Self-cleaning fluidized bed biofiltration device for aquaculture

Abstract

The invention discloses a self-cleaning fluidized bed biofiltration device for aquaculture. The self-cleaning fluidized bed biofiltration device comprises a barrel, wherein the barrel is internally provided with a bed expansion region and a suspended matter sedimentation region; the bed expansion region is filled with a filter material; a self-cleaning assembly and an automatic detecting assembly are arranged above the bed expansion region; the self-cleaning assembly is used for cleaning suspended matters on the surface of the filter material, and the cleaned filter material enters the bed expansion region again; and the automatic detecting assembly is used for controlling the self-cleaning assembly. The suspended matter sedimentation region is located above the self-cleaning assembly, and the suspended matters separated from the self-cleaning assembly reach the suspended matter sedimentation region after passing through the bed expansion region and are discharged after being settled.

Description

technical field [0001] The invention relates to the field of mariculture, in particular to a self-cleaning fluidized bed biological filter device for mariculture. Background technique [0002] With the rapid development of modern agriculture, the marine fish farming industry such as flounder and flounder is gradually growing. Due to the limitation of region, water source and temperature, the industry has not formed an industrial scale. Due to its advantages of high efficiency, controllability, saving water and land, and not being restricted by the geographical environment, the recirculating aquaculture model is gradually being promoted and applied in the aquaculture industry around the world, and it is the main direction for the sustainable development of the aquaculture industry in the future one. In the circulating aquaculture system, the biological filter is the core water treatment unit. The microorganisms on the surface of the filler in the filter are used to degrade n...

AI Technical Summary

Problems solved by technology

[0005] 1. At present, the traditional fluidized bed biological filter is easy to form a dead angle area during operation, resulting in uneven flow state, reducing the mass transfer effect of the matrix and filler in the water, and thus affecting the efficiency of water treatment of the device

[0006] 2. Since there is no self-cleaning device during the operation of the traditional fluidized bed biological filter, more and more suspended solids are easy to adhere to the surface filter material, so the weight of the filter material becomes lighter, and the expansion height of the bed layer becomes higher and higher. Lead to the loss of filter material, which affects the treatment efficiency of the device

[0007] 3. The specific surface area of ​​the filler in the traditional biological filter is generally not high, and the surface of the filler per unit volume cannot attach rich biological communities, which in turn affects the water treatment effect of the device

[0008] 4. Traditional biofilters often use the natural film-hanging method to start the filter. This method has problems such as long start-up time and difficulty in inoculation, resulting in problems such as low filter processing efficiency and unstable operation effect, which in turn affects the operation of the recirculating aquaculture system. s efficiency

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