Vacuum Evaporation of Waste Oil-in-Water Emulsions from a Copper Metalworking Industry

被引：20
|
作者：
Gutierrez, Gemma [1 ]
Benito, Jose M. [2 ]
Coca, Jose [1 ]
Pazos, Carmen [1 ]
机构：
[1] Univ Oviedo, Dept Chem & Environm Engn, Oviedo 33006, Spain
[2] Univ Burgos, Dept Chem Engn, Burgos 09001, Spain
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2009年 / 48卷 / 04期
关键词：
CONTAINING WASTEWATERS; CERAMIC MEMBRANES; ULTRAFILTRATION; SURFACTANTS; BEHAVIOR;
D O I：
10.1021/ie801054d
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
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 center dot 6H(2)O 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.
引用
收藏
页码：2100 / 2106
页数：7
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