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Type: Artigo de periódico
Title: Integrated Treatments For Metalworking Effluent: Chemistry Precipitation And Biotreatment In Air-lift Reactor Type [tratamentos Integrados Em Efluente Metal-mecânico: Precipitação Química E Biotratamento Em Reator Do Tipo Air-lift]
Author: Queissada D.D.
da Silva F.T.
de Paiva T.C.B.
Abstract: The objectives of this paper were: to perform the physical-chemical characterization of a metalworking effluent and to carry out the integrated treatment (chemical precipitation and biotreatment), using effluent autochthonous microorganisms (FI and FV) and a reference (A. niger). The characterization indicated pH of 1.7; color, 1,495 mg Pt.L-1; chemical oxygen demand, 9,147 mgO 2.L -1; oil and grease, 887 mg.L -1, and dissolved oxygen with 2.5 mgO 2.L -1. With the chemical precipitation treatment, in pH = 7.5, the reduction of all the investigated metallic ions was obtained. The color was reduced 95% after the biotreatment using the FV microorganism. The chemical oxygen demand and oil and grease reductions were more significant when using FI, which reduced the same in 52 and 62%, respectively. These results indicated that the autochthonous microorganisms were more efficient in the effluent treatment than the reference organism A. niger.
Rights: aberto
Identifier DOI: 10.1590/S1413-41522011000200012
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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