic animals and plants. It concentrates on cultivating fish, shrimp, shellfish and echinoderms (such as sea cucumbers), etc. The production cycle is short and the output per unit area is relatively high. Classification (1) According to the breeding objects, it can be divided into: fish, shrimp, crab, shellfish, algae, sea delicacies, etc.; (2) According to the degree of intensification, it can be divided into: extensive culture, semi-intensive culture, intensive culture; (3) According to the production method, it can be divided into: monoculture, polyculture (such as fish and shrimp) and interculture (kelp and mussels).

However, the marine aquaculture industry has caused serious pollution of coastal waters, such as eutrophication of water bodies, changes in sedimentary environments, and pollution from antibiotic use, etc., resulting in a decrease in dissolved oxygen DO content in regional water bodies, a large number of aquaculture organisms died, a large number of anaerobic bacteria reproduced, and the marine ecological environment was destroyed. , causing significant economic losses to the aquaculture industry, it is necessary to purify the aquaculture wastewater in time to make it meet the discharge requirements.

There are still some defects in the existing marine aquaculture wastewater treatment equipment, such as the floating matter and impurities in the wastewater can easily block the filter equipment and affect the subsequent treatment process. The removal of total phosphorus is incomplete, resulting in eutrophication of the water body, which cannot be reused.

Contents of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a marine aquaculture tail water treatment device and method, which integrates various processes such as sedimentation, filtration, aerobic purification and anaerobic purification, and realizes the discharge of marine aquaculture ponds. The purification of waste liquid has simple equipment, good purification effect and strong stability.

For reaching this purpose, the present invention adopts following technical scheme:

In the first aspect, the present invention provides a mariculture tail water treatment device, which includes a mariculture tank, and the treatment device also includes a purification box, and the purification box is sequentially provided with a first partition, The second partition and the third partition, the first partition, the second partition and the third partition divide the inside of the purification box into a sedimentation zone, a filtration zone, an aerobic zone and an anaerobic zone, The sedimentation zone is connected to the outlet end of the sea culture pond, and the outlet end of the anaerobic zone is connected to the sea culture pond through a return pipe to circulate the purified waste liquid to the sea culture pond.

A marine aquaculture tail water treatment device provided by the present invention uses a purification box to treat waste liquid produced in a marine aquaculture pond, and has a strong processing capacity, and the sedimentation area conducts preliminary precipitation of the waste liquid, so as to settle large particle pollutants in the waste liquid to Purify the bottom of the box, and the waste liquid flows smoothly into the filter area; the filter area can filter out the particles, suspended solids and aggregates in the waste liquid, and then send the filtered waste liquid into the aerobic area and anaerobic area in sequence, Utilize the physical interception of bacterial colonies, as well as biochemical effects such as adsorption, absorption, and oxidation, to intercept suspended solids in waste liquid, decompose and remove organic matter, ammonia nitrogen, total nitrogen and other pollutants, improve the purification effect of wastewater, and meet the requirements of reuse.

As a preferred technical solution of the present invention, a first liquid outlet is left between the first partition and the top of the inner cavity of the purification box, and a gap is left between the second partition and the bottom of the inner cavity of the purification box. A second liquid outlet, a third liquid outlet is left on the top of the inner cavity of the third partition and the purification box.

The waste liquid in the precipitation zone flows into the filter zone through the first liquid outlet for filtration, and the filtered waste liquid flows into the aerobic zone through the second liquid outlet for aerobic purification treatment, The waste liquid after the aerobic purification treatment flows into the anaerobic zone through the third liquid outlet for anaerobic purification treatment.

As a preferred technical solution of the present invention, several baffles are arranged obliquely upward in the settling area, and the baffles are alternately arranged on the inner cavity wall of the purification box and the first partition.

The invention prolongs the flow time of the waste liquid in the sedimentation area by setting the baffle plate to form a curved flow line, which is beneficial to improve the sedimentation effect.

Preferably, an incubator is also provided outside the purification box, and the incubator is connected to the sedimentation area and the aerobic area through a sewage pipe and a feeding pipe respectively, and the incubator is used to clean the sediment discharged from the sedimentation area. Domesticate the activated sludge bacteria micelles and send them into the aerobic zone.

Preferably, a water inlet is provided at the bottom of the settling area, and the water inlet is used to connect to a seawater culture pond.

In the present invention, an incubator is set, and the sediment discharged from the sedimentation area is used as a raw material, and auxiliary materials (including but not limited to nutrients, accelerators or trace elements) are added to the incubator to cultivate and domesticate the activated sludge fungus group, and sent into the aerobic zone, which is conducive to the decomposition of organic matter and improve the purification effect.

