What type of floc particles often causes severe carryover of sludge solids?

Magnesium hydroxide floc particles are associated with causing severe carryover of sludge solids due to their composition and behavior during the flocculation process. When magnesium hydroxide is added to water treatment processes, it can create larger, less dense flocs that do not settle effectively. This characteristic makes them more prone to being carried over with the effluent, leading to sludge solids being present in the treated water.

In contrast, other types of floc particles may behave differently in terms of settling and density. For instance, cationic floc particles and polyaluminum chloride floc particles generally form more stable and denser flocs, which can settle out more effectively and reduce the risk of carryover. Similarly, calcium carbonate floc particles have a higher tendency to settle because of their density and the way they interact with other solids. Therefore, magnesium hydroxide's unique properties make it more likely to cause issues with sludge carryover during water treatment processes.