CN215102690U - A biological aerated filter for freshwater aquaculture wastewater - Google Patents
A biological aerated filter for freshwater aquaculture wastewater Download PDFInfo
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- CN215102690U CN215102690U CN202120720436.3U CN202120720436U CN215102690U CN 215102690 U CN215102690 U CN 215102690U CN 202120720436 U CN202120720436 U CN 202120720436U CN 215102690 U CN215102690 U CN 215102690U
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Abstract
The utility model discloses an aeration biological filter for freshwater aquaculture wastewater, which comprises a water inlet tank, a filter body and a water outlet tank; the water inlet tank is connected with the top of the filter body through a water inlet pipe, and the water outlet tank is connected with the bottom of the filter body through a water outlet pipe; the filter tank body is internally provided with a zeolite layer, a mixed packing layer and a pebble layer from top to bottom in sequence, and the layers are separated by a grid. The top of the filter body is provided with a water distribution pipe which is connected with a water inlet pipe; the peristaltic pump is arranged on the water inlet pipe, wastewater in the water inlet tank is conveyed into the water distribution pipe at the top of the filter body through the peristaltic pump, and then uniformly falls into the filter body through the water distribution pipe, and is collected in the water outlet tank through the water outlet pipe after being filtered by each layer of filling materials filled from top to bottom in sequence. An aeration disc is arranged on the grid above the pebble layer, the aeration disc is connected with an external air pump through a pipeline, and an air flow meter is further arranged on the pipeline.
Description
Technical Field
The utility model relates to a freshwater aquaculture wastewater treatment technical field especially relates to a freshwater aquaculture is biological aerated filter for waste water.
Background
The aquaculture industry of China is developed rapidly, the culture scale is enlarged day by day, and the intensification degree is obviously improved. In 2019, the aquaculture area of the whole country is 7108.50 kilo hectares, wherein the freshwater aquaculture area is 5116.32 kilo hectares, and accounts for 72 percent. The rapid development of the freshwater aquaculture industry brings good economic benefits and also brings the problems of wastewater discharge, deterioration of ecological environment and the like. Therefore, the research on the standard treatment of the freshwater aquaculture discharge wastewater is urgently needed, and the sustainable development of the freshwater aquaculture industry is ensured.
The Biological Aerated Filter (BAF) is mainly characterized in that two processes of biological oxidation and solid-liquid separation are combined into one, the BAF is used as a sewage biochemical treatment unit, a subsequent sedimentation tank is not needed, the process is simpler, and the space is more compact. But the denitrification efficiency is influenced by various conditions and is unstable, and the dephosphorization effect is worse.
In order to realize the purpose of nitrogen and phosphorus removal of the freshwater aquaculture wastewater by the BAF system, the selection of the filler plays an important role in maintaining a large amount of active biomass and various microorganism populations.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a biological aerated filter for freshwater aquaculture wastewater, which aims at overcoming the defects of the prior art.
The utility model adopts the following technical scheme:
an aeration biological filter for freshwater aquaculture wastewater, which comprises a water inlet tank, a filter body and a water outlet tank; the water inlet tank is connected with the top of the filter body through a water inlet pipe, and the water outlet tank is connected with the bottom of the filter body through a water outlet pipe;
the filter tank body is internally provided with a zeolite layer, a mixed packing layer and a pebble layer from top to bottom in sequence, and the layers are separated by a grid.
Furthermore, a water distribution pipe is arranged at the top of the filter body and is connected with a water inlet pipe; the water inlet pipe is provided with a peristaltic pump, wastewater in the water inlet tank is conveyed into the water distribution pipe at the top of the filter body through the peristaltic pump, and then uniformly falls into the filter body through the water distribution pipe, and is collected in the water outlet tank through the water outlet pipe after being filtered by the filling materials of each layer filled from top to bottom in sequence.
Further, an aeration disc is arranged on the grid above the pebble layer and connected with an external air pump through a pipeline, and an air flow meter is further arranged on the pipeline.
Furthermore, the water outlet tank is communicated with the bottom of the filter body through a backwashing pipe, and a backwashing pump is arranged on the backwashing pipe.
