Nitrogen removal during anaerobic digestion of wasted activated sludge under supplementing Fe(III) compounds
Nitrogen removal during anaerobic digestion of wasted activated sludge under supplementing Fe(III) compounds
复制标题
添加 Fe(III) 化合物的废弃活性污泥厌氧消化过程中的脱氮
DOI：
10.1016/j.cej.2017.09.133
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发表时间：
2018-01
影响因子：
15.1
通讯作者：
Peng Hong
中科院分区：
文献类型：
--
作者：
Yang Yafei;Zhang Yaobin;Li Yue;Zhao Huimin;Peng Hong
厌氧氨氧化结合Fe（III）还原，即，Feammox在自然环境中的氮循环中起着重要的作用，但在废水/固体处理过程中却很少被研究。氨氮是污泥厌氧消化过程中含氮物质分解的副产物，其含量较高，对环境具有较大的危害。本研究主要研究了在污泥厌氧消化过程中添加Fe（III）化合物的效果，特别是评价了Fe（III）化合物在污泥厌氧消化脱氮中的作用。在厌氧消化池中添加磁铁矿、Fe 2 O3和Fe（OH）3均能提高甲烷产量和污泥减量。重要的是，这些Fe（III）化合物诱导Feammox连续发生。在添加Fe（III）的反应器中，特别是添加Fe（OH）3的反应器中产生了NO2-和NO3-。之后，NOx−将被有机物或Fe（II）作为电子供体还原。因此，在添加Fe（OH）3的反应器中，40天后去除了20.1%的总氮。作为异化铁还原（包括Feammox）的产物，Feammox中Fe（II）的含量远低于化学计量NH 4+去除的理论产量，这意味着可能发生Fe（II）/Fe（III）循环，从而引发氮的连续损失。
Anaerobic ammonium oxidation coupled to Fe(III) reduction, i.e., Feammox, is playing an important part in nitrogen cycle of natural environments, which however has been rarely investigated in waste water/solid treatment processes. Ammonium as a byproduct of nitrogenous substance decomposition during anaerobic digestion of waste activated sludge usually presents a quite high content and poses a great risk to environment. This study focused on investigating the effects of supplementing Fe(III) compounds in anaerobic digestion of sludge and especially evaluating the roles in nitrogen removal. Supplementing magnetite, Fe2O3and Fe(OH)3in anaerobic digesters all increased the methane production and sludge reduction. Importantly, these Fe(III) compounds induced Feammox to occur continuously. NO2−and NO3−were generated in the Fe(III)-added reactors, especially in Fe(OH)3-added reactor. Afterwards, NOx−would be reduced with organics or Fe(II) as electron donors. Consequently, 20.1% of total nitrogen was removed in Fe(OH)3-added reactor after 40 days. As a product of dissimilatory iron reduction (including Feammox), the Fe(II) content was far less than theoretical production through the stoichiometrical NH4+removal in Feammox, implying that the Fe(II)/Fe(III) cycle likely occurred to trigger the successive nitrogen loss.
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影响因子：
5.2
作者：
Picardal F
通讯作者：
Picardal F
厌氧污泥消化添加颗粒活性炭促进甲烷产生和污泥分解
影响因子：
11.1
作者：
Yang Yafei;Zhang Yaobin;Li Zeyu;Zhao Zhiqiang;Quan Xie;Zhao Zisheng
通讯作者：
Zhao Zisheng
影响因子：
4.4
作者：
LOVLEY, DR;PHILLIPS, EJP
通讯作者：
PHILLIPS, EJP
影响因子：
--
作者：
Shrestha, Junu;Rich, Jeremy J.;Jaffe, Peterd R.
通讯作者：
Jaffe, Peterd R.
影响因子：
11.4
作者：
Viggi, Carolina Cruz;Rossetti, Simona;Aulenta, Federico
通讯作者：
Aulenta, Federico