程玉娥,邓小宁,楼毕觉,林春绵

• 1:浙江工业大学 环境学院，浙江 杭州 310014

摘要(Abstract)：

建立微氧连续通入沼气厌氧发酵中试装置，实现H₂S原位脱除的目的。以水稻秸秆为原料进行高温（55℃）发酵，探究沼气微氧发酵过程中通氧量对H₂S原位脱除及微生物群落特征的影响。结果表明，微量O₂的通入使得发酵平稳期沼气产气量、甲烷产量及甲烷体积分数明显增加，但与O₂通入量不成正比；通氧量以150 mL·L^-1·d^-1为宜，此时沼气产气量高出对照组约23%，甲烷产量也最大，并高出对照组约27%。H₂S的去除率随通氧量的增加而提高，通氧量为150 mL·L^-1·d^-1时，H₂S脱除效率达98.0%，且沼气中残留的O₂体积分数可控制在0.5%以下；微量O₂的通入可明显促进挥发性脂肪酸的降解，pH可维持在7.0~8.5，有效提高了沼液中化学需氧量及总固体的降解率。微氧条件下发酵液中微生物多样性仅有轻微变化，古菌和细菌的群落结构也未受明显影响。

关键词(KeyWords)： 秸秆;微氧发酵;硫化氢;微生物群落

Abstract:

Keywords:

基金项目(Foundation): 中德合作项目-德国罗伯特·博世基金会（Robert Bosch Stiftung）基金（32.5.8003.0078.0）。

作者(Author): 程玉娥,邓小宁,楼毕觉,林春绵

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