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 (3.0-4.5). In this study, the treatment of tequila vinasse was achieved by a flocculation-coagulation process using poly-γ-glutamic acid (PGA). Results showed that the use of PGA (250-300 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 2.5-3.5 and a temperature of 30-55°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.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Carvajal-Zarrabal O,Nolasco-Hipólito C,Barradas-Dermitz DM,Hayward-Jones PM,Aguilar-Uscanga MG,Bujang Kdoi
10.1016/j.jenvman.2011.05.001subject
Has Abstractpub_date
2012-03-01 00:00:00pages
S66-70eissn
0301-4797issn
1095-8630pii
S0301-4797(11)00136-8journal_volume
95 Supplpub_type
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