Biological filter for aquacultural sand bed

Abstract

The invention provides a biological filter for an aquacultural sand bed. The biological filter comprises a filter container and a spray pipe. The surface and bottom of the filter container are both provided with a plurality of through holes. A second filter net wraps the outer surface of the filter container. A first filter net containing filter material is arranged in the filter container. The spray pipe is inserted into the first filter net. The bottom end of the spray pipe is immersed at the bottom of the first filter net. A portion of the spray pipe, inserted into the filter material, is provided with a plurality of water inlets. The bottom end of the spray pipe is closed. A duckbilled water outlet inclining to one side is arranged at the upper end of the spray pipe. The ends of the first filter net and the second filter net are both fixed to the spray pipe. An air inlet pipe is arranged on a portion of the spray pipe, which extends out of the filter container. The biological filter has the advantages that the biological filter is disposed in a culture pond, pollutant in the culture pond contacts with beneficial microbial films on the biological filter to achieve purification, stability in water quality is guaranteed, frequent water change is not needed, cost is saved, and survival rate of cultured aquatics is increased by 20%.

Description

technical field [0001] The invention relates to a device for treating water quality in an aquaculture environment or aquarium products, in particular to a sand bed biological filter device for aquaculture. Background technique [0002] Recirculating aquaculture is a way of water treatment to control the water quality of the water body, so that biological production can proceed smoothly, and at the same time greatly reduce the lack of frequent water changes in flowing water or water-stop aquaculture, especially the indoor recirculating aquaculture system, hope It can eliminate the pollution of fresh water from outside and solve the infection and spread of pathogens. In addition, recirculating aquaculture has the following requirements: [0003] 1. Maintain stable water quality so that the cultured organisms can adapt well; [0004] 2. Improve the survival rate and growth rate of aquatic organisms, reduce the cost of breeding, and increase the income of breeding; [0005] 3....

AI Technical Summary

Problems solved by technology

[0009] In the aquaculture and aquarium industry, due to the accumulation of excrement of cultured animals and the corruption of excessive feeding food, the water quality in the breeding pond or aquarium will continue to deteriorate, the dissolved oxygen will decrease, and nitrous acid will be produced, which will affect the breeding. For the healthy growth of animals, in order to maintain the health of the water quality in the aquaculture environment, the traditional method is to change the water. However, since the volu

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