dewatered sludge can be disposed of by burial in a landfill or by
Landfills which receive sludge must be designed to prevent contamination
of nearby surface or groundwater supplies. The gases and particles
produced in incineration must be collected as well to protect air
dewatered sludge is also applied to agricultural land and made available
to the pubic for personal use as a soil conditioner and fertilizer.
This disposal option requires that the sludge be treated to reduce
(for agricultural use) or eliminate (for public use) pathogens.
Sludges treated in this manner are called biosolids
and their application is controlled to protect the public health