[ Etude des performances épuratoires de la technique de Lagunage naturel de la station d'épuration des eaux usées domestique de la ville d'Azilal -MAROC- ]
Volume 13, Issue 3, November 2015, Pages 507–517
Youssef Azami Idrissi1, Nabil Darwesh2, Isslam BELHAILI3, Abdellah Lachheb ACHHEB4, Ali Alemad5, Khadija Elkharrim6, and Driss Belghyti7
1 Laboratoire d'Environnements et Energies Renouvelables, Faculté Des Sciences, Université Ibn Tofail de Kénitra, Morocco
2 Laboratoire d'Environnements et Energies Renouvelables, Faculté Des Sciences, Université Ibn Tofail de Kénitra, Morocco
3 Laboratoire d'Environnements et Energies Renouvelables, Faculté Des Sciences, Université Ibn Tofail de Kénitra, Morocco
4 Laboratoire de Procédés de Séparation, Département de chimie, Faculté des Sciences, Université Ibn Tofail– Kénitra, Morocco
5 Laboratoire d'Environnements et Energies Renouvelables, Faculté Des Sciences, Université Ibn Tofail de Kénitra, Morocco
6 Department of Biology, Ibn Tofail University, Faculty of Sciences, Environment and Renewable Energy Laboratory, Kenitra, BP 133, 14000, Morocco
7 Laboratoire Environnement et Energies Renouvelables, Faculté des Sciences, Université Ibn Tofail, B.P: 133, 14000 Kénitra, Morocco
Original language: French
Copyright © 2015 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.
In Morocco, like in all developing countries, sanitation and sewage treatment are one of the biggest environmental problems. The lack of public network for waste water treatment, the absence of control and of environmental sensitivity contribute to spreading diseases, degrading landscapes and contaminating surface as well as underground water. Wastewater is considered their main polluting factor.
In Morocco, the treatment of wastewater by the natural lagoon is probably the most efficient solution both in economic terms and in terms of performance. The objective of this work is to study the physical, chemical and bacteriological parameters of raw and treated water from the station.
For this, we opted carried out a series of measures: For the physicochemical parameters as temperature, pH, salinity, turbidity, the redox potential, electrical conductivity (EC), biochemical oxygen demand BOD5, chemical oxygen demand (COD), suspended solids SS, and O2 dissolved oxygen and bacteriological parameters as fecal coliforms (FC) and total coliforms (CT). Data analysis showed that the treatment efficiency of the station reached respectively 15,86%, 55,34%, 55,58% of the SS, COD and BOD5 which does not meet the discharge standards. The bacteriological analysis showed faecal pollution of human origin and performance of abatement of fecal germs can be deduced that the treatment adopted by facultative ponds far beyond the values required by Moroccan or European standards.
Author Keywords: Natural lagoons, raw sewage, SS, COD, BOD5, bacteriological parameters, Azilal.
Volume 13, Issue 3, November 2015, Pages 507–517
Youssef Azami Idrissi1, Nabil Darwesh2, Isslam BELHAILI3, Abdellah Lachheb ACHHEB4, Ali Alemad5, Khadija Elkharrim6, and Driss Belghyti7
1 Laboratoire d'Environnements et Energies Renouvelables, Faculté Des Sciences, Université Ibn Tofail de Kénitra, Morocco
2 Laboratoire d'Environnements et Energies Renouvelables, Faculté Des Sciences, Université Ibn Tofail de Kénitra, Morocco
3 Laboratoire d'Environnements et Energies Renouvelables, Faculté Des Sciences, Université Ibn Tofail de Kénitra, Morocco
4 Laboratoire de Procédés de Séparation, Département de chimie, Faculté des Sciences, Université Ibn Tofail– Kénitra, Morocco
5 Laboratoire d'Environnements et Energies Renouvelables, Faculté Des Sciences, Université Ibn Tofail de Kénitra, Morocco
6 Department of Biology, Ibn Tofail University, Faculty of Sciences, Environment and Renewable Energy Laboratory, Kenitra, BP 133, 14000, Morocco
7 Laboratoire Environnement et Energies Renouvelables, Faculté des Sciences, Université Ibn Tofail, B.P: 133, 14000 Kénitra, Morocco
Original language: French
Copyright © 2015 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
In Morocco, like in all developing countries, sanitation and sewage treatment are one of the biggest environmental problems. The lack of public network for waste water treatment, the absence of control and of environmental sensitivity contribute to spreading diseases, degrading landscapes and contaminating surface as well as underground water. Wastewater is considered their main polluting factor.
