Chemical Conditioning of Activated Sludge

by John T. Novak, (M.ASCE), Prof. of Civ. Engrg.; Univ. of Missouri-Columbia, Columbia, Mo.,
Bjorn-Erik Haugan, Research Civ. Engr.; Norwegian Inst. for Water Research, Oslo, Norway,

Serial Information: Journal of the Environmental Engineering Division, 1979, Vol. 105, Issue 5, Pg. 993-1008

Document Type: Journal Paper


Activated sludge flocs may be represented as matrices to which anionic particles are weakly adsorbed. A sludge becomes optimally conditioned when the unadsorbed anionic particles are coagulated through adsorption or charge neutralization. Because the anionic particles are readily desorbed, the required dosage of conditioning polymers is found to increase with mixing time and intensity. While sludges conditioned under intense mixing conditions require additional conditioning chemicals, they are found to be more resistant to deterioration or disruption.

Subject Headings: Particles | Chemicals | Activated sludge | Matrix (mathematics) | Coagulation | Adsorption | Polymer | Materials processing

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