环境工程学报2017，Vol.11Issue(12)：6404-6414,11.DOI:10.12030./j.cjee.201703001
纤维素乙醇糟液对稻秸猪粪厌氧发酵的促进机制
Promotion mechanism of Lignocellulose ethanol vinasse addition on mixed an aerobic fermentation of rice straw and swine manure
摘要
Abstract
Ethanol production via lignocellulose generates a large amount of acid vinasse.Due to the low C/N and pH,the vinasse is difficult to be digested by anaerobic fermentation.While mixed with additional carbon source such as straw and swine manure,the vinasse can be digested effectively in anaerobic co-fermentation system.The biogas yield with substrates of straw mixed with vinasse were 627.8,585.6 and 443.9 mL · g-1 TS at TS 3％,6％ and 9％ respectively,which were much higher than 292.5 mL · g-1 TS in straw control without vinasse addition.The CH4 concentration has improved to above 70％ from 60％,indicating the enhancement of methane producing via hydrogenotrophic methanogens by vinasse addition.The highest biogas yield 676.7 mL · g-1 TS with substrate of swine manure mixed with vinasse obtained at TS 3％.For the mixed substrate of straw and manure with vinasse addition,the optimal TS ratio of straw to manure was 1:1,and the highest biogas yield was 425.3 mL · g-1 TS.The maximum VFAs of straw with vinasse group were 2.8 to 4.7 times higher than the straw control group.The lag phase time of biogas production prolonged significantly.The fermentation type turned from mixed type fermentation to typical butyric type fermentation.The VFAs of swine manure with vinasse group was relatively lower,while had shorter lag phase time and the fermentation type changed from mixed fer mentation to propionic type.The results showed the biogas enhancement pathway by vinasse supplement was different according to various carbon sources.Mixing with vinasse in the substrate of straw and manure will create a highly efficient anaerobic co-digestion system.The vinasse can effectively stimulate and accelerate the biogas yield of straw and swine manure while the degradation and utilization of itself also can be enhanced efficiently in the co-fermentation.关键词
厌氧发酵/沼气/糟液/秸秆/猪粪/混合发酵Key words
anaerobic digestion/biogas/ethanol vinasse/straw/swine manure/co-fermentation分类
资源环境引用本文复制引用
艾平,张济韬,席江,沈子赢,杨志浩,陆逸,胡钗..纤维素乙醇糟液对稻秸猪粪厌氧发酵的促进机制[J].环境工程学报,2017,11(12):6404-6414,11.基金项目
国家自然科学基金资助项目(51406064) （51406064）
中央高校基本科研业务费专项(2015PY077) （2015PY077）
