Combining wet rendering with torrefaction to improve the fuel characteristics of biochar from food waste

Ruwaida, Abdul Rasid and Tai, Xin Yee and Rahsya Nur Udzaifa, Abdul Rahman and Mazni, Ismail (2018) Combining wet rendering with torrefaction to improve the fuel characteristics of biochar from food waste. In: 4th International Conference On Global Sustainability & Chemical Engineering (ICGSCE 2018) , 5 - 6 September 2018 , Kuala Lumpur. pp. 1-15.. (Unpublished)

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Food waste is a potential source of renewable carbon that can be utilized as a feedstock for biofuel production. Instead of disposing it in the landfills, food waste can be processed through thermochemical process known as torrefaction, which is conducted between 200C and 300C under inert atmosphere, to produce energy-dense biochar. Due to high oil content in the food waste, wet rendering process is introduced as a pre-treatment step to remove the oil from food waste. In this study, the potential of food waste as a renewable energy source is studied, where the biochar produced from direct torrefaction (DT) is compared with the biochar produced from torrefaction process that is preceded with wet rendering (WR) process. Food waste was torrefied in the fixed bed reactor at temperatures 220C, 240C and 260C, with various residence times (15 min, 30 min and 45 min). The produced biochar were characterized in terms of its elemental composition, High Heating Value (HHV) and proximate analysis which includes moisture content, fixed carbon, ash content and volatile matter. It was found that the torrefied food waste shows improved physical properties when compared to raw food waste. The moisture content showed significant reduction while the fixed carbon increased with increasing torrefaction and residence time. This effects were further improved with WR, especially HHV which indicates that the WR process followed by torrefaction may be able to further improve the produced biochar.

Item Type: Conference or Workshop Item (Speech)
Uncontrolled Keywords: Torrefaction; Wet rendering; Food waste; Biochar; Biomass
Subjects: T Technology > TP Chemical technology
Faculty/Division: Faculty of Chemical & Natural Resources Engineering
Depositing User: Pn. Hazlinda Abd Rahman
Date Deposited: 17 Jul 2019 01:38
Last Modified: 19 Oct 2022 02:40
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