三种因素对海水生物流化床启动期间营养盐去除及amoA基因表达的影响

发布时间：2018-04-03 23:42

  本文选题：循环水养殖　切入点：生物流化床　出处：《渔业现代化》2017年06期

【摘要】：在实验室规模下,以旋转式生物流化床(CB-FSB)为研究对象,研究了初始总氨氮(TAN)、水温及滤料膨胀率3种条件下,海水生物流化床生物过滤功能启动期间TAN和亚硝酸盐氮(NO-2-N)去除及amoA基因数量的变化。结果显示:生物流化床生物过滤功能启动所需时间随着水温的升高而缩短,在水温为15℃、20℃和25℃时,启动所需时间分别为27 d、25 d和23 d;初始TAN质量浓度的升高也会缩短生物流化床生物过滤功能启动所需要的时间,在初始TAN质量浓度为1 mg/L、2 mg/L、4 mg/L时,启动所需时间分别为24 d、22 d和21 d;在膨胀率为100%和150%时,启动所需时间无明显差别,分别为21 d和20 d,明显好于膨胀率为50%时启动所需时间27 d;amoA基因的数量变化与TAN去除率的变化有一定的相关性,并随着初始TAN浓度的升高而增多,在4 mg/L时数量最多,达到2.76×10~7copies/g。
[Abstract]:In the laboratory scale, the initial total ammonia nitrogen (TANN), water temperature and filter material expansion rate were studied under three conditions, namely, the rotary biological fluidized bed (CB-FSBs), the initial total ammonia nitrogen (TN), the water temperature and the filter media expansion rate.The removal of TAN and nitrite nitrite no-2-2-N and the change of amoA gene during the start-up of biological filtration function in seawater biological fluidized bed.The results showed that the start-up time of biofiltration was shortened with the increase of water temperature, when the water temperature was 15 鈩，

本文编号：1707418