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Vacuum evaporation of waste oil-in-water emulsions from a copper metalworking industry / Gemma Gutiérrez in Industrial & engineering chemistry research, Vol. 48 N°4 (Février 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2100–2106 Titre : Vacuum evaporation of waste oil-in-water emulsions from a copper metalworking industry Type de document : texte imprimé Auteurs : Gemma Gutiérrez, Auteur ; José M. Benito, Auteur ; José Coca, Auteur Année de publication : 2009 Article en page(s) : p. 2100–2106 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Vacuum  evaporation  Waste  oil-in-water  Copper  metalworking  industry Résumé : The performance of vacuum evaporation was evaluated for the treatment of waste oil-in-water (O/W) emulsions, one synthetic (Multiroll) and two semisynthetic (Unopol and Divinol), used in a copper metalworking industry. A destabilization/settling pretreatment step using Nalco 71243 (NAL, a quaternary polyamine) as flocculant and CaCl2 and AlCl3·6H2O as coagulants was also investigated. The quality of the final aqueous effluent was evaluated in terms of chemical oxygen demand (COD), turbidity, conductivity, and biological oxygen demand (BOD5). COD reduction greater than 99% was achieved. The pretreatment step did not significantly improve either the evaporation rate or the quality of the condensate. Moreover, evaporation of a totally exhausted Unopol waste emulsion carried out in an industrial falling film evaporator showed good agreement with results obtained at the laboratory scale. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801054d [article] Vacuum evaporation of waste oil-in-water emulsions from a copper metalworking industry [texte imprimé] / Gemma Gutiérrez, Auteur ; José M. Benito, Auteur ; José Coca, Auteur . - 2009 . - p. 2100–2106. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2100–2106 Mots-clés : Vacuum  evaporation  Waste  oil-in-water  Copper  metalworking  industry Résumé : The performance of vacuum evaporation was evaluated for the treatment of waste oil-in-water (O/W) emulsions, one synthetic (Multiroll) and two semisynthetic (Unopol and Divinol), used in a copper metalworking industry. A destabilization/settling pretreatment step using Nalco 71243 (NAL, a quaternary polyamine) as flocculant and CaCl2 and AlCl3·6H2O as coagulants was also investigated. The quality of the final aqueous effluent was evaluated in terms of chemical oxygen demand (COD), turbidity, conductivity, and biological oxygen demand (BOD5). COD reduction greater than 99% was achieved. The pretreatment step did not significantly improve either the evaporation rate or the quality of the condensate. Moreover, evaporation of a totally exhausted Unopol waste emulsion carried out in an industrial falling film evaporator showed good agreement with results obtained at the laboratory scale. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801054d