The treatment of sewage sludge allows it to be reused in the production of natural fertilisers or renewable energy. But what is sewage sludge, and how is it treated? Find out in this new episode of #DoYouSpeakSUEZ ! Do you speak SUEZ is a series of short videos in which our experts answer your questions and shed light on our business and activities. Watch all the other Do you speak SUEZ videos here: • Do you speak SUEZ