Resumo

GUTIERREZ-ROSERO, Johnatan Alberto et al. Treatment of waterworks sludge from conventional process to drinking water. Rev. ing. univ. Medellín [online]. 2014, vol.13, n.25, pp.13-27. ISSN 1692-3324.

Waterworks sludge from sedimentation process in conventional drinking water treatment plant, recovery tests under aluminum adding H₂SO₄, thickening and settling properties were investigated. Using H₂SO₄, was recovered 60-70% of the initial concentration of aluminum in the sludge, and pH=1.5 Und mixture 5-30 minutes. For testing the settleability and thickening Nalclear 8173 and Trafloc 496 polymers were used. With a significance level of 0.05, the settling properties significant for SST and turbidity removal was obtained; there were no significant differences between the polymers; dose efficiencies presented significant removal was 10 mg/L. In thickening, adding Trafloc and the time factor influenced significantly on removal efficiencies of COD, BOD, TSS and turbidity; there were no significant differences between the doses of polymer used. The settleability provided best technical conditions for the treatment of sludge tested.

Palavras-chave : waterworks sludge; aluminum recovery; polymers; settleability; thickening.

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