论文部分内容阅读
为了研究难降解有机物在共基质条件下的生物降解性能,从实验室的废水生物处理反应器内采集活性污泥样本,以吡啶为唯一碳、氮源筛选出来一株脱氮副球菌(Paracoccus denitrificans)W12,选择3种共基质:葡萄糖、苯酚和喹啉,研究了W12分别在这种基质中对吡啶降解的影响。结果表明:葡萄糖对吡啶的降解具有促进作用,但其促进作用存在一个最优点,过高浓度的葡萄糖不促进降解,甚至会减慢吡啶的降解。苯酚对吡啶的生物降解有抑制作用,且随着苯酚浓度的增大而增大。喹啉对吡啶的生物降解也有抑制作用,且随着喹啉的增大而增大,但W12在单基质和共基质下均不能降解苯酚和喹啉。
In order to study the biodegradability of refractory organic compounds under co-substrate conditions, activated sludge samples were collected from the laboratory wastewater biological treatment reactor, and one strain of Paracoccus denitrificans (Paracoccus denitrificans ) W12, three co-substrates were selected: glucose, phenol and quinoline to investigate the effect of W12 on pyridine degradation in this matrix, respectively. The results showed that glucose promoted the degradation of pyridine, but there was an optimal point of its promotion. Glucose did not promote the degradation and even slowed down the degradation of pyridine. Phenol can inhibit the biodegradation of pyridine, and increase with the increase of phenol concentration. Quinoline also inhibits the biodegradation of pyridine, and increases with the increase of quinoline. However, W12 can not degrade phenol and quinoline under single substrate and co-substrate.