Circulating water aquaculture system

Abstract

The invention discloses a circulating water aquaculture system and aims to realize recycle of aquaculture water and secondary utilization of solid particulate matters. The circulating water aquaculture system comprises a culture pond, a flocculation reactor, a biofilter, a sedimentation basin, a floccule collecting device and a blending pond and is characterized in that the culture pond is a narrow cone-shaped glass reinforced plastic culture pond, the center of the bottom of which is provided with a drain outlet; the sedimentation basin is a rectangular sedimentationbasin, an adjustable switching valve is arranged at the connection part of the sedimentation basin and the flocculation reactor, a sludge pump is arranged at the bottom of the sedimentation basin, and an oblique plate with aninclination angle of 60 DEG is arranged in the sedimentation basin; the flocculation reactor is a cone-shaped barrel and is respectively provided with a circle of micro aeration pipes at the bottom and in the middle, an outlet is arranged at the center of the bottom of the flocculation reactor, a water inlet is arranged at the bottom of the pond, a water outlet pipe is arranged on the wall of thepond, and the bottom height of the flocculation reactor is same as the middle height of the culture pond; the floccule collecting device is cone-shaped and is provided with an outlet at the bottom; and the blending pond is provided with a pH adjusting pump and temperature control equipment. The circulating water aquaculture system is used for circulating water aquaculture and can realize zero pollution discharge.

Description

technical field [0001] The invention relates to a recycling facility of aquaculture sewage and a secondary utilization facility of solid particles. Background technique [0002] Generally, in intensive aquaculture activities, 20-25% of the protein in the bait is converted into fish meat, and the rest exists in the aquaculture environment in the form of ammonia nitrogen, residual bait and feces. The residual bait and feces in the aquaculture water body are the main sources of ammonia nitrogen and nitrite nitrogen in the water body, and the degradation of solid particles will consume a large amount of oxygen. Therefore, for recirculating aquaculture systems, it is required to efficiently remove particulate matter from the system in the shortest possible time during system design. [0003] For ammonia nitrogen, residual bait and feces in the water body, one treatment method is to change the water. It is estimated that 1kg of prawns will consume 20m 3 Clean water source, the ...

AI Technical Summary

Problems solved by technology

But there are the following disadvantages: 1. It is easy to cause anoxic microorganisms to degrade organic matter and consume oxygen. Directly adding carbon source in the aquaculture water body will cause a sudden consumption of oxygen in the water body and affect the growth of the aquaculture object; The formation of biological flocs in the water body will increase the concentration of suspended particulate matter in the aquaculture water body and affect the growth of the aquaculture object

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