Pollution Research Paper

Vol 38, Issue 1, 2019; Page No.(251-255)

PURIFICATION STUDY OF THE URBAN WASTE WATER OF THE CITY OF ANNABA (EAST OF ALGERIA)

N. LASKRI, N. NEDJAH AND M. BACCOUCHE

Abstract

From a lime produced at the steel complex (Annaba, Algeria), we carried out purification and coprecipitation of the suspended elements and colloids of the waste water of the city of Annaba (east of Algeria). This study focuses on investigating the evolution of the pollution criteria parameters. We first demonstrated the effectiveness of calcium hydroxide in the co-precipitation of urban waste water compared to conventional coagulants, and then we characterized the quality of the purified waste water. We have found from the results obtained that, unlike the case of natural waters, lime is a good precipitant for urban waste water. Co-precipitation is accompanied by a notable reduction in the rates of chemical pollution factors (the case of the ortho-phosphates is significant) and a reduction in bacteriological pollution to values below the accepted standards.

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