1. Department of Sanitary and Environmental Engineering, Federal University of Santa Maria, Santa Maria, Brazil;
2. Postgraduate Program in Civil and Environmental Engineering, University of Passo Fundo, Passo Fundo, Brazil;
3. Department of Research and Post-Graduation, Federal University of Technology – Paraná, Francisco Beltrão, Brazil;
4. Department of Sanitary and Environmental Engineering, Federal University of Santa Catarina, Florianópolis, Brazil