Document Type : Original Article

Author

• Nahed Farhoud

Faculty of Technical Engineering, University of Aleppo, Syria

Abstract

Due to the wide spread of technical slaughterhouses for poultry; and the severe pollution caused by the drained water of poultry slaughterhouses, the aim of this study was to treat this water in order to protect the environment on the one hand; rationalizing water consumption on the other hand; also, this study is as a contribution to get biogas as a source of energy. In this research, the startup process was carried out at a temperature of (15 ± 2) °C, and it took (111) days, where a decrease in the COD and TDS values was observed until the COD value was fixed at (1136 mg/l), whereby the removal efficiency of COD and TDS improved. with an increase in startup time. The factors affecting the efficiency of poultry technical slaughterhouse wastewater treatment were studied which were (the residence time, the temperature, initial concentration of raw water). Five residence times were studied (6 - 18 - 24 - 35 - 48) h It was noted that the concentration of COD and TDS decreased with an increase in the hydraulic residence time. Studying the effect of temperature on the treatment efficiency within the range (5-50) °C, It was noted that the removal efficiency of COD and TDS increasing with increasing temperature, and at temperature of (45-50) C° the concentration of COD in the treated water was (285.12 mg/l), which reached the specification Syrian Standard No. 2752/2008 Class C (forest trees and industrial crops). Five initial concentrations of raw water were studied, and it was noted that the increase in the COD concentration in the raw water was accompanied by an increase in the COD concentration of the treated water.  It was noticed that the removed organic load decreased with the increase in the residence time, while it was noted that with the increase in temperature, the value of the removed organic load increased. The volume of biogas resulting from the treatment was also calculated according to the same conditions studied for each experiment and by (3) replications. The maximum biogas production was 0.27 liters per gram COD removed.

Keywords

• poultry slaughterhouses
• residence time
• organic load
• biological treatment
• processing efficiency
• biogas
• up-flow anaerobic suspended sludge bed reactor UASB