Companies around the world produce waste as a by-product of their products. The waste products are classified as solid wastes, medical wastes, wastewaters, and different kinds of wastes. Overall, the wastewaters have the highest impacts on the environment, since they are discharged into the seawater, and might also be discharged into the municipal wastewaters. In addition, the composition of the wastewater varies from one company to another, but mainly it contains different kinds of solids either organic or inorganic. The wastewater coming from the slaughterhouses and the poultries is considered one of the most high-impact effluents because of its complex composition. Therefore, the main goal of the project is to use the aerobic reactors in order to treat the wastewater coming from the slaughterhouses and the poultries. The methods used in the project to monitor the efficiency of the treatment, were basically monitoring the changes in the chemical and physical characteristics, like, COD and pH of the effluent during the treatment process, and then to calculate the efficiency of the treatment and the loading rate. The results obtained provided us with the variability of the organic pollutants in the wastewater. For example, the pollution caused by the wastewater coming from both the poultry slaughterhouse and the Mawashi slaughterhouse was low, and the treatment efficiency for the poultry and the slaughterhouse was about 83% and 86%, respectively. In addition, with the loading rates used in the experiment, the efficiency was about 90%, which means that if the residence times increased, the activated sludge reactor would digest the organic pollutants completely.


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