Diatom-prawn compound aquaculture system and process

Abstract

The invention relates to a diatom-prawn compound aquaculture system and process, and belongs to the technical field of prawn aquaculture. A diatom culture barrel discharges diatom water with the volume of 70-80% of the diatom culture barrel, wherein one part of the diatom water is discharged into a prawn aquaculture pool, the other part of the diatom water is discharged into a diatom biological fuel oil production system, after discharging, seawater containing diatom nutrient solution is added into the diatom culture barrel, a pH value of the water body of the diatom culture barrel is monitored in real time through a sensor, when the pH value exceeds 9, a control instrument automatically starts an electromagnetic valve to replenish carbon dioxide, and when the pH value drops to 7, the control instrument automatically turns off the electromagnetic valve. According to the diatom-prawn compound aquaculture system and process, the survival rate and yield of prawn aquaculture are improved,the survival rate can reach up to 90% or above, the yield can reach up to 5 kilograms per cubic meter, and the benefits are considerable; the production cost of an open type diatom culture system is only 60% of that of a sealed type culture system, and the benefits of prawn aquaculture can further offset the cost of diatom culture.

Description

technical field [0001] The invention relates to a diatom-prawn compound culture system and technology, belonging to the technical field of prawn culture. Background technique [0002] Phytoplankton are collectively referred to as microalgae, and microalgae occupy an important position in the shrimp culture system. It has the function of maintaining the ecological balance of the water body and stabilizing the culture environment. There is an antagonistic relationship between algae and bacteria. Algae can produce antibiotic substances that inhibit the growth of bacteria. During the growth process, algal cells continuously release many metabolites to the surroundings and thus form a bacterial community with unique structure and function. Diatoms are an important part of microalgae in the shrimp culture system, and can be used as natural live bait for shrimp seedlings. The microalgae community with diatoms as the dominant population can not only absorb harmful substances such as...

AI Technical Summary

Problems solved by technology

However, since the open microalgae culture environment is more susceptible to the influence of bacteria, the microalgae cultivation process is more complicated, and the use of unreasonable cultivation technology will lead to the failure of cultivation or the transformation of target algae into other types of microalgae

[0005] Although the industrial cultivation of algae in closed culture is a mature existing technology, and the industrial closed culture can ensure the high purity of algae species, but the cost of this kind of algae cultivation is very high, and it is difficult to apply it to shrimp farming.

[0006] In the open diatom culture, in the early stage of culture, diatoms can quickly become the dominant species due to their nutritional competitive advantages. However, as the culture process progresses, the dominant species gradually transforms from diatoms to green algae and cyanobacteria. Can secrete toxins, such as red tide dinoflagellates, cyanobacteria Microcystis, Anabaena, Oscillatoria, etc., and these microalgae generally lack protein, amino acids and other nutrients, or are large in size and low in nutritional value. Low, difficult to digest, easy to cause gastrointestinal diseases of prawns, and may bring harm to the healthy growth of prawns in a high-density prawn farming environment

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