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Synthetic sludge: A physical/chemical model in understanding bioflocculation
Date
1996-07-01
Author
Sanin, Faika Dilek
Vesilind, PA
Metadata
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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We postulate a mechanism for flee formation and demonstrate its feasibility by building synthetic sludge flocs. In this work, polystyrene latex particles of a size similar to bacteria are used to simulate individual bacteria; alginate, a polysaccharide, is used to simulate microbial extracellular polymers; and calcium ions are used as the bridging cations. Calcium and alginate are added at typical concentration ranges relative to the amount of microorganisms existing iii wastewater treatment biological sludges. Flocs are formed almost instantly by the addition of calcium ions and are observed to be remarkably similar to the activated sludge flocs in physical appearance. Roc formation is faster at higher calcium concentrations. Higher alginate and calcium concentrations always ensure lower turbidities indicating better flee forming abilities.
Subject Keywords
Alginate
,
Sludge
,
Bioflocculation
,
Calcium
,
Extracellular polymers
URI
https://hdl.handle.net/11511/39968
Journal
WATER ENVIRONMENT RESEARCH
DOI
https://doi.org/10.2175/106143096x127938
Collections
Department of Environmental Engineering, Article