▎ 摘　　要

NOVELTY - Method for treating sludge for adsorbing heavy metal comprises (S1) carrying out alkaline thermal pretreatment on sludge to obtain pretreated sludge, (S2) cooling the pretreated sludge, adding an acidic solution, adding a heavy metal adsorbent, and stirring to obtain sludge subjected to heavy metal adsorption treatment, where the heavy metal adsorbent comprises white-rot fungi microspheres including calcium alginate and graphene oxide composite microspheres coated with white-rot fungi, and (S3) adding dehydrating agent to the sludge subjected to heavy metal adsorption treatment, and stirring to obtain dehydrated sludge, where the dehydrating agent is blend of surfactant and gypsum and (S4) filtering the dehydrated sludge for 10-20 minutes under -0.035 to -0.06 MPa, and drying. USE - The method is used for treating sludge for adsorbing heavy metal such as lead ion (Pb2+), cupric ion (Cu2+), cadnium ion (Cd2+),and the sludge is used as green fertilizer. ADVANTAGE - The method has excellent adsorption effect on heavy metals such as lead ion (Pb2+), cupric ion (Cu2+), cadnium ion (Cd2+), and realizes sludge deep dehydration, the sludge water content after dehydration is less than 50%, and the sludge has an improvement effect on soil.