True or False: Sludge produced by a solids-contact clarification unit is recycled to act as a coagulant aid?

The statement that sludge produced by a solids-contact clarification unit is recycled to act as a coagulant aid is indeed accurate. In solids-contact clarification processes, the sludge, which contains a concentrated amount of coagulated particles and floc, can be returned to the system. This recycling enhances the efficiency of the coagulation and flocculation processes by providing additional activated material that aids in the removal of suspended solids and improves overall settling.

Recycling this sludge allows for better use of the coagulant, as it helps in forming larger and denser flocs, leading to improved sedimentation characteristics. Additionally, this practice supports the principles of sustainable water treatment by minimizing waste and promoting the reuse of materials within the system. By leveraging the properties of the recycled sludge, water treatment facilities can optimize performance and achieve better treatment outcomes.