Immersed multilayer aquaculture system and water circulation method

Abstract

The invention provides an immersed multilayer aquaculture system and a water circulation method. The immersed multilayer aquaculture system comprises a culture pond body, a plurality of fish-water separating devices, and a sewage treatment system, wherein the inner cavity of the culture pond body is divided into a water inlet buffer region, a three-dimensional culture region and a water drainage buffer region in the length direction of the culture pond body, a plurality of region dividing partition boards in up-down array are arranged in the three-dimensional culture region, and a culture channel which is penetrated in a straight line is formed in a space between every two adjacent region dividing partition boards; the fish-water separating devices communicate with a sewage diversion channel; and the sewage treatment system is in circulating communication with the water drainage buffer region, the fish-water separating devices and the water inlet buffer region. According to the immersed multilayer aquaculture system disclosed by the invention, the number of bred fish can be increased, the floor space of aquaculture is saved, and besides, construction difficulty and construction cost are low.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a submerged multi-layer aquaculture system and a water circulation method. Background technique [0002] Closed recirculating aquaculture system (RAS for short) is a commonly used term in the aquaculture industry, including aquaculture containers and water treatment areas, and the recirculation efficiency of the aquaculture water body is high. Typically, less than 1 cubic meter of fresh water is used per kilogram of fish produced in a RAS system, and even less water is used in most plants, down to about 50 liters per kilogram. More than 99% of the purified water in the water treatment area can be recycled and reused. In contrast, flow-through aquaculture systems use more than 50 cubic meters of fresh water per kilogram of fish produced. [0003] After the aquaculture sewage is discharged from the aquaculture pond, it needs to go through a series of water treatment and clean...

AI Technical Summary

Problems solved by technology

The current aquaculture system, regardless of the depth of the pond, is a single-layer aquaculture pond. For a plant with expensive construction costs per unit area, building a certain volume of aquaculture pond in it often requires a larger land area, land and plant construction. higher cost

Especially for some benthic and aggregate fishes, such as flounder, flounder, grouper, etc., they cannot be evenly distributed in the three-dimensional water space, so they cannot be cultured in deep ponds, and the construction of shallow ponds occupies a large area of ​​land , and the space above the pool body cannot be used, resulting in a large waste of space

[0020] The third is that the construction time is longer

However, this type of aquaculture pond still has obvious shortcomings. Due to the particularity of aquaculture, the pond body needs to be filled with water, resulting in a large weight of the culture container. For the three-dimensional multi-layer aquaculture pond, the load-bearing capacity of its multi-layer frame Extremely high requirements on the material and structure of the frame, high maintenance costs, and because the layers are independent, the bottom plate of each layer of the culture pond is only in contact with the air, and the load-bearing requirements per unit area are also extremely high. As a result, it is not suitable to build a deep pool in this mode, which limits the species of culture. In order to ensure smooth water intake and drainage of each floor, the water supply and drainage pipes need to be installed independently on each floor, so the construction complexity and maintenance cost are high.

Images