不同来源菌种对苯系化合物生物降解性的比较

研究了从城市污水处理场和石油化工废水处理场曝气池活性污泥中富集的混合菌种对苯，甲苯，乙基苯，邻二甲苯，间二甲苯和对二甲苯６种化合物的生物降解性。在相同的生物试验条件下，比较了２类不同来源菌种对被试验化合物代谢过程在耐受化合物浓度，降解启动工作服

Comparison of Biodegradability of Aromatic Hydrocarbons by Mixed Bacteria from Different Sources

he biodegradability of benzene, toluene,ethylbenzene,o-,m- and p-xylene by mixed cultures enriched from two activated sludges was studied.The sludges were obtained from two wastewater treatment plants receiving municipal and petro chemical wastewater respectively.The different of biodegradability represented on the lag time, the degraded ratio and the biodegradable degree in both cultures under the same blotest condition with different tested compounds concentration were discussed.The results indicated that the six tested compounds can be biodegraded in different degree in both cultures.The special bacteria for degradation o-, m- and p-xylene were separated from enriched activated sludge of the petrochemical wastewater treatment plant, and the ratio of degradation of three xylenes could reach a hundred percent.The degradable order of the six tested compounds in both culture was ranked according to the rate of degradation.