高浓度酚降解菌的选育及其降酚性能

Culture and Biodegradation Performance for Phenol-Degrading Bacterium in High Phenol Concentration

以苯酚为唯一碳源,对活性污泥进行筛选及驯化,得到能降解高酚浓度的优势降酚菌.该混合菌在15h内将1700mg/L浓度的酚完全降解,同时使COD降至102.9mg/L,降解率达到96.9%.经分离纯化,得到4种不同的单一菌株,并对各菌株的菌属进行了初步鉴定.同时,还考察了初始酚浓度、菌投加量、温度、pH等因素对降酚菌降解COD和酚的影响.混合菌的降酚效果要优于所分离出的4种单菌株.

The activated sludge was acclimated by the inorganic salt medium containing phenol as the sole carbon source. The phenoldegrading bacterium obtained now can degrade completely phenol at initial concentration of 1700mg/L at 30℃ for 15h, and COD can be degraded by 96. 9%. Some factors effecting degradation of phenol and COD were studied, which include initial phenol concentration, quantity of bacterium, temperature and pH. Four strains of bacterium were isolated from the mixed phenol-degrading bacterium. It is shown that the degradation effect of mixed bacterium is superior to that of sole strain.