N(2)O production during nitrogen removal via nitrite from domestic wastewater: main sources and control method.
N(2)O production during nitrogen removal via nitrite from domestic wastewater: main sources and control method.
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DOI：
10.1021/es9019113
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发表时间：
2009-11
影响因子：
11.4
通讯作者：
Qing Yang;Xiuhong Liu;C. Peng;Shu-ying Wang;Hong-wei Sun;Yongzhen Peng
中科院分区：
文献类型：
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作者：
Qing Yang;Xiuhong Liu;C. Peng;Shu-ying Wang;Hong-wei Sun;Yongzhen Peng
亚硝酸盐被普遍认为是产生N(2)O的重要因素，这削弱了亚硝酸盐脱氮的优势。为了减少和控制污水处理厂的N(2)O产生，通过长期和批量试验研究了实际生活废水中亚硝酸盐脱氮过程中N(2)O产生的主要来源和途径。结果表明，亚硝酸盐脱氮过程中N(2)O的产生量是硝酸盐脱氮过程的1.5倍。进一步证明了氨氧化是生活污水脱氮过程中N(2)O生成的主要来源；而在亚硝酸盐氧化和缺氧反硝化过程中，几乎不产生N(2)O。阶梯式进料SBR对N(2)O生成的前体亚硝酸盐和氨进行了有效控制，使亚硝酸盐脱氮过程中N(2)O的生成减少了约50%。因此，阶梯式进料系统被推荐为减少生活废水亚硝酸盐脱氮过程中N(2)O产生量的有效方法。
Nitrite has been commonly recognized as an important factor causing N(2)O production, which weakened the advantages of nitrogen removal via nitrite. To reduce and control N(2)O production from wastewater treatment plants, both long-term and batch tests were carried out to investigate main sources and pathways of N(2)O production during nitrogen removal via nitrite from real domestic wastewater. The obtained results showed that N(2)O production during nitrogen removal via nitrite was 1.5 times as much as that during nitrogen removal via nitrate. It was further demonstrated that ammonia oxidization were main source of N(2)O production during nitrogen removal from domestic wastewater; whereas, almost no N(2)O was produced during nitrite oxidization and anoxic denitrification. N(2)O production during nitrogen removal via nitrite decreased about 50% by applying the step-feed SBR, due to the effective control of nitrite and ammonia, the precursors of N(2)O production. Therefore, the step-feed system is recommended as an effective method to reduce N(2)O production during nitrogen removal via nitrite from domestic wastewater.