Treatment of transport container washing wastewater by electrocoagulation

Abstract

In this study, the effects of operational parameters such as initial pH, current density, and electrolysis time on the treatment of transport container washing wastewater by electrocoagulation (EC) with aluminum (Al) and iron (Fe) electrodes were investigated separately. Chemical oxygen demand (COD), turbidity and color were used to measure the treatment efficiency. Energy consumptions were calculated per cubic meter of wastewater. Amount of sludge produced after EC was also reported per cubic meter of wastewater. Different direct and indirect cost items including energy, sacrificial electrodes, labor, sludge handling and disposal, maintenance, and depreciation costs have been considered in the calculation of the total operating cost, and it was calculated as per cubic meter of wastewater and per kilograms of COD removed. The total operating costs were acquired as 11.2 $m−3 with 79.45% of COD, 99.71% of color, and 99.45% of turbidity removal efficiencies by Fe electrodes and 23.89 $ m−3 with 76.31% of COD, 99.05% of color, and 99.77% of turbidity removal efficiencies by Al electrodes under the optimum parameters in this study. In addition, the optimum operating times were found as 30 min for Fe electrodes and 60 min for Al electrodes. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 249‐256, 2013

Poly-Lipoic Ester-Based Coacervates for the Efficient Removal of Organic Pollutants from Water and Increased Point-of-Use Versatility

“…1−3 Moreover, prior to being deemed suitable for industrial reuse and/or discharge to a centralized wastewater treatment plant, the pollutant concentration of as-generated raw industrial wastewater is extremely high and requires pretreatment. 4−7 Such is the case, for example, with industrial container and drum cleaning wastewater 4,5 and landfill leachates. 8 At this stage in wastewater treatment, electrocoagulation 4−7 and Fenton oxidation-based treatments 4,6,7 are typically employed to decrease the chemical oxygen demand.…”

“…The continued growth of intractable global water pollution has undoubtedly raised earnest concerns and the keen research interests of scientists all over the world. Resulting from the immoderate sluice of contaminated domestic, industrial, and agricultural water, organic pollutants, such as plastics and their components, pharmaceutical waste, and industrial dyes, can be found extensively in surface water. − Moreover, prior to being deemed suitable for industrial reuse and/or discharge to a centralized wastewater treatment plant, the pollutant concentration of as-generated raw industrial wastewater is extremely high and requires pretreatment. − Such is the case, for example, with industrial container and drum cleaning wastewater , and landfill leachates . At this stage in wastewater treatment, electrocoagulation − and Fenton oxidation-based treatments ,, are typically employed to decrease the chemical oxygen demand.…”

“…Resulting from the immoderate sluice of contaminated domestic, industrial, and agricultural water, organic pollutants, such as plastics and their components, pharmaceutical waste, and industrial dyes, can be found extensively in surface water. − Moreover, prior to being deemed suitable for industrial reuse and/or discharge to a centralized wastewater treatment plant, the pollutant concentration of as-generated raw industrial wastewater is extremely high and requires pretreatment. − Such is the case, for example, with industrial container and drum cleaning wastewater , and landfill leachates . At this stage in wastewater treatment, electrocoagulation − and Fenton oxidation-based treatments ,, are typically employed to decrease the chemical oxygen demand. Unfortunately, both methods suffer from the generation of a metal-laden sludge byproduct that requires further handling and disposal. − Fenton-based treatments also suffer from the high cost of hydrogen peroxide and the metal-based homogeneous catalyst is not retained in the process. ,, As a widely employed material for physical pollutant scrubbing, activated carbon (AC) is the most easily accessible adsorbent material for contaminated water treatment.…”

“…At this stage in wastewater treatment, electrocoagulation − and Fenton oxidation-based treatments ,, are typically employed to decrease the chemical oxygen demand. Unfortunately, both methods suffer from the generation of a metal-laden sludge byproduct that requires further handling and disposal. − Fenton-based treatments also suffer from the high cost of hydrogen peroxide and the metal-based homogeneous catalyst is not retained in the process. ,, As a widely employed material for physical pollutant scrubbing, activated carbon (AC) is the most easily accessible adsorbent material for contaminated water treatment. However, activated carbon’s poor removal of hydrophilic micropollutants − and high energy cost of regeneration , are limiting factors and thus its use to treat wastewater with high concentrations of pollutants prior to discharge to a centralized wastewater treatment plant is limited .…”

A Review of Promising Electrocoagulation Technology for the Treatment of Wastewater

“…Examples in recent Applications of Electrocoagulation in Treatment of Water and Wastewater. Advances in Chemical Engineering and Science paper, leather, pharmaceutical and food industry [1] [2] and [3]. Lately, electrocoagulation (EC) has been playing noticeable role in the drinking water treatment because it affords some substantial advantages such as quite compact, easy operation, automation, no chemical additives, and reduced amount of slug.…”