Breeding wastewater purification device for immobilizing microbial community by using ceramsite

Abstract

The invention belongs to the technical field of aquaculture wastewater purification, and discloses an aquaculture wastewater purification device for immobilizing microbial communities by using ceramsite. According to the breeding wastewater purification device for immobilizing the microbial community by using the ceramsite, provided by the invention, solid precipitates in the breeding wastewater are preliminarily removed by using the sedimentation tank, and then the part of the breeding wastewater is finely filtered by the screen and then discharged into the water purification tank. The biofilm culturing ceramsite layer in the water purifying tank can degrade and purify organic matters and harmful substances in the breeding wastewater in a biological metabolism manner, so as to realize biodegradation and purification treatment. A triple purification treatment system of precipitation, fine filtration and microbial metabolism is adopted, and compared with a traditional mode, the purification effect on the breeding wastewater can be greatly improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of aquaculture wastewater purification, and more particularly to an aquaculture wastewater purification device using ceramic pellets to fix microbial communities. BACKGROUND

[0002] Aquaculture wastewater is generated by livestock and poultry farms, including urine, feces, feed residues, flushing water, and wastewater generated during workers' daily life and production. These wastewaters are characterized by high suspended solids, high organic matter, and high nitrogen and phosphorus content, and have significant biodegradability.

[0003] In related technologies, microbial treatment technology is usually used to purify aquaculture wastewater. Microbial treatment technology has the advantages of significant deodorization and low-cost operation. Its principle is to use the metabolic activity of microorganisms to degrade organic matter and pollutants in aquaculture wastewater, thereby achieving rapid degradation of organic matter and other harmful substances.

[0004] However, due to the poor adhesion ability of microbial communities, they usually exist in a free suspended state after being released into aquaculture wastewater, which makes it difficult for microbial communities to grow stably in aquaculture wastewater. Once a large number of microorganisms are lost and die, the purification effect of aquaculture wastewater will be greatly affected. SUMMARY

[0005] To solve some or all of the technical problems existing in the prior art, the present application provides an aquaculture wastewater purification device using ceramic pellets to fix microbial communities.

[0006] To achieve the above purpose, the specific technical solutions of the present application are as follows: An aquaculture wastewater purification device using ceramic pellets to fix microbial communities, comprising: A sedimentation tank is provided with a conical hopper at the bottom, a first sewage pipe is provided on the side of the conical hopper and opened and closed by a valve, and four groups of supporting feet are symmetrically arranged at the bottom; A wastewater tank is arranged beside the sedimentation tank, a wastewater pipe is arranged at the upper part of the wastewater tank and communicates with the sedimentation tank, and a second sewage pipe with a stop valve is arranged at the bottom of the wastewater tank; A purified water tank is arranged beside the sedimentation tank in parallel with the wastewater tank, the bottom of the purified water tank is located below the bottom of the wastewater tank, the top of the purified water tank is flush with the top of the wastewater tank, the purified water tank and the wastewater tank communicate through a screen, and a ceramic pellet layer for facilitating the adhesion of microbial communities is arranged on the bottom plate of the purified water tank; A drainage groove is arranged inside the sedimentation tank and is surrounded by L-shaped side plates and the side plates of the sedimentation tank, the height of the L-shaped side plates is flush with the top of the side plates of the sedimentation tank, and the end of the drainage groove away from the clean water tank is provided with a drainage pipe, and the drainage groove is communicated with the outside through the drainage pipe. A pumping mechanism is arranged inside the clean water tank and is composed of an L-shaped pumping pipe and a sewage submersible pump, wherein the sewage submersible pump is arranged on the bottom plate of the clean water tank, the horizontal section of the L-shaped pumping pipe penetrates the side wall of the clean water tank and is communicated with the drainage groove, and the vertical section of the L-shaped pumping pipe vertically extends downward and is communicated with the sewage submersible pump.

