氨氮对UASB-ALR工艺处理晚期垃圾渗滤液的抑制性研究

Study on NH_4^+-N Inhibition on the Treatment of Later Landfill leachate by UASB-ALR

采用升流式厌氧污泥层反应器(UASB)-气升式环流反应器(ALR)的组合工艺处理高氨氮垃圾渗滤液。稳定运行阶段,通过添加氯化铵,考察NH4+-N浓度对UASB-ALR工艺稳定运行的影响。结果表明,当UASB进水氨氮浓度超过2 660mg/L时,UASB的有机物去除率下降到60%。当ALR进水中NH4+-N浓度达到3140 mg/L时,ALR对COD和NH4+-N去除率分别下降到12.8%和57%。经过7 d的恢复期,UASB对COD的去除率回升到78.5%,ALR反应器的COD及NH4+-N去除率均无法恢复到抑制前的水平。

Landfill leachate with high ammonia was treated by up-flow anaerobic sludge blanket reactor （UASB） -airlift loop reactor （ALR） process. The effect of NH4^＋-N concentration on the stable operation of UASB- ALR was studied by the addition of ammonium chloride during the stable period. The results showed that when the ammonia concentration of UASB influent exceeded 2 660 mg/L, the organics removal rate of UASB drops to 60%. When the influent NH4^＋ -N concentration of ALR reached 3 140 mg/L ,the COD and NH4^＋-N removal rate of ALR decreases to 12.8% and 57% respectively. After seven days recovery, the COD removal rate of UASB rises to 78.5%, but the COD and NH4＋ -N removal rate of ALR can not restore to the level before inhibition.