Moderate organic matter removals took place within the HF(27±14% for COD and41±33% forBOD5). However, overall elimination rates were veryhigh(78±7% forCODand91±7% forBOD5) andlaid within the range reported by Herrera-Melián etal.(2010) in asimilar treatment system in the warm climate of the Canary Islands(Spain).