Preferably, the laying height ratio of the zeolite layer, the mixed filler layer and the pebble layer is 1: 1.
Preferably, the mixed packing layer is formed by mixing sponge iron and manganese sand according to the mass ratio of 2-4: 1.
The zeolite is used as a matrix filler of an aerobic section to strengthen the nitrification effect by utilizing the characteristic that the zeolite has high ammonia nitrogen adsorption capacity; the sponge iron filler has certain promotion effect on nitrification and can improve the phosphorus removal effect, and the manganese sand can soften the sponge iron to improve the treatment efficiency and achieve the aim of simultaneously removing nitrogen and phosphorus.
Has the advantages that:
the aeration biological filter for freshwater aquaculture wastewater adopts a mode of water inlet from top to bottom and uniform water distribution, and the aeration disc is arranged at the lower part of the mixed packing layer, so that air is in reverse contact with sewage, the treated sewage can be effectively in contact with the packing, and the treatment effect is enhanced; the arrangement of the backwashing pipe can effectively wash and replace the inactivated biological membrane, thereby enhancing the organic matter removal effect; and the arrangement of the multiple layers of filter materials realizes that the growth of each layer is different but the biological flora of the filter material of the layer is adapted, is beneficial to the proliferation and metabolism of microorganisms, and can effectively realize the purposes of denitrification and dephosphorization.
Drawings
These and/or other advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings and the following detailed description.
FIG. 1 is a schematic structural view of the biological aerated filter for freshwater aquaculture wastewater.
Wherein each reference numeral represents:
1. a water inlet tank; 2. a peristaltic pump; 3. a water inlet pipe; 4. a water distribution pipe; 5. a zeolite layer; 6. a grid; 7. a mixed packing layer; 8. a pebble layer; 9. a water outlet pipe; 10. a water outlet tank; 11. a backwash pump; 12. a backwash pipe; 13. an air pump; 14. an air flow meter; 15 aeration disc.
Detailed Description
The invention will be better understood from the following examples.
The drawings in the specification show the structure, ratio, size, etc. only for the purpose of matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and not for the purpose of limiting the present invention, so the present invention does not have the essential meaning in the art, and any structure modification, ratio relationship change or size adjustment should still fall within the scope covered by the technical content disclosed in the present invention without affecting the function and achievable purpose of the present invention. Meanwhile, the terms "upper", "lower", "front", "rear", "middle", and the like used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.
As shown in figure 1, the biological aerated filter for freshwater aquaculture wastewater comprises a water inlet tank 1, a filter body and a water outlet tank 10; the water inlet tank 1 is connected with the top of the filter body through a water inlet pipe 3, and the water outlet tank 10 is connected with the bottom of the filter body through a water outlet pipe 10. The filter body is internally provided with a zeolite layer 5, a mixed packing layer 7 and a pebble layer 8 from top to bottom in sequence, and the layers are separated by a grid 6.
Wherein, the top of the filter body is provided with a water distribution pipe 4, and the water distribution pipe 4 is connected with a water inlet pipe 3; the water distribution pipe 4 is composed of PVC pipes
The distance between the pipes is 80mm, and the water distribution pipe is provided with water distribution holes
The hole spacing is 7mm to ensure that the water inlet and the water distribution are uniform. The peristaltic pump 2 is arranged on the water inlet pipe 3, wastewater in the water inlet tank 1 is conveyed into the water distribution pipe 4 at the top of the filter body through the peristaltic pump 2, uniformly falls into the filter body through the water distribution pipe 4, is filtered by the layers of fillers filled from top to bottom in sequence, and is collected in the water outlet tank 10 through the water outlet pipe 10.
An aeration disc 15 is arranged on the grid 6 above the pebble layer 8, the aeration disc 15 is connected with an external air pump 13 through a pipeline, and an air flow meter 14 is further arranged on the pipeline and can provide oxygen for the zeolite layer 5 and the mixed packing layer 7 to form an aerobic zone, so that the nitrification and aerobic phosphorus removal are simultaneously carried out, and the synchronous nitrogen and phosphorus removal of the aquaculture wastewater is realized.
