Biodegradability enhancement and detoxification of cork processing wastewater molecular size fractions by ozone

- The fraction with molecular size >100 kDa corresponds to 56% of the organic load.
- Molecular size of pollutants is a major constraint to biodegradability.
- Ozone efficiency for improving biodegradability increases with molecular size.
- To raise biodegradability by ozonation the best outcome was with compounds >20 kDa.