A high-density cultivation process of prawns in indoor circulating water

Abstract

The invention provides an indoor circulating water high-density cultivation process for prawns, which includes a cultivation pond, a spin microfilter, an air screen type protein separator, a positive and negative biological processor, a bag collector, a sediment pond, and a bait fish pond Or tilapia culture ponds, sedimentation ponds, and ecological return ponds, the spin microfilter is connected to the culture pond through a water pump, and the bag collector is used to collect the solid waste of the spin microfilter, which is treated by the spin microfilter The final clean water flows to the air screen protein separator, and then flows to the forward and reverse biological processor, the forward and reverse biological processor is connected to the sedimentation tank, the spin microfiltration machine is connected to the sedimentation tank, the sedimentation tank is connected to the ecological return tank, and the bag type collection Both the tank and the sediment tank are connected to the bait fish pond or the tilapia culture pond. The invention has no waste of water source and waste of residues, so as to achieve maximum utilization, reduce environmental pollution, and reduce energy consumption.

Description

technical field [0001] The invention relates to a high-density cultivation process of prawns in indoor circulating water. Background technique [0002] As the success rate of shrimp farming in outer ponds is getting lower and lower, many farmers are gradually pursuing the indoor facility shrimp farming model. Due to the high price of shrimp, many farmers have also begun to pay attention to and increase investment in facilities. However, most of the huge aquaculture water treatment and the combination of water treatment and aquaculture technology are in a state of ignorance. At present, the indoor aquaculture process is mostly similar to the following process. 1. Build a steel structure workshop or shed, and use transparent tiles or transparent films for the roof. 2. Build aquaculture cement pools, either square or strip-shaped. The strip-shaped cement pools are separated in the middle, and the two sides push the water flow in positive and negative directions to form a runw...

AI Technical Summary

Problems solved by technology

Its breeding ponds and water treatment facilities all use cement ponds. As we know, the construction cost of reinforced concrete ponds is quite high, and its construction cost reaches 800 yuan per square water body.

If you try to save a little bit and build a pool with brick walls, the cost will be 500 yuan / square water body, but the facility is prone to water leakage during use, and once the crack leaks, it will be quite troublesome to maintain

For enterprises, if the investment in fixed assets is too large, the input-output return cycle is too long, the threshold is high, and it is not suitable for large-scale promotion. What's more, whether it is profitable after the investment of assets still depends on the grasp and support of other technologies

[0006] 2. The water treatment technology is not perfect, and it cannot meet the water treatment requirements when the organic load is high in the middle and late stages of breeding. On the surface, the process has solid-liquid separation, biological treatment, and ultraviolet disinfection, but the solid-liquid separation device used in practice It is difficult to achieve high separation efficiency at all, so the load in the biological treatment link is too high and it is easy to block

The facility-type heavy packing biological treatment process is inconvenient to backwash during regeneration or the cleaning energy consumption is high

Ultraviolet disinfection seems to have no side effects, but its efficiency is low, energy consumption is high, and it is inconvenient to quantify and use

[0007] 3. The water treatment process shows that not only the water head loss is large, but also the waste water is discharged without treatment, resulting in waste and environmental pollution

This water discharge also brings pollution and even soil salinization degeneration

[0008] 4. The aquaculture water in this water treatment process is difficult to be used repeatedly to raise shrimp after raising a batch of shrimp

This process only removes the residual bait and feces in the breeding process and is not complete. At the same time, the biological treatment facility removes part of the ammonia nitrogen and nitrite, but the phosphate and nitrate accumulated in the water body have not been reasonably removed. Of course, the phosphate Nitrate and nitrate will not be directly toxic to shrimp, but this substance will continue to accumulate in the water body, which will not be conducive to the survival and growth of shrimp to a certain extent

[0009] 5. The antagonistic microbial effect of Bacillus in the breeding process is not so strong for the balance of harmful microorganisms. There are too many suspended solids in the muddy water environment. Although it helps to prevent the stress of shrimp, its oxygen consumption is huge and excessively increased. Energy consumption and affect the oxygen demand of shrimp. At the same time, it is impossible to realize ultra-high-density farming of shrimp in a turbid environment. Microorganisms grow vigorously in an environment with high organic matter content, and at the same time, harmful microorganisms also increase sharply. Shrimp needs to be consumed during growth. More energy is used to resist the influence of adverse environment, so its growth rate is quite slow at high density

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