First, the main technical links The semi-enclosed circulating water ecological fish culture system mainly consists of five major components. Its structure and functions are as follows: 1. Fish pond: Converted from an ordinary fish pond with an area of ​​700 m2 to 1500 m2 to an oval shape with an area of ​​80 m2 to 120 m2, a small concrete pool with water up and down and automatic sewage discharge function, increasing the pool volume and containing fish The amount of water pollution from fish excrement is reduced. 2. Oxygenation facilities: The oxygenation of the dispersing aerators was changed to the blower centralized aeration and oxygenation, which not only increased the oxygen content of the pool water, but also saved energy and was easy to operate and maintain. 3. Water Purification System: Developed bio-pack and dirt filter. Wastewater treated with integrated physical, chemical, and biological technologies has achieved ammonia and organic removal rates of 80% and 75%, respectively, reaching the standard for circulating fish farming water. 4. Disinfection and disease prevention facilities: An ozone generator is installed at the inlet end of the Sheung Shui water mains, and the sterilization rate reaches 80%-90%, which reduces the occurrence of fish disease and the dosage of fish and avoids the use of antibiotics for sterilization. Pollution caused by fish. 5. Water temperature regulation: There are 3 hot water wells, and the outlet water temperature is 40°C-90°C. Both the fish pond and the water purification pool are provided with hot and cold water supply pipes. The temperature of the pool water is adjusted by entering and leaving the water. In the winter, plastic sheds are buckled on the fish ponds and solar energy is used. , Warming and warming. In addition, there are feed processing plants and laboratories supporting the system. Feed processing plants are prepared according to the nutritional needs of different growth and development stages of fish and supply high-quality, high-efficiency pellet feeds. The laboratory is equipped with microscopes, clean benches, and water quality. Laboratory equipment and other equipment for fish disease monitoring, control, water quality monitoring, feed analysis. Second, the production results The system has been running through a production cycle and has achieved the expected results: Effective control of harmful indicators such as dissolved oxygen, pH, water temperature, ammonia nitrogen, nitrite, and organic matter provides a suitable ecological environment for fish, with a yield of 3 kg. / Cubic meter -4kg/cubic meter increased to 50kg/cubic meter; Feed coefficient adult fish 1.8-2.0, fish fry 1.3-1.5, the product has reached the standard of pollution-free food; After the treatment of fishery sewage turned waste into treasure, recycling, For every 1kg of water produced, 31.4 cubic meters of water is saved, the water saving effect ranks the leading domestic level, and the environmental pollution of fishery sewage is basically eliminated. Third, there are problems Although the semi-enclosed circulating water ecological fish culture system provides experience for environmental fish farming, there are still some problems due to lack of time, experience, and funds. 1. Because of the genetic instability of tilapia, strain selection must be conducted. 2, the system is not complete, such as automated feeding, computer information and regulation, cultivation of beneficial bacteria and other subsystems to be configured. 3. The sedimentation tank and the water purification tank need to be increased and expanded. 4. There are few famous, excellent and special breeds suitable for high-density ecological farming of recycled water. 5. The equipment is developed by oneself and has not yet reached the best operating condition. It needs to pass trial and error, summary, improvement and promotion. MAGIK Lift Series are made of PDO (Polydioxanone), it is a thread with no cones, thus no damage to the tissue. This is the same thread used in Cardiac and other surgeries as sutures, and thus it is very safe. PDO Thread Mono,Face Lift PDO Thread Mono,Mono Face Lifting Thread PDO,PDO Thread Lifting Dermax Technology Limited , https://www.dermaxmed.com
"Semi-enclosed circulating water ecological fish culture system" is the application of biotechnology to purify the fish water quality, the application of pollution-free probiotics to prevent fish diseases, so that the cultured tilapia has no drug residues and food safe fish farming technology.