DETERMINATION AND ANALYSIS OF DAILY RELIABILITY LEVEL OF MUNICIPAL WASTEWATERTREATMENT PLANT
Résumé
Cette étude présente une détermination et l'analyse duniveau quotidien de fiabilité d'une station de traitement des eaux usées
résiduaires utilisant un procédé à boue activée dans l'Est de l'Algérie, on utilisant une méthodologie développée par Nikuet al.
(1979) pour la détermination du coefficient de fiabilité (CdF), pour les concentrations effluentes de la DBO
5, de la DCO, et des
MES obtenus à partir des données de quatre ans d'opération (2009-2012). Nous avons calculé le Coefficient de fiabilité,et les
normes algériennes de rejet pour déterminer le niveau quotidien de fiabilité pour les paramètres considérés.
Les résultats ont prouvés en global un bon niveau de performances puisque les concentrations de la DBO5et la DCO des eaux
traités présentent une conformité avec les normes de rejet en Algérie, par contre le niveau de performance des MES est très
médiocre dues aux problèmes par l'arrêt du troisième dessableur-déshuileur, et la grande variabilité des quantités et de la
qualité des eaux usées
This paper presents a determination and analysis of daily reliability level of activated sludge wastewater treatment plant in
Eastern of Algeria, using a method developed by Niku et al (1979) for determination of coefficient of reliability (COR), for
effluent concentrations of BOD
5
, COD, and TSS obtained from four years data operation (2009-2012). We calculated COR,
and using Algerian standards concentrations we have determined a daily reliability level for the considered parameters.
The results showed that in global effluent BOD5and COD performances are in terms of compliance with the Algeria standards,
effluent TSS performances are not enough good due to the problem in grit chamber, and the large variability of the influen t
quantity and quality.
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