Volume 20, Issue 2, May 2017, Pages 724–730
M. Lakhlifi1, Omar El Rhaouat2, Driss Belghyti3, and Khadija El Kharrim4
1 Laboratoire de Biotechnologie, Environnement et Qualité. Faculté des Sciences, Université Ibn Tofail, BP 133, Morocco
2 Laboratoire Environnement et Energies Renouvelables, Faculté des Sciences, Université Ibn Tofail, B.P: 133, 14000 Kénitra, Morocco
3 Laboratoire Environnement et Energies Renouvelables, Faculté des Sciences, Université Ibn Tofail, B.P: 133, 14000 Kénitra, Morocco
4 Laboratoire Environnement et Energies Renouvelables, Faculté des Sciences, Université Ibn Tofail, B.P: 133, 14000 Kénitra, Morocco
Original language: French
Copyright © 2017 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This study aims to evaluate the performance of the sewage treatment plant of the lagunage type with activated sludge located in the town of Skhirat of the area Rabat-Sale-Kenitra in the vicinity of the Atlantic Ocean. Sampling was carried out monthly during the year 2013 follow- up by specific physicochemical analyses in terms of the chemical demand for oxygen (DCO), the biological request oxygenates of them (DBO5) and suspended matter measures it (SM). These parameters are measured at the laboratory by the device DCOmétre, DBOmétre as well as SM by a cellulose membrane filter. On the level of this sewage treatment plant, the output acquired in terms of DCO, DBO5 and SM is respectively of annual percentage average of about 87,26%, 88,35% and 68,37% what is very significant on the level downstream of this STEP and conforms to the national standards and international ; this is confirmed by the Test t unilateral for two matched samples represented by one p-value 0.0001 significant for the difference between the averages of entry and exitof the STEP. As well as the ratios of DCO/DBO5 and DBO5/DCO, indicate to us that the biodegrad ability is not difficult, represented respectively by values of about 2,05 and 0,49 what means what means that thisstation uses a kind of satisfactory biological treatment.
Author Keywords: Waste waters, physicochemistry, performance, STEP Skhirat, Morocco.
M. Lakhlifi1, Omar El Rhaouat2, Driss Belghyti3, and Khadija El Kharrim4
1 Laboratoire de Biotechnologie, Environnement et Qualité. Faculté des Sciences, Université Ibn Tofail, BP 133, Morocco
2 Laboratoire Environnement et Energies Renouvelables, Faculté des Sciences, Université Ibn Tofail, B.P: 133, 14000 Kénitra, Morocco
3 Laboratoire Environnement et Energies Renouvelables, Faculté des Sciences, Université Ibn Tofail, B.P: 133, 14000 Kénitra, Morocco
4 Laboratoire Environnement et Energies Renouvelables, Faculté des Sciences, Université Ibn Tofail, B.P: 133, 14000 Kénitra, Morocco
Original language: French
Copyright © 2017 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
This study aims to evaluate the performance of the sewage treatment plant of the lagunage type with activated sludge located in the town of Skhirat of the area Rabat-Sale-Kenitra in the vicinity of the Atlantic Ocean. Sampling was carried out monthly during the year 2013 follow- up by specific physicochemical analyses in terms of the chemical demand for oxygen (DCO), the biological request oxygenates of them (DBO5) and suspended matter measures it (SM). These parameters are measured at the laboratory by the device DCOmétre, DBOmétre as well as SM by a cellulose membrane filter. On the level of this sewage treatment plant, the output acquired in terms of DCO, DBO5 and SM is respectively of annual percentage average of about 87,26%, 88,35% and 68,37% what is very significant on the level downstream of this STEP and conforms to the national standards and international ; this is confirmed by the Test t unilateral for two matched samples represented by one p-value 0.0001 significant for the difference between the averages of entry and exitof the STEP. As well as the ratios of DCO/DBO5 and DBO5/DCO, indicate to us that the biodegrad ability is not difficult, represented respectively by values of about 2,05 and 0,49 what means what means that thisstation uses a kind of satisfactory biological treatment.
Author Keywords: Waste waters, physicochemistry, performance, STEP Skhirat, Morocco.
Abstract: (french)
Cette étude a pour objectif d’évaluer la performance de la station d’épuration de type lagunage à boues activées située dans la ville de Skhirat de la région Rabat-Salé-Kenitra au voisinage de l’océan atlantique. L’échantillonnage a été réalisé mensuellement au cours de l’année 2013 suivi par des analyses physico-chimiques spécifiques en termes de la demande chimique en oxygène (DCO), la demande biologique en oxygène (DBO5) et la mesure de la matière en suspension (MES). Ces paramètres sont mesurés au laboratoire par l’appareil DCOmétre, le DBOmétre ainsi que la MES par un filtre membranaire cellulosique. Au niveau de cette station d’épuration, le rendement acquis en termes de DCO, DBO5 et MES est respectivement de pourcentage moyen annuel de l’ordre de 87,26 %, 88,35 % et 68,37 % ce qui est très significatif au niveau aval de cette STEP et conforme aux normes nationales et internationales ; ceci est confirmé par le Test t unilatéral pour deux échantillons appariés représenté par une p-value 0,0001 significative pour la différence entre les moyennes d’entrée et de sortie de la STEP. De plus les ratios de DCO/ DBO5 et DBO5/DCO, nous indiquent que la biodégradabilité n’est pas difficile, représentés respectivement par des valeurs de l’ordre de 2,05 et 0,49 ce qui signifie que cette station utilise un type de traitement biologique satisfaisant et plus performant.
Author Keywords: Eaux usées, physico-chimie, performance, STEP Skhirat, Maroc.
How to Cite this Article
M. Lakhlifi, Omar El Rhaouat, Driss Belghyti, and Khadija El Kharrim, “Evaluation de la performance d’une station d’épuration de type lagunage à boues activées : Cas de la STEP Skhirat, Maroc,” International Journal of Innovation and Applied Studies, vol. 20, no. 2, pp. 724–730, May 2017.
