Effect of sludge age on heavy metal biosorption by selector activated sludge
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Date
2008
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Publisher
Inderscience Enterprises
Abstract
The influence of sludge age on the metal biosorption characteristics of an aerobic selector-activated sludge was investigated. Two bench-scale aerobic-activated sludge systems were operated at sludge ages of 5 days and 15 days for studying biosorption of Cu and Cr(VI). In-vitro batch experiments were performed to compare biosorption characteristics of the sludge samples harvested from the bench-scale systems. Adsorption capacity (k) of the sludge for both of the metals was found to decrease with increasing sludge age from 5 days to 15 days However, percent removals of the metals were variable in relation to sludge age. Although Cr(VI) removal increased from 33% to 68%, Cu removal exhibited a slight decrease from 81% to 74% with increasing sludge age.
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Keywords
Environmental sciences & ecology, Activated sludge, Aerobic selector, Biosorption, Copper, Heavy metals, Hexavalent chromium, Sludge age, Activated sludge systems, Adsorption capacities, Aerobic selector, Bench-scale system, Hexavalent chromium, Metal biosorption, Sludge age, Sorption, Chromium compounds, Bacterial extracellular polymers, Stability-constants, Retention time, Removal, Culture
Citation
Alkan, U. vd. (2008). "Effect of sludge age on heavy metal biosorption by selector activated sludge". International Journal of Environment and Pollution, 34(1-4), 400-411.