| abstract |
The invention discloses a method for controlling the bulking of filamentous sludge based on quorum sensing. It belongs to the technical field of filamentous sludge bulking control. The steps of the method are to run the activated sludge reactor and collect activated sludge samples, determine the degree of sludge bulking and the type of sludge bulking, and carry out Gram staining and Neisser staining to identify the factors that cause filamentous sludge bulking. Dominant filamentous bacteria, determine the type and content of N-acylated homoserine lactones (AHLs) signal molecules, carry out correlation analysis to determine the AHLs signal molecules that are negatively correlated with filamentous sludge bulking, add the determined AHLs Signal molecules are sent to the activated sludge reactor, thereby realizing the control of filamentous sludge bulking in the activated sludge reactor. The invention is simple and easy to operate, can quickly reduce or eliminate negative effects such as sludge settling difficulty and effluent quality deterioration caused by sludge bulking, and improve the operation stability and operation safety of the existing sewage treatment plant. |