Ok for the waste water 500m3 ...

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Ok for the waste water 500m3 to treat. Which is the origin of their production? Domesticity, industrialist, restoration? How much people produce these waste water 500m3? These waste waters come they from a system gathering the collection of waste waters of a zone: - Rural? - Urban? Are the 500m3 they final or they will grow bigger in time? Can one estimate that it is the production of a residential area of 5000 people approximately?