CN110835223A - Device and method for treating antibiotics in bottom mud of aquaculture pond - Google Patents
Device and method for treating antibiotics in bottom mud of aquaculture pond Download PDFInfo
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- CN110835223A CN110835223A CN201911062377.9A CN201911062377A CN110835223A CN 110835223 A CN110835223 A CN 110835223A CN 201911062377 A CN201911062377 A CN 201911062377A CN 110835223 A CN110835223 A CN 110835223A
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- 239000003242 anti bacterial agent Substances 0.000 title claims abstract description 46
- 229940088710 antibiotic agent Drugs 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000009360 aquaculture Methods 0.000 title description 5
- 244000144974 aquaculture Species 0.000 title description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 137
- 238000006243 chemical reaction Methods 0.000 claims abstract description 112
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000000203 mixture Substances 0.000 claims abstract description 39
- 239000006228 supernatant Substances 0.000 claims abstract description 22
- 239000010865 sewage Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 52
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 32
- 239000001301 oxygen Substances 0.000 claims description 32
- 229910052760 oxygen Inorganic materials 0.000 claims description 32
- 239000010802 sludge Substances 0.000 claims description 30
- 238000002156 mixing Methods 0.000 claims description 15
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- 239000012535 impurity Substances 0.000 claims description 11
- 239000002808 molecular sieve Substances 0.000 claims description 10
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 10
- 230000003115 biocidal effect Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
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- YLZYSVYZMDJYOT-UHFFFAOYSA-N 2-methoxypyrimidine Chemical compound COC1=NC=CC=N1 YLZYSVYZMDJYOT-UHFFFAOYSA-N 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 239000004098 Tetracycline Substances 0.000 description 2
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- 239000000126 substance Substances 0.000 description 2
- SEEPANYCNGTZFQ-UHFFFAOYSA-N sulfadiazine Chemical compound C1=CC(N)=CC=C1S(=O)(=O)NC1=NC=CC=N1 SEEPANYCNGTZFQ-UHFFFAOYSA-N 0.000 description 2
- 229960004306 sulfadiazine Drugs 0.000 description 2
- 229940124530 sulfonamide Drugs 0.000 description 2
- 150000003456 sulfonamides Chemical class 0.000 description 2
- 235000019364 tetracycline Nutrition 0.000 description 2
- 150000003522 tetracyclines Chemical class 0.000 description 2
- 229940040944 tetracyclines Drugs 0.000 description 2
- KEQXNNJHMWSZHK-UHFFFAOYSA-L 1,3,2,4$l^{2}-dioxathiaplumbetane 2,2-dioxide Chemical compound [Pb+2].[O-]S([O-])(=O)=O KEQXNNJHMWSZHK-UHFFFAOYSA-L 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- 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
Abstract
The invention discloses a device and a method for treating antibiotics in bottom mud of a culture pond, wherein the device comprises: a pretreatment tank (6), a reaction tank (7), a micro-bubble generation system and an ozone generator (13), wherein the inlet of the pretreatment tank (6) is connected with a vibrating screen (4) and a submersible sewage pump (3), the bottom mud of the culture pond is obtained through a vibrating screen (4), clear water is obtained through a submersible sewage pump (3), the bottom mud and the water entering a pretreatment tank (6) are fully mixed and then enter a reaction tank (7) to react with micro-bubble ozone in the reaction tank (7), to remove antibiotics in the mud-water mixture, the reaction tank (7) is connected with the micro-bubble generation system through a pipeline, the reacted supernatant flows into the micro-bubble generation system through the pipeline, the micro-bubble generation system is connected with an ozone generator (13), so as to connect ozone into the microbubble generating system, the ozone and the supernatant from the reaction tank (7) are fully mixed to generate microbubble ozone, and then the microbubble ozone flows back to the reaction tank (7).
Description
Technical Field
The invention relates to the technical field of bottom sediment remediation of environmental engineering, in particular to a device and a method for treating antibiotics in bottom sediment of a culture pond.
Background
Antibiotics are a kind of artificially synthesized antibacterial and anti-inflammatory drugs with stable chemical structure, low price and wide use, are often applied to treatment of human or animals, and can also be used as a growth promoter to be added into animal feed, and partial metabolites or parent bodies thereof migrate into the environment to easily cause certain environmental risks. Under the current condition of increasing and breeding technology, because production operation lacks strict specifications and management, in order to control various fish diseases, a certain antibiotic agent is often used, and various antibiotic pollutions, such as sulfonamides, quinolones, tetracyclines and amidoalcohols, are detected in a fishpond water body, a peripheral water body and fishpond sediment.
