CN112279378A - Biological treatment method and device for purifying aquaculture wastewater and circulating purification aquaculture device - Google Patents

Biological treatment method and device for purifying aquaculture wastewater and circulating purification aquaculture device Download PDF

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Publication number
CN112279378A
CN112279378A CN202011105924.XA CN202011105924A CN112279378A CN 112279378 A CN112279378 A CN 112279378A CN 202011105924 A CN202011105924 A CN 202011105924A CN 112279378 A CN112279378 A CN 112279378A
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cylinder
wastewater
biological treatment
purifying
biological
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CN112279378B (en
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周澄
吴翼伶
钱昊冬
茅思楠
张星星
徐乐中
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Suzhou University of Science and Technology
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Suzhou University of Science and Technology
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
    • A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Abstract

The invention belongs to the technical field of aquaculture wastewater biological treatment, and particularly relates to a method and a device for purifying aquaculture wastewater biological treatment and a circulating purification aquaculture device. The method comprises biological contact oxidation reaction, membrane biological reaction filtration and sludge sedimentation separation. The device comprises a cylinder body, an inverted cone cylinder arranged in the cylinder body, a cylinder arranged in the center of the inverted cone cylinder and a sludge discharge pipeline connected with the small end of the inverted cone cylinder. According to the technical scheme provided by the invention, phosphorus-rich sludge is removed and reduced by biologically contacting, oxidizing and nitrifying the culture wastewater, reducing carbon, performing membrane biological reaction, filtering, denitrifying, removing carbon and removing residual sludge in a sludge settling and separating zone, so that the aim of efficiently removing nitrogen and carbon is fulfilled, and the impurity removal efficiency in a water body is higher due to the unique inverted cone-shaped cylinder design.

Description

Biological treatment method and device for purifying aquaculture wastewater and circulating purification aquaculture device
Technical Field
The invention belongs to the technical field of aquaculture wastewater biological treatment, and particularly relates to a method and a device for purifying aquaculture wastewater biological treatment and a circulating purification aquaculture device.
Background
In recent years, aquaculture source pollution is one of the important sources of agricultural source pollution, and is concerned and researched by more and more scholars. According to the 'annual survey for Chinese fishery statistics in 2018' issued by fishery agency of Ministry of agriculture in China, the aquaculture area in China in 2017 reaches 7449.03 kilohm2Wherein the pond culture area is 2527.78 kilohm2Accounting for 47.12 percent of the fresh water culture area. According to the 33 th publication of China's No. 33 national pollution sources census in 2020, the discharge amount of water pollutants in the aquaculture industry in 2017: 66.60 million tons of chemical oxygen demand, 2.23 million tons of ammonia nitrogen, 9.91 million tons of total nitrogen and 1.61 million tons of total phosphorus. Becomes a non-negligible important pollution source of natural water. How to efficiently recycle aquaculture wastewater with huge pollution becomes a difficult problem for human beings.
Many treatment methods for aquaculture wastewater have been developed at home and abroad, including physical and chemical treatment methods and biofilm methods, salt-tolerant plant treatment methods, artificial wetland treatment methods, precipitation-shellfish filtration-algae adsorption comprehensive treatment methods, and the like. In addition, there are treatment methods that are specific to the particulate matter in suspension. The Suzhou and other places adopt an ecological plant ditch interception method for aquaculture wastewater to purify the wastewater, reduce the pollution of the water body of the Taihu Yangcheng lake and are worthy of popularization, but the method can be influenced by seasons. The research combines biological contact oxidation and biological filtration to form a biological side-filtration purifier, so as to realize the purification and recycling of aquaculture water.
Disclosure of Invention
The invention provides a biological treatment method and device for purifying aquaculture wastewater and a circulating purification aquaculture device, which are used for solving the problems that the conventional aquaculture wastewater is not fully and reasonably utilized and the wastewater does not reach the discharge standard.
