Treatment of vinasse from tequila production using polyglutamic acid

Octavio, Carvajal-Zarrabal and Cirilo, Nolasco-Hipolito and Dulce, Barradas-Dermitz and Patricia M., Hayward-Jones and Guadalupe, Aguilar-Uscanga and Kopli, Bujang (2011) Treatment of vinasse from tequila production using polyglutamic acid. Journal of Environmental Management 95 (2012) S66-S70.

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Abstract

Vinasse, the wastewater from ethanol distillation, is characterised by high levels of organic and inorganic matter, high exit process temperature (ca. 90 _C) and low pH (3.0e4.5). In this study, the treatment of tequila vinasse was achieved by a flocculationecoagulation process using poly-g-glutamic acid (PGA). Results showed that the use of PGA (250e300 ppm) combined with sodium hypochlorite and sand filtration managed to remove about 70% of the turbidity and reduced chemical oxygen demand (COD) by 79.5% with the extra benefit of colour removal. PGA showed its best flocculating activity at pH 2.5e3.5 and a temperature of 30e55 _C. Such a treatment may be a solution for small tequila companies for which other solutions to deal with their vinasse may not be economically affordable.

Item Type: Article
Additional Information: Universiti Malaysia Sarawak, UNIMAS
Subjects: A General Works > AC Collections. Series. Collected works
A General Works > AC Collections. Series. Collected works
Divisions: Academic Faculties, Institutes and Centres > Faculty of Resource Science and Technology
Depositing User: Karen Kornalius
Date Deposited: 08 May 2014 07:52
Last Modified: 14 Apr 2016 06:01
URI: http://ir.unimas.my/id/eprint/2387

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