Recirculating aquaculture technology, is recirculating aquaculture technology mature?

Recirculating aquaculture is a technical model that applies engineering technology, water treatment technology and high-density aquaculture technology to industrial fishery production.

With the development of aquaculture industry to the modern level, recirculating aquaculture technology as the supporting technology for the modernization of China's aquaculture industry, by scientific researchers and fishery production departments attach great importance to in-depth research in related aquaculture technology, water quality control, purification treatment, etc., and great progress has been made, some technologies have been applied in production. Among them, the treatment technology of aquaculture water, as one of the key technologies of factory aquaculture technology, has developed rapidly with the deepening of research, forming a number of technologies such as mechanical, chemical, biological and comprehensive treatment, which has laid the foundation for the further development of circulating aquaculture.

The treatment of recirculating aquaculture water mainly includes several aspects, namely, solid-liquid separation (separation of solids and suspended solids), biological filtration (reduction of BOD, ammonia nitrogen and nitrite) and storm gas (removal of carbon dioxide, etc.), disinfection, denitrification, oxygenation and other treatment processes, among which suspended solids and ammonia nitrogen removal are the main technical difficulties that need to be solved.

The field projects such as factory farms are summarized and summarized, providing necessary technical data for the design and management of factory farming, and it is expected that on this basis, further research on advanced technology and treatment methods, and the development of related efficient aquaculture engineering facilities and equipment. For example, the latest protein skimmer technology from Germany has been actively introduced, and after localization, higher efficiency technologies such as dual jet, ozone jet + UV catalytic ammonia nitrogen removal have been added.

From the perspective of a participant who has been engaged in recirculating aquaculture for more than 10 years, recirculating aquaculture is a major trend in the future of aquaculture, and there are still many technical and management difficulties. We need to make continuous efforts to improve.

If you want to rely on recycled water to get project funds, it's not fun to do it in the past few years! Without a solid mentality, it is difficult to succeed in recirculating aquaculture.

Recirculating aquaculture, first of all, you need a hobby, like this industry, only if you like it, can you continue to improve in technology and management! At the same time, it's not bad for money! You need to have the time, energy and physical strength to work!

The prospect is beautiful, the reality is skinny!

Someone did. <>

Very successful! There are also people who have failed very much!

1. The core technology of the circulating aquaculture system is the design and management of the biological filtration and purification unit, and the biological steam filtration is the water treatment unit with the largest investment and energy consumption in the closed circulation dismantling aquaculture system, and it is also the key to the stable operation of the system.

2. The core problems include the screening of carrier fillers, the structure and function of biofilms, and the nitrification dynamic call-up process of biofilters.

3. At present, in view of these core problems, there are few systematic studies at home and abroad, and there are few data and technologies for reference, especially in the marine aquaculture system, due to the influence of oligotrophic (COD is generally less than 20mg L), relative low temperature (water temperature is generally 15-28) and salinity in the water body, the hanging process of the biological filter is very long, and the phenomenon of N02- accumulation often occurs in the normal operation stage, resulting in the instability of the operation of the water treatment system, and also brings the uncertainty of production management.

Yes, the technology of high-density recirculating aquaculture is mature. It is an emerging aquaculture technology that can effectively improve the efficiency of aquaculture, reduce the cost of aquaculture, improve water quality, and reduce the impact on the environment. It adopts a hand-used circulating water system, which can effectively control the water temperature, dissolved oxygen amount, pH value and water quality to ensure the health and efficiency of aquaculture.

In addition, it can also effectively control aquaculture viruses to protect the health of aquatic products. Therefore, high-density recirculating aquaculture technology is indeed a mature aquaculture technology.

The significance of recirculating water fish farming.

In modern aquaculture production, recirculating water fish farming has become an advanced technical method. Compared with traditional fish farming, recirculating water fish farming can reduce the use of water resources, and its water quality is more stable, which can be continuously recycled. This not only reduces the cost of farming, but also ensures the healthy growth of the fish, thus increasing the efficiency of production.

Therefore, recirculating fish farming has been widely used in aquaculture production everywhere.

The basic principle of recirculating water fish farming.

The basic principle of circulating water fish farming is to establish a complete water circulation system, so that the water can be circulated in the system, and the water quality is treated and adjusted to maintain a certain stable state of water quality. The system is mainly composed of the following components:

Biological filter: It is used to treat harmful substances such as ammonia nitrogen and nitrite in water and convert them into harmless substances.

Mechanical filters: used to filter plankton, sediment, and other impurities from the water.

Oxygenation equipment: It is used to provide sufficient oxygen to the water.

Circulating Pump: Used to circulate water to various parts of the system.

