id a

a c a b, tion) of main AC/CWAO intermediates allowed the classification of the intermediates into readily biodegradable, inert or toxic/ treatments. At present, several physical, chemical or bio-logical technologies are available and have shown to be resistant to biological treatment (Parkhurst et al., 1979; LeBlanc, 1980). On the other hand, chemical oxidation methods aiming a complete destruction might become extremely cost-inten-sive; in fact, the investment cost for biological processes may range from 5 to 20 times less than those of chemica