Industrial Dye Wastewater Treatment by Electrocoagulation
Date
2022-05-30
Journal Title
Journal ISSN
Volume Title
Publisher
Department of Civil and Environmental Engineering (CEE), Islamic University of Technology(IUT)
Abstract
Wastewater is not only one of the leading causes of permanent environmental damage, but
it also contributes to the depletion of freshwater reserves on the planet, posing a major
threat to future generations. Many industrial operations use a lot of freshwaters, dumped as
wastewater. This wastewater must be treated adequately to decrease or eliminate pollutants
and attain the purity level needed for re-use in industrial processes to ensure sustainability.
Industrial wastewater contains a high concentration of organic pollutants that are active
agents in water pollution. This research was conducted to remove various contaminants
from industrial wastewater using electrolysis. Electrolysis is a very effective wastewater
treatment method for removing contaminants and creating hydrogen gas as a revenue
stream to compensate for operating costs. The removal efficiency of these treatments for
chemical oxygen demand (COD), total suspended solids (TSSs), color, and turbidity from
industrial wastewater was investigated using a simple electrolytic reactor at different
electric current densities (CDs) and retention times (RTs). Our experiment observed that
the highest removal efficiency for the parameters COD, TSS, turbidity, and color was
obtained for 50V electricity and 4 hours RT, and the values are 73.92%, 91.67%, 73.63%,
and 92.86%, respectively. It was also observed that as CD and RT increased, so did the
removal efficiency of COD, TSS, turbidity, and color. Before the treatment, COD, TSS,
turbidity, and color values for raw wastewater were 69 mg/L, 12 mg/L, 3.11 NTU, and 168
PT-Co, respectively. And after the electrocoagulation, COD, TSS, turbidity, and color
values decreased to 18 mg/L, 1 mg/L, 0.82 NTU, and 12 PT-Co, respectively, for 50V
electricity and 4 hours RT. However, as CD and RT levels increased, the parameters like
pH, DO, salinity, TDS, and electrical conductivity (EC) also increased. It was noticed that
the change in turbidity is proportional to the change in TSS. A linear and proportional
relationship between EC and TDS was also observed in this study.
Description
Supervised by
Dr. Amimul Ahsan,
Assistant Professor,
Department of Civil and Environmental Engineering (CEE),
Islamic University of Technology (IUT),
Boardbazar, Gazipur, Bangladesh.
This thesis is submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Civil and Environmental Engineering, 2022.
Keywords
Citation
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