Common antibiotic removal methods include activated sludge, oxidation, adsorption, electrochemical treatment, membrane, ultrasound, microbial degradation, and plant treatment. The application is rare or difficult to implement in the treatment of antibiotics in the bottom mud of the culture pond. Ozone is a strong oxidant, has a high oxidation-reduction potential, and can directly or indirectly perform oxidation reaction with organic matters. The ozone has good removal effect on antibiotics such as sulfonamides, quinolones, tetracyclines, lincomamines, macrolides and the like, has the advantages of small occupied area, good stability and the like when being used for removing the antibiotics in the pond bottom sludge, has wide application prospect, mostly adopts modes such as a common aeration disc, a micropore aeration disc, jet flow and the like in the ozone oxidation technology at present, but has the defects of high ozone escape rate, large adding amount and high cost. Therefore, an integrated device and a method which are low in cost, small in ozone adding amount, high in ozone utilization rate, stable in operation and not prone to blockage are urgently needed in the field of bottom mud treatment of environmental engineering culture ponds.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a device and a method for treating antibiotics in bottom mud of a culture pond, so that the bottom mud of the culture pond is treated by micro-bubble ozone to remove the antibiotics in the bottom mud of the culture pond.
In order to achieve the above object, the present invention provides an apparatus for treating antibiotics in bottom mud of a pond, comprising: pretreatment tank (6), reaction tank (7), microbubble system and ozone generator (13) take place, pretreatment tank (6) entry is connected shale shaker (4) and stealthily dirty pump (3), in order to pass through shale shaker (4) obtain breed pond bed mud and pass through stealthily dirty pump (3) obtain the clear water, get into after the bed mud and the water intensive mixing of pretreatment tank (6) get into reaction tank 7, with microbubble ozone in reaction tank (7) reacts to the antibiotic in the mud-water mixture is got rid of to the strong oxidizing property that utilizes microbubble ozone, reaction tank (7) with microbubble system passes through the pipe connection, and the supernatant after the reaction passes through the pipeline flows into microbubble system, microbubble system with ozone generator (13) link to each other, the ozone access that ozone generator (13) produced microbubble system, and fully mixing ozone with the supernatant from the reaction tank (7) to generate microbubble ozone, and then refluxing the microbubble ozone to the reaction tank (7).
Preferably, the micro-bubble generation system comprises a pressurizing gas-liquid circulating pump (12), and the pressurizing gas-liquid circulating pump (12) is connected with the ozone generator (13) and the reaction tank (7) so as to fully mix the supernatant from the reaction tank (7) and the ozone from the ozone generator (13) and generate ozone micro-nano bubbles to enter the reaction tank (7).
Preferably, the microbubble generation system further comprises a gas-liquid releaser (10) connected between the pressurizing gas-liquid circulating pump (12) and the reaction tank (7), and a gas-liquid mixture mixed with microbubble ozone generated by the pressurizing gas-liquid circulating pump (12) uniformly enters the reaction tank (7) after passing through the gas-liquid releaser (10).
Preferably, a vacuum meter (9) is arranged at a position, close to the ozone generator (13), of a connecting pipeline between the pressurization gas-liquid circulating pump (12) and the ozone generator (13), a gas flowmeter (11) is arranged at a position, close to the pressurization gas-liquid circulating pump (12), a ball valve (17) is arranged between the vacuum meter (9) and the ozone generator (13), and gate valves (15) are arranged between the vacuum meter (9) and the gas flowmeter (11) and between the gas flowmeter (11) and the pressurization gas-liquid circulating pump (12).
Preferably, the ozone generator (13) is further connected to an oxygen production system (14) to obtain a source of oxygen.
Preferably, the oxygen generation system (14) adopts a molecular sieve oxygen generator, the molecular sieve oxygen generator takes a molecular sieve as an adsorbent, and the oxygen is adsorbed and released from the air by utilizing the principles of pressurized adsorption and decompression analysis, so that the oxygen is separated from the air holes.
