CN206467095U - A kind of marine culture wastewater purification process technique device - Google Patents

Abstract

The utility model relates to a process device for purifying and treating marine aquaculture wastewater, comprising a culture pond, a vortex separator connected to the outlet of the culture pond, a protein separator, and a biological filter. The culture pond, the vortex separator, a microfilter, The protein separator and the biofilter are connected sequentially through pipelines to jointly form a nitrification unit, which is characterized in that: the outlet of the biofilter is also connected to a branch of the denitrification unit. Compared with the prior art, the utility model has the advantages of The denitrification unit is added to the traditional nitrification unit for the purification of seawater aquaculture wastewater, which can timely treat seawater wastewater and solve the problem of ammonia nitrogen and nitrite nitrogen in the water body caused by internal bait and wastewater treatment in the breeding process. For the problem of accumulation, the combined operation of multiple equipment such as vortex separators, microfilters, protein skimmers and water tanks can also eliminate the toxicity of nitric acid accumulation to the species being raised.

Description

A process device for purification and treatment of seawater aquaculture wastewater

technical field

The utility model relates to a waste water purification treatment process device, in particular to a seawater aquaculture waste water purification treatment process device.

Background technique

Industrialized fish farming, shrimp farming, and crab farming refer to a factory-like and intensive farming model that integrates modern industrial technology. Narrow or typical industrialized fish, shrimp and crab farming refers to land-based closed or semi-closed circulating water system for fish, shrimp and crab farming; broad sense of industrial fish, shrimp and crab farming covers Production models such as land-based factories, big pond recirculating aquaculture, marine ranches, and modern deep-water cages have been established. Since this type of aquaculture industry is an intensive aquaculture model established on the basis of modern industry, they all have advanced aquaculture equipment, the aquaculture environment is controllable, the aquaculture density per unit of water is high, and the output is high. The whole aquaculture process can be mechanized or automated. , management, harvest, quality and safety are easy to control, products can be launched in a balanced manner, and the social, economic and ecological benefits are good, so it is internationally recognized as the development direction of the modern mariculture industry. In the next decade or so, the global aquaculture industry will meet the world's population's demand for aquatic products in an environmentally friendly manner. The key technology lies in the recirculating aquaculture system technology. The efficient economic model of the recirculating aquaculture system makes it the highest unit output among all farming models. Compared with traditional aquaculture, recirculating aquaculture can save 50-100 times of land and 160-2600 times of water per unit of aquatic products, saving 90%-99% of water and 99% of land compared with traditional aquaculture, and almost Do not pollute the environment.

As the water treatment unit with the largest investment and energy consumption in the closed recirculating aquaculture system, a series of scientific problems such as the screening of carrier fillers in biofilters, the growth and shedding of biofilms, and the structure and function have not yet been resolved, and traditional filters are still in use. In the design, only the cultivation of nitrifying bacteria is considered. The water flow in the filter is fast and the dissolved oxygen is high. Although it can largely convert the ammonia nitrogen and nitrite nitrogen in the water body into relatively less toxic nitrate nitrogen, but The nitrate nitrogen in the system cannot be eliminated and accumulates for a long time; when the concentration is high, it will also cause harm to the cultured organisms, and at the same time it will inhibit the conversion of ammonia nitrogen and nitrite nitrogen to nitrate nitrogen. Moreover, in the existing aquaculture process, the internal bait and wastewater treatment are not in place, which will easily lead to water pollution, and the incoming water contains a large amount of harmful substances, and there are poisonous species in the cultivation of species with high water quality requirements, affecting their growth. , and even cause death.

Contents of the invention

The technical problem to be solved by the utility model is to provide a process device capable of timely treating the water quality so as to meet the optimal growth requirements of the species for the purification and treatment of marine aquaculture wastewater.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: the seawater aquaculture wastewater purification treatment process device includes a culture pond, a vortex separator connected to the outlet of the aquaculture pond, and the waste water separated from the vortex separator. A microfilter for screening out fine suspended matter, a protein separator for removing protein from the waste water discharged from the microfilter, and a biofilter for microbial treatment of the waste water separated from the protein skimmer, the The culture pond, the vortex separator, the microfilter, the protein separator and the biofilter are sequentially connected through pipelines to form a nitrification unit, and the feature is that: the outlet of the biofilter is also connected to a denitrification unit branch, so The branch of the denitrification unit includes at least one group of culture tanks and a water tank that collects water purified from the group of culture tanks, and each group of culture tanks includes at least one culture tank, and the culture tanks are provided with water inlets and outlets. The water outlet, and a barrier is also provided in the culture tank, and the barrier divides the culture tank into multiple grids in turn, and is provided with an independent reaction chamber that provides carbon source filter materials for denitrifying bacteria. The first grid reaction chamber is connected to the The water inlet is connected, the water inlet is connected with the outlet of the biofilter, the last independent reaction chamber is connected with the water outlet, and the water outlet is also connected with the inlet of the water tank.

