The present invention relates to an eel farm water treatment system. More specifically, to convert sewage containing excrement piled up in a raising tank and other organic solids such as fodder residues into water having improved quality and having plenty of oxygen and to re-circulate the water to the raising tank, the sewage is made to pass through a plurality of precipitation tanks, a screen, and multiple aeration tanks. Fixing members for collecting microorganisms are installed in the precipitation tanks, and fluidic members for transferring oxygen and harmful gases are installed in the aeration tanks. To this end, the eel farm water treatment system according to the present invention comprises: a plurality of raising tanks (10) for storing circulation water capable of raising eels； a precipitating and decomposing tank (20) provided with the circulation water discharged from the raising tank, and decomposing and precipitating adulterants； a screen tank (30) for filtering adulterants by being provided with the circulation water filtered by being precipitated and decomposed from the precipitating and decomposing tank； a decomposing tank (40) for decomposing adulterants by being provided with the circulation water filtered from the screen； and an aeration tank (50) for decomposing adulterants by being provided with circulation water decomposed and filtered from the decomposing tank. Fixing rods are formed in the precipitating and decomposing tank and the decomposing tank, and fixing members (60) fixed to the fixing rods (B) are formed. An aeration device (80) is formed at the bottom of the aeration tank, and fluidic members (70) flowing in the aeration tank by means of aerating force of the aeration device are formed.본 발명은 양만장용 수처리 시스템에 관한 것으로서, 보다 상세하게는 사육조에 쌓이는 배설물과 사료 찌꺼기 등 기타 유기질 고형물을 함유한 오수가 풍부한 산소를 갖는 개선된 수질로 전환된 후 다시 사육조로 순환될 수 있도록 오수가 복수의 침전조, 스트린 및 다수의 폭기조를 통과하도록 하되, 침전조에는 미생물을 포집하는 고정상 부재를 설치하고, 폭기조에는 산소 및 유해가스를 운반하는 유동상 부재를 설치한 양만장용 수처리 시스템에 관한 것이다. 이를
