Traitement des effluents vinicoles, station d'épuration traditionnelle ou à géométrie variable, deux cas typiques

VILLE SUR ARCE has choosen for its winery wastewaters treatment (including lees and sediments) a new process. This one includes a long time storage (6-10 months) followed by an activated sludge. Four years of running show a good efficiency of the system in spite of an important pollution overload (150 % ). Epuration rates are over 98 % for BOD5. Long time storage doesn't produce any odour because natural acidification stops biological activity. TAIN L'HERMITAGE has decided in 1990 to treat his domestic and winery wastewater with a variable geometry treatment plant. STEREAU design, combines two biological stages with trickling filter SESSIL (high load) followed by a classical activated sludge (weak load). The trickling filter starts during pollution peaks (vintage). It eliminate 70 % of DOC and allows a constant load on activated sludge. The global epuration rates are over 95 % and treated water is conforming to e NK2 level. Three years of running have demonstrated the interest of this two stages treatment plant for an easy operation and high performances. / Pour répondre aux problèmes de traitement d'effluents vinicoles, SAUR et STEREAU ont développé 2 procédés de traitement originaux : une filière associant un traitement par lit bactérien "forte charge" à une boue activée ; une station traditionnelle précédée d'un stockage longue durée des effluents. Ces deux procedés sont décrits de manière détaillée dans cette communication.