The water outlet tank 10 is communicated with the bottom of the filter body through a back washing pipe 12, and a back washing pump 11 is arranged on the back washing pipe 12.
The zeolite layer 5 is composed of zeolite with the particle size of 8-10 mm, and the laying height is 150 mm; the mixed packing layer 7 is formed by mixing sponge iron and manganese sand according to the mass ratio of 3:1, and the laying height is 300 mm; the pebble layer 8 is composed of pebbles with the particle size of 50-80 mm, and the laying height is 150 mm.
The size of the whole filter body is 800mm in length, 600mm in width and 700mm in height.
The specific process for treating the wastewater by adopting the aeration biological filter for the freshwater aquaculture wastewater comprises the following steps:
(1) water distribution: freshwater aquaculture wastewater is uniformly distributed into the filter tank through the water distribution pipe;
(2) wastewater treatment: sewage seeps downwards, fully contacts with the filler in the filter tank and has physical, chemical and biological effects, and organic substances, nitrogen, phosphorus and other substances in the sewage are adsorbed by the filler and are further degraded and converted;
(3) the treated culture wastewater is infiltrated and collected in the pebble bed and finally discharged by a water outlet pipe.
The test is carried out by dissolving 80g glucose, 19.1g ammonium chloride and 3.5g potassium dihydrogen phosphate in 1000L water, wherein N, P, C (COD) and hydraulic load are 80mg/L, and 0.4m3·m-2·d-1Water was continuously fed every day, and after about 20 days, the effluent pH tended to stabilize (6.8-7.5), NH4 +The N removal rate is about 85 percent, the COD removal rate is about 80 percent, and the start-up of the device is finished.
The aeration biological filter tank controls the hydraulic load to be 0.4m3·m-2·d-1And artificially simulating the water quality of freshwater aquaculture wastewater: COD60mg/L, NH4 +-N 5mg/L，NO3 -N1.5mg/L, TN 7.2mg/L, TP 2mg/L, the effluent quality is stably maintained at COD5mg/L (removal rate 90%), NH4 +-N0.7mg/L (85% removal) of NO3 -N0.4mg/L (removal rate of 75%), TN1.5mg/L (removal rate of 80%), and TP 0.2mg/L (removal rate of 90%), and basically no nitrite nitrogen exists in effluent under the condition of continuous aeration. The device can continuously operate, and the effluent quality is stable.
The utility model provides a thinking and a method of freshwater aquaculture waste water with bological aerated filter, the method and the way that specifically realize this technical scheme are many, above only the preferred embodiment of the utility model discloses, it should point out, to the ordinary technical personnel in this technical field, under the prerequisite that does not deviate from the utility model discloses the principle, can also make a plurality of improvements and moist decorations, these improvements should also regard as with moist decorations the utility model discloses a protection scope. All the components not specified in the present embodiment can be realized by the prior art.
Claims (5)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120720436.3U CN215102690U (en) | 2021-04-09 | 2021-04-09 | A biological aerated filter for freshwater aquaculture wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120720436.3U CN215102690U (en) | 2021-04-09 | 2021-04-09 | A biological aerated filter for freshwater aquaculture wastewater |
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| CN215102690U true CN215102690U (en) | 2021-12-10 |
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| CN202120720436.3U Active CN215102690U (en) | 2021-04-09 | 2021-04-09 | A biological aerated filter for freshwater aquaculture wastewater |
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2021
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An aerated biofilter for freshwater aquaculture wastewater Granted publication date: 20211210 Pledgee: Nanjing Bank Co.,Ltd. Nanjing North Branch Pledgor: Nanjing yuanchuangjing Environmental Protection Technology Co.,Ltd. Registration number: Y2024980013527 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20211210 Pledgee: Nanjing Bank Co.,Ltd. Nanjing North Branch Pledgor: Nanjing yuanchuangjing Environmental Protection Technology Co.,Ltd. Registration number: Y2024980013527 |