Treatment of a Malaysian Leachate Sample Using Electrocoagulation

Abstract

A real leachate sample, taken from a Kuala Lumpur suburban area, was used in order to investigate the efficiency of electrocoagulation using Fe electrodes as both cathodes and anodes to reduce chemical oxygen demand (COD) and color of the sample. The effects of pH value and current density on the efficiency of the leachate treatment were investigated. Meanwhile, it was well understood that using this approach for the treatment of the studied leachate could successfully lower the COD value and color of the leachate wastewater by 81% and 72%, respectively. To the knowledge of the authors, to date, no real leachate samples have been treated by electrocoagulation methods elsewhere.

Operational variable effect on the COD removal efficiency using electrocoagulation in landfill leachate treatment

“…The data used in this work were collected from several scientific articles published in the last few decades. 6,40,41,48–89 The characteristics of the leachate, the parameters reported in the treatment and the response variables were considered. Only articles related to landfill leachate treatment by EC were considered, even if EC was considered a single or a combined process.…”

Charcoal Base Metallic Composite Electrode for Wastewater Treatment

“…Leachate also known having high chemical oxygen demand (COD), high levels of ammonia and phosphorus as well as total dissolved solid content (TDS) [7]. To reach environmental friendly criteria for landfill leachate, chemical pollution should be minimized to an acceptable discharge limit [8].…”

Addition of composite coagulant (polyaluminium chloride and tapioca flour) into electrocoagulation (aluminium and ferum electrodes) for treatment of stabilized leachate

“…Some study used a lot of electrodes to treat the wastewater, which cause the treatment cost to increase [6]. Then, from previous study by Li (2011), Mosoumeh (2012) and Shivayogimath (2013) showed that higher current density and duration of current flow, resulted in effectiveness EC process [7,8,9]. Besides that, coagulation-flocculation process is widely used to treat wastewater however it still has disadvantages such as producing a lot of sludge and expensive coagulant needed [10].…”