| 玉米淀粉废水短程硝化快速启动及其稳定性 |
| 摘要点击 1812 全文点击 586 投稿时间：2017-10-19 修订日期：2017-11-25 |
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| 中文关键词 玉米淀粉废水 短程硝化 氨氮 温度 pH DO NO2--N积累率 |
| 英文关键词 corn starch wastewater shortcut nitrification ammonia nitrogen temperature pH DO NO2--N accumulation rate |
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| 中文摘要 |
| 采用SBR反应器，以玉米淀粉企业废水处理站厌氧段出水（C/N 0.93~1.53）为对象，研究了利用高温、高pH和低DO等抑制因素，快速启动短程硝化的方法；针对启动的短程硝化系统，进一步研究了取消高pH及高温抑制因素后系统短程硝化的稳定性及其控制策略.结果表明，控制温度为（30±1）℃、pH为7.8~8.2、正常硝化段DO为0.7~1.0 mg·L-1，同时结合pH和DO参数对硝化过程的在线控制，可以经过17个周期的驯化培养，快速启动短程硝化（NO2--N积累率超过80%）；对于已启动的短程硝化系统，取消对高pH及高温的限制，在碱度充足、温度为23~24℃和正常硝化段DO为0.7~1.0 mg·L-1的条件下，并结合对硝化过程的在线控制，最终可以获得NO2--N积累率超过98%的短程硝化长期稳定运行.先采用高温、高pH和低DO等抑制因素快速启动短程硝化，然后再取消对系统高pH及高温限制的控制策略，对于具备较高氨氮浓度和较高温度的现场玉米淀粉废水实现长期稳定的短程硝化具有现实意义. |
| 英文摘要 |
| A rapid startup shortcut nitrification method is researched with suppression factors, such as high temperature, high pH, low DO, etc., in a SBR reactor, with anaerobic effluent (C/N 0.93-1.53) from a certain corn starch company wastewater treatment station. Targeting the already started up shortcut nitrification system, the stability and control strategy are studied further after cancelling the high pH and high temperature limiting factors. Results show that shortcut nitrification (NO2--N accumulation rate above 80%) can be quick-started after 17 cycles of domestication and culture when the controlling temperature is (30±1)℃, the pH is 7.8-8.2, and the DO of the regular nitrification section is 0.7-1.0 mg·L-1, combined with on-line control of the pH and DO parameters in the nitrification process. When the limits of high pH and high temperature are cancelled for the already started-up shortcut nitrification system, long-term stable operation can be obtained for a shortcut nitrification of NO2--N accumulation rate above 98% under the conditions of sufficient alkalinity, temperature 23-24℃, and DO 0.7-1.0 mg·L-1 in the regular nitrification section, combined with the on-line control of nitrification process. The control strategies can be summarized as: first, the shortcut nitrification is rapidly started up under high temperature, high pH, and relatively low DO suppression factors, and then the high pH and high temperature limitation factors are eliminated. The control strategies have good practical significance for realizing the long-term stable shortcut nitrification for corn starch wastewater with relatively high ammonia nitrogen concentration and relatively high temperature. |
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