As a preferred technical solution of the present invention, a filter screen assembly is arranged in the filter area, and the filter screen assembly is suspended in the purification box through a lifting mechanism.

Preferably, the lifting mechanism includes a driving part, a telescopic rod, a connecting rod and a lifting rope, the driving part is fixed on the top of the inner cavity of the purification box, and the two ends of the telescopic rod are respectively connected to the driving part With the connecting rod, the driving part is used to drive the telescopic rod to expand and contract, and the connecting rod is connected to the filter screen assembly through the lifting rope.

Preferably, a telescopic spring is sheathed on the outer periphery of the telescopic rod, one end of the telescopic spring is fixed on the top surface of the inner cavity of the purification box, and the other end is connected to the connecting rod.

Preferably, both ends of the filter assembly are slidably connected to the first partition and the second partition respectively.

It should be noted that the present invention does not specifically limit the above-mentioned sliding connection method, and any method known to those skilled in the art can be adopted. The chute is equipped with rollers at both ends of the filter assembly, so that the rollers slide in the chute, or a slide rail can be independently provided on the side surface of the first partition and the second partition that are close to each other. Both ends of the slide block are provided so that the slide block slides on the slide rail.

The lifting mechanism of the present invention is used for replacing the filter screen assembly, and can provide vibration for the filter screen assembly to avoid mesh blockage. During use, the driving part drives the telescopic rod to expand and contract, and the telescopic rod is transmitted to the filter screen assembly through the lifting rope to make it move up and down, and the telescopic spring is set to make it automatically reciprocate and vibrate to avoid clogging the filter screen hole.

Preferably, at least two "V"-shaped slag discharge plates are arranged in the filter area, and the "V"-shaped slag discharge plates are located below the filter screen assembly.

Preferably, the top of the "V"-shaped slag discharge plate is higher than the second liquid outlet.

As a preferred technical solution of the present invention, at least one biological filter disc is arranged in the aerobic zone, and an aerobic bacteria adhesion layer is arranged in the biological filter disc.

Preferably, the bacteria in the aerobic bacteria attachment layer include nitrifying bacteria and/or nitrosifying bacteria.

Preferably, the bottom of the biological filter tray is also provided with a filler matrix, and the filler matrix is filled with activated sludge bacteria micelles.

As a preferred technical solution of the present invention, an aeration mechanism is provided under the biological filter tray, and the aeration mechanism includes an oxygen supply assembly, a guide rod and an aeration cylinder, and the two ends of the guide rod are respectively connected to the The second partition and the third partition, the aerator is rotatably sleeved on the outer periphery of the guide rod, and the oxygen supply component is used to supply oxygen into the aerator.

Preferably, several oxygen supply through holes are opened along the peripheral wall of the aeration cylinder, and the oxygen in the aeration cylinder enters the aerobic zone through the oxygen supply through holes.

Preferably, a support rod is rotatably provided in the aerobic zone, a first bevel gear is provided at one end of the support rod, and the other end is connected to the top of the purification box through a drive motor, and the aerator The outer peripheral sleeve is provided with a second bevel gear, and the first bevel gear and the second bevel gear mesh with each other.

In the present invention, the dissolved oxygen content in the water body in the aerobic zone has a great influence on the bacterial colonies in the aerobic bacteria adhesion layer and the activated sludge bacterial micelle. Aeration should be carried out in a timely manner to ensure the oxygen content in the water body, meet the amount of oxygen required for the normal growth and activities of bacteria colonies, and improve their metabolic capacity. In the present invention, the drive motor drives the support rod to rotate, so that the first bevel gear rotates, and the first bevel gear and the second bevel gear mesh with each other, and then drives the aerator to rotate, so that oxygen is evenly distributed in the water body.

Preferably, the biological filter tray is suspended on the support rod.

As a preferred technical solution of the present invention, at least two biological filter cartridges are arranged side by side from top to bottom in the anaerobic zone, and an anaerobic bacteria adhesion layer is arranged in the biological filter cartridges.

Preferably, both ends of the biological filter cartridge are respectively connected to the second partition and the third partition through foam sleeves.

Preferably, the bacteria in the anaerobic bacteria attachment layer include denitrifying bacteria and/or anammox bacteria.

As a preferred technical solution of the present invention, the return pipes are also respectively connected to the top of the sedimentation zone and the aerobic zone through the first recoil branch pipe, and the return water pipes are also respectively connected to the filter chamber through the second recoil branch pipe. zone and the bottom of the anaerobic zone to backwash the sedimentation zone, filtration zone, aerobic zone and anaerobic zone.

