Treatment of a waste oil-in-water emulsion from a copper-rolling process by ultrafiltration and vacuum evaporation

被引：55

作者：

Gutierrez, Gemma ^{[1
]}

Lobo, Alberto ^{[1
]}

Benito, Jose M. ^{[2
]}

Coca, Jose ^{[1
]}

Pazos, Carmen ^{[1
]}

机构：

[1] Univ Oviedo, Dept Chem & Environm Engn, E-33006 Oviedo, Spain

[2] Univ Burgos, Dept Chem Engn, Burgos 09001, Spain

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2011年 / 185卷 / 2-3期

关键词：

Waste O/W emulsion; Copper rolling; Destabilization; Ultrafiltration; Vacuum evaporation; DESTABILIZATION; CENTRIFUGATION; PH;

D O I：

10.1016/j.jhazmat.2010.10.088

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A process is proposed for the treatment of a waste oil-in-water (O/W) emulsion generated in an industrial copper-rolling operation. The use of demulsifier agents improves the subsequent treatment by techniques such as ultrafiltration (UF) or evaporation. The effluent COD is reduced up to 50% when the O/W emulsion is treated by UF using a flat 30 nm TiO2 ceramic membrane (Delta P=0.1 MPa) and up to 70% when it is treated by vacuum evaporation, after an emulsion destabilization pretreatment in both cases. Increases in the UF permeate flux and in the evaporation rate are observed when a chemical demulsifier is used in the pretreatment step. A combined process consisting of destabilization/settling, UF, and vacuum evaporation can yield a very high-quality aqueous effluent that could be used for process cooling or emulsion reformulation. (C) 2010 Elsevier B.V. All rights reserved.

引用

收藏

页码：1569 / 1574

页数：6

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