Reduction of Soluble Organic Carbon and Removal of Total Phosphorus and Metals From Swine Wastewater by Electrocoagulation

Abstract

In this study, the effects of operating time (t), current density (CD) and initial pH were investigated for soluble organic carbon (SOC) and total phosphorus (TP) removal from swine wastewater, pretreated in an UASB reactor, using an electrocoagulation process with aluminum (Al) and iron (Fe) electrodes. For the optimal conditions, Cu, Zn, Mn, Fe and Al removal, sludge production and energy consumption were evaluated. The removal efficiencies for the Al electrode were 78%, 96%, 84%, 99%, 65% and 84% for SOC, TP, Cu, Zn, Mn and Fe, respectively. For the Fe electrode the removal efficiencies were 57%, 96%, 81%, 99 % and 61% for SOC, TP, Cu, Zn and Mn, respectively. The sludge generated, energy consumption, and theoretical hydrogen yields were 5 g/L, 1-18 kWh/L and 0.7-8.5 kWh, respectively. The electrocoagulation process can be used for soluble organic carbon, phosphorus and metals removal from swine wastewater.

Optimizing the Reduction of Total Suspended Solids in Pump Water from Fish Factories Through Electrocoagulation using Response Surface Methodology

“…There have been several reports on utilization of electrocoagulation for the treatment of wastewater with high organic content [Azarian et al, 2018;Mores et al, 2018]; however, this technology has not been tested in sea wastewater such as pump water, which has higher ionic content due to dissolved salts (3.5%) and high content of organic matter. Moreover, using chemicals in the treatment of pump water from fishing industries results in negative impact on treatment costs and retrieval of low-quality solids (sludge) with high metal content and low value, which limits its application.…”

The effects of ultrasound and electrocoagulation on removal of manganese from wastewater

“…Thus, these disadvantages have created space for a development of other technologies, such as electrocoagulation (EC) and ultrasound (US). EC involves the application of electric current through sacrificial electrodes to an aqueous solution [7]. Aluminium (Al) and iron (Fe) electrodes are A C C E P T E D ______________________________________________________________________________________________________________________ most used [8].…”

“…Aluminium (Al) and iron (Fe) electrodes are A C C E P T E D ______________________________________________________________________________________________________________________ most used [8]. It is an emerging technology in water and wastewater treatment that combines the advantages of coagulation, flotation (or settling) and electrochemistry [7]. EC is usually easy to operate, has high treatment efficiency and moderate to short operating time.…”