Circulating type fish culture device

Abstract

The invention belongs to the technical field of aquaculture, and particularly relates to a circulating type fish culture device. According to the circulating type fish culture device, a fish tank unit for culturing fishes and a sedimentation tank unit for circularly purifying water in the fish tank unit are used for removing suspended matters and bacteria in the culture wastewater and finally recycling the culture wastewater, meanwhile, a rain unit with a double-layer structure is arranged, the suspended matters in the discharged wastewater are preliminarily mixed and pass through holes with adjustable sizes, and large-particle suspended matters in the wastewater are crushed into the small-particle suspended matters in the mixing process, so that the adsorption removal in the sedimentation tank in the next step is facilitated. The device has the advantages that aquaculture water resources can be recycled, the wastewater discharged into the environment is reduced, ecological balance of the surrounding environment can be maintained, meanwhile, the device is reasonable and effective in structural arrangement, suspended pollutants in aquaculture wastewater are pretreated, filtration or the adsorption removal is facilitated, and the risk of blocking a filter is reduced.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a circulating fish breeding device. Background technique [0002] Aquaculture refers to the cultivation of fish or various seafood in artificially opened fishing ponds on the shore. According to the different water quality of aquaculture, it can be divided into three categories: freshwater aquaculture, saltwater aquaculture and sea surface aquaculture. The common ones are milkfish , oyster, eel farming. The aquaculture industry is in a transition period from the traditional high-yield stocking model to large-scale farming and quality benefits. However, most aquaculture still adopts the method of large-scale introduction and large-scale rowing, which not only greatly consumes water resources, but also in the process of aquaculture. The polluted water formed by feed residues and fish, shrimp, and crab excrement polluted the water body and pond sediment, which made ...

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Problems solved by technology

[0004] However, in this invention patent, the disadvantage is that there is no pre-treatment process for the suspended pollutants in the aquaculture wastewater. The suspended particles are large and difficult to remove by filtration or adsorption. At the same time, there is a risk of blocking the filter when filtering.

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