%0 Journal Article
%T Tratamentos integrados em efluente metal-mecanico: precipita£¿£¿o qu¨ªmica e biotratamento em reator do tipo air-lift
%A Queissada
%A Daniel Delgado
%A Silva
%A Fl¨¢vio Teixeira da
%A Paiva
%A Teresa Cristina Brazil de
%J Engenharia Sanitaria e Ambiental
%D 2011
%I Brazilian Association of Sanitary and Environmental Engineering
%R 10.1590/S1413-41522011000200012
%X 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 mgo2.l-1; oil and grease, 887 mg.l-1, and dissolved oxygen with 2.5 mgo2.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.
%K chemical precipitation
%K air-lift reactor type
%K metalworking effluent.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1413-41522011000200012&lng=en&nrm=iso&tlng=en