84消毒剂对活性污泥降酚效能的影响

The effect of 84 disinfectant on phenol reduction efficiency of activated sludge

针对序批式活性污泥工艺(SBR),分析了84消毒剂对含酚废水处理效能的影响,确定了浓度阈值,通过毒理学特性及胞外聚合物(EPS)变化分析了84消毒液的毒性机制。结果表明:当浓度小于2 mg/L时,84消毒剂提高了脱氢酶(DHA)及苯酚降解酶活性并促进ATP产生,EPS中的蛋白质(PN)和多糖(PS)的含量随84消毒剂浓度升高而降低;当浓度大于2 mg/L时,相关酶活性降低并抑制ATP产生,活性氧(ROS)、乳酸脱氢酶(LDH)、PN、PS的含量升高。

The effect of 84 disinfectant on the treatment of phenol-containing wastewater by sequencing batch reactor(SBR)process was analyzed,and the concentration threshold of 84 disinfectant was determined.The toxicity mechanism of 84 disinfectant was analyzed based on toxicological characteristics and changes of extracellular polymeric substances(EPS).The results indicated that when the concentration of 84 disinfectant was less than 2 mg/L,the addition of 84 disinfectant would improve the activities of dehydrogenase(DHA)and phenol degrading enzymes and promote the production of ATP.The contents of protein(PN)and polysaccharide(PS)in EPS decreased with the increase of 84 disinfectant concentration.When the concentration of 84 disinfectant was more than 2 mg/L,the activity of related enzymes was decreased,the production of ATP was inhibited,and the contents of reactive oxygen species(ROS),lactate dehydrogenase(LDH),PN and PS was increased.