Landwirtschaftliche Anwendung
Sludge is a semi-liquid mass removed from the liquid
flow of sewage. Domestic sewage containing more than
20% solid is also called sludge. The solids may contain
nutrient and toxic elements, depending on the source of
the sludge and its treatment.
Sludge is disposed of by burning and burying it, or by
adding it to water or soil. The preferred choice is to
incorporate sludge into the soil, since this method does
not pollute water. Disposal is more common than sludge
utilization because of the potential health hazards, high
transporting cost and low fertiliier value. Heavy metal
con taminants are also a matter of concern.
A potential use of sludge is in mine spoil reclamation.
The sludge disposal can be done in soils having clay and
organic content.
