http://www.yokogawa.com/success/ Executive Summary Constructed in 1987, the GEOLIDE wastewater puri- fication plant treats up to 220,000 m 3 of wastewater per day (86 million m 3 per year) for the city of Marseille (population 1,860,000) and 16 towns in the surrounding area. The plant has been operated since 2001 by Seramm, which is a subsidiary of the French water supply and wastewater treatment company Lyonnaise des Eaux.

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