❞ كتاب WASTE WATER TREATMENT chap 10 ❝

WASTE WATER
TREATMENT
chap 10
European Green Capital Award Nantes 2012 2013
149





European Green Capital Award Nantes 2012 2013
150
10 A
Present situation.
Waste water in the Nantes metropolitan area (575,000 h) is treated in
twelve purifi cation plants, with capacities that vary from 1,200 inhabitant
equivalent (Vertou – Pégers Reigners) to 600,000 inhabitant equivalent
(Vallée de Tougas - Nord Loire). Together, they have a total capacity of
780,000 inhabitant equivalent, which will increase to 840,000 population
equivalent when the updated biological treatment process at the Petite
Californie (Sud Loire) purifi cation plant comes into service (at the end of
2010).
This capacity means that expansion of the metropolitan area presents no fears and industrial waste-water
discharges containing biodegradable effl uent can be treated (102 agreements signed in 2009, 477 authorisations,
2,094 fi les opened). There is systematic and regular monitoring of industrial discharges. In addition,
waste water from villages far removed from the transfer networks is treated by nine semi-public treatment
plants.







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من الهندسة المدنية - مكتبة كتب الهندسة والتكنولوجيا.