Impact of the chlorination process on the quality of Algerian surface waters [Impact du procédé de la chloration sur la qualité des eaux de surface algériennes]

The chlorination has appeared as the process of the least expensive and most widespread around the world,including in algeria,where it is the only means of disinfection. however,the physic-chemical composition of the water can affect the disinfection or chlorination and to disrupt it. during the last thirty years,the developments of analytical techniques have highlighted numerous organohalogen compounds as by-products of chlorination including trihalomethanes (thms),although the low concentrations,could exhibit chronic toxicity such as mutagenic and carcinogenic effects. therefore the optimization of chlorination is necessary. in this context,the main goal of our work is to: determine the physical and chemical quality of four algerians types of surface water; it is the waters dams of kherrata and tichy haf (north east of algeria) and the waters dams of foum el gherza and fountaine des gazelles (south east of algeria). give a contribution to the knowledge of the reactivity of chlorine through these four types of algeria water surface. the parameters such as the contact time,the chlorine levels and the organic matter concentration of humic type may also condition the reactivity of chlorine and even the efficiency of the chlorination process.