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Metidji N.,Development Unit of Solar Equipments | Metidji N.,Blida University | Bacha N.E.,Blida University | Saidi D.,Center Nuclear of Draria | Boutarfaia S.,Center Nuclear of Draria
Advanced Materials Research | Year: 2013

This work has been undertaken in order to determine the effect of alloying with Ni, Mo and B additions on physical and mechanical properties of FeAl alloys. The structural evolutions and morphological changes alloys were characterized by X. ray diffractometry (XRD), Scanning Electron Microscope (SEM) and an Optical Microscope. Antiphase domain sizes and morphologies are reported and correlations between such ordening phenomena, phase precipitations and mechanical properties (micro hardness at low temperature) are discussed. © (2013) Trans Tech Publications, Switzerland.

Igoud S.,Polytechnic University of Mozambique | Souahi F.,Polytechnic University of Mozambique | Eddine Chitour C.,Polytechnic University of Mozambique | Amrouche L.,National School of Management | And 4 more authors.
Desalination and Water Treatment | Year: 2015

The wastewater reuse, especially for irrigation, requires a safer microbial quality. However, the tertiary treatment is often nonexistent, especially in developing countries where, unfortunately, wastewater treatment needs to be more systematic. Solar water disinfection processes could be appropriate treatments for improving the microbial quality of the wastewater reuse. This study evaluates the effectiveness of both solar photolysis and solar photocatalysis processes in disinfecting secondary-treated wastewater recovered from an activated sludge wastewater treatment plant where the disinfection treatment is not applied. The best parameters of the solar disinfection processes were determined. The experiments were conducted in a bench test composed of 4 flat-bottom flasks with a volume of 2 L each. Then, the disinfection efficiency of both processes was evaluated by a comparative study where 250 Wh/m2 of UV radiation was cumulated. The disinfection efficiency of studied pathogenic (1) total coliforms, (2) fecal coliforms, (3) streptococci, (4) staphylococci, (5) sulfite-reducing spores, and (6) fungi ranged from 0.86-Log to 3.35-Log reduction. At last, an innovative static plan photoreactor of 50 L allowed reproducing the positive effect of the solar wastewater disinfection. After 8 h of solar exposure duration and a cumulative UV radiation of 360 Wh/m2, results showed a complete disinfection of all studied pathogenic below the limit detection of the microbial analysis, except of sulfate-reducing spores. © 2013, Balaban Desalination Publications. All rights reserved.

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