Combined shrimp culture system based on ectopic biofloc cultivation and in situ nitrification

Abstract

The invention discloses a composite shrimp culture system based on ectopic biological floc cultivation and in-situ nitrification. In the cultivation stage, biological floc technology is used to treat aquaculture tail water. In the middle and late stages of aquaculture, in-situ nitrification and denitrification are mainly used to remove nitrogen from aquaculture water, and at the same time, ectopic biological floc technology is used to remove sulfide generated during aquaculture. Hydrogen and other harmful substances can not only control the risk of dissolved oxygen in breeding, but also can use biological flocs to ectopic cultivation of zooplankton, feeding shrimps, improve feed utilization, and balance shrimp nutrition; According to the invention, the energy consumption for aeration is reduced by more than 30%, the utilization rate of bait can be increased by 10-15%, and the concentration of ammonia nitrogen and nitrite can be controlled within the safe concentration range during the whole breeding process, and the breeding risk is small, which is suitable for large-scale shrimp production.

Description

technical field [0001] The invention relates to a compound prawn culture system, specifically, a compound Penaeus vannamei culture system integrating the advantages of ectopic biological floc, zooplankton cultivation technology and in-situ nitrification, and belongs to the technical field of aquaculture . Background technique [0002] The biofloc culture technology of Penaeus vannamei is to keep the carbon-nitrogen ratio between 12-15 by continuously supplementing the organic carbon source in the culture water, so as to promote the growth of heterotrophic microorganisms in the culture system, and absorb the ammonia nitrogen and other metabolic wastes in the water to become bacteria. A new type of aquaculture technology based on body protein, which has the advantages of reducing feed consumption, reducing aquaculture sewage discharge, and improving the immune defense of prawns. However, most of the existing biofloc shrimp farming techniques are to cultivate biofloc in situ i...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides a composite prawn farming system that integrates the advantages of ectopic cultivation of biofloc and zooplankton and in-situ nitrification, and overcomes the large energy consumption of oxygenation in the middle and later stages of a single shrimp farming system, and the ammonia nitrogen and inferior nitrogen in the water body. Problems such as high nitrate concentration, low utilization rate of biofloc, easy death of prawns, etc.

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