METHOD FOR DISPOSAL CONSIDERATION, IN PARTICULAR OF Sludge formed during the treatment of sewage

摘要

1. A way to eliminate waste, including: - carrying out acid oxidative hydrolysis of incoming waste (loading); - performing alkaline oxidative hydrolysis of the mass leaving acid oxidizing hydrolysis; - chemical conditioning of the mass leaving alkaline oxidative hydrolysis by adding an acid reagent; - separation undissolved residue, if present. 2. The method according to claim 1, wherein the waste to be disposed of is sludge obtained from wastewater treatment. The method according to claim 2, further comprising feeding recycle of the eluate obtained at the separation stage into the purification process from which the incoming charge is received. The method according to claim 1, further comprising a preliminary stage of mechanical grinding of the incoming load. The method according to claim 1, further comprising, after the alkaline oxidative hydrolysis step, a step of separating insoluble metal hydroxides. The method according to claim 1, in which the stage of acid oxidative hydrolysis is performed at a pH from 0.1 to 5.0, preferably from 2.5 to 3.5.7. The method according to claim 1, wherein the stage of acid oxidative hydrolysis is carried out at a temperature of from 35 ° C to 100 ° C, preferably from 60 ° C to 75 ° C. The method according to claim 1, wherein the stage of acid oxidative hydrolysis is carried out by introducing into the mass of molecular oxygen and / or an organic or inorganic peroxide oxidizing agent. The method according to claim 1, in which the stage of alkaline oxidative hydrolysis is performed at a pH from 8.0 to 12.0.10. The method according to claim 1, in which the stage of alkaline oxidative hydrolysis is performed at a temperature of from 40