乔玮,任征然,熊林鹏,董仁杰

• 1:中国农业大学工学院
• 2:国家能源生物燃气高效制备及综合利用技术研发(实验)中心
• 3:中国农业大学烟台研究院

摘要(Abstract)：

沼气提纯是制备生物天然气的重要过程,实验在玉米秸秆中温连续厌氧发酵反应器中通入外源H_2,考察外源H_2通入量对秸秆产气性能、沼气组分以及发酵稳定性的影响。研究发现,当每天向每升反应器(有效容积)通入1.5 L的H_2时,反应器运行6d达到稳定,沼气中甲烷体积百分率由54%提纯到93%。由于CO_2的消耗,pH由7.17升高到8.04。此阶段实验组和对照组挥发性固体(VS)去除率分为45%和49%,没有显著性差异(P值为0.40)。乙酸浓度为(170±39) mg·L~(-1),丙酸浓度为(8±5) mg·L(-1);对照组乙酸浓度为(45±5) mg·L(-1),其他VFAs均未检测到。通入外源H_2反应器的溶解在液相的氢气(液相氢)为(2.6±1.2)μmol·L(-1),对照组液相氢浓度为(20.7±7.4)μmol·L(-1)。通入外源H_2并未对产气和VFA的降解产生严重的抑制作用。综合所研究各项结果,外源H_2可以有效地提纯沼气,对发酵和稳定性没有显著的影响。

关键词(KeyWords)： 秸秆;甲烷发酵;外源H_2;沼气提纯;甲烷

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51408599);; 北京市科技计划课题(D1611000016003,D1611000016001);; 山东省重点研发课题(2016ZDJS11A07)

作者(Author): 乔玮,任征然,熊林鹏,董仁杰

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