Purifying system for complefely closed sea water and fresh water fish cultivation

Abstract

The present invention belongs to the field of aquatic cultivation technology, and is one purified system for high density green cultivation of sea water and fresh water fish in a complexly closed circulation facility. The lone purified water system consists of cultivation pond, deposition pond, aerating pond and biologically purifying pond to constitute one complete circulation system. Each of the cultivation pond, deposition pond and biologically purifying pond is provided with blowdown pipeline to exhaust deposited solid dirt. The present invention has raised fish survival rate and growth speed.

Description

technical field

[0001] The invention relates to a purification system for fully enclosed sea and freshwater fish breeding and hoarding, which belongs to the aquaculture industry and is a high-density, green and pollution-free breeding method for sea and freshwater fish in closed circulating water facilities. Background technique

[0002] Closed circulation water fish farming technology has become a direction of fishery modernization because of its small footprint, high output and water saving. Domestic factory fish farming mostly uses filtration, sedimentation, aeration, and biological bag for nitrification and denitrification in circulating water treatment, which can cause the accumulation of nitrate for a long time. Although nitrate is not directly harmful to fish, it will Accumulation will affect the growth of fish, so a lot of water must be changed, which will not only pollute the environment, but also cause a waste of energy and water resources. Most of them use high-p...

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