1. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Rhode Island, Bliss Hall, Kingston, RI 02881.
2. Project Manager, Suez-Environment-CIRSEE, 38 rue président Wilson, 78230 Le Pecq, France.
3. Assistant Professor, Dept. of Chemical Engineering, School of Engineering, Univ. of Santiago de Compostela, Avda Lope Gomez de Marzoa s/n, E-15782 Santiago de Compostela, Galicia, Spain.
4. Professor, Dept. of Chemical Engineering, School of Engineering, Univ. of Santiago de Compostela, Avda Lope Gomez de Marzoa s/n, E-15782 Santiago de Compostela, Galicia, Spain.