Water body circulating purification biological filter bed for high-water-level prawn culture

Abstract

The invention discloses a water body circulating purification biological filter bed for high-water-level prawn culture. The water body circulating purification biological filter bed comprises a filter bed which is arranged at top of water body of a culturing pond and a water pumping pipeline which is arranged in the water body of the culturing pond. The top end of the water pumping pipeline penetrates the filter bed and is connected with a water distributing pipeline. The water distributing pipeline is arranged above the filter bed in a longitudinally and horizontally staggered manner. The bottom end of the water pumping pipeline is internally provided with an oxygenating aeration pipe. The oxygenating aeration pipe is connected with an aeration oxygenating device through an air pipe. Through the water pumping pipeline and the oxygenating aeration pipe, water body circulation of the culturing pond is realized in an air floatation water pumping manner. The water body which contains a deposit is pumped to the upper filter bed through the water pumping pipeline; and through filtering purification of the filter net, the water body flows back into the culturing pond, thereby realizing purification of the water body. Furthermore, sufficient mixing between upper-layer water body and lower-layer water body in the culturing pond can be realized, and furthermore the filter bed at the top of the water body of the culturing pond can perform a sunshielding function, thereby supplying a good inhabiting environment for the prawns and realizing benefits for growth.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a biological filter bed for circulation and purification of a water body for high-level culture of prawns. Background technique [0002] The high-level pond shrimp farming model has achieved the advantages of high yield, less disease, and high growth rate due to its characteristics of high density, intensification, and central sewage discharge, and has been popularized and applied on a large scale in the South China coast. [0003] However, due to its own characteristics, this kind of breeding mode also has deficiencies. Due to the high breeding density, single artificial feed feeding, relatively simple ecosystem, and too low environmental carrying capacity, it is very easy to cause toxic pollutants in the water. Accumulates rapidly, leading to deterioration of water quality. Especially in the middle and late stages of breeding, the accumulation and fermentation of a large a...

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Problems solved by technology

[0005] However, the discharge of a large amount of aquaculture wastewater not only increases the cost of aquaculture and aggravates environmental pollution, but also increases the probability of exogenous pathogen invasion by frequent water changes; the extensive use of drugs destroys the water ecosystem, and it is difficult to effectively remove it, which can easily lead to a vicious circle ; Circulating water filtration system is widely used due to high cost input

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