生物净化低温高铁锰氨氮地下水氨氮去除机制
发布时间:2019-03-21 18:03
【摘要】:在某水厂,对"两级曝气+两级过滤"生物净化工艺净化低温高铁锰氨氮(5~7.8℃,Fe_(2+)8.0mg/L,Mn~(2+)3.0mg/L,NH_4~+-N3.0mg/L)地下水过程中,氨氮去除机制进行了试验研究.试验表明:一级和二级滤柱分别存在45.22%和35.97%的氮素损失(TN_(loss)),DO实际耗值分别比理论值少24.67%和22.27%.利用DO计量关系证明TN_(loss)过程是耗氧过程,TN_(loss)与TN_(loss)的DO耗值线性相关性较好,R20.970.分析表明:TN_(loss)产生于自养脱氮过程,与吸附、生物同化、异养反硝化和锰氧化耦合反硝化机制无关.利用氮素守恒和DO计量关系定量计算,一级和二级滤柱分别有51.40%、40.93%的氨氮由自养脱氮过程去除.生物硝化耦合自养脱氮是氨氮去除的主要途径,且进水氨氮浓度越高,自养脱氮比例越高.
[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,
本文编号: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,
本文编号:2445187
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