The invention discloses a method for treating
sludge with
heavy metals exceeding the standard. The method comprises the following steps: mixing 2300 parts by weight of the
sludge with
water content of 80% (weight percentage) or below and heavy
metal content exceeding the standard, 4.6-6.9 parts by weight of aerobic
microbial agent, 690-805 parts by weight of auxiliary material and 184-276 parts by weight of heavy
metal passivating agent and carrying out
fermentation for 15-20 days for obtaining the
sludge after the treatment; the aerobic
microbial agent comprises the active ingredients of
Bacillus subtilis, Bacillus stearothermophilus,
Aspergillus niger, thermophilic sporotrichum and
Saccharomyces cerevisiae; and the auxiliary material is one or any combination of shale,
peat,
sawdust, coco
peat or cassava residue. The purpose of adding the aerobic
microbial agent is to kill harmful microbes,
pathogen and helminth eggs in the materials, decompose toxic and harmful organic matters and realize reduction, stabilization and harmless treatment of the materials; and the addition of the heavy
metal passivating agent can transform the heavy metal form without causing the direct damage to organisms. The sludge after the treatment can be used for safe landfill, soil can be covered on a landfill field, and plants can be grown in the soil, thereby beautifying the environment and improving the
ecology.