Etude Comparative Entre Deux Techniques D’epuration Des Eaux Usees (lagunage Aere Et Filtre Plante De Roseaux) Cas De La Region De Ouargla

Résumé: The work carried out is focused on efficiency and comparison of the results to be analyzed for a year 2019, in two wasterwater stations in the region of ouargla : the first one is installed in N’goussa and uses treatment by Filtre planted with reeds and the second one is installed in Said Otba and uses treatment by aerated lagoon. Analyses of different parameters were done at the laboratory of station Said Otba.The results show an efficiency of the techniques, but with contrast values.The results obtained for the water treated by filtre planted with reeds, were closedto the dicharge standards than those of the aerated lagoon treatment plant. The most important parameter, which showed the efficiency of both processes, was elimination of suspended solids (SS). The elimination of SS in the station of treatment by Filtre planted with reeds and in the station of treatment by lagoon were successively 61 % and 46%.As well as in the reduction of COD and BOD5,or we recorded yield values of around 78% in a filtre planted with reed versus 72% in aeeated lagoon for DCO.However for the DBO5 the yields are 73% in the said otba wastewater treatment and at the level of the N’goussa wastewater treatment where we obtained a maximum percentage of 85%.

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