矿堆区菊芋块茎乙醇转化性能及重金属归趋  

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

作　　者：樊战辉 曾丽娟[3] 戚明辉 肖文雄 沈飞 Fan Zhanhui;Zeng Lijuan;Qi Minghui;Xiao Wenxiong;Shen Fei(College of Environmental Science,Sichuan Agricultural University,Chengdu 611130,China;Chengdu Academy of Agriculture and Forestry Sciences,Chengdu 611130,China;Keyuan Engineering Technology Testing Centre of Sichuan Province,Chengdu 610073,China;Sichuan Tianfujincheng Circular Economy Institute Limited Co.,Chengdu 610000,China)

机构地区：[1]四川农业大学环境学院,成都611130 [2]成都市农林科学院,成都611130 [3]四川省科源工程技术测试中心,成都610073 [4]四川省天府锦成循环经济研究院有限公司,成都610000

出　　处：《太阳能学报》2023年第4期247-252,共6页Acta Energiae Solaris Sinica

基　　金：成都市重点研发支撑计划(2020-YF09-00039-SN)。

摘　　要：以重金属污染土壤种植的菊芋块茎为原料经过磷酸水解后发酵产生乙醇,对水解条件、转化性能及重金属在乙醇生产各环节的归趋进行研究。结果显示:水解磷酸浓度4%、温度90℃、时间180 min,固液比1∶6时,还原糖产率高达92.40%。水解糖液发酵48 h后乙醇产量达53.04 g/L,转化率高达理论转化率的94.00%。乙醇生产中,40%~90%的重金属物质进入废渣废液系统,进入乙醇的部分小于2%,表明重金属污染土壤种植菊芋对后续乙醇转化无影响,在实际生产中应加强废渣的重金属管控。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 of1∶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.

关 键 词：生物乙醇 水解 发酵 重金属 菊芋块茎 

分 类 号：S216[农业科学—农业机械化工程] X53[农业科学—农业工程]