间歇投加碳源模式下SND的脱氮效能

Nitrogen Removal Efficiency of Simultaneous Nitrification and Denitrification(SND)Under the Mode of Intermittent Carbon Source Addition

采用模拟碳源偏低的城市污水,于连续曝气的SBR内,在不同间歇投加碳源的模式下,考察氮转化和DO、ORP及pH的变化规律。结果表明,随间歇投加碳源次数的增加,同步硝化反硝化(SND)的脱氮效率得到提高,DO浓度和ORP值的波动降低。由此可知,间歇多次投加碳源的运行模式是碳源偏低城市污水实现稳定而高效脱氮SND的有效控制策略。

The profiles of TN, NO3^--N, NH3-N, NO2^--N, DO, ORP and pH are examined in a SBR operating on continuous aeration and treating synthetic wastewater under the different modes of intermittent carbon source addition. It can be found that the TN removal rates of SND increases and the variation of DO and ORP decrease with the increasing of intermittent carbon source addition times. The results suggest that the mode of intermittent carbon addition with many times is an effective performance for the stable SND with effective nitrogen removal of municipal wastewater provided with character of low carbon.