Cd^(2+)在大米燃料乙醇联产沼气发酵中的流向分析  

Cd^(2+) Flow Direction in Cadmium Rice-based Fuel Ethanol and Bio-gas Fermentation

作　　者：高楠[1] 王林风[1] 王奇[1] 刘乐[1] 方理想 闫德冉[1] 王晓晨[1] 杨晓青[1] 

机构地区：[1]河南天冠企业集团有限公司车用生物燃料技术国家重点实验室,河南南阳473000

出　　处：《酿酒科技》2015年第2期100-102,共3页Liquor-Making Science & Technology

摘　　要："镉大米"(Cd2+含量0.45 mg/kg)乙醇联产沼气发酵试验结果显示:在液化、糖化、发酵和蒸馏各阶段Cd2+没有发生显著的迁移;经酒精蒸馏后Cd2+非均一分布于糟液和糟米查中,3%~9%的绝干糟米查中积累了10%~27%的Cd2+,剩余73%~90%的Cd2+随糟液进入厌氧发酵产沼气系统中;在沼气发酵中Cd2+出现了明显的迁移,糟液Cd2+含量的约90%以上富集于泥中,而污水Cd2+含量则降至最高镉允许排放浓度以下。以上试验结果为"镉大米"的安全增值转化奠定了理论基础。The fermentation results of cadmium rice-based fuel ethanol and bio-gas showed that, the content of Cd^2＋ varied non-significantly among liquefaction, saccharification, fermentation and distillation;the distribution pattern of Cd^2＋ was inhomogeneous in alcohol lees after alco-hol distillation, 3%～9% of the oven dry alcohol lees accumulated 10%～27% of Cd^2＋, and the remaining 73%～90%of Cd^2＋flowed into the anaerobic fermentation system to produce bio-gas;in the fermentation of bio-gas, Cd^2＋ presented obvious migration, above 90%Cd^2＋ of lees solution concentrated in the sludge, and Cd^2＋ content in the sewage reduced below the highest cadmium emission concentration. All the ex-perimental results could lay a theoretical foundation for safe and value-added transformation of cadmium rice.

关 键 词：镉大米 发酵 燃料乙醇 沼气 酒精 

分 类 号：TQ221.11[化学工程—有机化工] TQ920.6[轻工技术与工程—发酵工程]