Open AccessClarification and filtration of the floculated partuicles suspension from a chemical treatment of waste oil-in-water emulsions from a non-ferrous metalworking plant
Author(s) -
Vesna Lazarević,
Ivana Ilić Krstić,
Ljiljana Takić,
Miodrag L. Lazić,
Vlada B. Veljković
Publication year - 2011
Publication title -
hemijska industrija
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.147
H-Index - 19
eISSN - 2217-7426
pISSN - 0367-598X
DOI - 10.2298/hemind100801054l
Subject(s) - filtration (mathematics) , flocculation , lime , suspension (topology) , chemistry , chromatography , coagulation , emulsion , volume (thermodynamics) , pulp and paper industry , particle (ecology) , ferrous , microfiltration , materials science , membrane , metallurgy , organic chemistry , mathematics , biochemistry , psychology , statistics , physics , oceanography , quantum mechanics , homotopy , psychiatry , pure mathematics , engineering , geology
The effects of the coagulation/floculation conditions on clarification and filtration of the floculated particle suspension obtained by the chemical treatment of the waste oil-in-water emulsion (OWE) from a non-ferrous metalworking plant were studied. The treatment involved the addition of aluminum(III) sulfate and lime to the OWE. The main goal was to define the optimum conditions for clarification and filtration of the floculated particle suspension. The factors involved were amounts lime (i.e. pH) and filter aid added the OWE on clarification and filtration rates. At pH>10, the clarification rate was increased and the final volume of the concentrated suspension (sludge) was reduced, while filter aid affected negatively the clarification rate. The filtration rate was also increased when the coagulation was carried out at pH>10. The floculated particle suspension should be concentrated before filtration in order to decrease the filtration duration. The most efficient filter aid was Celite standard super-cel, its optimum initial concentration being found to be 2 g/dm3