Long Bei-Sheng, Liu Xun-Lei, Liu Hong-Bo, Yang Jing-Xin, Yuan Shu-Sen
School of Water Conservancy and Environment Engineering, Changchun Institute of Technology, Changchun 130012, China.
Jilin Zoratech Environmental Engineering Company Limited, Changchun 130031, China.
Huan Jing Ke Xue. 2018 Jun 8;39(6):2756-2762. doi: 10.13227/j.hjkx.201710135.
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 (NO-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, 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 NO-N accumulation rate above 98% under the conditions of sufficient alkalinity, temperature 23-24℃, and DO 0.7-1.0 mg·L 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.
采用某玉米淀粉公司废水处理站的厌氧出水（C/N为0.93 - 1.53），在SBR反应器中研究了一种快速启动的短程硝化方法，该方法利用高温、高pH值、低溶解氧等抑制因素。针对已启动的短程硝化系统，在取消高pH值和高温限制因素后，进一步研究其稳定性和控制策略。结果表明，当控制温度为（30±1）℃、pH值为7.8 - 8.2、常规硝化段溶解氧为0.7 - 1.0 mg·L，并结合硝化过程中pH值和溶解氧参数的在线控制时，经过17个周期的驯化培养，可快速启动短程硝化（亚硝酸盐氮积累率高于80%）。对于已启动的短程硝化系统，当取消高pH值和高温限制时，在常规硝化段碱度充足、温度为23 - 24℃、溶解氧为0.7 - 1.0 mg·L，并结合硝化过程在线控制的条件下，可实现亚硝酸盐氮积累率高于98%的短程硝化长期稳定运行。控制策略可总结为：首先在高温、高pH值和相对低溶解氧抑制因素下快速启动短程硝化系统，然后消除高pH值和高温限制因素。该控制策略对于实现氨氮浓度较高且温度较高的玉米淀粉废水的长期稳定短程硝化具有良好的实际意义。
