CAJ | 학술논문

通过在全封闭循环水系统中养殖半滑舌鳎(Cynoglossus semilaevis Gunthe),研究了不同气水比对曝气生物滤池净化效能,以及对DO、pH值的影响。结果表明：本试验系统在温度为(19±1)℃,系统循环次数为15次,养殖池DO保持在12 mg/L以上的运行条件下,随着气水比由0.75：1~1.50：1的增加,生物滤池氨氮的去除率由35.0%增加至52.0%, NO2?N的去除率由8.2%增加至44.6%,气水比对硝化反应影响显著,但对化学需氧量COD的去除率影响并不显著,其平均去除率为10.14%； pH 值有增加的趋势,生物滤池进水口到出水口的 pH 值由7.97增加至8.08；气水比最佳运行参数为1.25：1。同时还发现1级生物滤池进水口DO接近饱和,1级到末级滤池间DO仅降低了10%左右,系统pH值在7.9~8.1。本研究所获参数,可供生物膜法处理养殖循环水的条件优化作参考。
통과재전봉폐순배수계통중양식반활설탑(Cynoglossus semilaevis Gunthe),연구료불동기수비대폭기생물려지정화효능,이급대DO、pH치적영향。결과표명：본시험계통재온도위(19±1)℃,계통순배차수위15차,양식지DO보지재12 mg/L이상적운행조건하,수착기수비유0.75：1~1.50：1적증가,생물려지안담적거제솔유35.0%증가지52.0%, NO2?N적거제솔유8.2%증가지44.6%,기수비대초화반응영향현저,단대화학수양량COD적거제솔영향병불현저,기평균거제솔위10.14%； pH 치유증가적추세,생물려지진수구도출수구적 pH 치유7.97증가지8.08；기수비최가운행삼수위1.25：1。동시환발현1급생물려지진수구DO접근포화,1급도말급려지간DO부강저료10%좌우,계통pH치재7.9~8.1。본연구소획삼수,가공생물막법처리양식순배수적조건우화작삼고。
The half-smooth tongue-sole (Cynoglossus semilaevis Gunthe) is commonly reared in a recirculating aquaculture system. We evaluated the effect of the air-to-liquid ratio on the purification efficiency, DO, and pH in the biological aerated filters of a recirculating system. The test system was maintained at (19 ±1)℃ and 15 cycles. The DO in the tank remained above 12 mg/L. As the air-to-liquid ratio increased from 0.75:1 to 1.50:1, the removal rate of TAN increased from 35.0% to 52.0%, and the removal rate of NO2-N increased from 8.2% to 44.6%. Thus, the air-to-liquid ratio had a significant impact on nitrification, whereas the influence of chemical oxygen demand (COD) removal rate was not significant. The average removal rate was 10.14%. The pH values increased from 7.97 to 8.08 but decreased between the biofilter inlet and the outlet. The optimal air-to-liquid ratio was 1.25:1. This resulted in DO levels at the inlet of the first bio-filter tank that were close to saturation. Between the first bio-filter tank and the final bio-filter tank, DO only decreased by 10%. The recirculation aquaculture system maintained the water pH value between 7.9 and 8.1. Our results provide a reference for optimization of bio-film process culture conditions.