Further, the outlet of the water tank is connected with a water heater, the inlet of the water tank is connected with the water tank, and the outlet of the water tank is connected with the inlet of the culture pond. The water heating and cooling machine can supply the water filtered and collected in the water tank to the breeding pool at a constant temperature through microelectronic control, and the temperature setting can be adjusted according to the breeding conditions.

Further, the barrier is formed by at least one vertical partition and at least one horizontal partition, and one vertical partition or one horizontal partition of the frontmost reaction chamber and the last reaction chamber The above-mentioned downflow channel/upflow channel is arranged on the divider, and a vertical partition and a horizontal partition of any independent reaction chamber between the first grid reaction chamber and the last grid reaction chamber The downflow channel/upflow channel are respectively arranged on the top. The barriers formed by at least one vertical partition and at least one horizontal partition are combined to separate the culture tank into multiple independent reaction chambers. When the water inlet of the first reaction chamber is connected to the outlet of the biofilter , the water flow can be deflected up and down along the downflow channel and upflow channel of each independent reaction chamber, so as to change the water flow direction in the traditional filter to a single flow direction, which will cause the filter material to occur with the extension of the filtration working time. For different degrees of blockage, the water flow can be deflected up and down, and each independent reaction chamber of the culture tank can still be filled with water when the water failure occurs, so that the water output during the filtration process of the whole culture water filter device is stable.

Further, the upflow channel and the downflow channel are at least one through hole arranged on the vertical or horizontal partition, and the through hole of the upflow channel is located on the vertical or horizontal partition. Place above the partition, and the through hole of the downflow channel is located below the vertical partition or horizontal partition. Due to the setting of the upflow channel and the downflow channel, the water flow through the entire culture tank is very slow, and the ammonia nitrogen and nitrite nitrogen in the water body can be converted into relatively less toxic nitrate nitrogen to a large extent. And the filter material in each independent reaction chamber also provides carbon source for denitrifying bacteria. Under anoxic conditions, denitrifying bacteria reduce nitrate and release molecular nitrogen or nitrous oxide to eliminate the impact of nitric acid accumulation on the cultured plants. The poison that exists in the species affects its growth.

Further, the filter material is a copolymer of new biopolymer 3-hydroxybutyrate and 3-hydroxyvalerate. The copolymer of 3-hydroxybutyrate and 3-hydroxyvalerate is PHBV filler, which not only has the filtering effect of traditional filter materials on solid particles in water, but also can be used as a carrier of biofilm, and at the same time provide carbon source for microorganisms .

Further, the biological filter includes sea sand, quartz sand filter material, coral sand and biochemical filter cotton arranged in layers from bottom to top, and nitrifying bacteria, Bacillus subtilis and algae are fixed in the internal space and surface of the biochemical filter cotton . Through the physical filter layer composed of sea sand, quartz sand filter material, coral sand and biochemical filter cotton, the wastewater separated from the protein skimmer can be further settled.

