It uses gravity sedimentation to separate high-density suspended particles from natural water. Natural water sources contain many tiny suspended substances; In the circulating water system, the residual bait and excrement are suspended or dissolved in the aquaculture water. It can be removed by filtration.
(2), filter ①, physical filter ②, biological filter (3) and disinfection device
The filtered water of fish farming system also contains pathogenic microorganisms such as bacteria and viruses, which need to be disinfected. At present, the commonly used disinfection devices are ultraviolet sterilizer and ozone generator. 3. Configuration of auxiliary facilities (1). Oxygen blower increases oxygen.
It has the advantages of large air volume, stable wind pressure and no oil pollution, but its air source comes from unfiltered air with low oxygen content, and it is only suitable for open industrial fish farms with low fish density (fish load < 10 kg/m3). The oxygen generator adds oxygen. Oxygen-enriched (more than 90% oxygen content) or pure oxygen is prepared from the air, and it is introduced into the fish culture water body to achieve the purpose of increasing oxygen. It is suitable for closed circulating water fish farms with high fish density (fish carrying capacity > > 20kg/m3). Oxygen-enriched liquid oxygen tank
Heating: heating equipment (coal, gas, electricity), heat exchanger, waste heat, geothermal, etc. Developed countries such as Denmark. Cooling: indirect cooling of the exchanger (if there is insufficient underground seawater for aquaculture, we can consider using ordinary underground well water for indirect cooling-but only if we can extract well water at room temperature and the operating cost is low); If refrigeration equipment is used to cool down, the power consumption cost is too high. (2) Temperature control (3) Other supporting facilities
Water pumps, water pipelines, power transformation facilities, generator sets, bait processing, small cold storage, etc. A highly automated fishing ground: automatic control system.