【摘要】 低浓度氨氮废水的处理一直是近年来的研究热点和难点,各种处理工艺的运行并不稳定,出水氨氮浓度经常超标。本文对pH、碱度和有毒物质苯酚等影响低浓度氨氮废水处理工艺运行的主要因素进行了研究。结果表明:低浓度氨氮废水处理的最优pH在9左右,偏碱性的环境更有利于低浓度氨氮废水的处理;Alk/N=38.39(此时pH=8.7)时,低浓度氨氮硝化速率接近最大值,充足的碱度有利于低浓度氨氮的彻底硝化;苯酚对硝化污泥的抑制为非竞争性抑制;达到相同的氨氮出水浓度,苯酚抑制条件下泥龄大于无抑制情况,且抑制程度越高,所需泥龄越长。低浓度氨氮硝化污泥一旦受到苯酚的抑制,很难通过控制泥龄的途径得到解决。更多还原

【Abstract】 Recently the treatment of low concentration ammonia nitrogen wastewater was taken more seriously, and the ammonia effluent of many treatment processes fluctuated frequently. So in this paper, the effects of pH?Alkalinity and phenol on the treatment technology of low concentration ammonia nitrogen were discussed. The results indicated that: the optimal pH of low concentration ammonia nitrification was 9, and the alkaline condition is favorable to achieve complete nitrification at low ammonia concentration. When the ALK/N=38.39(pH=8.7), the nitrification rate achieved the maximum value. The inhibition types of phenol on nitrification at low ammonia concentration all was non-competitive, and the effluent ammonia in the presence of phenol was higher than that of no inhibitor under the condition of the same SRT, and the higher the phenol concentration was, the higher the effluent ammonia was. It was very difficult for the nitrifying sludge at low ammonia concentration to recover nitrification ability by changing SRT.更多还原