[0007] Further, the aquaculture wastewater purification device using ceramsite to fix microbial community further comprises a stirring mechanism composed of a stirring shaft, stirring blades and a driving device, wherein the stirring shaft is vertically arranged at the center position of the clean water tank, the bottom of the stirring shaft is coaxially connected with the output shaft of the driving device fixed outside the clean water tank, the stirring blades are spirally arranged on the stirring shaft, and the lowest layer of the stirring blades of the stirring shaft is located above the ceramsite layer.

[0008] Further, in the aquaculture wastewater purification device using ceramsite to fix microbial community, a detachable screening grid is arranged in the sedimentation tank and is located at the center position in the height direction of the sedimentation tank.

[0009] Further, in the aquaculture wastewater purification device using ceramsite to fix microbial community, the ceramsite layer is formed by stacking ceramsites, and the surface of each ceramsite is modified by an amino silane coupling agent.

[0010] The aquaculture wastewater purification device using ceramsite to fix microbial community provided by the application has at least the following beneficial effects: In the aquaculture wastewater purification device using ceramsite to fix microbial community, the solid sediments in the aquaculture wastewater are preliminarily removed by using the sedimentation tank, and then the part of the aquaculture wastewater is discharged into the clean water tank after being finely filtered by the screen. The ceramsite layer with biofilm in the clean water tank degrades and purifies the organic matter and harmful substances in the aquaculture wastewater by biological metabolism, so as to realize biological degradation and purification treatment. The triple purification treatment system of sedimentation, fine filtration and microbial metabolism can greatly improve the purification effect of the aquaculture wastewater compared with the traditional method. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only used to further understand the present application and form a part of the present application. Based on the drawings, all other drawings obtained by those skilled in the art without creative effort can also fall within the scope of the present application. Figure 1 The structure schematic diagram of the aquaculture wastewater purification device using the ceramicite fixed microbial community of the present application; Figure 2 The top structure schematic diagram of the aquaculture wastewater purification device using the ceramicite fixed microbial community of the present application; Figure 1 The side sectional view of the aquaculture wastewater purification device using the ceramicite fixed microbial community of the present application; Figure 3 Figure 1 The front sectional view of the aquaculture wastewater purification device using the ceramicite fixed microbial community of the present application. Figure 4 The front sectional view of the aquaculture wastewater purification device using the ceramicite fixed microbial community of the present application. Figure 1

[0012] The legend of the drawings:100, sedimentation tank; 110, conical hopper; 111, first sewage pipe; 120, supporting leg; 130, screening grid; 200, wastewater tank; 210, wastewater pipe; 220, second sewage pipe; 300, purified water tank; 310, ceramicite layer; 400, screen; 500, drainage groove; 510, drainage pipe; 520, L-shaped side plate; 600, L-shaped pumping pipe; 700, sewage submersible pump; 800, stop valve; 900, stirring shaft; 910, stirring blade; 920, driving device. DETAILED DESCRIPTION In order to make the objects, technical solutions and advantages of the present application clearer, the following will clearly and completely describe the technical solutions of the present application with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort fall within the scope of the present application.

[0013] As

[0014] As Figures 1-4 ​As shown, the aquaculture wastewater purification device for fixing microbial community by using ceramsite provided by the embodiment of the application comprises a sedimentation tank 100, a wastewater tank 200, a purified water tank 300, a drainage groove 500 and a pumping mechanism, wherein the sedimentation tank 100 is a device for containing aquaculture wastewater and precipitating solid waste mixed in the device, which uses the natural precipitation or coagulation precipitation of water to make the suspended particles in the wastewater sink by gravity, thereby realizing solid-liquid separation. The bottom of the sedimentation tank 100 is provided with a conical hopper 110, the bottom size of which is smaller than the top size. In addition, the side surface of the conical hopper 110 is also provided with a first blowdown pipe 111 which is opened and closed by a valve, through which the solid waste precipitated in the sedimentation tank 100 can be discharged outward. In addition, four groups of supporting legs 120 are symmetrically arranged at the bottom of the conical hopper 110.

