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Reduction of Persistent Organic Pollutant Emissions during Incinerator Start-up by Using Crude Waste Cooking Oil as an Alternative Fuel

Category: Control Techniques and Strategy

Volume: 17 | Issue: 3 | Pages: 899-912
DOI: 10.4209/aaqr.2016.09.0394
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Chia-Yang Chen1, Wen-Jhy Lee1,2, John Kennedy Mwangi 1,2, Lin-Chi Wang3, Jhong-Lin Wu 1,2, Sheng-Lun Lin3

  • 1 Department of Environmental Engineering, National Cheng Kung University, Tainan 70101, Taiwan
  • 2 Sustainable Environment Research Laboratories, National Cheng Kung University, Tainan 70101, Taiwan
  • 3 Department of Civil Engineering and Geomatics, Cheng Shiu University, Kaohsiung 83347, Taiwan


Characteristics of different fuel blends investigated.
Thermal degradation behavior of waste cooking oil blends was studied.
Waste cooking oil blends reduce emissions of toxic pollutants.


Illegal harvesting and recycling of waste cooking oil, also referred to as “gutter oil” in many countries, poses a great food safety threat. Thus, in this study the feasibility of using waste cooking oil as an auxiliary fuel in the furnace of laboratory waste incinerator was evaluated in terms of toxic pollutant emissions. Two fuel blends (W20D80 and W40D60) were blended from varying proportions of diesel fuel (D100), and waste cooking oil (W100) and their physio-chemical characteristics were subsequently determined and compared. Thermogravimetry analysis (TGA) and derivative thermogravimetry (DTG) of D100, W100, W20D80 and W40D60 showed that diesel fuel consist of more volatile short aliphatic hydrocarbons, while the waste cooking oil and its blends had more thermal stable unsaturated long chain molecules. After the de novo synthesis window of 200–400°C, 40% of waste cooking oil and 60% of diesel (W40D60) was injected at around 500–700°C, and reduced the toxicity concentrations of PCDD/Fs and PCBs by an average of 86% and 94%, respectively. This study demonstrated that, by using waste cooking oil as a fuel blend, not only can reduce the possibility of “gutter oil” being put in the food to damage the health of human beings, but also can be recycled as a kind of green fuel to reduce the emissions of persistent organic pollutants (POPs).


PCDD/Fs PCBs Waste cooking oil Laboratory waste incinerator Auxiliary fuel

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