Closed circulating seawater prawn pond culture system

Abstract

The invention relates to a prawn culture technique, in particular to a closed circulating seawater prawn pond culture system, which sequentially comprises a square or round culture pond, a round or square, corner-rounded vertical flow sedimentation pond, a comprehensive shellfish and algae treatment pond and a constructed mangrove wetland; the area of a single culture pond is 0.4 to 0.6 square meters, the culture pond consists of 2 to 3 prawn ponds, the pond depth is 2 to 2.2 meters, and the water depth is 1.6 to 1.8 meters; a circumferential inner wall (2) of the vertical flow sedimentation pond is inclined upwardly, the upper edge of the vertical flow sedimentation pond is provided with an annular water outlet channel (1) and a water outlet pipe (8), a mud-collecting pit (5) is arranged at the center of the bottom of the vertical flow sedimentation pond, and is connected to the outside of the pond through a mud discharge pipe (4), a central pipe (3) is arranged over the mud-collecting pit (5), and is supported and fixed by a support (6) at the center of the bottom of the vertical flow sedimentation pond, the lower part of the central pipe (3) is provided with a reflective plate (7), and a water inlet pipe (10) connected into the pond is extended into the lower part of the central pipe (3); the vertical flow sedimentation pond is 2.5 to 3 meters deep, and the water depth is 2 to 2.5 meters; the water depth of the comprehensive shellfish and algae treatment pond is 1.6 to 1.8 meters, and filter-feeding shellfish and algae are cultured in the pond by way of hanging; and the hydraulic power of the constructed mangrove wetland stays for 12 to 24 hours. In the culture system has the advantages that the polluting substances produced in the process of prawn culture can be fully and effectively removed, the structure is simple, the removing efficiency is high, the occupied floor area is small, energy can be saved, and emission can be reduced.

Description

technical field [0001] The invention belongs to the field of prawn cultivation, and in particular relates to a system configuration structure for cultivating prawns in a closed circulation seawater pond. Background technique [0002] In recent years, the intensive shrimp aquaculture industry along the South China coast has developed rapidly, and the pond aquaculture area has remained at a relatively high level. A large number of pollutants will be produced during the shrimp farming process, such as suspended particles, aquatic planktonic animals and plants, and dissolved nutrients such as nitrogen and phosphorus, as well as complex organic substances such as various refractory antibiotics and Chinese herbal medicines used in the shrimp farming process. Residues of heavy metal disinfectants, etc. Due to the current traditional farming model, the shrimp farming wastewater is almost directly discharged into the surrounding sea area without treatment, greatly exceeding the self...

AI Technical Summary

Problems solved by technology

[0004] The existing polyculture mode, where two or more kinds of organisms are mixed in the same water body, will bring direct competition for the living space and dissolved oxygen of the cultured organisms; shellfish and fish excrement will also increase the amount of water in the water The concentration of ammonia nitrogen and suspended solids, etc., and the difficulty of preventing various diseases; the mixing of various organisms in the pond will cause inconvenience when the organisms are harvested; when the polyculture model changes the water in the shrimp pond, there will still be problems. A large amount of pollutants deposited at the bottom of the pool are discharged, but cannot be effectively treated, and the discharged wastewater still brings some pollution to the environment

Shrimp adopts the monoculture mode, and the discharged wastewater is treated outside the pond. Only sedimentation treatment is used, which cannot remove suspended solids, microalgae, dissolved nitrogen and phosphorus and other substances in the wastewater that are difficult to settle and exist. The sedimentation pond covers an area of Large size, low efficiency and other problems; if the shrimp-fish-shellfish-algae culture mode is adopted to separate the shellfish and algae, the area occupied by the treatment area will be too large, resulting in a small area of ​​the shrimp culture area with high economic benefits, and then Affect the economic benefits of farming

In addition, the above farming model cannot remove various refractory antibiotics, Chinese herbal medicine and other complex organic matter and residues of heavy metal disinfectants remaining in the water

[0005] The existing prawn farming model has the following difficulties to be solved: the use of polyculture mode leads to management difficulties in the prawn farming process, and it is impossible to avoid the problem that high-concentration pollutants contained in the discharged wastewater cannot be removed when the shrimp pond is changed or the shrimp is harvested

The sedimentation pond has a simple structure, low removal efficiency of suspended solids in water, and large floor area.

Shrimp Pond Wastewater Treatment Combined Facilities occupy a large area and have low treatment efficiency

Nutrients such as nitrogen and phosphorus contained in the discharged wastewater and the problem that the water itself cannot be used as a resource

Various refractory antibiotics, Chinese herbal medicines and other complex organic matter and residues of heavy metal disinfectants used in the shrimp farming process in the discharged wastewater cannot be effectively removed

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