ETHANOL CONVERSION PERFORMANCE AND HEAVY METAL TREND OF Jerusalem artichoke TUBER IN MINE HEAP AREA

Fan Zhanhui; Zeng Lijuan; Qi Minghui; Xiao Wenxiong; Shen Fei

doi:10.19912/j.0254-0096.tynxb.2021-1554

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (4) : 247-252. DOI: 10.19912/j.0254-0096.tynxb.2021-1554

ETHANOL CONVERSION PERFORMANCE AND HEAVY METAL TREND OF Jerusalem artichoke TUBER IN MINE HEAP AREA

Fan Zhanhui^1,2, Zeng Lijuan³, Qi Minghui³, Xiao Wenxiong⁴, Shen Fei¹

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Abstract

In this work, Jerusalem artichoke tubers harvested from the heavy metal polluted soil were employed to produce ethanol via phosphoric acid hydrolysis and fermentation. The hydrolysis conditions, ethanol fermentation performance and the distribution of heavy metals in each stream of ethanol production were investigated. Results indicated that the suitable conditions for yielding the reducing sugar from tuber is phosphoric acid concentration of 4%, temperature of 90 ℃, hydrolysis duration of 180 min, and solid-liquid ratio of 1:6, by which the reducing sugar yield reachs 92.40%. The subsequent ethanol yield reachs 53.04 g/L within 48 h with the conversion rate of 94.00%. In the whole process of ethanol production, 40%-90% of heavy metals enter the waste residue and waste liquid system, and less than 2% enter the ethanol part, thus, it should be paid more attentions on the fermented mash, especially on the solid part of the fermented residues.

Key words

bioethanol / hydrolysis / fermentation / heavy metal / Jerusalem artichoke tuber

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Fan Zhanhui, Zeng Lijuan, Qi Minghui, Xiao Wenxiong, Shen Fei. ETHANOL CONVERSION PERFORMANCE AND HEAVY METAL TREND OF Jerusalem artichoke TUBER IN MINE HEAP AREA[J]. Acta Energiae Solaris Sinica. 2023, 44(4): 247-252 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1554

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