Current technology is limited in its ability to produce a water‐treatment‐plant sludge of such concentration that it can be effectively handled. The authors have sought to remedy the situation.
Water‐treatment processes remove impurities from ground water and surface water. The result of treatment, however, is a form of sludge that must be disposed of properly. Disposal of this sludge constitutes a problem for plant operators. But if the volume of sludge can be reduced prior to treatment, then the problem of disposal can be accomplished more readily.
Aluminum sulfate (alum) sludge, usually discharged into streams, must now, under current guidelines, be treated as a concentrated pollutant. This article examines the filtration possibilities of alum and offers some interesting new observations.
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