CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China.
CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China.
Water Res. 2020 Jul 15;179:115904. doi: 10.1016/j.watres.2020.115904. Epub 2020 May 6.
Involvements of quorum sensing (QS) in the formation of aerobic granules for wastewater treatment have been well recognized. In previous studies the evolution of the QS-related activities and communities during bioreactor start-up period has been extensively studied, while the variation of QS in long-term reactor operation remains unrevealed. Furthermore, information about the roles of quorum quenching (QQ) in bioreactors is very limited. In this work, both QS and QQ during the start-up and successive long-term operation period of an aerobic granule bioreactor were explored. The QS activity and communities increased in the start-up but gradually decreased in the long-term operation, while the QQ activity and communities remained stable. These results indicate the longer persistence of QQ than QS in the granules and the minor contribution of QS in the long-term operation. This work provides a new insight into the roles of QQ and QS in wastewater treatment bioreactors.
群体感应（QS）在好氧颗粒污泥形成中的作用已得到充分认识。在以前的研究中，生物反应器启动期间与 QS 相关的活性和群落的演变已经得到了广泛的研究，而长期反应器运行中 QS 的变化仍未被揭示。此外，关于生物反应器中群体淬灭（QQ）作用的信息非常有限。在这项工作中，研究了好氧颗粒生物反应器启动和随后的长期运行期间的 QS 和 QQ。QS 活性和群落增加了在启动，但在长期运行中逐渐减少，而 QQ 活性和群落保持稳定。这些结果表明，QQ 在颗粒中的持久性比 QS 更长，并且 QS 在长期运行中的贡献较小。这项工作为 QQ 和 QS 在废水处理生物反应器中的作用提供了新的见解。