Preferably, the vibrating screen (4) is a full-automatic vibrating screen, three-dimensional motion force is transmitted to the vibrating screen by using a vibrating body and a spring through three-dimensional motion of a vibrating motor, and the motion track of the material on the screen surface is realized by changing the phase angle of an upper heavy hammer and a lower heavy hammer of the vibrating motor, so that the purposes of screening, impurity removal and filtration are achieved.
Preferably, an entrance of the pretreatment tank (6) is provided with an interception grating for further removing impurities.
Preferably, the reaction tank (7) is connected with a vent pipe (8) at the bottom of the pretreatment tank (6) so as to vent the treated bottom sludge.
Preferably, stirrers (5) are arranged in the pretreatment tank (6) and the reaction tank (7) so as to fully mix the bottom mud and the water and fully react the mud-water mixture with the microbubble ozone.
In order to achieve the aim, the invention also provides a method for treating antibiotics in the bottom mud of the culture pond, which comprises the following steps:
step S1, placing the bottom mud after pond cleaning on a vibrating screen, filtering the bottom mud by using the vibrating screen, and then sending the bottom mud into a pretreatment pond, and meanwhile, accessing the clear water of the culture pond into the pretreatment pond through a submersible sewage pump;
step S2, mixing the mud-water mixture through the pretreatment tank, intercepting sundries such as branches and the like, then entering a reaction tank, reacting with the microbubble ozone in the reaction tank, removing antibiotics in the mud-water mixture by utilizing the strong oxidizing property of the microbubble ozone, and discharging bottom mud obtained through reaction treatment and sedimentation collection through an emptying pipe at the bottom of the reaction tank;
and step S3, the reacted supernatant on the upper part of the reaction tank is used for being fully mixed with ozone by a pressurized dissolved air pump to generate microbubble ozone, and the supernatant mixed with the microbubble ozone is refluxed to the reaction tank to continuously provide the microbubble ozone for the reaction tank.
Compared with the prior art, the device and the method for treating the antibiotics in the bottom mud of the culture pond have the advantages that the bottom mud after pond cleaning is placed on the vibrating screen, the bottom mud is filtered by the vibrating screen and then is sent into the pretreatment pond, meanwhile, the clear water of the culture pond is connected into the pretreatment pond through the submersible sewage pump, the bottom mud and the water are mixed in the pretreatment pond, the impurities such as branches and the like are intercepted, then the mixture enters the reaction pond and reacts with the microbubble ozone in the reaction pond, the antibiotics in the mud-water mixture are removed by using the strong oxidizing property of the microbubble ozone, meanwhile, the reacted supernatant on the upper part of the reaction pond is used for being fully mixed with the ozone by using the pressurizing dissolved air pump to generate the microbubble ozone, the supernatant mixed with the microbubble ozone flows back to the reaction pond, the microbubble ozone is continuously provided for the reaction pond, and the culture bottom mud is treated by the microbubble ozone, the purpose of removing antibiotics in the bottom mud of the culture pond is achieved.
Drawings
FIG. 1 is a system configuration diagram of an apparatus for treating antibiotics in bottom sludge of a pond according to the present invention;
FIG. 2 is a flow chart showing the steps of a method for treating antibiotics in bottom sludge of a pond according to the present invention.
Detailed Description
Other advantages and capabilities of the present invention will be readily apparent to those skilled in the art from the present disclosure by describing the embodiments of the present invention with specific embodiments thereof in conjunction with the accompanying drawings. The invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention.