In order to solve the technical problems, the technical scheme of the invention is as follows: the biological treatment method for purifying the aquaculture wastewater comprises the following steps:
1) biological contact oxidation reaction: under the oxygen-enriched environment, nitrifying bacteria in the suspended filler oxidize ammonia in the wastewater into nitrate to carry out nitration reaction, organic carbon is biologically utilized, and part of phosphorus is absorbed in the growth process of microorganisms;
2) membrane biological reaction filtration: under the anoxic environment, the biological membrane absorbs organic matters in the wastewater, and the entered nitrate is subjected to denitrification reaction under the action of denitrifying bacteria in the porous ceramsite filter material to form nitrogen gas for release, so that the nitrogen in the wastewater is degraded, and in addition, the porous ceramsite filter material intercepts and filters the wastewater;
3) sludge settling separation: sludge subjected to biological contact oxidation reaction and membrane biological reaction filtration is compressed and settled, muddy water is discharged from gaps, and nutrients including nitrogen and phosphorus are reduced along with the discharge of the sludge.
The invention also provides a biological treatment device for purifying the aquaculture wastewater, which comprises a cylinder body, an inverted cone arranged in the cylinder body, a cylinder arranged in the center of the inverted cone and a sludge discharge pipeline connected with the small end of the inverted cone, wherein the cylinder body is divided into an inner area of the inverted cone and an outer area of the inverted cone by the inverted cone, the inner area of the inverted cone is divided into an inner area of the cylinder, an area surrounding the cylinder and a lower area below the cylinder by the cylinder, the inner area of the cylinder is a biological contact oxidation reaction area, the area surrounding the cylinder and the outer area of the inverted cone are membrane biological reaction filter areas, the lower area of the cylinder is a sludge settling and separating area, and the sludge discharge pipeline guides the sludge in the sludge settling and separating area out of the cylinder body.
The inverted cone is designed, the water body flows in a turbulent way, so that impurity particles of the water body collide, the water flow speed is reduced from bottom to top around the cylinder area, the water flow speed is reduced from top to bottom in the area outside the inverted cone, namely, the speed is reduced from high to low along the water flow direction, the collision chance is correspondingly increased when the initial speed is high, the upward speed is gradually reduced, and the formed floc is not easy to break. The hydraulic condition from big to small is favorable for flocculating, filtering and removing impurities.
Optionally, the cylinder wall is provided with a plurality of first through holes communicating an inner region of the cylinder with an outer region of the cylinder, and the inverted cone wall is provided with a plurality of second through holes communicating the inner region of the cylinder with the outer region of the inverted cone.
Optionally, the second through hole is horizontally mapped to the cylinder sidewall at a position higher than the first through hole.
Optionally, flexible fillers are arranged on two sides of the second through hole. The flexible filler is distributed around the conical inverted cone-shaped cylinder, so that floc sludge can be trapped, contact flocculation is carried out, and sewage and a biological membrane are in contact oxidation.
Optionally, a suspended filler loaded with nitrobacteria is arranged in the cylinder, and a ceramsite filter loaded with denitrifying bacteria is arranged below the flexible filler in the outer region of the inverted cone.
Optionally, the bottom of the cylinder is provided with a conical cover with an opening at the top, and the top of the conical cover is provided with a bell-jar with a water vapor escape hole.
Optionally, an aeration pipe is arranged in the cylinder, and an aeration head of the aeration pipe performs aeration.
Suspending the filler in the cylinder, and carrying out biological contact oxidation reaction including nitration reaction.
Optionally, a first mud return gap is arranged between the surrounding cylinder area and the area below the cylinder, and a second mud return gap is arranged between the area inside the cylinder and the area below the cylinder.
The invention also provides a circulating purification culture device, which comprises a culture tank, the biological treatment device for purifying the culture wastewater, a communicating pipe for introducing the water of the culture tank into the biological treatment device for purifying the culture wastewater, and a reflux system for guiding the water of the biological treatment device for purifying the culture wastewater back to the culture tank.
Optionally, one end of the communicating pipe is positioned below the water level of the culture tank, and the other end of the communicating pipe is a water inlet of the biological treatment device for purifying the culture wastewater; the backflow system comprises a water pump positioned at the bottom of the outer area of the inverted cone, a backflow pipe connected with the water pump, a nozzle arranged at the water outlet of the backflow pipe and an arc-shaped cover arranged above the nozzle.
