Publications Scientifiques
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Item Alfa stems (stipatenacissima L as substrate for water denitrification(Université M'Hamed Bougara Boumerdes, 2018) Benrachedi, Abdellah Lokman; Selatnia, A.; Benrachedi, K.Biologicaldenitrification of drinking water was studied in up-flow laboratory reactors packed with alfa stems (stipatenacissima L) which served as the sole carbon source as well as the only physical support for the microorganisms. The highest rates of denitrification were observed in fresh reactors during their first week of operation and the efficiency of the process declined thereafter.The addition of fresh alfa stems brought about a temporary improvement of the denitrification performance and a regime of one weekly addition prevented the deterioration of a reactor which was operated for 5 months. The rate of denitrification was affected by the water velocity and decreased at velocities above 0.054 m.d-1 .Colour and soluble organic carbon associated with fresh alfa stems removed by adsorption on powdered activated carbonItem Valorization of sawdust using Biological denirification of synthetic nitrates-contaminated ground water(Research Journal of Chemistry and Environment, 2018) Boumechhour, Fatima; Benbelkacem, Ouerdia; Ben Lefki, Rabah; Berrehal, Ahmed; Asselah, Amal; Benrachedi, Khaled; Bouchemal, NaimaNitrate pollution in receiving waters has become a serious issue worldwide. In Algeria, underground water pollution by nitrates has become alarming. Globally, denitrification is commonly employed in biological nitrogen removal processes to enhance water quality. This research investigated the valorization of a vegetable residue (sawdust) as carbon source and biofilm carrier for denitrification in batch reactor to remove nitrate from synthetic groundwater. Throughout the study, the effects of some important parameters including initial nitrate concentration (50-130 mg/L), amount of carbon source (2-8 g/L) and initial pH (4-11) were studied. The results showed that the system achieved high denitrification; nitrate removal was greater than 99 % after 3 hours of incubation. The nitrite concentration (NO2 -) in the effluent was below 0.030 mg/L. The results also showed an important effect of C/N ratio on the performance of the process.Item Removal of nitrates in wastewaters(2016) Angar, Yassmina; Djelali, Nacer-Eddine; Kebbouche-Gana, SalimaItem Comparison of biological nitrate reduction effectiveness of two strains isolated from activated sludge(Chemical Publishing, 2016) Angar, Yassmina; Kebbouche-Gana, Salima; Djelali, Nacer-Eddine