which is consistent with the data cited by other authors [10,29]. It is emphasized that no concentrations of furfural and 5-HMF it were detected in CABH. Regarding to phenols, a great reduction of these compounds was observed, since after adjusting the pH with Ca(OH)2, they dropped from 8.53 g L−1 to 3.30 g L−1, which corresponds to 38.7% of the initial content. In CABH-3, which was detoxified with activated charcoal with larger particles, it was noted that the treatment was not efficient in the elimination of acetic and formic acids, that remained at concentrations of 4.64 g L−1 and 0.36 g L−1, respectively. On the other hand, CABH-4, which was subjected to the treatment with powdered charcoal, complete elimination of formic acid was observed, along with a slight decrease in acetic acid concentration (11.11%).