FIG. 1 is a system configuration diagram of an apparatus for treating antibiotics in bottom sludge of a pond according to the present invention. As shown in figure 1, the device for treating antibiotics in bottom mud of the culture pond is a container type integrated device, and comprises: the device comprises a pretreatment tank 6, a reaction tank 7, a micro-bubble generation system and an ozone generator 13, wherein the inlet of the pretreatment tank 6 is connected with a vibrating screen 4 through a mud inlet pipe, the bottom sludge 2 of the culture pond is removed impurities by a vibrating screen and then is sent into a pretreatment tank 6, that is, the bottom sludge of the culture pond passes through the vibrating screen 4, branches, gravels and shells in the bottom sludge are removed by the vibrating screen 4 and then enters the pretreatment tank 6, the inlet of the pretreatment tank 6 is also connected with a submersible sewage pump 3 by a water inlet pipe, and is connected with a clear water 1 of the culture pond, the clear water of the culture pond is connected into the pretreatment tank 6 through a submersible sewage pump 3 to be mixed with the sediment, the sediment and the water enter the pretreatment tank 6 to be fully mixed, preferably, an entrance of the pretreatment tank 6 is provided with an interception grating, the method aims to prevent branches, leaves and the like from blocking pipelines, namely, the bottom mud 2 of the culture pond enters a pretreatment pond 6 after passing through a vibrating screen 4 and a grid; the export of pretreatment tank 6 also sets up the interception grid, further clears away the branch leaf in the bed mud, and the muddy water mixture passes through entering reaction tank 7 behind pretreatment tank 6 mixes and intercepts debris such as branch, pretreatment tank 6 with divide the region through setting up the baffle between the 7 cell bodies of reaction tank, be equipped with the mouth of flow on the baffle, promptly pretreatment tank 6 export to with the muddy water mixture of pretreatment tank 6 gets into reaction tank 7 through the mouth of flow, also set up the interception grid on the mouth of flow, send into reaction tank 7 after further driving debris such as branch leaf in the muddy water mixture, reaction tank 7 upper portion and microbubble generating system pass through the pipe connection, and the microbubble ozone that gets into in reaction tank 7 reacts with the microbubble ozone in the reaction tank 7, utilizes the strong oxidizing property of microbubble ozone to get rid of the antibiotic in the muddy water mixture, deposit statically after the reaction, the supernatant (being water) flows in through the pipeline the microbubble generating system, the microbubble generating system still links to each other with ozone generator 13, the ozone access that ozone generator 13 produced the microbubble generating system makes ozone and the supernatant (being water) intensive mixing that comes from reaction tank 7 through the gas-liquid circulating pump, and gas-liquid mixture water gets into the pressurization dissolved air pump, releases the micro-nano bubble of ozone and gets into reaction tank 7 reacts with the antibiotic in the muddy water mixture, blow-down pipe 8 is connected to the bottom of reaction tank 7, and the bed mud of processing by blow-down pipe 8 of reaction tank 7 bottom discharges to after the reaction in reaction tank 7 is accomplished, discharge the water of reaction tank 7, in order to avoid reaction tank 7 to send out better ground, blow-down pipe 8 is also connected to the bottom of preliminary treatment tank 6, in order to avoid preliminary treatment tank 6 to be smelly.
Preferably, the pretreatment tank 6 and the reaction tank 7 are both provided with stirrers so as to fully mix the bottom mud and the water and fully react the mud-water mixture with the micro-bubble ozone.
In the present invention, the ozone generator 13 is connected to the oxygen generation system 14 to obtain an oxygen source, in a specific embodiment of the present invention, the oxygen generation system 14 employs a molecular sieve oxygen generator, the molecular sieve oxygen generator uses a molecular sieve as an adsorbent, and adsorbs and releases oxygen from air by using the principles of pressure adsorption and pressure reduction analysis, so as to separate oxygen from air holes, wherein the oxygen concentration can reach 95%, and the oxygen is introduced into the ozone generator as an oxygen source, so as to be used for preparing high-concentration ozone.
The micro-bubble generation system comprises a pressurizing gas-liquid circulating pump 12, wherein the pressurizing gas-liquid circulating pump 12 is connected with the ozone generator 13 and the reaction tank 7 so as to fully mix water from the reaction tank 7 and ozone from the ozone generator 13 and generate ozone micro-nano bubbles to enter the reaction tank 7, namely, a gas-liquid mixture mixed with micro-bubble ozone flows back to the reaction tank 7 so as to continuously provide the micro-bubble ozone for the reaction tank 7. In the invention, the pressurized gas-liquid circulating pump 12 is adopted to increase the contact area of ozone and water, which is beneficial to fully mixing ozone and water, and micro bubbles generated by the ozone generator 13 under the action of the pressurized gas-liquid circulating pump 12 can excite the generation of hydroxyl radicals, which shows stronger oxidizing ability. Preferably, the gas-liquid mixture mixed with the microbubble ozone generated by the pressurized gas-liquid circulating pump 12 passes through the gas-liquid releaser 10 and then uniformly enters the reaction tank 7, and a section of the gas-liquid releaser 10 is preferably provided with a straight pipe 19 so as to facilitate the thorough mixing of the microbubble and the bottom sediment mixed liquid.
Preferably, since there are some impurities entering into the gas-liquid releaser 10, it is necessary to repair and empty it, and a service hole 16 including a straight pipe and a ball valve is connected to the lower end of the gas-liquid releaser 10 for easy maintenance.