Preferably, a disinfection mechanism is also provided on the return water pipe, and the disinfection mechanism is used to disinfect the effluent from the anaerobic zone.

Preferably, the disinfection mechanism includes an ultraviolet disinfection mechanism and/or an ozone disinfection mechanism.

In a second aspect, the present invention provides a method for treating mariculture tail water. The treatment method uses the mariculture tail water treatment device described in the first aspect to purify the waste liquid discharged from the mariculture pond. The treatment method include:

The waste liquid in the mariculture pond is sent into the purification box, and the preliminary sedimentation, filtration treatment, aerobic purification treatment and anaerobic purification treatment are carried out in sequence, and the purified waste liquid is returned to the mariculture pond.

The present invention provides a treatment method for mariculture tail water, which effectively removes particulate matter, agglomerates, suspended matter, etc. , and decompose and remove organic matter, ammonia nitrogen, total nitrogen and other pollutants to improve the water discharge effect.

As a preferred technical solution of the present invention, the preliminary precipitation includes:

The waste liquid in the mariculture pond is discharged from the bottom of the sedimentation area, and under the action of the baffle plate, the first effluent and slag are obtained, and the first effluent flows from the first liquid outlet on the top of the first partition to the filter area, the slag is discharged through the sewage pipe.

Preferably, the filtering process includes: the first water outlet flows in from the top of the filter area, and fine filtration is performed under the action of the filter screen assembly to obtain the second outlet water, and the second outlet water is obtained from the second outlet water at the bottom of the second partition The mouth flows to the aerobic zone.

Preferably, the aerobic purification treatment includes: the second effluent flows in from the bottom of the aerobic zone, and passes through the aerobic bacteria adhesion layer set in the biological filter tray to remove pollutants to obtain the third effluent, the third effluent Flow to the anaerobic zone from the third liquid outlet on the top of the third partition;

Preferably, the anaerobic purification treatment includes: the third effluent flows in from the top of the anaerobic zone, passes through at least two biological filter cartridges in sequence to remove pollutants to complete the purification, and returns to the mariculture pond through the return pipe.

Preferably, the treatment method further includes: sending the slag in the settling area into the incubator from the sewage pipeline to domesticate the activated sludge bacteria micelles, and sending the obtained activated sludge bacteria micelles into the aerobic Aerobic purification treatment is carried out in the area.

Compared with prior art, the beneficial effect of the present invention is:

The device and method for treating mariculture tail water provided by the present invention use a purification box to treat waste liquid produced in a mariculture pond, and have a strong processing capacity, and the sedimentation zone conducts preliminary precipitation of the waste liquid to remove large particle pollutants in the waste liquid Settling to the bottom of the purification box, the waste liquid flows smoothly into the filter area; the filter assembly filters out the particles, suspended solids and aggregates in the waste liquid, and then sends the filtered waste liquid into the aerobic area and anaerobic area in sequence Internally, the use of physical interception of bacterial colonies, as well as biochemical effects such as adsorption, absorption, and oxidation, intercepts suspended solids in waste liquid, decomposes and removes pollutants such as organic matter, ammonia nitrogen, and total nitrogen, improves the purification effect of wastewater, and meets the requirements for reuse.

Description of drawings

Fig. 1 is a schematic structural view of a marine aquaculture tail water treatment device provided by a specific embodiment of the present invention;

Fig. 2 is a structural schematic diagram of a filter area provided by a specific embodiment of the present invention;

Fig. 3 is a schematic structural diagram of an aerobic zone provided by a specific embodiment of the present invention.

Among them, 1-marine culture pond; 2-purification box; 3-first partition; 4-second partition; 5-third partition; 6-sedimentation area; 7-filtration area; 8-aerobic area ; 9-anaerobic zone; 10-baffle plate; 11-sewage pipe; 12-incubator; 13-feeding pipe; 14-filter assembly; 15-lifting mechanism; - telescopic rod; 154-lifting rope; 155- telescopic spring; 16- "V" type slag discharge plate; 17- aerator; 18- guide rod; 19- support rod; 20- biological filter tray; 21- Filling matrix; 22-first bevel gear; 23-second bevel gear; 24-biological filter cartridge; 25-foam sleeve; 26-return water pipe; 27-first recoil branch pipe; 28-second recoil branch pipe ; 29-disinfection mechanism; 30-first liquid outlet; 31-second liquid outlet; 32-third liquid outlet.

