Treatability of Metal Finishing Wastewater in Alexandria | ||||
| Journal of High Institute of Public Health | ||||
| Article 3, Volume 32, Issue 4, October 2002, Page 703-714 | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jhiph.2002.202321 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Magda M. Mohamed; Olfat D. EL-Sebaie; Mamduh EL-Messiery; Mohamed H. Ramadan | ||||
| Department of Environmental Health, High Institute of Public Health, Alexandria University, Egypt | ||||
| Abstract | ||||
| Metal finishing wastes discharged to sewers may be harmful to sewer structure and toxic to treatment plant organisms. This study aims to study the characteristics and treatability of wastes representing the different types of metal finishing in Alexandria. Ten samples from each of the studied three metal finishing types have been collected over one year. The samples were subjected to complete physical and chemical analysis. Two treatment approaches were applied: precipitation and adsorption. The results of analysis indicated that the wastewater effluent violate the decree 44/2000. pH, conductivity, dissolved solids, total phosphate, and some heavy metals are examples of the parameters violated the decree limits. The results of the precipitation treatment using different doses of lime indicated that with increasing in pH, the reduction of all the measured parameters increased. pH of 9.5 [8.5 in case of anodizing waste] have given the best reduction of all the measured parameters and became complied with the decree limits. The results of activated carbon adsorption treatment in pH range from 4.5 to 7.5 indicated that adsorption efficiency increased with pH increasing. pH of 7.5 has been shown the best reduction of all the measured parameters and were complied with the decree limits. The study ended by some recommendations which can be followed to protect both the public health and the sewerage system from the effects of this kind of waste. | ||||
| Keywords | ||||
| Metal Finishing; Wastewater; Alexandria | ||||
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