[0015] The wastewater tank 200 is a container device welded by multiple steel plates, which is arranged at the side of the sedimentation tank 100. The upper part of the side plate of the wastewater tank 200 is provided with a wastewater pipe 210 which is connected with the sedimentation tank 100. In actual use, the liquid surface of the wastewater in the sedimentation tank 100 is higher than the wastewater pipe 210, that is, the wastewater pipe 210 is immersed in the wastewater in the sedimentation tank 100, so that the supernatant of the wastewater in the sedimentation tank 100 can be discharged into the wastewater tank 200 through the wastewater pipe 210. Preferably, a valve is arranged at the wastewater pipe 210, so that the supernatant of the wastewater can be discharged into the wastewater tank 200 within a specified time period through the valve.

[0016] In the embodiment, the purified water tank 300 is also a container device welded by multiple steel plates, which is arranged at the side of the sedimentation tank 100 in parallel with the wastewater tank 200. The bottom of the purified water tank 300 is located below the bottom of the wastewater tank 200, and the top of the purified water tank 300 is flush with the top of the wastewater tank 200. The purified water tank 300 and the wastewater tank 200 are connected through a screen 400, and the bottom plate of the purified water tank 300 is provided with a ceramsite layer 310 for facilitating the adhesion of microbial community. Therefore, after the wastewater in the sedimentation tank 100 enters the wastewater tank 200 through the wastewater pipe 210, it flows into the purified water tank 300 through the screen 400, and the screen 400 filters the fine impurities in the wastewater and retains the fine impurities in the wastewater tank 200.

[0017] In order to prevent the screen 400 from being blocked, the screen 400 can be designed as a detachable connection structure, so as to be regularly disassembled and dredged.

[0018] The drainage groove 500 is arranged in the sedimentation tank 100, and the distal end of the drainage groove 500 away from the purified water tank 300 is provided with a drainage pipe 510, so that the drainage groove 500 is connected with the outside through the drainage pipe 510.

[0019] The pumping mechanism is arranged inside the water purification tank 300 and is composed of an L-shaped pumping pipe 600 and a sewage submersible pump 700. The sewage submersible pump 700 is arranged on the bottom plate of the water purification tank 300, and the first end, i.e., the horizontal section, of the L-shaped pumping pipe 600 penetrates through the side wall of the water purification tank 300 and is in communication with the drainage groove 500, and the second end, i.e., the vertical section, of the L-shaped pumping pipe 600 extends vertically downward and is in communication with the sewage submersible pump 700.

[0020] Therefore, under the pumping action of the sewage submersible pump 700, the wastewater in the water purification tank 300 that has been purified by the microbial community can be pumped by the L-shaped pumping pipe 600 to the drainage groove 500 and then discharged to the outside through the drainage pipe 510, so as to be collected directionally in the subsequent process.

[0021] The working principle and working process of the aquaculture wastewater purification device provided by the embodiment of the application will be described below.

[0022] Before purifying the aquaculture wastewater, a ceramic particle layer 310 with a predetermined thickness is fixedly laid on the bottom plate of the water purification tank 300. The ceramic particle layer 310 needs to be subjected to a microbial biofilm formation process for 48-72 hours before being put into use. Specifically, the domesticated compound microbial agent (for example, a mixture of nitrifying bacteria, denitrifying bacteria and bacillus) is mixed with wastewater at a certain ratio, and the mixed liquid is circulated through the ceramic particle layer 310 at a specified flow rate for 48-72 hours, so that a biological membrane with a predetermined thickness can be formed on the surface of the ceramic particle layer 310 after the biofilm formation is completed. The above-mentioned parameters such as the ratio, flow rate and duration can be determined according to the actual situation, and will not be described in detail herein.