Compared with the prior art, the utility model has the advantage that a denitrification unit is added to the traditional nitrification unit for the purification treatment of seawater aquaculture wastewater, which can timely process seawater wastewater and solve the problem of internal bait and wastewater treatment in the breeding process. The problem of accumulation of ammonia nitrogen and nitrite nitrogen in the water body caused by inadequacy is combined with the joint operation of multiple equipment such as vortex separators, microfilters, protein separators and water tanks, and comprehensively controls multiple important parameters such as water temperature and dissolved oxygen. , in addition, each culture tank group in the denitrification unit water is connected to the outlet of the biofilter, and the waste water treated by microorganisms such as nitrifying bacteria is pumped in from the water inlet through the pump and then enters each independent reaction chamber respectively, and the water flow passes through the downflow channel Or the upflow passage enters an independent reaction chamber of a grid, and then enters the next independent reaction chamber 70 through the upflow passage or the downflow passage, so that the circuitously advances until the water flow enters the downflow area of the last grid independent reaction chamber, and finally enters The water inlet of the water tank is discharged. This way of water flow can strengthen the stability of the overall aquaculture water filter device. Due to the setting of the upflow channel and the downflow channel, the water flow through the entire aquaculture tank is very slow, which can greatly reduce the water body. The ammonia nitrogen and nitrite nitrogen in the environment are converted into relatively less toxic nitrate nitrogen, while denitrifying bacteria reduce nitrate under anoxic conditions and release molecular nitrogen or nitrous oxide to eliminate the impact of nitric acid accumulation on all Toxic hazards that exist in cultured species.

Description of drawings

Fig. 1 is the flow chart of wastewater purification treatment process device in the utility model embodiment;

Fig. 2 is the structural schematic diagram of culture tank group in the utility model embodiment;

Fig. 3 is the structural representation of wherein a group of breeding tank group among Fig. 2;

Fig. 4 is a schematic structural view of the first culture tank in a group of culture tanks in Fig. 3 .

detailed description

The utility model is described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 4, the seawater aquaculture wastewater purification treatment process device includes a culture pond 1, a vortex separator 2 connected to the outlet of the aquaculture pond 1, and the waste water separated from the vortex separator 2 is screened out of fine suspended matter. The microfilter 3, the waste water discharged from the microfilter 3 is added to the protein skimmer 4 for protein removal, and the waste water separated from the protein skimmer 4 is carried out to the biofilter 5 for microbial treatment, the culture pond 1, The vortex separator 2, the microfilter 3, the protein separator 4 and the biofilter 5 are sequentially connected through pipelines to form a nitrification unit. Since there are many fish, shrimp, crab feces and bait residues, and the protein content is high, the protein content is high. Separator 4 removes protein, so as not to cause the protein poisoning that cultured fish, shrimp, crab produce, and biofilter 5 comprises sea sand, quartz sand filter material, coral sand and biochemical filter cotton layered from bottom to top in addition, There are nitrifying bacteria, Bacillus subtilis and algae fixed in the internal space and surface of the biochemical filter cotton. The waste water separated from the protein skimmer 4 is further settled through the physical filter layer composed of sea sand, quartz sand filter material, coral sand and biochemical filter cotton. In addition, the outlet of the biofilter 5 is also connected to a denitrification unit branch. The denitrification unit branch includes a group of culture tanks and a water tank 7 that collects water purified from the culture tank group 6. Each group of culture tanks includes three And the cultivation groove stacked up and down, promptly be positioned at the first cultivation groove 61 of uppermost layer, be positioned at the second cultivation groove 62 of middle layer and be positioned at the 3rd cultivation groove 63 of bottom floor, be provided with in each cultivation groove by a plurality of longitudinally put The plate 8 and a plurality of horizontal partitions 9 are combined to form a barrier. The barrier divides each culture tank into multiple grids. An independent reaction chamber 70 is provided with a filter material 40PHBV filler. The first grid of the first culture tank 61 reacts The chamber is communicated with the water inlet 64, and the water inlet 64 is connected with the outlet of the biofilter 5, and the last independent reaction chamber 70 of the third breeding tank 63 is communicated with the water outlet 65, and the water outlet 65 is also communicated with the inlet of the water tank 7 In this embodiment, the barriers of the first, second, and third cultivation tanks include a vertical partition 8 and four horizontal partitions 9, which are assembled and inserted to separate the first, second, and third cultivation tanks into ten Independent reaction chamber 70, wherein each grid independent reaction chamber 70 also includes the downflow passage 20 and the ascending flow passage 30 that can allow water to flow into the next lattice independent reaction chamber 70 from the last lattice independent reaction chamber 70, and the ascending flow passage 30 and the downflow channel 20 are a plurality of through holes arranged in rows on the vertical partition 8 or the horizontal partition 9, and the through holes of the upflow channel 30 are located at the vertical partition 8 or the horizontal partition 9. above, and the through hole of the downflow channel 20 is located below the vertical partition 8 or the horizontal partition 9, so that the water flow can be pumped in from the water inlet channel of the first culture tank 61 by a water pump and then enters each independent reaction chamber 70, the water flow enters an independent reaction chamber 70 through the downflow channel 20 or the upflow channel 30, and then enters the next independent reaction chamber 70 through the upflow channel 30 or the downflow channel 20, so that the water flow enters the third independent reaction chamber. In the downflow area of the last grid independent reaction chamber 70 of the culture tank 63, it is finally discharged by the water outlet 65 and enters the water tank 7 inlet. This way of entering water can strengthen the stability of the overall culture tank filtration.

