total nitrogen tn removal efficiency
total nitrogen tn removal efficiency
总氮tn去除效率
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The COD, ammonia and total nitrogen (TN) removal efficiency were studied in the paper at low DO concentration in a pilot-scale A/O nitrogen removal plant treating domestic wastewater.
应用A/O中试装置处理实际生活污水，研究了低DO浓度下系统对有机物、氨氮和总氮的去除效果。
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