[0023] Subsequently, the aquaculture wastewater is poured into the sedimentation tank 100 and is allowed to stand in the sedimentation tank 100 for a period of time, and the length of the standing time can be determined according to the actual situation. After the standing time ends, the supernatant of the aquaculture wastewater in the sedimentation tank 100 enters the wastewater tank 200 through the wastewater pipe 210, and the aquaculture wastewater entering the wastewater tank 200 will impact the screen 400 and flow into the water purification tank 300. In this process, small particulate impurities in the aquaculture wastewater are intercepted by the screen 400, and the wastewater entering the water purification tank 300 through the screen 400 will be degraded and purified by the ceramic particle layer 310 after biofilm formation.

[0024] The aquaculture wastewater flowing into the water purification tank 300 is allowed to stand for a period of time, and the organic matter and harmful substances in the aquaculture wastewater can be degraded and purified under the metabolic action of the microbial community. When the degradation and purification are completed, the sewage submersible pump 700 is started to pump the purified water into the drainage groove 500 through the L-shaped pumping pipe 600, and then the water is discharged to the outside through the drainage groove 500 and the drainage pipe 510 for directional collection, so as to achieve the purpose of purifying the aquaculture wastewater by the microbial community attached to the ceramic particles.

[0025] In addition, the solid waste precipitated in the sedimentation tank 100 can be discharged outward through the first blowdown pipe 111 on the side of the conical hopper 110 to achieve the purpose of directional collection.

[0026] In the aquaculture wastewater purification device provided by the embodiment of the present application, the solid precipitate in the aquaculture wastewater is preliminarily removed by using the sedimentation tank 100, and then the part of the aquaculture wastewater is discharged into the water purification tank 300 after being finely filtered by the screen 400. The biofilm ceramic layer 310 in the water purification tank 300 degrades and purifies the organic matter and harmful substances in the aquaculture wastewater by biological metabolism, so as to achieve biological degradation and purification treatment. Thus, the triple purification treatment system of precipitation, fine filtration and microbial metabolism can greatly improve the purification effect of aquaculture wastewater compared with the traditional method.

[0027] In some embodiments, the water purification tank 300 is also provided with a stirring mechanism, which includes a stirring shaft 900, stirring blades 910 and a driving device 920. The stirring shaft 900 is vertically arranged at the center position of the water purification tank 300, the bottom of the stirring shaft 900 is coaxially connected with the output shaft of the driving device 920 fixed outside the water purification tank 300, and the stirring blades 910 are spirally arranged on the stirring shaft 900. It goes without saying that, in order to avoid the stirring blades 910 affecting the ceramic layer 310, the lowermost stirring blades 910 of the stirring shaft 900 are located above the ceramic layer 310.

[0028] The wastewater can be stirred by the spirally arranged stirring blades 910 to break the stratification phenomenon of the water flow and promote the full contact between the microorganisms and the organic matter in the wastewater, thereby improving the metabolic efficiency of the microbial community. At the same time, the lowermost stirring blades 910 are located above the ceramic layer 310, which can not only avoid damaging the structure of the ceramic layer 310, but also enhance the mass transfer efficiency of the wastewater and the microbial community.

[0029] In some embodiments, the drainage groove 500 is surrounded by the L-shaped side plate 520 and the side plate of the sedimentation tank 100, which can prolong the flow path of the wastewater purified by the microbial community, so that part of the precipitate can continue to precipitate during the flow process, thereby improving the purification effect of the wastewater. At the same time, the height of the L-shaped side plate 520 is flush with the top of the side plate of the sedimentation tank 100, which can prevent the untreated wastewater in the sedimentation tank 100 from entering the drainage groove 500, thereby weakening the wastewater purification effect.

[0030] In some embodiments, a detachable screening grid 130 is arranged in the sedimentation tank 100 at a central position in the height direction of the sedimentation tank 100. The screening grid 130 can intercept the suspended matters with large volume in the aquaculture wastewater to avoid the blockage of the wastewater pipe 210.

[0031] In some embodiments, the wastewater tank 200 is provided with a second drain pipe 220 and a stop valve 800 connected to the second drain pipe 220 at the bottom of the wastewater tank 200. Thus, the impurities deposited in the wastewater tank 200 can be cleaned and collected periodically according to the actual needs.

