COD_(Cr) of effluents from traditional biological treatment process is about 500～800 mg/L, and both the refractory substances and inorganic compounds in leachate contributed to COD_(Cr). Combined cement, NaA1O_2 with Ca(C1O)_2 were applied to advanced treatment of the leachate from aged refuse bio-filter process,and it can meet the second class leachate discharge standards (COD_(Cr) < 300 mg/L) .It is presumed that the removal of C0D_(Cr) in leachate resulted from two ways: one is the oxidation, while hydration is also an important w...
