Experimental Study Iron Removal Groundwater South of Algeria (ILLIZI)

The ground waters, which supply the city of Illizi, are loaded with iron according to the origin with the reservoir rocks and the nature of the grounds which surround the aquifer layer. This water is characterized also by a significant turbidity, due to the high rate of the precipitate of ferric iron, of rust color, resulting from the oxidation of ferrous iron in water. The presence of iron in the groundwater involves many nuisances, such as the deterioration of the organoleptic quality and the color of water (in the presence of iron, brownish discoloration with tendency of rust), the degradation of the distribution and storage woks (corrosion, filling) or the reduction in the effectiveness of the disinfection by consumption of oxidant. This work was carried out on the pilots of defferrization being in the neighborhoods of the city of Illizi. Our study is related to two treatment units: - The first device is based on a mechanism of natural Oxygenation by Tour of cascades - Decantation -Filtration (TDF). - The second device is based on a process of artificial Oxygenation by Aerators - Decantation -Filtration (ADF). The principal objective is to determine the characteristics of the pilots making it possible to obtain a greater effectiveness of the units, from the iron removal point of view. Measurement and analysis are related particularly to the total iron and the flow. Measurement and analysis concerns the taken water from the raw water entry in the unit to its exit. The obtained results show that the two tested processes are very effective in the drawdown of the iron contained in water: - First process (TDF) provides folding backs from 0.3 to 0.014 ppm. - Second process (ADF) provides folding backs from 0.39 to 0.026 ppm.