Sludge
Sludgeis a semi-solidslurrythat can be produced from a range of industrial processes, fromwater treatment,wastewater treatmentor on-sitesanitationsystems. It can be produced as a settled suspension obtained from conventionaldrinking water treatment,[1]assewage sludgefrom wastewater treatment processes[2]: 23–25 or asfecal sludgefrompit latrinesandseptic tanks.The term is also sometimes used as a generic term for solids separated from suspension in a liquid; this soupy material usually contains significant quantities of interstitial water (between the solid particles). Sludge can consist of a variety of particles, such as animal manure.[3][not specific enough to verify]
Industrial wastewater treatmentplants produce solids that are also referred to as sludge. This can be generated from biological or physical-chemical processes.
In theactivated sludgeprocess for wastewater treatment, the terms "waste activated sludge" and "return activated sludge" are used.
Infood processingand beverage-making industries, sludge can have a high protein content and can contain other nutrients that can be used for beneficial purposes such as processing for animal feed; this avoids having to dispose of the sludge at alandfill.
References
[edit]- ^Edzwald, James K., ed. (2011).Water Quality and Treatment(6th ed.). McGraw-Hill.ISBN978-0-07-163011-5.
- ^Tchobanoglous, George; Burton, Franklin Louis; Stensel, H. David; Metcalf & Eddy (2003).Wastewater Engineering: Treatment and Reuse(4th ed.). McGraw Hill.ISBN9780071122504.
- ^Byfield, Mike (July 7, 1997). "Farmers line up for their slug of pulp sludge".Alberta Newsprint Co.
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