Comparing Copper Sulfate, Aluminum Sulfate and Ferric Chloride in Removing Microbial and Organic Contaminations in Municipal Waste Latex

Since large amounts of municipal wastes and their environmental problems are one of major problems of our country, making use of special processes and methods to remove microbial and organic contaminations in latex of municipal wastes seems so essential that not only will soil fertility be increased but also spreading of pollution in environment will be prevented; however, it should be noted that this latex has useful nutrition for plant growth. Thus, in this study, coagulation process was used to remove microbial and organic contaminations in municipal waste latex. In Iran, copper sulfate, aluminum sulfate and ferric chloride are coagulants that have the most usages in purifying municipal water and sewage. In this study, a comparison was conducted between making use of these metallic salts in three concentrations of 15, 30 and 45 mg/l in reducing microbial contaminations (bacteria, fungi, mould, yeast and coliform) and organic contaminations (TOC) in municipal waste latex and optimum type and concentration of these salts in decreasing microbial and organic contaminations were determined. Results showed that metallic salts cause a reduction in microbial and organic contaminations and copper sulfate and ferric chloride had better performance than aluminum sulfate and that ferric chloride in concentration 30 mg/l was a better choice in compare to copper sulfate in reducing microbial and organic contaminations and aluminum sulfate was more effective only in reducing the number of fungi, mould and yeast