Ozone for sludge volume reduction

in the news of WaterandWastewater.com

oxidizing the sludge with ozone before anaerobic decomposition

"The technique relies on the highly oxidising properties of ozone. Part of the return flow of the thickened sludge is extracted in the sewage station and treated with ozone in a reactor tank according to specific conditions. The weakened micro-organisms are then pumped back into the anaerobic basins, where they can be metabolised by the more powerful bacteria. The secret of success with this technique lies in ensuring the correct doses of ozone are applied. Jean Parmentier, of Air Liquide Europe, says that his company calls them 'homeopathic' doses of ozone."

Source: European Environmental Press (EEP)