activated sludge floc的用法和样例：
- To gain a good settleability, good activated sludge floc must be formed first of all.
- In the text,the forming process and the microbial ecology of the activated sludge floc in SBR(sequencing batch reactor) were observed and studied.
- The influence mechanism of the hydrodynamic shear stress was analyzed by comparison of the morphological characteristics of activated sludge floc and the types of microorganism.
- The resulting microbial floc (activated sludge) is settled in a sedimentation vessel called a clarifier or thickener.