Analyse écotoxicologique des effluents urbains étude de cas des villes: Khenchela, Oum El Bouaghi et Ain Beida
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Date
2017-06
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Université Abbes Laghrour -Khenchela-
Abstract
Shortage problems and deteriorating quality of water, have led to increased interest in the reuse of
treated wastewater in many countries of the world. The purpose of this study is to examine the effect of
such practices on the environment and specifically on the biotic domain. The wastewater samples
collected from the discharge points of the three cities Oum el Bouaghi, Khenchela and Ain Beida have
been characterized : (EC, pH, BOD and COD), micro and macro - nutrients and heavy metals. The results
showed significant variations in the composition of these waters. Wastewater is considered to be a very
important source for producing crops (eg barley (Hordeum vulgare L.) due to the shortage of irrigation
water in the Algerian High Plains region and especially the Tarf basin. The bioessays were to investigate
the effect of irrigation with treated wastewater (ABP / KhP) and not treated (OEB/ ABV / KhV) at
different dilutions on germination of barley yield and white henbane (plant of Therapeutic interest). The
results show no effect of the raw and purified waters of the town of Khenchela on the germination of
barley compared to their effect on the germination of the white henbane (between 6.25% and 18.75%
germinated) for the raw water and (between 12.5% and 43.75% germinated) for treated water. The waters
of the town of Ain Beida seem to have more effect on the germination of barley (between 31.25% and
75% germinated) among the other stations.