A circular filtration farming system is provided. The circulation filtration culture system, a breeding tank for storing the breeding water in which the organism is bred, the drum screen is connected to the breeding tank and the drainage pipe, and removes the solids primarily for the breeding water discharged from the breeding tank, A first pump providing power to transfer the first filtered breeding water from the drum screen, and the breeding water transferred by the first pump is sprayed through the spray nozzle installed in the ceiling, and the breeding water sprayed from the spray nozzle A biofiltration degassing apparatus including a filter medium for degassing carbon dioxide in water by colliding with particles, and discharging carbon dioxide gas degassed through the gas outlet installed in the ceiling, and degassing carbon dioxide stored in a storage space in the biofiltration degassing apparatus. A second pump providing power for feeding breeding water, and receiving breeding water transferred by the second pump Oxygen dissolving to further supply cattle, and UV sterilizer for sterilizing the ozone lamp for breeding water passing through the oxygen dissolving device, the breeding water passing through the UV sterilizer is back to the breeding tank A biofilm is formed on the surface of the filter medium to perform nitrification for breeding water, and the filter medium has a circular structure of 48 to 50 mm in diameter and 12 to 15 mm in height. A cylindrical support having a hole is disposed at the center thereof, and a plurality of plates having a fan wing structure are formed at an angle to the support.순환여과식 양식시스템이 제공된다. 상기 순환여과식 양식시스템은, 생물이 사육되는 사육수를 저장하는 사육수조, 상기 사육수조와 배수관을 통해 연결되며, 상기 사육수조에서 배출된 사육수에 대해 고형물을 1차적으로 제거하는 드럼스크린, 상기 드럼스크린에서 1차 여과된 사육수를 이송시키는 동력을 제공하는 제1 펌프, 상기 제1 펌프에 의해 이송된 사육수를 천정부에 설치된 살수노즐을 통해 분사하고, 상기 살수노즐에서 분사된 사육수 입자와 충돌하여 수중 이산화탄소를 탈기하는 여과재를 포함하고, 상기 천정부에 설치된 가스배출구를 통해 탈기된 이산화탄소 가스를 외부로 방출하는 생물여과 탈기장치, 상기 생물여과 탈기장치 내의 저장공간에 저장된 이산화
