CN214257662U - Purifying and breeding wastewater biological treatment device and circulating and purifying breeding device - Google Patents
Purifying and breeding wastewater biological treatment device and circulating and purifying breeding device Download PDFInfo
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- CN214257662U CN214257662U CN202120190756.2U CN202120190756U CN214257662U CN 214257662 U CN214257662 U CN 214257662U CN 202120190756 U CN202120190756 U CN 202120190756U CN 214257662 U CN214257662 U CN 214257662U
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Abstract
The utility model belongs to the technical field of breed waste water aquatic biological treatment, concretely relates to purify breed waste water biological treatment device and circulation and purify breeding device. 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. The utility model provides a technical scheme gets rid of and will be rich phosphorus sludge and get rid of and fall the phosphorus through the surplus sludge that will breed waste water through biological contact oxidation nitrification and falling carbon, membrane bioreaction and filtration denitrification denitrogenation and decarbonization, mud sedimentation disengagement zone, reaches the purpose that high-efficient denitrogenation decarbonized, and the design of unique back taper section of thick bamboo makes in the water impurity get rid of efficiency higher.
Description
Technical Field
The utility model belongs to the technical field of breed waste water aquatic biological treatment, concretely relates to purify breed waste water biological treatment device and circulation and purify breeding 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.
SUMMERY OF THE UTILITY MODEL
The utility model provides a purify aquaculture waste water biological treatment device and circulation and purify breeding device for solve the problem of the current situation that current aquaculture waste water is not discharged up to standard by abundant rational utilization and waste water.
In order to solve the technical problem, the technical scheme of the utility model is that: purify aquaculture waste water biological treatment device, it includes the cylinder body, sets 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's 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 in, encircles drum region and drum below region, the region is biological contact oxidation reaction zone in the drum, encircle drum region and back taper section of thick bamboo outer zone for 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.
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 utility model also provides a circulation purifies breeding device, its including breed the jar, with breed the above-mentioned purification of jar baffle breed waste water biological treatment device, with the water of breeding the jar introduce purify breed waste water biological treatment device's communicating pipe and will purify breed waste water biological treatment device's water and lead back the return flow system of breeding the jar.
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.
The utility model provides a technical scheme gets rid of and will be rich phosphorus sludge and get rid of and fall the phosphorus through the surplus sludge that will breed waste water through biological contact oxidation nitrification and falling carbon, membrane bioreaction and filtration denitrification denitrogenation and decarbonization, mud sedimentation disengagement zone, reaches the purpose that high-efficient denitrogenation decarbonized, and the design of unique back taper section of thick bamboo makes in the water impurity get rid of efficiency higher.
Drawings
FIG. 1 is a schematic structural view of a specific 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 and device for purifying aquaculture wastewater and the circulating purification aquaculture device are described in the following examples, which are only used for illustrating the present invention and are not intended to limit 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", and the like indicate orientations and positional relationships based on the orientation and positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be interpreted broadly, and may be, for example, a fixed connection, a detachable connection or an integral connection; 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 meaning 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 breeding 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 embodiments are only used to illustrate the technical solution of the present invention, and not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments or equivalents may be substituted for some or all of the features thereof without departing from the scope of the present invention.
Claims (10)
1. 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.
2. The biological treatment device for purifying aquaculture wastewater as claimed in claim 1, 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.
3. The biological treatment device for purifying aquaculture wastewater of claim 2 wherein the second through hole is horizontally mapped to the side wall of the cylinder at a position higher than the first through hole.
4. The biological treatment device for purifying aquaculture wastewater of claim 2, wherein the second through hole is provided with flexible fillers on two sides.
5. The biological treatment device for purifying the aquaculture wastewater as recited in claim 4, 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.
6. The biological treatment device for purifying aquaculture wastewater as claimed in claim 1, wherein the bottom of said cylinder is provided with a conical cover with an opening at the top, and the top of said conical cover is provided with a bell-shaped cover with a water vapor escape port.
7. The biological treatment device for purifying aquaculture wastewater according to claim 1, wherein an aeration pipe is arranged in the cylinder, and an aeration head of the aeration pipe performs aeration.
8. The biological treatment device for purifying aquaculture wastewater according to claim 1, 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.
9. 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 1 to 8, 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.
10. The circulation purification cultivation device of claim 9, wherein one end of the communicating pipe is located below the water level of the cultivation tank, and the other end of the communicating pipe is a water inlet of the biological treatment device for purifying cultivation 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.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020223024726 | 2020-10-15 | ||
| CN202022302472 | 2020-10-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214257662U true CN214257662U (en) | 2021-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120190756.2U Active CN214257662U (en) | 2020-10-15 | 2021-01-25 | Purifying and breeding wastewater biological treatment device and circulating and purifying breeding device |
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| CN (1) | CN214257662U (en) |
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2021
- 2021-01-25 CN CN202120190756.2U patent/CN214257662U/en active Active
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