What Are the New Fish-Farming Technologies Abroad? A Full Analysis of Advanced Aquaculture Models
With the rapid development of modern science and technology and the aquaculture industry, the scale of industrial fish farming in various countries has been expanding day by day in recent years, and the results achieved by new farming technologies in increasing fish yields, reducing energy consumption and saving water resources have been remarkable.
Closed recirculating aquaculture technology designed for water conservation:
Water scarcity is a major problem facing the world today. Under these circumstances, developed countries have basically stopped developing flow-through fish farming, which consumes large amounts of water, and instead focus on developing closed recirculating aquaculture equipment to further improve water treatment technology so as to reduce daily water exchange. On the other hand, ship-type and offshore-platform-type flow-through fish farming equipment for mobile production at sea will also see a certain degree of development in Western and Northern European countries.
Pure oxygen aeration technology for increasing unit yield:
In recent years, some countries such as Denmark and Germany have successfully designed and built aquaculture equipment that uses liquid oxygen to add oxygen to fish ponds and biofilters, greatly increasing fish yields per unit of water surface. Countries such as the United States and Sweden have developed pressure-swing adsorption oxygen generation devices that can directly produce 85%-95% oxygen-enriched gas on fish farms, enabling farms far from cities to also adopt pure oxygen aeration technology. At present, scientists are vigorously researching the optimal method of pure oxygen aeration so that this technology can be rapidly popularized.
Water treatment technology for pollution control:
Wastewater treatment in freshwater fish farming is an important topic in the development of industrial fish farming technology. The biofilter pond designed by German scientists in the center of a fish pond has both a heat-preserving effect and can reduce energy consumption, has very high practical value, and has attracted the attention of various countries. This combined design of a fish pond together with a filter pond will see new developments. At the same time, developed countries with advanced industrial fish farming technology will also develop more new types of fish-farming wastewater treatment equipment that are smaller in size, lower in cost and stronger in wastewater treatment capacity, according to the characteristics of their respective water treatment technologies.
Low-cost heat pump temperature control technology:
Temperature control is an important part of industrial fish farming. When the daily water exchange rate is 8% to 10%, heating costs are a considerable figure. The heat pump is a new type of energy-saving temperature control device, and it can save about 50% of energy compared with conventional temperature control devices. Japan and the United States first used it in fish farming in the 1980s. As we enter the new century, heat pump manufacturing technology will become more and more advanced, and costs are gradually declining.
Increasingly advanced aquaculture monitoring technology:
At present, the more advanced industrial aquaculture equipment all uses computer-controlled sensor devices to collect and analyze data related to water quality, such as oxygen content, pH, water temperature, water level and flow, and is equipped with corresponding alarm and emergency systems. Some farms also use television cameras to scan the water surface to obtain information on the fish's feeding situation, or, based on relevant data, use computers to arrange the optimal feed amount in order to obtain the best conversion rate. In addition, rapid determination of important water quality data such as ammonia nitrogen content and nitrite content in water will also make breakthroughs, so as to monitor water quality more effectively and make industrial fish farming more reliable and stable.