生物强化技术应急处理苯胺泄漏事故

为考察生物强化技术用于苯胺水污染事故应急处理的可行性,以化工园区苯胺泄漏事故为场景,采用高效苯胺降解菌AN-P1强化序批式活性污泥法(SBR),应急处理100～500 mg/L苯胺废水。结果表明,生物强化系统应急处理500 mg/L以下苯胺废水,启动时间约3～4周期(2 d),稳定运行后对苯胺的去除率在96.3%以上,化学需氧量(COD)的去除率在81.3%以上;曝气量(溶解氧)是影响降解的制约因素,其最适曝气量为0.5 m3/h。对处理系统中微生物超氧化物歧化酶(SOD)检测表明,强化系统SOD被诱导产生,对照系统中SOD被抑制,强化系统SOD酶活是对照系统的468倍,表明强化系统可有效消除苯胺降解产生的超氧阴离子自由基的氧化压力。

Bioaugmentation technology for emergency treatment of aniline leakage accidents

To test the feasibility of bioaugmentation in emergent treatment of aniline pollution accident, the method of bioaugmentation which based on Bacterium AN-P1 adding to the sequencing batch reactor (SBR) was researched. Simulative aniline leak accident happened in a chemical industrial area. The results show that the enhanced SBR system has the ability to degrade 500 mg/L aniline (and below), and the removal rates of aniline and chemical oxygen demand (COD) are over 96.3% and 81.3%, respectively. Start-up time is about 3~4 cycles (2 days). The study of aeration flux reveals that the optimal condition is 0.5 m³/h. Superoxide dismutase (SOD) is induced in enhanced SBR, while is inhibited in the control group. The SOD activity in strengthen system is about 468 times of the control one. The study indicates that enhance SBR system can eliminated the superoxide anion radical oxidative stress which causes by aniline degradation.