Optimization of electroflotation for cattle slaughterhouse wastewater treatment: Effects of current density and quantity of electrodes

The elevated demand for meat results in a corresponding increase in the intensity of slaughtering practices.The volume of wastewater generated increases with the number of animals slaughtered in the abattoir.This study aimed to evaluate the effectiveness of the electroflotation method in reducing pollutant parameters in liquid waste from slaughterhouses.This research employed a batch system and Graphite and aluminum electrodes.Electrical voltage variations are 5 V (T1), 10 V (T2), and 15 V (T3), while the number of plates is three pairs (V1), four pairs (V2), and five pairs (V3).The characteristics of abattoir wastewater consist of a chemical oxygen demand (COD) of 2,360 mg/L, a biochemical oxygen demand (BOD) of 1,487 mg/L, total suspended solids (TSS) of 280 mg/L, fat and oil content of 1,251 mg/L and ammonia concentration of 67,057 mg/L.The optimal pollutant reduction efficacy is achieved with a voltage fluctuation of 15 V and five pairs of electrode plates (10 plates).The reduction efficiencies are as follows: COD at 94.2%, BOD at 96.6%, TSS at 97.02%, ammonia at 84.82%, and oil and fat at 91.77%.An augmentation in electric power and the quantity of plates is associated with reduced COD, BOD, TSS, oil and fat concentrations, and ammonia levels.This indicates an enhanced level of elimination efficiency.The greater the O 2 and H 2 gas production, the more bubbles are generated.This suggests that electroflotation is more effective in diminishing pollutants in wastewater from the livestock abattoir.