Detailed ways

It should be understood that in the description of the present invention, the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

It should be noted that, in the description of the present invention, unless otherwise clearly stipulated and limited, the terms "set", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.

It should be understood by those skilled in the art that the present invention must include the necessary pipelines, conventional valves and general-purpose pump equipment for realizing the integrity of the process, but the above content does not belong to the main invention points of the present invention, and those skilled in the art can The layout can be added by itself according to the selection of the equipment structure, and the present invention does not make special requirements and specific limitations on this.

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

In a specific embodiment, the present invention provides a mariculture tail water treatment device, comprising a mariculture pond 1 and a purification box 2, as shown in Figure 1, the purification box 2 is sequentially A first partition 3, a second partition 4 and a third partition 5 are provided, and the first partition 3, the second partition 4 and the third partition 5 divide the inside of the purification box 2 into Settling zone 6, filter zone 7, aerobic zone 8 and anaerobic zone 9, described settling zone 6 connects the outlet end of described mariculture pond 1, and the outlet end of described anaerobic zone 9 connects all The seawater culture pond 1 is described to circulate the purified waste liquid to the seawater culture pond 1.

In some embodiments, a first liquid outlet 30 is left on the top of the inner cavity of the first partition 3 and the purification box 2 , and the second partition 4 and the inner cavity of the purification box 2 A second liquid outlet 32 is left at the bottom, and a third liquid outlet 33 is left at the top of the inner cavity of the third partition 5 and the purification box 2 . The waste liquid in the precipitation zone 6 flows into the filter zone 7 through the first liquid outlet 30 for filtration, and the filtered waste liquid flows into the aerobic zone 8 through the second liquid outlet 32 for further filtration. For aerobic purification treatment, the waste liquid after aerobic purification treatment flows into the anaerobic zone 9 through the third liquid outlet 33 for anaerobic purification treatment. A water inlet is provided at the bottom of the settling area 6 , and the water inlet is used to connect to the mariculture pond 1 . In the present invention, the waste liquid flows in from the bottom of the sedimentation area 6, and the particles, suspended matter and aggregates in the waste liquid naturally settle to the bottom of the sedimentation area 6, and the settled waste liquid flows into the filtration area 7 from the top of the filtration area 7. Filtration, the filtered wastewater flows into the aerobic zone 8 from the bottom of the aerobic zone 8 for aerobic purification treatment, and then flows into the anaerobic zone 9 from the top of the anaerobic zone 9 .

In some embodiments, several baffles 10 are arranged obliquely upward in the settling area 6, and the baffles 10 are alternately arranged on the inner cavity wall of the purification box 2 and the first partition 3 . The present invention prolongs the residence time of the waste liquid in the sedimentation area 6 by setting the baffle plate 10 to form a curved flow line, which is beneficial to improve the sedimentation effect.

In some embodiments, an incubator 12 is also provided outside the purification box 2, and the incubator 12 is connected to the sedimentation zone 6 and the aerobic zone 8 through the sewage pipeline 11 and the feeding pipeline 13 respectively. The box 12 is used to acclimate the activated sludge fungus micelles to the sediment discharged from the sedimentation zone 6 and send it into the aerobic zone 8 . In the present invention, by setting a feeding port on the incubator 12, using the sediment discharged from the precipitation area 6 as raw material, and adding auxiliary materials (including but not limited to nutrients, accelerators or trace elements) to the incubator 12, to cultivate and domesticate the activated sludge bacteria micelles, and send them into the aerobic zone 8, which is beneficial to decompose organic matter and improve the purification effect.

In some embodiments, as shown in FIG. 2 , a filter assembly 14 is arranged in the filter area 7 , and the filter assembly 14 is suspended in the purification box 2 through a lifting mechanism 15 . The lifting mechanism 15 includes a driving member 151, a telescopic rod 153, a connecting rod 152 and a lifting rope 154. The driving member 151 is fixed on the inner cavity top of the purification box 2, and the two ends of the telescopic rod 153 are respectively The driving member 151 is connected to the connecting rod 152 , the driving member 151 is used to drive the telescopic rod 153 to expand and contract, and the connecting rod 152 is connected to the filter assembly 14 through the lifting rope 154 . The outer periphery of the telescopic rod 153 is also sleeved with a telescopic spring 155 , one end of the telescopic spring 155 is fixed on the top surface of the inner cavity of the purification box 2 , and the other end is connected to the connecting rod 152 . The two ends of the filter assembly 14 are respectively slidably connected to the first partition 3 and the second partition 4, and a chute can be independently opened on the side surface of the first partition 3 and the second partition 4 close to each other. Rollers are arranged at both ends of the filter assembly 14, so that the rollers slide in the chute, or slide rails can be independently set on the side surfaces of the first partition 3 and the second partition 4 that are close to each other. Both ends of the net assembly 14 are provided with sliders, so that the sliders slide on the slide rails. The lifting mechanism 15 of the present invention is used for replacing the filter screen assembly 14, and can provide vibration for the filter screen assembly 14 to avoid mesh blockage. During use, the driver 151 drives the telescopic rod 153 to expand and contract, and the telescopic rod 153 is transmitted to the filter assembly 14 through the lifting rope 154, so that it moves up and down along the axial direction of the first partition 3 and the second partition 4 Move, and by arranging telescopic spring 155, make it reciprocating vibration automatically, avoid blocking filter screen mesh.