Preferably, a vacuum meter 9 is arranged on a connecting pipeline between the pressurized gas-liquid circulating pump 12 and the ozone generator 13 near the ozone generator 13 for measuring negative pressure, when water flows through, negative pressure is generated on a pipe wall, a gas flowmeter 11 is arranged near the pressurized gas-liquid circulating pump 12, a ball valve 17 is arranged between the vacuum meter 9 and the ozone generator 13, and gate valves 15 are arranged between the vacuum meter 9 and the gas flowmeter 11 and between the gas flowmeter 11 and the pressurized gas-liquid circulating pump 12; a vacuum meter 9 is arranged on a connecting pipeline between the reaction tank 7 and the pressurizing gas-liquid circulating pump 12, and a gate valve 15 is arranged between the vacuum meter 9 and the reaction tank 7; a vacuum gauge 9 is also provided in a connection pipe between the gas-liquid releaser 10 and the reaction tank 7, a gate valve 15 is provided between the vacuum gauge 9 and the reaction tank 7, a check valve 18 is provided between the gate valve 15 and the vacuum gauge 9, and a check valve 18 is also provided between the pressurized gas-liquid circulation pump 12 and the gas-liquid releaser 10.
In the embodiment of the present invention, the vibrating screen 4 is a fully automatic vibrating screen for effectively preventing large-particle impurities in the bottom mud from blocking the pipeline. The full-automatic vibrating screen mainly comprises a feeding hole, a screen box, a screen, a vibrating motor, a net rack, a base, a heavy hammer, a spring and a discharging hole (the full-automatic vibrating screen adopts the existing structure and is not repeated here), the screen with different meshes can be selected to separate large-particle substances such as shells, gravels, branches and the like in bottom mud, the vibrating screen 4 utilizes the three-dimensional motion of the vibrating motor, the vibrating body and the spring to transmit the three-dimensional motion force to the vibrating screen, the motion track of the materials on the screen surface is realized by changing the phase angle of the upper heavy hammer and the lower heavy hammer of the vibrating motor, and therefore the purposes of screening, impurity removal and filtration are achieved, and the branches, the gravels and the shells in the bottom mud can be removed.
Preferably, the top of the reaction tank 7 is provided with an overflow port to prevent water in the reaction tank 7 from overflowing. The overflow is typically located about 5cm below the top.
FIG. 2 is a flow chart showing the steps of a method for treating antibiotics in bottom sludge of a pond according to the present invention. As shown in figure 2, the method for treating antibiotics in the bottom mud of the aquaculture pond comprises the following steps:
and step S1, placing the bottom mud after pond cleaning on a vibrating screen, filtering the bottom mud by using the vibrating screen, and then sending the bottom mud into a pretreatment pond, and meanwhile, accessing the clear water of the culture pond into the pretreatment pond through a submersible sewage pump. In a specific embodiment of the invention, the vibrating screen utilizes the three-dimensional motion of a vibrating motor, and utilizes a vibrating body and a spring to transmit the three-dimensional motion force to a vibrating screen. The motion trail of the material on the screen surface is realized by changing the phase angle of the upper and lower heavy hammers of the vibration motor, so that the purposes of screening, impurity removal and filtration are achieved, and branches, broken stones and shells in the bottom mud can be removed.
And step S2, mixing the mud-water mixture by the pretreatment tank, intercepting sundries such as branches and the like, then feeding the mixture into the reaction tank 7, reacting the mixture with the microbubble ozone in the reaction tank, removing antibiotics in the mud-water mixture by utilizing the strong oxidizing property of the microbubble ozone, and discharging the bottom mud subjected to reaction treatment and collected by precipitation from an emptying pipe at the bottom of the reaction tank.
Specifically, bottom mud and water which are treated by the vibrating screen enter a pretreatment tank and are fully mixed, an interception grating is arranged at an outlet of the pretreatment tank to prevent branches, leaves and the like from blocking a pipeline, the mud-water mixture is mixed by the pretreatment tank and enters a reaction tank after intercepting sundries such as the branches and the like, the mud-water mixture reacts with microbubble ozone in the reaction tank, and antibiotics in the mud-water mixture are removed by utilizing the strong oxidizing property of the microbubble ozone. The reaction time is controlled to be 10-30 min. And (5) standing and precipitating for 10-20 min after the reaction is finished, and separating mud from water.
