Treatment of Slaughterhouse Effluents by Planted Filter with Echinochloa pyramidalis

Slaughterhouse wastewater is among the most environmentally hazardous wastewater.These waters are discharged into the environment without treatment.The objective of this study is to evaluate the effect of different concentrations of slaughterhouse wastewater on the purification performance of Echinochloa pyramidalis planted filters.During the study, slaughterhouse wastewater was collected in 10 l polystyrene bottles in 14-days intervals and then characterized for physicochemical and bacteriological parameters according to the standard protocol.Four planted filter treatment devices with Echinochloa pyramidalis were mounted with four different concentrations of slaughterhouse wastewater T1: 25% wastewater + 75% tap water; T2: 50% wastewater + 50% tap water; tap; T3: 75% wastewater + 25% tap water and T4: 100% raw wastewater.The purification performances as well as the morphometric parameters were determined.The results obtained show values of MES (54115 745 mg/L); nitrate (3225.75 448.91 mg/L); COD (13592.17 2007.31 mg/L) and CF (523,333.8 35,555,909 CFU/100 mL) very high compared to the discharge standards.Treatment T1 showed the best performance.However, the values obtained are always above the standards.Hence, the need for optimization or post-treatment of slaughterhouse effluents to reduce as much as possible the pollutant loads of these wastewaters before their discharge.