In some embodiments, at least two “V”-shaped slag discharge plates 16 are arranged in the filter area 7 , and the “V”-shaped slag discharge plates 16 are located below the filter screen assembly 14 . The top of the “V”-shaped slag discharge plate 16 is higher than the second liquid outlet 32 . In the filtered waste liquid, there will still be slag or agglomerates that have not been completely filtered out. Under the blocking effect of the "V"-shaped slag discharge plate 16, the filter residue is prevented from entering the subsequent treatment area from the second liquid outlet 32. , affecting the processing effect.

In some embodiments, as shown in FIG. 3 , at least one biological filter disc 20 is disposed in the aerobic zone 8 , and an aerobic bacteria adhesion layer is disposed in the biological filter disc 20 . The bacteria in the aerobic bacteria attachment layer include nitrifying bacteria and/or nitrosifying bacteria. The invention utilizes the aerobic bacteria colony to decompose, absorb, oxidize and other biochemical actions on pollutants such as organic matter, nitrate and total nitrogen in the waste liquid, thereby reducing the concentration of the pollutants and obtaining a good degradation effect.

In some embodiments, the bottom of the biological filter tray 20 is further provided with a filler matrix 21, and the filler matrix 21 is filled with activated sludge bacteria micelles. The activated sludge bacteria micelles filled in the filler matrix 21 are domesticated by using the slag after the mud-water separation in the sedimentation zone 6, and use its bio-aggregation, adsorption and oxidation to decompose and remove organic pollutants in the sewage and improve the efficiency of wastewater treatment. Purification effect and economic benefits.

In some embodiments, an aeration mechanism is provided below the biological filter tray 20, and the aeration mechanism includes an oxygen supply assembly, a guide rod 18 and an aeration cylinder 17, and the two ends of the guide rod 18 are respectively connected The second baffle 4 and the third baffle 5 , the aerator 17 is rotatably sleeved on the outer periphery of the guide rod 18 , and the oxygen supply assembly is used to supply oxygen into the aerator 17 . A number of oxygen supply through holes are opened along the peripheral wall of the aeration cylinder 17 , and the oxygen in the aeration cylinder 17 enters the aerobic zone 8 through the oxygen supply through holes. A support rod 19 is also rotated in the aerobic zone 8 , and the biological filter disc 20 is suspended on the support rod 19 . One end of the support rod 19 is provided with a first bevel gear 22, and the other end is connected to the top of the purification box 2 through a drive motor, and the outer circumference of the aerator 17 is provided with a second bevel gear 23. The first bevel gear 22 and the second bevel gear 23 mesh with each other.

In the present invention, the dissolved oxygen content in the water body in the aerobic zone 8 has a great influence on the bacterial colony in the aerobic bacteria adhesion layer and the activated sludge bacterial micelle. Aeration is carried out continuously to ensure the oxygen content in the water body, meet the oxygen required for the normal growth and activities of the colony, and improve its metabolic capacity. In the present invention, the drive motor drives the support rod 19 to rotate, so that the first bevel gear 22 rotates, and the first bevel gear 22 and the second bevel gear 23 mesh with each other, and then drive the aerator 17 to rotate, so that oxygen is evenly distributed in the water body. In addition, the biological filter tray 20 can rotate with the rotation of the support rod 19, and the rotation speed of the biological filter tray 20 can be adjusted according to the actual situation to avoid the accumulation of residues in the waste liquid, or the agglomeration of bacterial colonies to cause blockage and reduce the biodegradability.

