DefinePK

Abstract

Several environmental and health problems caused by industrial and domestic wastewater were identified scientifically decades. Slaughterhouses are probably typical example of those industries where water is used for washing by-products (offal) and the disposal of waste (feces, debris paunch and blood). Our main objective is to characterize the wastewater from the municipal slaughterhouse in the city of Rabat, in order to recommend appropriate treatment to their reuse, reducing their impact on the receiving environment (the Atlantic coast) and enjoy this rich water source into reusable materials. The physicochemical characterization of raw sewage revealed significant organic matter load varying between 668 mg/L and 1203 mg/L. The SM concentration wastewaters analyzed vary between 603 mg/L and 1068 mg/l with an average of 835 mg/L. The temperature of the water remains below 30°.The pH is relatively neutral, whereas the electrical conductivity varies between 590 µs/cm and 1910 µs/cm. The turbidity varies between 590 and 1384 NTU. The mean levels of nitrates and Orthophosphates respectively of the order of 2.65 mg / Let 0.1mg/L. This wastewater has a high organic load in terms of COD that varies between 960 and 2018 mg O2/l and BOD5 fluctuates between 470 and 960 mg O2/l. However the COD/BOD5=2.20, indicating a satisfactory biodegradability of these releases. Biological treatment therefore seems entirely appropriate to their reuse one hand and reducing their impact on the receiving environment (the Atlantic coast). Analysis of heavy metals from wastewater from the slaughterhouse of Rabat, show relatively low concentrations do not exceed 0.5 mg/L. These values meet Moroccan standards of water quality for irrigation.