Improvement of a Biological Treatment by Prior Ozonation

Abstract The operating process used to study the improvement of biodegradability of synthetic waste by ozonation used two biodisk pilot units in parallel. After progressively acclimatizing the micro-organisms to the substrates in the presence and absence of ozonation, the change in purification efficiency of the two biodisks was compared. The results obtained for the compounds studied (paranitroaniline, anthraquinone-2-sulfonic acid, and polyethylene glycol, M.W. 8,000) showed that ozonation significantly improved biodegradation of the solutions.