Abstract in english (résumé en anglais)

Sewage sludge spreading is a agricultural way to "employ" these wastes, which moreover is 3 times less money consuming than actual way used by Castellane municipality. But high annoyance generated by spreading leads Castellane to transport its sludges far away from its tourists. And our problem is that our small commune (100 h) is designed to be spread with Castellane (up to 50 000 tourists a day) shit, that means 540 tons/year. Furthermore, opposite between money driven farmers and lambruissian land proprietaries that dont want to be polluted leads to high level tensions between them.