1. Ph.D. Student, Process Engineering Faculty, Dept. of Environmental Engineering, Univ. of Constantine 3, Ali Mendjeli Nouvelle Ville, Constantine 25000, Algeria (corresponding author).
2. Telematic Univ. Pegaso, Piazza Trieste e Trento 48, 80132 Naples, Italy; Researcher, Environmental Engineering, Telematic Univ., Pegaso.
3. Professor, Process Engineering Faculty, Dept. of Environmental Engineering, Univ. of Constantine 3, Ali Mendjeli Nouvelle Ville, Constantine 25000, Algeria.
4. Dept. of Process Engineering, National Polytechnic School of Constantine, Bp 75, A, Nouvelle Ville RP, Constantine 25000, Algeria.
5. Professor, Dept. of Civil, Architectural and Environmental Engineering, Univ. of Naples Federico II, via Claudio 21, 80125 Naples, Italy.