And step S3, the reacted supernatant on the upper part of the reaction tank is used for being fully mixed with ozone by a pressurized dissolved air pump to generate microbubble ozone, and the supernatant mixed with the microbubble ozone is refluxed to the reaction tank to continuously provide the microbubble ozone for the reaction tank.
The workflow of the present invention will be illustrated by a specific example:
in a specific embodiment of the invention, the ozone generator: 200g/h, which is an on-site oxygen generation type; addingA compressed gas liquid circulating pump: 12m3H; the total volume of the integrated reaction equipment is 3.6m3316L material; the pressurizing gas-liquid circulating pump is a pressurizing dissolved air pump needing ozone resistance, a sampling port is arranged on a proper pipeline, measures for preventing gas backflow are needed, and the ozone generator is connected with a three-way valve and used for adding residual ozone.
The water level of the bottom mud after the culture pond is cleaned is lower than 20cm, after obviously flowing water is removed, the water content in the bottom mud is about 45 percent, and the bottom mud contains humus, organic matters, soil particles, partial leaves, silt and branches and has poor fluidity.
When the device for treating antibiotics in the bottom sludge of the aquaculture pond works, firstly, the bottom sludge after pond cleaning is placed on the vibrating screen 4, the vibrating screen utilizes the three-dimensional motion of the vibrating motor, the vibrating body and the spring to transmit the three-dimensional motion force to the vibrating screen, and the motion track of materials on the screen surface is realized by changing the phase angle of the upper and lower heavy hammers of the vibrating motor, so that the purposes of screening, impurity removal and filtration are achieved, and branches, gravels and shells in the bottom sludge can be removed.
The sediment that finishes 4 processings of shale shaker send into in the preliminary treatment pond 6 to will breed the pond clear water and insert preliminary treatment pond 6 through stealthily dirty pump 3, in preliminary treatment pond 6, water and sediment intensive mixing, preliminary treatment pond export sets up the interception grid, and the purpose prevents that branch, leaf etc. from blockking up the pipeline.
Setting the relevant parameters of the oxygen generator of the oxygen generation system 14: the outlet pressure of the oxygen generator is adjusted to 0.08MP, and the outlet flow is adjusted to 20L/Min.
The relevant parameters of the ozone generator 13 are set, and the power percentage is adjusted to 10%.
Set up the relevant parameter of pressurization gas-liquid circulation pump 12, the flow of at first fixed pressurization gas-liquid circulation pump 12 is 10m3/h, change the circulating pump and advance, outlet pressure carries out the experiment, whether there is the production of micro-nano bubble in the observation reaction tank 7, when outlet pressure is 0.05 ~ 0.25MPa, it produces to find to have a big bubble to look at, reaction tank 7 is transparent, show that only a small amount of micro-nano bubble produces, when outlet pressure is 0.25 ~ 0.40MPa, it shows that reaction tank 7 presents milk white to look at, show that there is a large amount of micro-nano bubble to produce, when outlet pressure is for exceeding 0.40MPa, the discharge valve of pipeline behind the pump is frequent, and pressurization gas-liquid circulation pump 12 vibrates comparatively badly.
And mixing the mud-water mixture through the pretreatment tank 6, intercepting sundries such as branches and the like, then feeding the mixture into the reaction tank 7, reacting the mixture with the microbubble ozone in the reaction tank 7, removing antibiotics in the mud-water mixture by utilizing the strong oxidizing property of the microbubble ozone, controlling the reaction time to be 10-30 min, standing and precipitating for 10-20 min after the reaction is finished, and separating mud from water.
Meanwhile, the supernatant on the upper part of the reaction tank 7 is used for mixing with ozone and fully mixing with a pressurized gas-liquid circulating pump 12 to generate micro-bubble ozone, and the supernatant mixed with the micro-bubble ozone flows back to the reaction tank 7 to continuously provide the micro-bubble ozone for the reaction tank.
The bottom sludge after reaction treatment and sedimentation collection is discharged from a vent pipe at the bottom of the reaction tank 7.
