甲苯对UASB反应器中溶解性微生物产物的影响

以乙酸钠为外加碳源,考察了UASB反应器内甲苯对可溶性微生物产物（SMP）的影响。实验结果表明：低质量浓度（20~70 mg/L）的甲苯对微生物有刺激作用,使得污泥增殖速率变小,SMP的质量浓度也逐渐减少,经过一段时间的驯化后,系统COD和TOC的去除率分别达到93%和94%以上,下降趋势较小；较高质量浓度（70~200 mg/L）的甲苯对微生物有抑制作用,污泥活性下降,反应器运行状况开始恶化,SMP的质量浓度也逐渐增大,经过一段时间的驯化后,系统COD和TOC的去除率分别维持在81%和83%以上；当甲苯质量浓度超过200 mg/L时,表现为污泥活性严重下降,对COD的去除效果极差。

Effects of Toluene on Soluble Microbial Products in UASB

The effects of toluene on soluble microbial products (SMP) in UASB were investigated using sodium acetate as external carbon source. The results show that toluene with low mass concentration (20-70 mg/L) has a stimulating effect on microorganism reducing the multiplication rate of activated sludge and the mass concentration of SMP,and after a period of acclimation,the removal rates of COD and TOC of the system can reach above 93% and 94% respectively with less decline；Toluene with high mass concentration (70-200 mg/L) has an inhibitory effect on microorganism causing the decline of sludge activity,worsening the reactor running and increasing the mass concentration of SMP,after a period of acclimation,the removal rates of COD and TOC of the system can remain above 81% and 83% respectively；When the toluene mass concentration is over 200 mg/L,the sludge activity will decline seriously with bad COD removal effect.