Kinetic study of slaughterhouse wastewater treatment by electrocoagulation using Fe electrodes

Abstract

In this study, treatment of slaughterhouse wastewater by electrocoagulation was investigated in batch system using Fe electrodes. The effect of various variables such as electrode number, current density and operating time was tested. Pollutant removal efficiency increased with increasing electrode number and operating time. The biochemical oxygen demand (BOD(5))(,) chemical oxygen demand (COD), total suspended solid (TSS), and total nitrogen (TN) removal efficiencies using eight electrodes at a contact time of 50 min and a current density of 10 A/m(2) were 66, 62, 60, and 56%, respectively. Higher electrode numbers will allow shorter operating times to achieve certain removal efficiencies. Also, removal efficiencies increased by increasing the current density; the highest removal efficiencies of BOD(5,) COD, TSS, and TN at a contact time of 50 min and a current density of 25 A/m(2) were 97, 93, 81, and 84%, respectively. The results also show that the reactor pH varies directly with the current density; at 25 A/m(2), the reactor pH increased from an initial value of 7.1 to 7.7 after 50 min. The experimental results showed that the kinetics of BOD(5), COD, TSS and TN removal could be fitted adequately using a first order kinetic model (higher R(2)).

Slaughterhouse wastewater characteristics, treatment, and management in the meat processing industry: A review on trends and advances

“…Thus, COD removal efficiencies of up to 85% were obtained with the current density of 0.5 mA/cm 2 at pH of 3.0. Likewise, Ahmadian et al (2012) examined the performance of EC for SWW treatment in a batch system using Fe electrodes. Organic matter and nutrient removal rates were improved by augmenting current density, operating time, and electrode number.…”

Municipal Leachate Treatment by Fenton Process: Effect of Some Variable and Kinetics

“…The most important role of Fenton process is removing refractory and toxic organic compounds and increasing the degradability of resistant organic compounds. Fenton processes have been successfully used for treatment of the slaughterhouse, food, olive oil wastewater, and 2,4,6-trichlorophenol from industrial wastewater and landfill leachate [15, 17–22]. This method compared to other advanced oxidation processes is relatively less expensive and requires less time [23].…”

Efficiency of Multi Walled Carbon Nanotubes for Removing Direct Blue 71 from Aqueous Solutions

“…The reaction pathways, along times to reach the equilibrium is explained by adsorption kinetic [37][38][39]. Studying the adsorption kinetics is so important to understand the adsorption reactions dynamic and predicting the adsorption rate, which is useful for process design and modeling.…”