treated sludge

1. Treated sludge, as defined in section b of Article 1 of Royal Decree 1310/1990, of October 29. 2. Sewage sludge treated by a biological, chemical, or thermal process and subsequently stored in such a way as to significantly reduce its fermentation potential and the health risks associated with its use. 3. Sewage sludge treated by a biological, chemical, or thermal process and subsequently stored in such a way as to significantly reduce its fermentation potential and the health risks associated with its use.