Evaluation of electrocoagulation in the post-treatment of anaerobic wastewater of slaughterhouse and packing plant

The demand for food production brings with it the increase of effluent generation, which represents a great problem slaughterhouses, since effluents contain higher organic load, requiring adequate treatment to decrease environmental impacts. This study examines an alternative solve this problem: application electrocoagulation in anaerobic slaughterhouse and packing plant effluents, as promising technique is both compact robust. removal color, COD turbidity was analyzed, operational cost calculated. To optimize process, CCRD (central composite rotatable design) methodology used two independent variables: electric current density electrolysis time, obtaining complete factorial 2² 4 axial points repetitions at central point. most expressive removals were: 87%, 80% 76% turbidity, respectively, lower obtained 0.12 US$.m-3. statistical analysis allowed valid mathematical models color and, through desirability, found that 8 mA.cm-2 time 20 minutes possible maximize (84%) minimize (0.21 US$.m-3).
 Keywords: cost, COD, turbidity.