1. a Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Av. Presidente Antônio Carlos, 6627, Belo Horizonte, MG CEP 31270-901, Brazil
2. b Department of Forestry Engineering, Federal University of Jequitinhonha and Mucuri Valleys, Road MG 367, 5000, Diamantina, MG CEP 39100-000, Brazil