In some embodiments, at least two biological filter cartridges 24 are arranged side by side from top to bottom in the anaerobic zone 9 , and an anaerobic bacteria adhesion layer is arranged in the biological filter cartridges 24 . Two ends of the biological filter cartridge 24 are respectively connected to the second partition 4 and the third partition 5 through foam sleeves 25 . The bacteria in the anaerobic bacteria attachment layer include denitrifying bacteria and/or anammox bacteria. The invention removes organic matter, ammonia nitrogen, total nitrogen and other pollutants in the waste liquid through the physical interception of the anaerobic bacteria attachment layer, biochemical effects such as adsorption, oxidation and synthesis, and meets the requirement of recycling. Prevent the foam sleeve 25 at both ends of the biological filter soup, and float under the buoyancy of the water, not only can effectively contact the pollutants in the water body, but also prevent the biological filter cartridge 24 from falling off.

In some embodiments, the return water pipeline 26 also communicates with the top of the sedimentation zone 6 and the aerobic zone 8 through the first recoil branch pipe 27, and the return water pipeline 26 also passes through the second recoil branch pipe 28 respectively. The bottoms of the filter zone 7 and the anaerobic zone 9 are connected to backwash the sedimentation zone 6 , filter zone 7 , aerobic zone 8 and anaerobic zone 9 . The present invention backwashes the sedimentation zone 6, the filtration zone 7, the aerobic zone 8 and the anaerobic zone 9 respectively through the first recoil branch pipe 27 and the second recoil branch pipe 28, and stirs the bottom of the sedimentation zone 6 and the filter assembly 14. The slag discharge plate, the biological filter tray 20, and the suspended solids, microorganisms or aggregates intercepted on the raw filter cartridges are made to fall off and then mixed in the water body for purification treatment.

In some embodiments, the return water pipe 26 is further provided with a disinfection mechanism 29, and the disinfection mechanism 29 is used for disinfecting the effluent from the anaerobic zone 9. The disinfection mechanism 29 includes an ultraviolet disinfection mechanism 29 and/or an ozone disinfection mechanism 29 . The present invention uses the disinfection mechanism 29 to sterilize the effluent, so as to avoid adverse effects on the breeding of seedlings in the mariculture pond 1 .

In another specific embodiment, the present invention provides a method for treating mariculture tail water, which uses the mariculture tail water treatment device described in a specific embodiment to purify the waste liquid discharged from the mariculture pond 1 processing, the processing methods include:

The waste liquid in the mariculture pond 1 is sent into the purification box 2, and the preliminary sedimentation, filtration treatment, aerobic purification treatment and anaerobic purification treatment are carried out in sequence, and the purified waste liquid is returned to the mariculture pond 1.

The method for treating tail water of mariculture provided by the present invention effectively removes particulate matter, agglomerates and suspended solids in the waste liquid by successively performing sedimentation, filtration, aerobic purification treatment and anaerobic purification treatment on the wastewater in the mariculture pond 1 etc., and decompose and remove organic matter, ammonia nitrogen, total nitrogen and other pollutants to improve the water discharge effect.

In some embodiments, the processing method specifically includes the following steps:

(1) The waste liquid in the mariculture pond 1 is discharged from the bottom of the sedimentation area 6, and under the action of the baffle plate 10, the suspended solids in the waste liquid are settled and separated from the waste liquid to obtain the first effluent and slag , the first water outlet flows from the first liquid outlet 30 at the top of the first partition 3 to the filter area 7, and the slag is discharged into the incubator 12 through the sewage pipe 11;

(2) The first outlet water flows in from the top of the filter area 7, and is finely filtered under the action of the filter screen assembly 14 to obtain the second outlet water, and the second outlet water is not completely removed by the "V" type slag discharge plate 16 The filtered slag or agglomerates flow into the aerobic zone 8 through the second liquid outlet 32 at the bottom of the second dividing plate 4;

(3) After filtering for a period of time, open the driver 151 to drive the telescopic rod 153 to expand and contract, and the telescopic rod 153 is transmitted to the filter assembly 14 through the lifting rope 154, so that it moves along the first partition 3 and the second partition. The axis of 4 moves up and down, and through the telescopic spring 155, it automatically reciprocates and vibrates to avoid blocking the mesh of the filter screen;

(4) The second outlet water flows in from the bottom of the aerobic zone 8, and the drive motor drives the support rod 19 to rotate, so that the first bevel gear 22 rotates, and the first bevel gear 22 and the second bevel gear 23 mesh with each other, and then drive the aeration The air cylinder 17 rotates so that oxygen is evenly distributed in the water body for aeration, and the second outlet water passes through the aerobic bacteria adhesion layer set in the biological filter tray 20 and the activated sludge bacteria micelles in the filler matrix 21 to remove organic pollution The third effluent is obtained, and the third effluent flows into the anaerobic zone 9 from the third liquid outlet 33 at the top of the third dividing plate 5;

