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Environmental Friendly Transformation of the First and Oldest Alumina Refinery in the World
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NETL
Springer Nature
Since 2006， Alteo Gardanne Alumina Refinery has launched a significant environmental program to improve its management of bauxite residue as well as wastewater disposal。 Red mud from bauxite residue had been sent to the 'Fosse de Cassidaigne'， a trench in the Mediterranean Sea via a 55 km long pipe， for 50 years。 Due to ever improving environmental standards and the need to adhere to new regulations， Alteo rethought its methodology by implementing 3 major operational changes: 1。 Red mud bauxite residue dehydration with press filters (from 2006) in order to directly stack the residue in a small dedicated area， 4 km away from the refinery 2。 Suspended solid elimination in wastewater still discharged to the sea with pressure filter technology (since 2016) 3。 Waste water pH reduction and dissolved metal removal， in particular aluminum and arsenic， by CO_2 neutralization process (planned for 2019) with precipitated solid recycling in the Bayer process。 Further improvements are already under investigation， and will be presented as a conclusion of this environmental friendly transformation of the first and oldest alumina refinery in the world。
Bauxite residueCarbon dioxide neutralizationFiltration aid
Laurent Bonel、Philippe Clerin、Laurent Guillaumont
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ALTEO Gardanne, Route de Biver-B.P. 62, 13541 Gardanne Cedex, France
NETL
Springer Nature
