Effect of the exogenous autoinducers on the anaerobic ammonium oxidation (anammox)
ZHANG Xiang-hui, PENG Yong-zhen, JIA Fang-xu, HAN Jin-hao, MA Bin, HE Yang
Engineering Research Center of Beijing, National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China
Abstract：Nowadays, the anaerobic ammonium oxidation (anammox) process becomes a promising new way of removing nitrogen from wastewater. However, the performance of nitrogen removal is easy to be affected by sludge washout due to the extremely long doubling time of anammox bacteria (AnAOB). As a representative autoinducer of quorum sensing (QS) system, N-acyl-homoserine lactones (AHLs) may regulate the expression of certain genes involved in anammox reaction. Previous researches have indicated that C6-HSL and C8-HSL (two types of AHLs) could stimulate biofilm formation. Therefore, this study mainly focuses on the effect of the exogenous autoinducers (C6-HSL and C8-HSL) on anammox performance. The results showed that the growth of AnAOB was inhibited at AHLs concentration of 0.5g/L, however, the nitrogen removal rate could be enhanced by inducing hzsA gene expression in the presence of both C6-HSL and C8-HSL. Moreover, higher expression level of hzsA gene in AnAOB was induced by the amendment of C8-HSL than C6-HSL at the same concentration level.
张向晖, 彭永臻, 贾方旭, 韩金浩, 马斌, 何洋. 外源自诱导物对厌氧氨氧化的影响[J]. 中国环境科学, 2018, 38(5): 1727-1733.
ZHANG Xiang-hui, PENG Yong-zhen, JIA Fang-xu, HAN Jin-hao, MA Bin, HE Yang. Effect of the exogenous autoinducers on the anaerobic ammonium oxidation (anammox). CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(5): 1727-1733.
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