[0032] In some embodiments, the ceramsite layer 310 is formed by stacking ceramsites, and the surfaces of the ceramsites are modified by amino silane coupling agent. The ceramsite layer 310 modified by the amino silane coupling agent can increase the roughness of the surface, thereby improving the adhesion rate of the microbial community. Meanwhile, the ceramsite layer 310 can also improve the anti-erosion ability, thereby reducing the shedding of the microbial membrane to some extent, so as to prolong the service life.

[0033] It should be noted that, in the present text, unless otherwise specified and limited, the term "connection" or its synonyms should be understood in a broad sense, for example, the "connection" can be a fixed connection or a detachable connection; can be a mechanical connection or an electrical connection; can be a direct connection or an indirect connection through an intermediate medium; can be an internal connection of two elements or an interaction relationship between two elements, and those skilled in the art can understand the specific meaning of the above-mentioned term in the present application according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. At the same time, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. In addition, "front", "back", "left", "right", "up", "down" and the like in the present text are referred to the placement state shown in the drawings.

[0034] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for purifying aquaculture wastewater by fixing a microbial community using ceramsite, characterized by, The application relates to a breeding wastewater purification device using ceramsite to fix microbial communities, which comprises the following parts: a sedimentation tank, the bottom of which is provided with a conical hopper, the side of the conical hopper is provided with a first sewage pipe which is opened and closed through a valve, and the bottom is symmetrically provided with four groups of supporting legs; a wastewater tank, which is arranged beside the sedimentation tank, the upper part of the wastewater tank is provided with a wastewater pipe which is communicated with the sedimentation tank, and the bottom of the wastewater tank is provided with a second sewage pipe with a stop valve; a clean water tank, which is arranged beside the sedimentation tank in parallel with the wastewater tank, the bottom of the clean water tank is located below the bottom of the wastewater tank, the top of the clean water tank is flush with the top of the wastewater tank, the clean water tank and the wastewater tank are communicated through a screen, and a ceramsite layer for facilitating the adhesion of microbial communities is arranged on the bottom plate of the clean water tank; a drainage groove, which is arranged in the sedimentation tank and is surrounded by an L-shaped side plate and the side plate of the sedimentation tank, the height of the L-shaped side plate is flush with the top of the side plate of the sedimentation tank, the distal end of the drainage groove away from the clean water tank is provided with a drainage pipe, and the drainage groove is communicated with the outside through the drainage pipe; a pumping mechanism, which is arranged in the clean water tank and is composed of an L-shaped pumping pipe and a sewage submersible pump, wherein the sewage submersible pump is arranged on the bottom plate of the clean water tank, the horizontal section of the L-shaped pumping pipe penetrates the side wall of the clean water tank and is communicated with the drainage groove, and the vertical section of the L-shaped pumping pipe vertically extends downwards and is communicated with the sewage submersible pump.

2. The aquaculture wastewater purification device using ceramsite to fix microbial community according to claim 1, characterized in that: The breeding wastewater purification device using ceramsite to fix microbial communities further comprises a stirring mechanism, which is composed of a stirring shaft, stirring blades and a driving device, wherein the stirring shaft is vertically arranged at the central position of the clean water tank, the bottom of the stirring shaft is coaxially connected with the output shaft of the driving device fixed outside the clean water tank, the stirring blades are spirally arranged on the stirring shaft, and the lowest layer of the stirring blades of the stirring shaft is located above the ceramsite layer.

3. The aquaculture wastewater purification device using ceramsite to fix microbial community according to claim 1, characterized in that: A detachable screening grid is arranged in the sedimentation tank and located at the central position in the height direction of the sedimentation tank.

4. The aquaculture wastewater purification device using ceramsite to fix microbial community according to claim 1, characterized in that: The ceramsite layer is formed by stacking ceramsites, and the surfaces of the ceramsites are modified by amino silane coupling agents.

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