The filtered water is returned to the culture tank for reuse through a return pipe by adopting a micro water pump, and the water head of the micro water pump is fully utilized and sprayed through a nozzle to form surface reoxygenation.
Optionally, the nozzle is located above the aquarium water level.
Optionally, the culture tank and the tank body of the biological treatment device for purifying culture wastewater are integrally formed.
According to the technical scheme provided by the invention, phosphorus-rich sludge is removed and reduced by biologically contacting, oxidizing and nitrifying the culture wastewater, reducing carbon, performing membrane biological reaction, filtering, denitrifying, removing carbon and removing residual sludge in a sludge settling and separating zone, so that the aim of efficiently removing nitrogen and carbon is fulfilled, and the impurity removal efficiency in a water body is higher due to the unique inverted cone-shaped cylinder design.
Drawings
FIG. 1 is a schematic structural view of one embodiment of the circulating purification cultivation device of the present invention;
FIG. 2 is a schematic structural diagram of a biological treatment device for purifying aquaculture wastewater according to an embodiment of the present invention.
Shown in the figure:
10-culture tank, 20-purification tank, 21-tank body, 22-inverted cone, 221-second through hole, 222-flexible filler, 223-ceramsite filter material, 224-first mud return seam, 23-cylinder, 231-first through hole, 232-suspended filler, 233-conical cover, 234-bell cover, 235-aeration pipe, 236-aeration head, 237-second mud return seam, 241-mud discharge pipe, 242-mud discharge valve, 30-baffle, 40-communicating pipe, 51-water pump, 52-return pipe, 53-nozzle, 54-arc cover, I-inverted cone outer area, II-cylinder inner area, III-surrounding cylinder area and IV-cylinder lower area.
Detailed Description
For the convenience of understanding, the biological treatment method, the device and the circulating purification cultivation device for purifying cultivation wastewater are described in the following with reference to the following examples, which should be understood as merely illustrative and not limiting the scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixed or detachably or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The biological treatment method for purifying the culture wastewater comprises the following areas and processes:
1) biological contact oxidation reaction zone: under the oxygen-enriched environment, nitrifying bacteria in the suspended filler oxidize ammonia in the wastewater into nitrate to carry out nitration reaction, organic carbon is biologically utilized, and part of phosphorus is absorbed in the growth process of microorganisms;
2) a membrane bioreaction filtering area: under the anoxic environment, the biological membrane absorbs organic matters in the wastewater, and the entered nitrate is subjected to denitrification reaction under the action of denitrifying bacteria in the porous ceramsite filter material to form nitrogen gas for release, so that the nitrogen in the wastewater is degraded, and in addition, the porous ceramsite filter material intercepts and filters the wastewater;
3) sludge settling and separating area: the sludge in the biological contact oxidation reaction zone and the membrane biological reaction filtering zone is compressed and settled in the sludge settling and separating zone, the muddy water is discharged by gaps, and the nutrients including nitrogen and phosphorus are reduced along with the discharge of the sludge.
Based on the thought of the method, an efficient and practical circulating purification breeding device is designed. The culture device can be used for culturing a plurality of aquatic organisms, and in the embodiment, the fish is cultured for example, namely, an ecological fish tank is provided.
Example 1
As shown in fig. 1, the ecological fish tank comprises a left cultivation tank 10 and a right purification tank 20 which are integrally formed, a partition plate 30 is arranged between the cultivation tank 10 and the purification tank 20, a communication pipe 40 for introducing water of the cultivation tank into the purification tank, and a return system for guiding the water of the purification tank back to the cultivation tank. The ecological fish tank is made of organic glass, and the effective volume is 8L.
With continued reference to fig. 1, one end of the communicating pipe 40 is located below the water level of the culture tank 10, and the other end is a water inlet of the purification tank 20; the backflow system comprises a water pump 51 positioned at the bottom of the purification cylinder 20, a backflow pipe 52 connected with the water pump 51, a nozzle 53 arranged at the water outlet of the backflow pipe 52 and an arc-shaped cover 54 arranged above the nozzle 53, wherein the nozzle 53 is positioned above the water level of the culture cylinder 10.
