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Información tecnológica

On-line version ISSN 0718-0764


MORENO, Hilda A; DROPPELMANN, Carmen V  and  VERDEJO, María E. Production and Evaluation of Activated Carbon from Sludge Generated in a Sewage Treatment Plant. Inf. tecnol. [online]. 2006, vol.17, n.3, pp.9-14. ISSN 0718-0764.

This study evaluated the activated carbon produced from the sludge generated in a sewage treatment plant. The sewage sludge used came from an extended aeration plant, and the transformation was carried out by means of a process of chemical activation with zinc chloride and pyrolysis. Pyrolysis was done at different temperatures (550, 600, 650°C) and times (30, 45 and 60 minutes). The yield of the carbon obtained fluctuated between 42% and 66%, with the highest yield recorded at 550°C. The adsorption capacity for the activated charcoal obtained, evaluated by means of the constant of linear adsorption for the dye crystal violet, fluctuated between 0,05 and 0,132 L/g. According to this, the best charcoal was obtained when pyrolysis temperature was 650°C. The effect of the pyrolysis time on the constant of linear adsorption was not statistically significant.

Keywords : activated carbon; sewage sludge; adsorption; chemical activation.

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