生物凈化低溫高鐵錳氨氮地下水氨氮去除機制
發(fā)布時間:2019-03-21 18:03
【摘要】:在某水廠,對"兩級曝氣+兩級過濾"生物凈化工藝凈化低溫高鐵錳氨氮(5~7.8℃,Fe_(2+)8.0mg/L,Mn~(2+)3.0mg/L,NH_4~+-N3.0mg/L)地下水過程中,氨氮去除機制進行了試驗研究.試驗表明:一級和二級濾柱分別存在45.22%和35.97%的氮素損失(TN_(loss)),DO實際耗值分別比理論值少24.67%和22.27%.利用DO計量關系證明TN_(loss)過程是耗氧過程,TN_(loss)與TN_(loss)的DO耗值線性相關性較好,R20.970.分析表明:TN_(loss)產(chǎn)生于自養(yǎng)脫氮過程,與吸附、生物同化、異養(yǎng)反硝化和錳氧化耦合反硝化機制無關.利用氮素守恒和DO計量關系定量計算,一級和二級濾柱分別有51.40%、40.93%的氨氮由自養(yǎng)脫氮過程去除.生物硝化耦合自養(yǎng)脫氮是氨氮去除的主要途徑,且進水氨氮濃度越高,自養(yǎng)脫氮比例越高.
[Abstract]:In a water plant, a biological purification process of "two-stage aeration and two-stage filtration" was carried out to purify groundwater at low temperature (5? 7.8 鈩,
本文編號:2445187
[Abstract]:In a water plant, a biological purification process of "two-stage aeration and two-stage filtration" was carried out to purify groundwater at low temperature (5? 7.8 鈩,
本文編號:2445187
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