The purification tank 20, i.e., the biological treatment apparatus for purifying aquaculture wastewater, will be described in detail below.
With continuing reference to fig. 1, it includes cylinder 21, the cylinder 22 of the reverse taper in the cylinder 21, the cylinder 23 set up in the centre of the cylinder 22 of the reverse taper, the mud pipe 241 that couples to small port of the cylinder 22 of the reverse taper and the mud valve 242 set up on the mud pipe, the mud pipe 241 discharges the mud in the separation zone of mud sedimentation to the outside of cylinder 21 through the mud valve 242 control clearance.
With continued reference to fig. 1, the cylinder body 21 is divided into an inverted cone inner area and an inverted cone outer area I by the inverted cone 22, the inverted cone inner area is divided into a cylinder inner area II, a surrounding cylinder area III and a cylinder lower area IV by the cylinder 23, the cylinder inner area II is a biological contact oxidation reaction area, the surrounding cylinder area III and the inverted cone outer area I are a membrane biological reaction filtration area, and the cylinder lower area IV is a sludge settling separation area. The inverted cone-shaped cylinder 22 and the cylinder 23 are both made of stainless steel, wherein the effective volume of an area II in the cylinder, namely a biological contact oxidation reaction zone, is 2L, the conical membrane biological reaction filtering zone is made of stainless steel, the effective volume of the membrane biological reaction filtering zone is 5L, and the effective volume of the sludge sedimentation separation zone is 1L.
The most important characteristic is that the reverse conical cylinder is arranged, the water flow speed in the area III is from high to low from low to high, the water flow speed in the area I is from high to low, namely, the speed is from high to low along the water flow direction, the collision chance is correspondingly increased when the initial speed is high, the upward speed is gradually reduced, and the formed floc is not easy to break. The hydraulic condition from big to small is favorable for flocculating, filtering and removing impurities.
With continued reference to fig. 1, the wall of the cylinder 23 is provided with a plurality of first through holes 231 communicating the cylinder inner area II and the surrounding cylinder area III, and the wall of the inverted cone 22 is provided with a plurality of second through holes 221 communicating the surrounding cylinder area III and the inverted cone outer area I. More specifically, the first through hole 231 is opened at one third of the height of the lower part of the cylinder 23, the opening rate is 4% -6%, and the hole diameter is 3-5 mm, and the second through hole 221 is opened at one third of the height of the upper part of the inverted cone 22, the opening rate is 3% -5%, and the hole diameter is 2-3 mm. That is, the position where the second through hole 221 is horizontally mapped to the sidewall of the cylinder 23 is higher than the first through hole 221.
As shown in figure 2, a suspension filler 232 loaded with nitrobacteria and contact oxidation sludge are arranged in the cylinder 23, the concentration of the contact oxidation sludge is 1500-3000 mg MLSS/L, the suspension filler is made of polyethylene hollow ring materials with the diameter of 10-20 mm, and the density of the suspension filler is 0.95-1.00 g/cm3The specific surface area is 400-700 m2/m3The porosity is 94-96%, the filling volume of the suspended filler 232 accounts for about 50% of the total effective volume of the area II in the cylinder, and the volume of the contact oxidation sludge accounts for about 30% of the effective volume of the area II in the cylinder.
With reference to fig. 2, flexible fillers 222 are disposed on two sides of the second through hole 221, a ceramsite filter material 223 loaded with denitrifying bacteria is disposed below the flexible fillers 222 in the outer region I of the inverted cone, and the porous ceramsite filter material 223 has a particle size of 5-8 mm and is disposed in layers.
With continued reference to fig. 1, the bottom of the cylinder 23 is provided with a conical cover 233 with an opening at the top, the top of the conical cover 233 is provided with a bell 234 for water vapor escape, the cylinder 23 is provided with an aeration pipe 235, and an aeration head 236 of the aeration pipe 235 aerates.
