【摘要】：經(jīng)精確測定AOB和NOB的溶解氧半速度常數(shù)及其他動力學(xué)參數(shù),研究在AOB溶解氧親和力低于NOB條件下,在序批反應(yīng)器中短程硝化實(shí)現(xiàn)機(jī)制.測得AOB和NOB的溶解氧半速度常數(shù)分別為0.46和0.14mg O_2/L.在這種條件下,AOB的最大比生長速率高于NOB是實(shí)現(xiàn)短程硝化的重要特點(diǎn),測得的AOB和NOB最大比生長速率分別為0.65和0.45d~(-1).兩級硝化數(shù)學(xué)模擬的結(jié)果表明,在AOB的溶解氧親和力低于NOB條件下,低溶解氧和高泥齡都不利于短程硝化實(shí)現(xiàn),而較高溶解氧和低泥齡的組合條件有利于短程硝化實(shí)現(xiàn).在序批反應(yīng)中的實(shí)驗(yàn)結(jié)果驗(yàn)證了數(shù)學(xué)模擬結(jié)論的正確性.
[Abstract]:The mechanism of short cut nitrification in sequencing batch reactor was studied under the condition that the dissolved oxygen affinity of AOB and NOB was lower than that of NOB. The dissolved oxygen half-velocity constants of AOB and NOB are 0.46 and 0.14mg O _ (2 / L), respectively. Under these conditions, the maximum specific growth rate of NOB is higher than that of NOB, and the maximum specific growth rates of AOB and NOB are 0.65 and 0.45 days ~ (-1), respectively. The results of mathematical simulation of two-stage nitrification showed that under the condition of lower dissolved oxygen affinity of AOB than that of NOB, both low dissolved oxygen and high mud age were not conducive to the realization of short-cut nitrification, while the combination of higher dissolved oxygen and lower mud age was beneficial to the realization of short-cut nitrification. The experimental results in the sequence batch reaction verify the correctness of the mathematical simulation results.
【作者單位】： 揚(yáng)州大學(xué)環(huán)境科學(xué)與工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51478410) 揚(yáng)州大學(xué)高端人才項(xiàng)目
【分類號】：X703.1
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本文編號：2155656