Wu Guo-Dong, Yu De-Shuang, Li Jin, Zhou Tong, Wang Xiao-Jing
School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
Huan Jing Ke Xue. 2017 Jul 8;38(7):2917-2924. doi: 10.13227/j.hjkx.201612259.
In view of the poor performance of biological nitrogen removal in saline wastewater treatment, nitrogen removal of anaerobic ammonium oxidation(ANAMMOX) with K addition was studied. The results showed that K addition could strengthen nitrogen removal performance. The effect of K on ANAMMOX process was mainly divided into four stages. In the adaptive phase(0-2 mmol·L), sudden addition of K destroyed the original equilibrium reaction, but ultimately ANAMMOX bacteria could adapt to the presence of K. Because K had no obvious effects on anaerobic ammonia oxidation bacteria, the removal rates of NH-N and NO-N slightly increased. In the ascension phase(2-8 mmol·L), K played a role in promoting anaerobic ammonia oxidation biological systems, with increasing concentration of K, the removal rates of NH-N and NO-N significantly increased. In the stabilization phase(8-20 mmol·L), the nitrogen removal rate decreased, but was still higher than the control without K addition. In the inhibition phase(more than 20 mmol·L), K largely inhibited anaerobic ammonia oxidation, and its denitrification efficiency was lower than 0 mmol·L. In the whole cycle, when the concentration of K was 8 mmol·L, it achieved the best effect, the average removal rates of NH-N and NO-N were 89.24% and 84.87%, and NRR was 1.113 kg·(m·d).
鉴于含盐废水处理中生物脱氮性能较差，研究了添加钾对厌氧氨氧化（ANAMMOX）脱氮的影响。结果表明，添加钾可增强脱氮性能。钾对ANAMMOX过程的影响主要分为四个阶段。在适应阶段（0 - 2 mmol·L），突然添加钾破坏了原有的平衡反应，但最终ANAMMOX菌能够适应钾的存在。由于钾对厌氧氨氧化菌无明显影响，NH-N和NO-N的去除率略有增加。在上升阶段（2 - 8 mmol·L），钾对厌氧氨氧化生物系统起到促进作用，随着钾浓度的增加，NH-N和NO-N的去除率显著提高。在稳定阶段（8 - 20 mmol·L），脱氮率下降，但仍高于不添加钾的对照组。在抑制阶段（超过20 mmol·L），钾对厌氧氨氧化有较大抑制作用，其反硝化效率低于0 mmol·L。在整个周期中，当钾浓度为8 mmol·L时效果最佳，NH-N和NO-N的平均去除率分别为89.24%和84.87%，氮去除率（NRR）为1.113 kg·(m·d)。
