Pyridine and pyridine based products are of major concern as environmental pollutants due to their recalcitrant, persistent, toxic and teratogenic nature. In this study, we describe biodegradation of pyridine by an isolated consortium/strain under aerobic condition. Batch experiment results reveal that at lower initial pyridine concentrations (1-20 mg l(-1)), almost complete degradation was observed whereas at higher concentration (30-50 mg l(-1)), the degradation efficiency was dropped significantly. This may be due to inhibitory effect of pyridine at higher concentrations. The value of decay and yield coefficient was also determined. Furthermore, the bio-augmentation of isolated consortium/strain into the activated sludge consortium in different quantity has been also done and the effect of bio-augmentation on degradation has been studied. The results reveal that as the quantity of bio-augmentation increases, the degradation of pyridine increases. At 25% bio-augmentation, complete degradation of 20 mg l(-1) of pyridine can be achieved within 96 h of incubation. Thus, the study concluded that the bio-augmentation of the isolated consortium/strain into the sludge enhances the pyridine degradation efficiency of the biomass.

中文翻译：

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通过分离的细菌财团/菌株对吡啶进行生物降解，并将菌株生物增强为活性污泥，以增强吡啶的生物降解。

吡啶和吡啶基产品因其顽强，持久，有毒和致畸性而作为环境污染物而受到关注。在这项研究中，我们描述了有氧条件下分离的财团/菌株对吡啶的生物降解作用。批处理实验结果表明，在较低的吡啶初始浓度（1-20 mg l（-1））下，观察到几乎完全降解，而在较高的吡啶浓度（30-50 mg l（-1））下，降解效率显着下降。这可能是由于吡啶在较高浓度下的抑制作用。还确定了衰减值和屈服系数。此外，还进行了分离的财团/菌株向不同数量的活性污泥财团中的生物强化，并研究了生物强化对降解的影响。结果表明，随着生物增强量的增加，吡啶的降解增加。在25％的生物增强作用下，可在温育96小时内实现20 mg l（-1）吡啶的完全降解。因此，该研究得出的结论是，分离的聚生体/菌株向污泥中的生物增强增强了生物质的吡啶降解效率。