The filter material 40 filled in each independent reaction chamber 70 is a copolymer of novel biopolymer 3-hydroxybutyrate and 3-hydroxyvalerate, which not only has the filtering effect of the traditional filter material 40 on solid particles in water, PHBV can also be used as a carrier of biofilm, and at the same time provide carbon source for denitrifying bacteria, convert nitrate nitrogen in the water body into nitrogen gas, so as to achieve the effect of complete denitrification, and finally the water filtered out from the culture tank group 6 enters the water tank 7. It can be pumped back into the culture pond 1 again to carry out circulating water cultivation.

Claims (5)

1. a kind of marine culture wastewater purification process technique device, includes culturing pool (1), exports what is be connected with culturing pool (1) Swirl separator (2), the waste water isolated from the swirl separator (2) carried out Microfilter (3) that fine suspension screens out, The waste water of the discharge from the Microfilter (3) be subject to protein removal Protein Skimmer (4) and will be from the albumen Waste water that matter separator (4) is isolated carries out the biofilter (5) of microbiological treatment, the culturing pool (1), swirl separator (2), Microfilter (3), Protein Skimmer (4) and biofilter (5) are connected in turn by pipeline and collectively form de-nitrification unit, It is characterized in that：The outlet of the biofilter (5) is also connected with a denitrification unit branch, the denitrification unit branch bag Include at least one set of breeding trough and collect the water tank (7) that water is purified from the breeding trough group (6), every group of breeding trough Include at least one breeding trough, the breeding trough is provided with water inlet (64) and delivery port (65), and is also set in the breeding trough There are barriers, breeding trough is divided into many lattice and is provided with to the only of denitrifying bacterium offer carbon source filter material (40) by the barriers successively Vertical reative cell (70), most previous reaction grid room is connected with described water inlet (64), the water inlet (64) and the biological filter The outlet in pond (5) is connected, and last lattice independent reaction room (70) is connected with described delivery port (65), and the delivery port (65) Import also with the water tank (7) is connected.

2. marine culture wastewater purification process technique device according to claim 1, it is characterised in that：The water tank (7) Outlet be connected with Arrangement for heating or cooling water in receptacle for live fish (10), the import of the Arrangement for heating or cooling water in receptacle for live fish (10) is connected with the water tank (7), the Arrangement for heating or cooling water in receptacle for live fish (10) outlet and the inlet communication of the culturing pool (1).

3. marine culture wastewater purification process technique device according to claim 1, it is characterised in that described barriers Including being combined and being formed by least one longitudinal dividing plate (8) and at least one horizontal dividing plate (9) interpolation, the most previous reaction grid room Circulation road (20)/upflow channel drops with being provided with a longitudinal dividing plate (8) of last reaction grid room or horizontal dividing plate (9) (30) one, and positioned at any one lattice independent reaction room 70 between most previous reaction grid room and last reaction grid room is longitudinal Described drop circulation road (20)/upflow channel (30) is respectively arranged with dividing plate (8) and a horizontal dividing plate (9).

4. marine culture wastewater purification process technique device according to claim 3, it is characterised in that：The upflow channel And drop circulation road (20) is to be arranged at least one through hole on the longitudinal dividing plate (8) or horizontal dividing plate (9), the liter (30) The through hole of circulation road (30) is located at the top of the longitudinal dividing plate (8) or horizontal dividing plate (9), and the drop circulation road (20) is logical Hole position is in the longitudinal dividing plate (8) or the lower section of horizontal dividing plate (9).

5. the marine culture wastewater purification process technique device according to Claims 1 to 4 any one claim, it is special Levy and be：The biofilter (5) includes being layered the sea sand of setting, quartz sand filter media, coral sand and biochemical filter pulp from the bottom to top, The biochemical filter pulp internal voids and surface are fixed with nitrobacteria, bacillus subtilis and algae.