Performance Evaluation of Electro-Coagulation Process Using Different Electrodes for Removing Hardness from Drinking Water
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Date
2020
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Uva Wellassa University of Sri Lanka
Abstract
The presence of hardness in water is problematic when it comes to water treatment. Many
different removal methods are in use for removing hardness from the water. However,
each has its advantages and disadvantages. Amongst those, electrocoagulation has gained
much attention as it outperforms other methods due to its simple and fast process. This
study aims to investigate optimum pH and retention time to achieve maximum removal of
hardness using the Electrocoagulation process using an aluminum anode and an iron
cathode. The electrode area, the distance between two electrodes, and potential
differences in the Electrocoagulation process were kept constant during all the
experiments as in 30 cm2
, 5 mm, 20 V respectively. The concentration of hard water, 500
ppm was synthetically prepared to mimic the concentration of hardness in groundwater in
the Jaffna peninsula. The prepared solution was filled into the container and the
Electrocoagulation process was run with changing initial pH and retention time. At the
end of the experiments, the hardness of the water samples was measured by using EDTA
titrimetric method. Experimental results showed a maximum hardness removal efficiency
of 84% at initial pH 8.5 during 60 minutes retention time.
Keywords: Hardness, Electrocoagulation, Aluminum anode, Iron cathode, Jaffna
Peninsula
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Keywords
Environmental Science, Ecology, WATER MANAGEMENT TECHNOLOGY, Water Management System