(5) The third effluent flows in from the top of the anaerobic zone 9, passes through at least two biological filter cartridges 24 in turn, completes the purification to remove pollutants, and returns to the mariculture pond 1 through the return pipe 26;

(6) Use the slag that is sent into the incubator 12 as raw material, and put in auxiliary agents such as nutrients, accelerators and trace elements in the incubator 12 to domesticate the activated sludge bacteria micelles, and the obtained active The sludge bacteria micelles are sent to the aerobic zone 8 for aerobic purification treatment;

(7) Backwash the sedimentation zone 6, the filtration zone 7, the aerobic zone 8 and the anaerobic zone 9 through the clean outlet water in the return water pipeline 26 respectively through the first recoil branch pipe 27 and the second recoil branch pipe 28, Agitate the bottom of the sedimentation area 6, the filter assembly 14, the slag discharge plate, the biological filter tray 20, the suspended solids, microorganisms or aggregates intercepted on the raw filter cartridge, make them fall off and mix them in the water body for the next step of purification treatment.

The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and those skilled in the art should understand that any person skilled in the art should be aware of any disclosure in the present invention Within the technical scope, easily conceivable changes or substitutions all fall within the scope of protection and disclosure of the present invention.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention. These simple modifications All belong to the protection scope of the present invention.

Claims (10)

1. The utility model provides a mariculture tail water treatment facilities, includes the mariculture pond, its characterized in that, processing apparatus still includes the purification box, first baffle, second baffle and third baffle have been set gradually along waste liquid flow direction in the purification box, first baffle, second baffle and third baffle will the internal separation of purification box is sedimentation zone, filtration zone, good oxygen district and anaerobism district, the sedimentation zone is connected the exit end in mariculture pond, the exit end in anaerobism district is passed through the return water piping connection the mariculture pond to with the waste liquid circulation after purifying to the mariculture pond.

2. The mariculture tail water treatment device according to claim 1, wherein a first liquid outlet is formed in the top of the inner cavity of the first partition plate and the inner cavity of the purifying box body, a second liquid outlet is formed in the bottom of the inner cavity of the second partition plate and the inner cavity of the purifying box body, and a third liquid outlet is formed in the top of the inner cavity of the third partition plate and the inner cavity of the purifying box body;

the waste liquid in the sedimentation zone flows into the filtering zone from the first liquid outlet for filtering, the filtered waste liquid flows into the aerobic zone from the second liquid outlet for aerobic purification treatment, and the waste liquid after the aerobic purification treatment flows into the anaerobic zone from the third liquid outlet for anaerobic purification treatment.

3. The mariculture tail water treatment device according to claim 1 or 2, wherein a plurality of baffle plates are obliquely arranged upwards in the sedimentation zone, and the baffle plates are alternately arranged on the inner cavity wall of the purifying box body and the first baffle plates at intervals;

preferably, an incubator is further arranged outside the purifying box body, the incubator is connected with the sedimentation zone and the aerobic zone through a sewage discharge pipeline and a feeding pipeline respectively, and the incubator is used for performing the domestication of activated sludge zoogloea on sediment discharged from the sedimentation zone and feeding the sediment into the aerobic zone;

preferably, a water inlet is arranged at the bottom of the sedimentation zone and is used for being connected with a mariculture pond.

4. A mariculture tail water treatment device according to any one of claims 1-3, wherein a filter screen assembly is arranged in the filter area, and the filter screen assembly is suspended in the purification box body through a lifting mechanism;

preferably, the lifting mechanism comprises a driving piece, a telescopic rod, a connecting rod and a lifting rope, wherein the driving piece is fixed at the top of an inner cavity of the purifying box body, two ends of the telescopic rod are respectively connected with the driving piece and the connecting rod, the driving piece is used for driving the telescopic rod to stretch and retract, and the connecting rod is connected with the filter screen assembly through the lifting rope;

preferably, the periphery of the telescopic rod is also sleeved with a telescopic spring, one end of the telescopic spring is fixed on the top surface of the inner cavity of the purifying box body, and the other end of the telescopic spring is connected with the connecting rod;

preferably, two ends of the filter screen assembly are respectively and slidably connected with the first partition board and the second partition board;

preferably, at least two V-shaped slag discharging plates are arranged in the filtering area, and the V-shaped slag discharging plates are positioned below the filter screen assembly;

preferably, the top end of the V-shaped slag discharging plate is higher than the second liquid outlet.

