抗高盐菌株的驯化及其对高盐含氮废水的处理

针对生物处理法处理高盐废水时普遍存在微生物易失活甚至死亡的问题,在上流式固定床反应器中,通过小幅度提高进水盐度来驯化抗高盐厌氧氨氧化菌株。实验结果表明,盐度从0增加至30g/L,系统对氨氮、亚硝氮、总氮的去除率平均值分别为72.56%、92.54%、73.83%,氨氮、亚硝氮、总氮的容积负荷去除分别为0.81、1.03、1.74kg/(m3·d);盐度高于30g/L时,细菌活性受到抑制,系统脱氮能力显著下降;减小盐度,细菌活性恢复。此外,系统能较快适应负荷的变化,具有较强的抗负荷冲击的能力。

Acclimatization of Anammox bacteria for biology treatment of high-salt wastewater

In order to solve bacteria deactivation or even death in the biological treatment of high-salt wastewater,an upflow anaerobic sludge blanket(UASB) reactor was used for acclimatization of Anammox bacteria.The salt concentration of influent was increased in small step from 0 to 30 g/L.Experimental results show that the average removal efficiency for NH+4-N、NO-2-N and total nitrogen are 72.56%,92.54%,73.83%,the removal rate for NH+4-N、NO-2-N and total nitrogen are 0.81,1.03,1.74 kg/(m3·d) respectively.When the salt concentration is over 30 g/L,nitrogen removal of the system is sharply decreased because the activities of the bacteria are restricted.The activities of the bacteria are recovered after salinity was below 30 g/L.Moreover,the system can resist influent load impulsion and quickly adapt to the change of nitrogen loading.