Example 1
At 1m3The reactor (2) is filled with water, 100kg of water-containing bottom mud is weighed into the reactor, and antibiotic mother liquor with certain concentration is weighed and diluted to 1m3The raw water is evenly stirred, the concentration of the methoxypyrimidine in the sediment is 20ug/kg, a pressurized gas-liquid circulating pump is started, and the flow of the gas-liquid circulating pump is adjusted by an adjusting valve to be 8.0m3Adjusting the air input to be 20-30L/min and the pressure of an outlet pipeline to be 0.3-0.4 Mpa; and (3) sequentially opening a cooling water machine (a device directly arranged on the ozone generator), the oxygen generator and the ozone generator, wherein the temperature of the cooling water is set to be 25 ℃, the reaction time is 10-30 min, and the removal rate of the methoxypyrimidine in the bottom sediment is more than 50%.
Example 2
At 1m3The reactor (2) is filled with water, 80kg of water-containing bottom mud is weighed into the reactor, and antibiotic mother liquor with certain concentration is weighed and diluted to 1m3Uniformly stirring the raw water, wherein the concentration of sulfadiazine in the bottom mud is 25ug/kg, starting a pressurized gas-liquid circulating pump, adjusting the flow of the gas-liquid circulating pump to be 9.0m3/h through an adjusting valve, adjusting the air inflow to be 20-25L/min, and adjusting the pressure of an outlet pipeline to be 0.3-0.4 Mpa; sequentially opening the device (directly on the ozone generator), the oxygen generator and the ozone generator,the cooling water is set at 25 ℃, the reaction time is 10-30 min, and the removal rate of sulfadiazine in the bottom mud is more than 60%.
In conclusion, the device and the method for treating antibiotics in the bottom sludge of the aquaculture pond are characterized in that the bottom sludge after pond cleaning is placed on the vibrating screen, the bottom sludge is filtered by the vibrating screen and then is sent to the pretreatment pond, meanwhile, clear water in the culture pond is connected into the pretreatment tank through a submersible sewage pump, sediment and water are mixed in the pretreatment tank, and the clear water enters a reaction tank after intercepting sundries such as branches and the like, reacting with microbubble ozone in the reaction tank, removing antibiotics in the muddy water mixture by utilizing the strong oxidizing property of the microbubble ozone, meanwhile, the supernatant on the upper part of the reaction tank after reaction is used for being fully mixed with ozone by utilizing a pressurized dissolved air pump to generate microbubble ozone, and the supernatant mixed with the microbubble ozone flows back to the reaction tank, and the microbubble ozone is continuously provided for the reaction tank, so that the aims of treating the bottom sludge of the culture pond by using the microbubble ozone and removing the antibiotics in the bottom sludge of the culture pond are fulfilled.
Compared with the prior art, the invention has the following advantages:
1. the invention adopts a micro-bubble generation system, can generate micron or even nanometer ozone bubbles, has long retention time and high mass transfer rate, and can effectively improve the utilization efficiency of ozone. In the process of contacting the bottom mud of the culture pond with the microbubble ozone, the microbubble ozone with strong oxidizing property can efficiently remove antibiotics in the bottom mud.
2. The invention increases the pressurizing dissolved air pump, improves the contact area of ozone and water, is beneficial to fully mixing the ozone and the water, and reduces the using amount of the ozone.
3. Because the generated micro bubbles can excite the generation of hydroxyl radicals under the action of the dissolved air pump, the generated micro bubbles show stronger oxidizing capability, and compared with the prior art, the method can utilize less ozone, has simple and convenient process control and is easy to realize.
4. The invention relates to a container type integrated device. The occupied area is small, the automation degree is high, and the antibiotics in the bottom sludge of the culture pond can be effectively treated.
5. The invention adopts the full-automatic vibrating screen, and can effectively prevent large-particle impurities in the bottom mud from blocking the pipeline.
6. The invention adopts the molecular sieve oxygen generator which is beneficial to improving the oxygen concentration, is convenient to prepare high-concentration ozone, further improves the oxidation efficiency, can quickly decompose antibiotics in the bottom sludge and improves the removal efficiency of the antibiotics.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the scope of the invention should be determined from the following claims.
