PURIFICATION OF CORK PROCESSING WASTEWATERS BY OZONE, BY ACTIVATED SLUDGE, AND BY THEIR TWO SEQUENTIAL APPLICATIONS

ACERO J. L. / BENITEZ F. J. / GARCIA J. / et al. - ARTICLE DE PERIODIQUE - 2003

Wastewaters generated in the cork processing industry were treated in continuous reactors by means of single treatments separately - a chemical ozonation and an activated sludge system - and then by both sequential processes - ozonation followed by aerobic degradation, and aerobic degradation followed by ozonation. The removal obtained in the ozonation alone were 12-54%, 65-81% and 55-89% for the COD, total phenolics and absorbance at 254nm respectively, while the consumed ozone varied from an initial 0.60 to final values between 0.68 and 0.93. The sequential processes increased the substrate removal efficiencies.(2003/11/05)