Variable-flow relay type circulating water culture method for fishes

Abstract

The invention relates to a variable-flow relay type circulating water culture method for fishes in the technical field of aquaculture engineering. According to physiological metabolism rules of fishes, the circulation rate is reduced before feeding, the water circulation flow of a system is improved after feeding, discharge of solid particles such as residual feed excrement out of culture ponds isaccelerated, after most of solids are discharged, the circulation rate is returned to a normal level, the water quality is kept constant basically, and healthy growth of the fishes is guaranteed. Themethod contributes to fish ingestion and can strengthen the sewage discharge efficiency of the fishponds and guarantee culture water quality safety; through combination of different specifications ofculture ponds, different specification sizes of fishes can be cultured in a same culture system, the load borne by the culture system is kept in a nearly saturation state, and the operation energy efficiency of the culture system is improved; and through automatic control by various valves, liquid level sensors, variable frequency pumps and other equipment, the problem of damage of water balanceof the system due to circulation capacity change is solved, and the adjustable circulation capacity of the circulating water culture is realized.

Description

technical field [0001] The invention relates to the technical field of aquaculture engineering, in particular to a fish circulation aquaculture method. Background technique [0002] As a new type of high-efficiency industrialized and intensive aquaculture technology, industrialized recirculating aquaculture can achieve more than 95% of water recycling through the integration of water treatment technologies, which is water-saving, land-saving, healthy and efficient, and environment controllable It is an important direction to realize the transformation and upgrading of the aquaculture industry and green development, and it is also an important way to become a powerful fishery country. [0003] After nearly 40 years of development, domestic recirculating aquaculture has made great progress in terms of facilities and equipment, system models, and management experience, and has the ability to independently build aquaculture systems and normal production and operation. However, ...

AI Technical Summary

Problems solved by technology

The resulting problem is that the breeding system works in low load conditions for a long time, and the overall energy efficiency utilization rate is low

[0005] 2) The circulation volume of the system cannot be adjusted, which cannot meet the healthy growth requirements of fish of different sizes from small to large

On the one hand, such a flow rate is relatively high for juvenile fish. On the other hand, the feed is easily taken out of the breeding tank with the water flow and cannot be ingested by the fish, resulting in waste of feed and affecting the growth of fish.

If the circulation rate is reduced, it may have adverse effects on the sewage discharge and water treatment effect of the aquaculture pond

[0006] 3) The sewage in the breeding pond is not discharged in time, and the feces and residual bait affect the water quality

However, the resulting problem is that the water balance of the entire system will be disrupted due to the change of flow rate, or the water body will overflow, or the pool will be drained.

Images