5. The mariculture tail water treatment device according to any one of claims 1-4, wherein at least one biological filter disc is arranged in the aerobic zone, and an aerobic bacteria attachment layer is arranged in the biological filter disc;

preferably, the strain in the aerobic bacteria attachment layer comprises nitrifying bacteria and/or nitrosating bacteria;

preferably, a filler matrix is further arranged at the bottom of the biological filter material tray, and activated sludge zoogloea is filled in the filler matrix.

6. The mariculture tail water treatment device according to claim 5, wherein an aeration mechanism is further arranged below the biological filter material disc, the aeration mechanism comprises an oxygen supply assembly, a guide rod and an aeration cylinder, two ends of the guide rod are respectively connected with the second partition plate and the third partition plate, the aeration cylinder is rotatably sleeved on the periphery of the guide rod, and the oxygen supply assembly is used for supplying oxygen into the aeration cylinder;

preferably, a plurality of oxygen supply through holes are formed along the peripheral wall of the aeration cylinder, and oxygen in the aeration cylinder enters the aerobic zone through the oxygen supply through holes;

preferably, a supporting rod is further rotatably arranged in the aerobic zone, one end of the supporting rod is provided with a first bevel gear, the other end of the supporting rod is rotatably connected with the top of the purifying box body through a driving motor, a second bevel gear is sleeved on the periphery of the aeration cylinder, and the first bevel gear is meshed with the second bevel gear;

preferably, the biological filter disc is suspended on the support rod.

7. The mariculture tail water treatment device according to any one of claims 1-6, wherein at least two biological filter cartridges are sequentially arranged side by side from top to bottom in the anaerobic zone, and an anaerobic bacteria attachment layer is arranged in each biological filter cartridge;

preferably, two ends of the biological filter cylinder are respectively connected with the second partition board and the third partition board through foam sleeves;

preferably, the bacterial species within the anaerobic bacterial attachment layer comprise denitrifying bacteria and/or anammox bacteria.

8. The mariculture tail water treatment device according to any one of claims 1 to 7, wherein the water return pipeline is further communicated with the tops of the sedimentation zone and the aerobic zone through a first backflushing branch pipe respectively, and the water return pipeline is further communicated with the bottoms of the filtration zone and the anaerobic zone through a second backflushing branch pipe respectively, so as to backflush the sedimentation zone, the filtration zone, the aerobic zone and the anaerobic zone;

preferably, the water return pipeline is further provided with a disinfection mechanism, and the disinfection mechanism is used for disinfecting the effluent of the anaerobic zone;

preferably, the disinfecting means comprises an ultraviolet disinfecting means and/or an ozone disinfecting means.

9. A method for treating mariculture tail water, characterized in that the method adopts the mariculture tail water treatment device as claimed in any one of claims 1-8 to purify waste liquid discharged from a mariculture pond, and the method comprises the following steps:

delivering the waste liquid in the mariculture pond into a purifying box body, sequentially performing primary precipitation, filtering treatment, aerobic purification treatment and anaerobic purification treatment, and refluxing the purified waste liquid into the mariculture pond.

10. A method of treating mariculture tail water according to claim 9, wherein the preliminary precipitation comprises:

discharging waste liquid in the mariculture pond from the bottom of the sedimentation area, under the action of a baffle plate, obtaining first effluent and slag, wherein the first effluent flows to the filtering area from a first liquid outlet at the top of a first baffle plate, and the slag is discharged through a sewage discharge pipeline;

preferably, the filtering process includes: the first effluent flows in from the top of the filtering area, fine filtration is carried out under the action of the filter screen assembly to obtain second effluent, and the second effluent flows to the aerobic area from a second liquid outlet at the bottom of the second partition plate;

preferably, the aerobic purification treatment comprises: the second effluent flows in from the bottom of the aerobic zone, passes through an aerobic bacteria attachment layer arranged in the biological filter material disc to remove pollutants to obtain third effluent, and flows to the anaerobic zone from a third liquid outlet at the top of the third partition plate;

preferably, the anaerobic purification treatment comprises: the third effluent flows in from the top of the anaerobic zone, sequentially passes through at least two biological filter cartridges to remove pollutants to finish purification, and flows back into the mariculture pond through a water return pipeline;

preferably, the processing method further comprises: and (3) sending the slag in the precipitation area into an incubator through a sewage pipeline for domestication of activated sludge zoogloea, and sending the obtained activated sludge zoogloea into an aerobic area for aerobic purification treatment.

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