同©大学 Tongji University Description Sedimentation or Settling is employed for the removal of suspended solids that are heavier than water by gravity separation, such as the removal of grit,Total Suspended Solid (TSS)in primary settling basins,biological floc in activated sludge basin,and chemical floc when chemical flocculation is used. Sedimentation is the most widely used physical process in water treatment,with low cost,simple maintenance,and high efficiency.It may appear more than once in a treatment flow chart. Another kind of sedimentation is Accelerated Gravity Settling which removes particle in an accelerated flow field.but,it is not widely used.Tongji University Description • Sedimentation or Settling is employed for the removal of suspended solids that are heavier than water by gravity separation, such as the removal of grit, Total Suspended Solid (TSS) in primary settling basins, biological floc in activated sludge basin, and chemical floc when chemical flocculation is used. • Sedimentation is the most widely used physical process in water treatment, with low cost, simple maintenance, and high efficiency. It may appear more than once in a treatment flow chart. • Another kind of sedimentation is Accelerated Gravity Settling which removes particle in an accelerated flow field. but, it is not widely used