Treatment of young leachate using electrocoagulation process
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Date
2018-06
Authors
Nur Hayati Mohd Yusoff
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Abstract
Landfilling is one of the most popular methods of municipal solid waste disposal due
to its simplicity in terms of disposal and low cost. One of the main problems with the solid
waste landfill sites is leachate depending on large amount of organic matter, ammonia,
nitrogen and heavy metals. Young leachate tends to be acidic due to presence of volatile fatty
acid with pH normally in the range of 6-7 or lower. Leachate contains a variety of organic and
inorganic contaminants and is classified as problematic and extremely dangerous pollutants
to ecosystem as it can percolate through permeable soil and can pollute groundwater. In this
study, electrocoagulation process was used as an alternative to treat leachate. This method is
characterized by simple equipment and easy operation. The overall objectives of this study
was to determine the optimum treatment condition that influence the efficiency of
electrocoagulation method to treat leachate wastewater. There are three control parameters
that need to be considered during this test such as voltages, treatment time and the present of
sodium chloride as electrolyte. Carbons were used as electrode for both cathode and anode
with or without sodium chloride. The ranges of voltages applied were 3V, 6V, and 9V and the
ranges of treatment time were 10 minutes, 20 minutes, 30 minutes and 40 minutes. The
research work involve the analysed of effects on colour, turbidity, Chemical Oxygen Demand
(COD), total suspended solids (TSS). The optimum removal of color, turbidity, COD and total
suspended solids were 6V with 10 minutes treatment time, 3V with 30 minutes treatment time,
9V with 40 minutes treatment time and 6V with 30 minutes treatment time respectively.
Therefore, the percentage efficiency of pollutant removal on color, turbidity, COD and total
suspended solids were 97.34%, 42.54%, 54.98% and 86.76% respectively. Therefore,
electrocoagulation is proven in treated young leachate effectively