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Impact of Torrefaction on the Properties of Food Waste Compost
Qiu Yang, Jing Gu, Yazhuo Wang, Haoran Yuan, Mingyang He, Fuan Sun
Strategic Study of CAE ›› 2018, Vol. 20 ›› Issue (3) : 109-116.
PDF(975 KB)
PDF(975 KB)
Impact of Torrefaction on the Properties of Food Waste Compost
The increasing amount of food waste has serious impacts on the environment. At present, the quality of food waste compost is poor, such that soil is easily polluted. This study explores the fuel properties and combustion characteristics of solid products from torrefied food waste compost at five different torrefaction temperatures (250 ℃, 300 ℃, 350 ℃, 400 ℃ and 450 ℃) and a residence time of 30 min. The results show that torrefaction has a significant effect on the fuel properties (ultimate analysis, proximate analysis, HHV, Cl content, mass yield, and energy yield) and combustion characteristics of the food waste compost. The fixed carbon and C content, and HHV of the solid products from the torrefied food waste compost increase; the content of Cl decreases, which effectively inhibits generation of dioxin precursors during combustion and reduces secondary pollution. Heat generated during the burning of the food waste compost after torrefaction is mainly in the fixed carbon combustion stage. Following torrefaction, the overall combustion heat discharge increased and the combustion characteristics improved. The torrefaction temperature of the food waste
compost should be between 250~300 ℃. Torrefaction pretreatment improves the fuel characteristics of the food waste compost significantly.
Food waste compost can be treated as solid fuels to achieve harmless, reduction and resourceful utilization of food waste
compost.
torrefaction / food waste compost / biomass / fuel properties / combustion characteristic
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