Patent ID: 8808419

Claim:
A method of integration of concentration-dehydration and aerobic air-drying of sewage sludge, characterized in comprising the steps of: (1) conditioning by an organic agent: adding an organic agent into a residual sludge with a moisture content of 98-99.8% to obtain a mixture, and thoroughly agitating the mixture for 10-180 seconds; (2) gravitationally concentrating the residual sludge conditioned by the organic agent, with the supernatant being isolated and imported to sewage treatment equipments for post-treatment; (3) conditioning by inorganic agents: adding a soluble compound containing Fe 3+ into the concentrated residual sludge to obtain a mixture, agitating the mixture for 10-180 seconds, further adding lime particles, and further agitating for 30-300 seconds; (4) mechanically dehydrating: forcing the residual sludge conditioned by the inorganic agent to plate-and-frame type filtering dehydrator, removing the filtrate and obtaining dehydrated sludge filter cakes; (5) crushing and dispersing: crushing and dispersing the filter cakes into sludge particles; (6) aerobically air-drying: blowing dry air into the sludge particles which are stationary, moving, or overturning to cause aerobically exothermic reactions.