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Heavy Metal Removal by Acclimated Activated Sludge

Ronald D. Neufeld and Edward R. Hermann
Journal (Water Pollution Control Federation)
Vol. 47, No. 2 (Feb., 1975), pp. 310-329
Stable URL: http://www.jstor.org/stable/25038631
Page Count: 20
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Heavy Metal Removal by Acclimated Activated Sludge
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Abstract

Activated sludge that is acclimated to levels of mercury, cadmium, and zinc of up to 1,000 mg/l has been shown effective in the simultaneous removal of heavy metals and organic substrate. Biomass production and respiration parameters and Monod-type kinetic parameters are evaluated as a function of the metal: sludge ratio. Initial metal uptake on sludge is rapid, a plateau being reached in about 3 hr. The ultimate metal equilibria between the liquid and floc phases resemble a Freundlich isotherm, indicating weight concentration factors of heavy metals on activated sludge in the range of 4,000 to 10,000 times. It is concluded that activated sludge represents a rational process alternative for industry in the on-site pretreatment of organic wastes contaminated by heavy metals.

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