Throughout the recycling process, the water is recycled after being treated in various parts, so that the use of water can be reduced.

Steps to set up a recirculating water fish farming system.

There are the following steps to establish a recirculating water fish farming system:

Choosing the right system: Determine the most suitable recirculating fish farming system according to the fish species to be farmed.

Design system: According to the actual situation of the farm, the system design is carried out. Including water circulation system, oxygenation equipment, circulation pump and membrane filtration equipment.

Construction of the system: Carry out system construction, such as building pools, installing equipment, etc.

Fry input: After the construction of the system is completed, fry are put into culture for farming.

Maintenance management: Regularly monitor and maintain water quality to maintain the stable operation of the system.

Through the above steps, the establishment of a circulating water fish farming system can achieve the goal of high efficiency, water saving, labor saving and energy saving.

Advantages of recirculating water fish farming.

The advantages of recirculating water fish farming mainly include the following aspects:

Reducing water use: Recirculating fish farming can effectively reduce water consumption and achieve the purpose of reducing water consumption.

Reduce costs: Recirculating water fish farming can reduce the cost of breeding and improve economic benefits.

Ensure water quality: Circulating water fish farming can ensure that the water quality is more stable, and the water quality will be treated many times during the recycling process, so as to continuously maintain high-quality water quality.

High breeding efficiency: circulating water fish farming can improve breeding efficiency, reduce the breeding cycle, and improve breeding efficiency.

Therefore, recirculating fish farming has become a development trend in modern aquaculture, which can bring many advantages and benefits.

Conclusion In conclusion, recirculating water fish farming is of great significance in aquaculture production, which can reduce water use, reduce aquaculture costs, ensure water quality and improve aquaculture efficiency. By paying attention to details in the construction of the system, regular water quality monitoring and maintenance, etc., the effect of circulating water fish farming can be better.

Build a cement fish pond: first choose ordinary household cement; Then mix cement, sand and gravel in a ratio of 1::3; The size of the gravel needs to be controlled between 5-20mm; Then build a cement pool and remove alkali.

Method of alkali removal: fill the cement pool with water and soak it for 1-2 weeks; Wash the walls of the pool with edible vinegar and soak it in water for a few days; Add 20g of acidic sodium phosphate to each ton of water, soak in the pool for 2 days and wash it with water.

1. Cement pond fish farming technology

1. Build cement fish ponds.

1) There are no special requirements for cement, ordinary household cement is sufficient.

2) Mix cement, sand and gravel in a ratio of 1::3. Conditional aquarists can add some waterproofing agent or expansion agent to the mixture, and aquarists without conditions can add some fly ash.

3) The gravel should not be too large, the size of the gravel should be controlled at 5-20mm, and the texture of the cement should not be too thin, otherwise it could not be fixed.

4) After the cement pool is built, it is necessary to remove the alkali.

2. The method of alkali removal.

1) The first method: fill the new cement pool with water, soak it for 1-2 weeks, and change the water every 2 days during the soaking stage.

2) The second method: wash the walls of the cement pool with edible vinegar, and then fill it with water and soak it for a few days.

3) The third method: add 20g of acidic sodium phosphate per ton of water and soak the cement pool for 2 days, and then rinse it with clean water.

3. Maintain cement fish ponds.

1) Adding well water or exposing the cement pool to the newly built cement pond can convert the calcium hydroxide in the capillary pores of the surface layer into insoluble calcium carbonate, which can maintain the cement fish pond well.

2) To maintain the cement fish pond, you can also add veneer materials to the outside of the cement to isolate the concrete from the water medium. In general, plastic veneer can be used, and aquarists can be tiled if possible.

3) Vibration and other methods can also be used to improve the compactness rate of concrete and reduce the probability of erosion of cement ponds with aquaculture water.

Second, how to do the automatic water circulation system of the fish pond

1. Before installing the water circulation system, you need to think about installing the circulating filter pump and aeration pump, otherwise it will lead to poor water quality, smelly and easy to grow moss.

2. The location of the nozzle of the water circulation system needs to be installed in a hidden and easily ignored place, and the installation position of the electricity refers to the position of the nozzle.

3. Generally, before pouring cement, the waiter should do a good job of overflow and sewage outlet, and the overflow is convenient for rainy days, if the rainwater exceeds the warning water level, it can be directly discharged to the rainwater well, not to the sewage well.

4. When installing the water circulation system, the position of the filter pump should be reserved.

5. The circulating filter pump is mainly composed of water inlet, water outlet, sewage outlet and other parts, and the power can be selected according to the size and water volume of the pool. When purchasing a circulating filter pump, the store will specify how much power you will need.

6. The installation method of the pump is relatively simple, and the pump is generally replaced once a year.