Double-circulation seawater prawn comprehensive breeding system

Abstract

The invention relates to the technical field of seawater ecological breeding, in particular to a double-circulation seawater prawn comprehensive breeding system. The system comprises a prawn breedingpond, a sludge treatment tank, a first-stage surface flow constructed wetland, a second-stage composite vertical flow constructed wetland, a shellfish and alga biological filter and a reservoir, wherein the prawn breeding pond, the sludge treatment pond, the first-stage surface flow constructed wetland, the second-stage composite vertical flow constructed wetland and the reservoir are sequentiallycommunicated; the shellfish and alga biological filter is in parallel connection with the first-stage surface flow constructed wetland and the second-stage composite vertical flow constructed wetland, and is also in serial connection with the first-stage surface flow constructed wetland and the second-stage composite vertical flow constructed wetland; secondary deep treatment can be carried out when necessary, economical tidal flat crabs and tidal flat fishes are bred in the sludge treatment tank, and filter-feeding fishes, shellfishes and snails are bred in the first-stage surface flow constructed wetland. The system can effectively filter away residual bait, excrement and the like in prawn breeding discharged water, can purify nitrogen, phosphorus and other pollutants, has good ecological benefits, is low in overall energy consumption and saves energy.

Description

technical field [0001] The invention relates to the technical field of seawater ecological cultivation, in particular to a double-circulation seawater prawn comprehensive cultivation system. Background technique [0002] The main pollutants in my country's offshore and marine fishery waters are inorganic nitrogen and phosphate, among which nitrogen and phosphorus are regarded as one of the main factors that cause eutrophication of water bodies and even red tides and brown tides. The discharge of aquaculture drainage is relatively small compared with agricultural wastewater, urban sewage and industrial wastewater, but the direct discharge of aquaculture discharge water will also aggravate the deterioration of water quality in rivers, lakes and offshore waters. my country is the only country in the world where the amount of aquaculture is higher than the amount of catch. Since the 1980s, the scale of aquaculture has continued to expand, and the scale of seawater factory aquacu...

AI Technical Summary

Problems solved by technology

However, there are relatively few studies on the use of filter-feeding shellfish and macroalgae to construct biofilters for aquaculture effluent treatment.

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