喹啉与葡萄糖共基质条件下生物降解的动力学分析

研究了在喹啉与葡萄糖共基质时皮氏伯克霍尔得氏菌 (Burkholderiapickettii)对二者的降解动力学 .结果表明 :在共基质条件下 ,喹啉与葡萄糖能同时被微生物降解 .葡萄糖的存在对喹啉的生物降解起到一定的促进作用 ,而喹啉的存在减慢了微生物对葡萄糖的降解作用 .5 0mg·L-1喹啉与 34、6 0、110mg·L-1葡萄糖共基质时 ,喹啉与葡萄糖的降解都遵循一级反应动力学 .30 0mg·L-1喹啉与 110、32 0、6 90mg·L-1葡萄糖共基质时 ,喹啉的降解已不遵循一级或零级反应 ,而葡萄糖在 110mg·L-1时仍为一级反应 ,增到 32 0、6 90mg·L-1时转变为零级反应动力学

Biodegradation kinetics of a mixture containing quinoline and glucose by burkholderia pickettii strain

The kinetics of utilization of a mixture of quinoline and glucose by Burkholderia pickettii was studied. It was found that quinoline and glucose can be degraded by the bacteria simultaneously, and the biodegradation rate of quinoline was increased in the presence of glucose, while glucose degradation was inhibited by quinoline. The kinetics of both quinoline and glucose follow first-order model at the mixture concentration of 50mg·L^-1 quinoline with 34, 60 or 110mg·L^-1 glucose. When the co-substrates concentration changed to 300mg·L^-1 quinoline with 110, 320 or 690mg·L^-1 glucose, quinoline degradation no longer followed first-order model, although glucose degradation was still first-order at glucose concentration 110mg·L^-1 , glucose kinetics at glucose concentration 320 and 690mg·L^-1 was changed to zero-order.