Cluster analysis of some ecological properties in Al-Rustamiyah wastewater treatment plant 3rd expansion at Baghdad city, Iraq through (2006-2011)


The present study aimed to evaluate performance efficiency of Al-Rustamiyah wastewater treatment plant (3rd expansion) in terms of effluent quality at Baghdad city using cluster analysis. The plant designed to serve 1500000 individual and it is operating on biological treatment method (Activated Sludge Process) with an average wastewater inflow of 300MLD. Wastewater data were collected yearly from 2006 to 2011 by Mayoralty of Baghdad from the influent and effluent in Al-Rustamiyah wastewater treatment plant for major water quality parameters, such as biological oxygen demand (BOD5), chemical oxygen demand (COD), total suspended solids (TSS) and pH over a period of six years. Water samples were analyzed in the central laboratory of Al-Rustamiyah wastewater treatment plant. Performance efficiency of the plant has been estimated for each year. Multivariate statistical technique of the data has been attempted by applying cluster analysis using Statistical Package for Social Sciences. The result reveals that the overall performance of the existing was satisfactory. Cluster analysis shows that years (2007, 2008, 2009 and 2011) indicate a good level of treatment compared to that of 2006 and 2010. Final effluent quality (in term of mean value of six years) does not meet the stringent regulations proposed by the Iraqi National Standards set by the Regulation 25 of 1967.The BOD5/COD ratio of the influent was calculated as 0.46 in total wastewaters.