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Last edited 16 Sep 2021
The term sludge (or slurry) refers to a range of semi-solid/semi-liquid substances or deposits. In the United States, sewage sludge is sometimes referred to as septage (when associated with sludge from septic tanks).
 Types of sludge
Sludge can also be generated by activities such as industrial wastewater treatment using biological or chemical processes. Industrial sludge can sometimes be produced in solid form, such as sewage sludge from wastewater treatment or faecal sludge from pit latrines and septic tanks.
 Managing sludge
Food and beverage sludge can sometimes be converted into animal feed.
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