With continued reference to fig. 1, a first mud return gap 224 is provided between the surrounding cylinder area III and the cylinder lower area IV, and a second mud return gap 237 is provided between the cylinder inner area II and the cylinder lower area IV. The first mud returning seam 224 and the second mud returning seam 237 both adopt square holes, the aperture ratio is 20% -30%, and the side length of an orifice is 6-10 mm.
Example 2
The process of purifying the biological treatment of the culture wastewater is elaborated in detail by combining the ecological fish tank
1. Inoculated sludge and suspended filler
Inoculating a certain A2Activated sludge of a sewage plant, wherein the biological contact oxidation zone is inoculated with aerobic section sludge, and the concentration of the inoculated sludge is 2000mg MLSS/L; the start time of suspended filler biofilm formation is 15 days, and the ammonia removal load reaches 0.15kg N/(m)3D). The anaerobic sludge is inoculated in the membrane biological reaction zone, the sludge concentration is 1200mg MLSS/L, the film formation of the inoculated flexible filler and ceramsite filter material is 35 days, and the nitrogen and nitrogen removal load reaches 0.08kg N/(m3·d)
2. Parameter control
The water used for the experiment in this example is simulated aquaculture wastewater, which is prepared from 0.75g ammonium chloride, 20g fish feed and 100L tap water, and the influent COD is CODMn11.2mg/L of NH4 +The concentration of N is 2.65mg/L, TN is 5.9mg/L, TP is 1.3mg/L, DO concentration is 7.2mg/L, and pH is controlled to be 7.3-7.6.
Controlling parameters of the biological contact oxidation area: controlling the hydraulic retention time HRT of the reaction zone to be 7 hours, controlling the concentration range of dissolved oxygen to be 2-3.5 mg/L, and controlling the temperature of the reaction zone to be 10-30 ℃ at room temperature; the gas-water ratio is 1-3: 1. Controlling parameters of a membrane biological reaction zone: the hydraulic retention time HRT of the reaction zone is controlled to be 17 hours, the concentration range of the dissolved oxygen is 0.0-0.5 mg/L, and the temperature of the reaction zone is 10-30 ℃.
3. Running operation
Feeding nutrients (equivalent to the nutrients of 8L of wastewater) into the culture tank 10 in a simulated interval in proportion every day, feeding the nutrients into the cylinder 23 through the communicating pipe 40, and controlling the gas-water ratio to be (1-3): 1 by adjusting the gas inlet valve; the water in the purifying tank 20 is circulated by the water pump 51, and then returns to the cultivating tank 10 after being reoxygenated by the return pipe 52 and the surface reoxygenation nozzle 53, thus forming a circulation.
4. Result of operation
The ecological fish tank is started successfully after 35 days of operation, the COD concentration of the effluent is 2.0-3.5 mg/L, the average removal rate is 69.2 percent, and NH is added4 +The concentration of N effluent is 0.6-0.8 mg/L, the average removal rate is 71.3%, the concentration of TN effluent is 2.3-2.8 mg/L, the average removal rate is 63.2, the concentration of TP effluent is 0.95-1.10 mg/L, and the average removal rate is 20.1%.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or some or all of the technical features may be equivalently replaced, and such modifications or replacements may not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A biological treatment method for purifying aquaculture wastewater is characterized by comprising the following steps:
1) biological contact oxidation reaction: under the oxygen-enriched environment, nitrifying bacteria in the suspended filler oxidize ammonia in the wastewater into nitrate to carry out nitration reaction, organic carbon is biologically utilized, and part of phosphorus is absorbed in the growth process of microorganisms;
2) membrane biological reaction filtration: under the anoxic environment, the biological membrane absorbs organic matters in the wastewater, and the entered nitrate is subjected to denitrification reaction under the action of denitrifying bacteria in the porous ceramsite filter material to form nitrogen gas for release, so that the nitrogen in the wastewater is degraded, and in addition, the porous ceramsite filter material intercepts and filters the wastewater;
3) sludge settling separation: sludge subjected to biological contact oxidation reaction and membrane biological reaction filtration is compressed and settled, muddy water is discharged from gaps, and nutrients including nitrogen and phosphorus are reduced along with the discharge of the sludge.
