Journals Proceedings

Abstract

The sludge often contains high concentrations of toxic elements and heavy metals such as lead and mercury Cadmium and others, which negatively affects the use of sludge produced after dewatering and difficult to benefit from it. It affects the environment and the public health of the human. In this study was disposed of heavy metals using a new material that has a high degree of adsorption as well as it is cheap and easy to obtain. We can eliminate the largest percentage of heavy metals by date pits. In the previous paper [1] was used some guidance to select the most suitable flotation technique for sludge dewatering, access to the higher separation of solids at the lowest cost and less operation and maintenance. It was concluded that the experiment was carried out in three stage. In the first case, the best results were obtained when the bubbling pressure was 0.6 kg / cm2. In the second case, the best Alum dose was determined to help the sludge group and float. During the experiment the best dose is 80 mg / L. In the third case, it was concluded that the economic dose of nitrogen gas is 60 mg / L with the separation efficiency of 85%. In this paper thickened sludge is taken after dewatering and injected with a fixed dose of heavy metals (lead Pb and mercury Hg) by 2 mg /L, then we inject the sample with different doses of date pits and measure the remaining heavy metals found. The efficiency of date pits in the removal of heavy metals about 85%. Finally, the results show the feasibility of using date pits for removal of heavy metal from a sewage sludge