ABSTRACT
When sludges with different percent solids content are mixed, the resulting sludge has a percent solids content somewhere between the solids contents of the original sludges. For example, if a 4% primary sludge is mixed with a 1% secondary sludge, the resulting sludge might have a solids content of about 2 or 3%. The actual percent solids content will depend on how much (lbs) of each sludge is mixed together. If, in the example, most of the sludge is from the secondary sludge (1% solids) and very little fiom the primary sludge (4% solids), then the resulting sludge would be closer to a 1 % sludge (perhaps a 1 .S% sludge). If, on the other hand, most of the sludge is prknary sludge and very little is secondary sludge, then the resulting sludge mixture might have a solids content closer to 4%-such as 3 or 3.5%.
