Bioremediation of heavy metals in animal Manure by earthworms

The study aims to treat cow and buffalo dung from the heavy elements cadmium and chromium. The results showed the absence a significant effect of Lumbricus terrestris and Eisenia fetida by worms. Significant differences between the two types of worms in the average accumulation of cadmium in dung, as well as no significant differences in the average accumulation of cadmium in the tissues of the two types of earthworms. As for the average concentration of chromium in dung, there were significant differences between the two types of worms, as the average concentration of chromium was It reached 14.491 ppm for L.terrestris and 16.316 ppm, while for E.fetida   The average accumulation of chromium in the tissues of worms was significant effect, as the highest average was in L. terrestris, which reached 17,050 ppm compared to E. fetida, which reached 11,558 ppm.