Coupling anaerobic digestion process and electrocoagulation using iron and aluminium electrodes for slaughterhouse wastewater treatment

Scientific African

Adjoumani Rodrigue KOUAKOU¹  Rajeshwar Dayal TYAGI²  Patrick DROGUI²  Kopoin ADOUBY²  Ahissan Donatien EHOUMAN³  Kouakou Eric ADOU⁴ 

[1] Corresponding author.;Institut National de la Recherche Scientifique (INRS Eau Terre et Environnement), Université du Québec, 490 rue de la, Couronne, Québec City, Canada;Laboratoire de Thermodynamique et de Physico-Chimie du Milieu (LTPCM), UFR-SFA,UFR-SFA, Université Nangui-Abrogoua, 02 BP 801, Abidjan 01, Côte d'Ivoire;Laboratoire des Procédés Industriels, de Synthèse de l'Environnement et des Énergies Nouvelles (LAPISEN), Institut National Polytechnique Houphouët-Boigny, BP 1093, Yamoussoukro, Côte d'Ivoire;

关键词: Anaerobic digestion;    Coupling process;    Electrocoagulation;    Slaughterhouse wastewater;   

DOI  :  

来源: DOAJ

【 摘 要 】

The performance of a two-stage process combining anaerobic digestion (AD) and electrocoagulation (EC) was studied for the treatment of slaughterhouse wastewater (SWW). Anaerobic digestion was used as primary treatment, whereas electrocoagulation process was used as secondary treatment. After anaerobic digestion, the optimal current density and the treatment time for Chemical Oxygen Demand (COD) and P-PO43− removal by electrocoagulation using Fe and Al electrodes were determined. These optimal conditions were finally used for the secondary treatment of slaughterhouse wastewater by electrocoagulation. The primary treatment by anaerobic digestion removed of 49.93 ± 0.37% COD. However, this led to an increase in residual concentration of P-PO43−. The optimal conditions for COD and P-PO43− removal by electrocoagulation were obtained with a current density of 18.18 mA/cm2 and a treatment time of 40 min for both types of electrodes. The secondary treatment by electrocoagulation respectively resulted from a total removal of 79.73±0.75% and 80.12±0.85% COD, 95.90±0.03% and 95.42±0.11% NO3−, and 92.48±0.20% and 90.66±0.36% of turbidity, respectively, with Fe and Al electrodes. This study reveals the complementarity of anaerobic digestion and electrocoagulation could be the basis of a process able to simultaneously remove organic and inorganic pollutants for various applications (municipal and industrial wastewater treatment, etc.).

【 授权许可】

Unknown