2. The utility model provides a purify biological treatment device of aquaculture waste water, its characterized in that, including the cylinder body, set up the back taper section of thick bamboo in the cylinder body, set up at the drum of back taper section of thick bamboo central authorities and with the row mud pipeline that back taper section of thick bamboo osculum end links to each other, the cylinder body is divided into back taper section of thick bamboo in region and the back taper section of thick bamboo outer zone by the drum in the back taper section of thick bamboo the region is cut apart into the drum, surrounds drum region and drum below region, the region is biological contact oxidation reaction zone in the drum, surround drum region and back taper section of thick bamboo outer zone be membrane bioreaction filtering area the drum below region is the mud sedimentation disengagement zone, it exports the mud of mud sedimentation disengagement zone outside the cylinder body to arrange the mud pipeline.
3. The biological treatment device for purifying aquaculture wastewater as claimed in claim 2, wherein said cylindrical wall has a plurality of first through holes communicating with the cylindrical inner region and the surrounding cylindrical region, and said inverted cone wall has a plurality of second through holes communicating with the surrounding cylindrical region and the inverted cone outer region.
4. The biological treatment device for purifying aquaculture wastewater of claim 3 wherein the second through hole is horizontally mapped to the side wall of the cylinder at a position higher than the first through hole.
5. The biological treatment device for purifying aquaculture wastewater of claim 3, wherein the second through hole is provided with flexible fillers on two sides.
6. The biological treatment device for purifying the aquaculture wastewater as recited in claim 5, wherein the cylinder is internally provided with a suspended filler loaded with nitrobacteria, and a ceramsite filter material loaded with denitrifying bacteria is arranged below the flexible filler in the outer region of the inverted cone.
7. The biological treatment device for purifying aquaculture wastewater as claimed in claim 2, wherein the bottom of the cylinder is provided with a conical cover with an opening at the top, and the top of the conical cover is provided with a bell-shaped cover with a water vapor escape port.
8. The biological treatment device for purifying aquaculture wastewater according to claim 2, wherein an aeration pipe is arranged in the cylinder, and an aeration head of the aeration pipe performs aeration.
9. The biological treatment device for purifying aquaculture wastewater according to claim 2, wherein a first mud return gap is arranged between the surrounding cylinder area and the area below the cylinder, and a second mud return gap is arranged between the area inside the cylinder and the area below the cylinder.
10. A circulating purification cultivation device, which comprises a cultivation tank, the biological treatment device for purifying cultivation wastewater as claimed in any one of claims 2 to 9, which is separated from the cultivation tank, a communicating pipe for introducing the water in the cultivation tank into the biological treatment device for purifying cultivation wastewater, and a return system for returning the water in the biological treatment device for purifying cultivation wastewater to the cultivation tank.
CN202011105924.XA 2020-10-15 2020-10-15 Biological treatment method and device for purified cultivation wastewater and circulating purification cultivation device Active CN112279378B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2441794Y (en) * 2000-09-05 2001-08-08 胡志忠 Integrated processor for waste water
CN105036470A (en) * 2015-07-21 2015-11-11 常州大学 Pig farm waste water and manure processing system
CN106186548A (en) * 2016-08-23 2016-12-07 上海交通大学 A kind of marine culture wastewater processing system and processing method
WO2018107740A1 (en) * 2016-12-14 2018-06-21 江南大学 Wastewater nitrogen and phosphorus removal device and application thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2441794Y (en) * 2000-09-05 2001-08-08 胡志忠 Integrated processor for waste water
CN105036470A (en) * 2015-07-21 2015-11-11 常州大学 Pig farm waste water and manure processing system
CN106186548A (en) * 2016-08-23 2016-12-07 上海交通大学 A kind of marine culture wastewater processing system and processing method
WO2018107740A1 (en) * 2016-12-14 2018-06-21 江南大学 Wastewater nitrogen and phosphorus removal device and application thereof

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