大肠杆菌释磷与聚磷特性研究

Characteristic Research of Releasing and Accumulating Phosphorus by Escherichia

通过对分离得到的大肠杆菌在供给了不同浓度磷以及不同VFA混合碳源下其释磷与聚磷特性的研究,探讨了环境对纯种聚磷菌的磷代谢影响。结果表明,只有当供给的磷和VFA混合碳源达到一定配比且条件适合时,大肠杆菌才能表现出典型的厌氧释磷、好氧吸磷特性。传统方法分离出来的聚磷菌之所以表现出非生物强化吸磷特性,原因是没有给其提供适宜表现生物强化吸磷特性的环境。

Under different concentrations of phosphorus and VFA mixture supplied,the characteristic of phosphorus released and phosphorus accumulated for escherichia and the effect of conditions on phosphorus metabolism of pure PAOs were discussed. Results show that a typical characteristic of phosphorus released in anaerobic and phosphorus accumulated in aerobic by eseherichia, when the concentrations of phosphorus and VFA mixture supplied are up to a certain ratio. It is implied that the reason why PAOs isolated by traditional methods don＇t show the ability of accumulating phosphorus is due to the inappropriate conditions of substrates supplied.