In Morocco, the treatment of wastewater by the natural lagoon is probably the most efficient solution both in economic terms and in terms of performance. The objective of this work is to study the physical, chemical and bacteriological parameters of raw and treated water from the station.
For this, we opted carried out a series of measures: For the physicochemical parameters as temperature, pH, salinity, turbidity, the redox potential, electrical conductivity (EC), biochemical oxygen demand BOD5, chemical oxygen demand (COD), suspended solids SS, and O2 dissolved oxygen and bacteriological parameters as fecal coliforms (FC) and total coliforms (CT). Data analysis showed that the treatment efficiency of the station reached respectively 15,86%, 55,34%, 55,58% of the SS, COD and BOD5 which does not meet the discharge standards. The bacteriological analysis showed faecal pollution of human origin and performance of abatement of fecal germs can be deduced that the treatment adopted by facultative ponds far beyond the values required by Moroccan or European standards.
Author Keywords: Natural lagoons, raw sewage, SS, COD, BOD5, bacteriological parameters, Azilal.
Abstract: (french)
Au Maroc, comme dans tous les pays en développement, l'assainissement et le traitement des eaux usées constituent certainement l'un des plus grands problèmes environnementaux. L'absence de réseau public, le manque de stations d'épuration, l'absence de contrôle et de sensibilisation à l'environnement contribuent à la propagation des maladies, à la dégradation du paysage et à la contamination des eaux superficielles et souterraines. Les eaux usées sont considérées comme les principales sources de pollution pour les eaux souterraines et de surface.
Au Maroc, le traitement des eaux usées domestiques par lagunage naturel présente l'une des solutions efficace au niveau des performances et économiquement attrayante. L'objectif de ce travail est d'étudier les paramètres physico-chimiques et bactériologiques des eaux brutes et épurées de la station. Pour cela, nous avons opté à réaliser un ensemble de mesures: Pour les paramètres physicochimiques la température, pH, turbidité, potentiel redox, salinité, conductivité électrique (CE), demande biochimique en oxygène (DBO5), demande chimique en oxygène (DCO), les matières en suspension (MES), et l'oxygène dissous O2 et pour les paramètres bactériologiques les coliformes fécaux (CF) et les coliformes totaux (CT). L'analyse des données a montré que le rendement épuratoire de la station a atteint respectivement 15,86 %, 55,34 %, 55,58% de la MES, DCO et DBO5 ce qui n'est pas conforme aux normes de rejet.
L'analyse bactériologique montre une pollution fécale d'origine humaine et le rendement d'abattement des germes fécaux nous permet de déduire que le traitement adopté par les bassins facultatifs dépasse largement les valeurs exigées par les normes marocaines ou européennes.
Author Keywords: Lagunage naturel, Station d'épuration, MES, DCO, DBO5, paramètres bactériologiques, Azilal.
How to Cite this Article
Youssef Azami Idrissi, Nabil Darwesh, Isslam BELHAILI, Abdellah Lachheb ACHHEB, Ali Alemad, Khadija Elkharrim, and Driss Belghyti, “Study of the treatment performance of the technique of Natural lagoons of the treatment plant for domestic wastewater of the city Azilal -MAROC-,” International Journal of Innovation and Applied Studies, vol. 13, no. 3, pp. 507–517, November 2015.
