發(fā)布時間：2018-04-03 23:42

  本文選題：循環(huán)水養(yǎng)殖　切入點：生物流化床　出處：《漁業(yè)現(xiàn)代化》2017年06期

【摘要】：在實驗室規(guī)模下,以旋轉(zhuǎn)式生物流化床(CB-FSB)為研究對象,研究了初始總氨氮(TAN)、水溫及濾料膨脹率3種條件下,海水生物流化床生物過濾功能啟動期間TAN和亞硝酸鹽氮(NO-2-N)去除及amoA基因數(shù)量的變化。結(jié)果顯示:生物流化床生物過濾功能啟動所需時間隨著水溫的升高而縮短,在水溫為15℃、20℃和25℃時,啟動所需時間分別為27 d、25 d和23 d;初始TAN質(zhì)量濃度的升高也會縮短生物流化床生物過濾功能啟動所需要的時間,在初始TAN質(zhì)量濃度為1 mg/L、2 mg/L、4 mg/L時,啟動所需時間分別為24 d、22 d和21 d;在膨脹率為100%和150%時,啟動所需時間無明顯差別,分別為21 d和20 d,明顯好于膨脹率為50%時啟動所需時間27 d;amoA基因的數(shù)量變化與TAN去除率的變化有一定的相關(guān)性,并隨著初始TAN濃度的升高而增多,在4 mg/L時數(shù)量最多,達到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，

本文編號：1707418