Claims (10)
1. A device for treating antibiotics in bottom mud of a culture pond comprises: pretreatment tank (6), reaction tank (7), microbubble system and ozone generator (13) take place, pretreatment tank (6) entry is connected shale shaker (4) and stealthily dirty pump (3), in order to pass through shale shaker (4) obtain breed pond bed mud and pass through stealthily dirty pump (3) obtain the clear water, get into after the bed mud and the water intensive mixing of pretreatment tank (6) get into reaction tank 7, with microbubble ozone in reaction tank (7) reacts to the antibiotic in the mud-water mixture is got rid of to the strong oxidizing property that utilizes microbubble ozone, reaction tank (7) with microbubble system passes through the pipe connection, and the supernatant after the reaction passes through the pipeline flows into microbubble system, microbubble system with ozone generator (13) link to each other, the ozone access that ozone generator (13) produced microbubble system, the ozone and the supernatant liquid from the reaction tank (7) are fully mixed to generate microbubble ozone, and then the microbubble ozone flows back to the reaction tank (7).
2. The apparatus for treating antibiotics in pond bottom sludge according to claim 1, wherein: the microbubble generation system comprises a pressurizing gas-liquid circulating pump (12), the pressurizing gas-liquid circulating pump (12) is connected with the ozone generator (13) and the reaction tank (7) so as to fully mix the supernatant from the reaction tank (7) and the ozone from the ozone generator (13) to generate ozone micro-nano bubbles to enter the reaction tank (7).
3. The apparatus for treating antibiotics in pond bottom sludge according to claim 2, wherein: the microbubble generation system comprises a gas-liquid releaser (10) and is connected with a pressurizing gas-liquid circulating pump (12) and a reaction tank (7), and a gas-liquid mixture which is mixed with microbubble ozone and is generated by the pressurizing gas-liquid circulating pump (12) passes through the gas-liquid releaser (10) and then uniformly enters the reaction tank (7).
4. The apparatus for treating antibiotics in pond bottom sludge according to claim 3, wherein: the ozone generator is characterized in that a vacuum meter (9) is arranged at the position, close to the ozone generator (13), of a connecting pipeline of the pressurizing gas-liquid circulating pump (12) and the ozone generator (13), a gas flowmeter (11) is arranged at the position, close to the pressurizing gas-liquid circulating pump (12), a ball valve (17) is arranged between the vacuum meter (9) and the ozone generator (13), and gate valves (15) are arranged between the vacuum meter (9) and the gas flowmeter (11) and between the gas flowmeter (11) and the pressurizing gas-liquid circulating pump (12).
5. The apparatus for treating antibiotics in pond bottom sludge according to claim 1, wherein: the ozone generator (13) is also connected with an oxygen production system (14) to obtain an oxygen source.
6. The apparatus for treating antibiotics in pond bottom sludge according to claim 5, wherein: the oxygen generation system (14) adopts a molecular sieve oxygen generator, the molecular sieve oxygen generator takes a molecular sieve as an adsorbent, and the principles of pressurized adsorption and depressurization analysis are utilized to adsorb and release oxygen from air, so that the oxygen is separated from air holes.
7. The apparatus for treating antibiotics in pond bottom sludge according to claim 1, wherein: an intercepting grid is arranged at the inlet of the pretreatment tank (6) to further remove impurities.
8. The apparatus for treating antibiotics in pond bottom sludge according to claim 1, wherein: and the bottom of the reaction tank (7) and the bottom of the pretreatment tank (6) are connected with a vent pipe (8) so as to vent the treated bottom sludge.
9. The apparatus for treating antibiotics in pond bottom sludge according to claim 1, wherein: all set up agitator (5) in preliminary treatment pond (6) and reaction tank (7) to make sediment and water intensive mixing, and muddy water mixture and microbubble ozone intensive reaction.
10. A method for treating antibiotics in bottom mud of a culture pond comprises the following steps:
step S1, placing the bottom mud after pond cleaning on a vibrating screen, filtering the bottom mud by using the vibrating screen, and then sending the bottom mud into a pretreatment pond, and meanwhile, accessing the clear water of the culture pond into the pretreatment pond through a submersible sewage pump;
step S2, mixing the mud-water mixture through the pretreatment tank, intercepting sundries such as branches and the like, then entering a reaction tank, reacting with the microbubble ozone in the reaction tank, removing antibiotics in the mud-water mixture by utilizing the strong oxidizing property of the microbubble ozone, and discharging bottom mud obtained through reaction treatment and sedimentation collection through an emptying pipe at the bottom of the reaction tank;
and step S3, the reacted supernatant on the upper part of the reaction tank is used for being fully mixed with ozone by a pressurized dissolved air pump to generate microbubble ozone, and the supernatant mixed with the microbubble ozone is refluxed to the reaction tank to continuously provide the microbubble ozone for the reaction tank.
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