厌氧颗粒污泥上浮原因与控制

Reasons and Control of Anaerobic Granular Sludge Floating

厌氧颗粒污泥性状的稳定对于高速厌氧反应器运行效果是至关重要的。在颗粒污泥的形成阶段,运行条件的不适当易导致丝状菌引起的污泥膨胀上浮和流失。因此,运行时应保持合适的有机负荷和较高的上升流速。在颗粒污泥形成后,负荷剧变、二次启动、污泥中毒、EPS的影响都可能会引起厌氧颗粒污泥上浮的出现,根据引发的原因,文章也给出了相应的预防和控制策略。

The stability of anaerobic granular sludge is very important for the operation of high-rate anaerobic reactors.In the formation stage of granular sludge,the improper operation condition may lead to sludge bulking,floating and loss,which arise from filamentous bacteria.Therefore,proper organic loading and higher upflow velocity should be maintained at the time of operation.After the formation of granular sludge,load shake-up,secondary start-up,sludge poisoning and EPS may cause the floating of anaerobic granular sludge.Moreover,according to the causes,the corresponding prevention and control strategies are also given.