Abstract
The present work focused on the development and evaluation of a compact electrocoagulation (EC) reactor, combined between EC and clarifier processes in continuous modes for decolorization and turbidity removal, named the integrated electrocoagulation-sedimentation reactor (IECS). The experiments were firstly conducted in the four-liter batch column in order to optimize the EC configuration and operation condition. The removal kinetics were also investigated and predicted for kinetic correlations. After various optimization steps, the IECS reactor was conducted, consisting of EC and clarifier compartments. Liquid flow pattern in EC compartment was examined through resident time distribution technique for defining the number of EC units and divided baffles. In summary, four units of EC were placed in the EC compartment of the IECS reactor with 90% in the width of three baffles. Each EC unit had two pairs of aluminum electrode plats in monopolar arrangement with a 1.5 cm gap and required a current density of 13.5 mA/cm2. For the clarifier compartment, it was mainly designed based on the batch settling test for separating the precipitated particles. The treatment performance of the IECS reactor was tested at different liquid flows in order to reduce the pollutant to a certain level. For the individual condition, liquid flow rates of 3 and 1 L/min were defined for turbidity and color, respectively. If both pollutants are presented simultaneously, a liquid flow rate of 1–2 L/min can be used for decreasing turbidity from 250 to <20 NTU and color from 6000 to <300 ADMI.
Highlights
Industry is one of the key development sectors for a country’s economic growth
ECsystem and sedimentation units in terms of design operating objective of this present study is to develop anddecolorization evaluate the new tions in both batch and continuous modes for andelectrocoagulation turbidity removal
The flow pattern and treatment performance in the continuous integrated electrocoagulation-sedimentation (IECS) reactor were analyzed as a compact treatment system for industrial wastewater
Summary
Most of the industrial wastewater effluence contains a high amount of color and turbidity as the contaminants. Discharged untreated wastewater from industries, i.e., textile and dyeing operation, pulp and paper production, food processing, mining and coal processing operation, refinery, and slaughterhouse operation, is the main source of ChemEngineering 2022, 6, 3. ChemEngineering 2022, 6, 3 mining and coal processing operation, refinery, and slaughterhouse operation, is the main source of substantial coloration to water. Strong colored wastewater from dyeing oper of 16 ations has unfavorable aesthetic effects but is carcinogenic, mutagenic, and generally detrimental to the environment [3]. A highly colored body of water cannot sustain aquatic life, which could lead to the long-term impairmentsubstances of the ecosystem
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