Preparation of adsorbent made from biochemical sludge and its application in treatment of wastewater

Using biochemical and petrochemical sludge of sewage as raw materials and using different activations to prepare activated carbon adsorbent,and studying activated effects of different activators on the adsorbent ability, the results showed that the activated carbon adsorbent made by chemical activation was better,and the optimum activator was complex of ZnCl_2 and H_2SO_4,and the optimum ratio of ZnCl_2 and H_2SO_4 was 2∶1,contrasting commodity of pellet carbon,the pore characteristics of activated carbon adsorbents were studied.The capacity of iodine adsorption of adsorbent made from sewage sludge was 596.58 mg·g~(-1),the rate of achievement was 51.8%,and the capacity of iodine adsorption of adsorbent made from petrochemical sludge was 438.31 mg·g~(-1),the rate of achievement was 67.5%.By application of these adsorbents to treatment of wastewater,the removal rates of COD were better.