Neutralizing of sludges, such as sediments from cleaning of waterways, rich in heavy metals and organic substances, comprises addition of phosphoric acid, calcination, adding hydraulic binder and water, setting and hardening

摘要

Neutralizing of waste sludge (1) containing heavy metals and organic substances comprises addition of phosphoric acid (2), calcination (6), adding hydraulic binder to calcination product (7), mixing with water (8) and subjecting obtained mixture (11) to setting and hardening.