丙酸预处理提高小麦秸秆厌氧发酵产沼气性能  

Improving the Biogas Production of Wheat Straw using Propionic Aicd Pretreatment in Anaerobic Fermentation Process

作　　者：郑鄂湘 邓剑东 戴本林[2] 

机构地区：[1]厦门东海职业技术学院工程技术学院,福建厦门361100 [2]淮阴师范学院化学化工学院,江苏淮安223300

出　　处：《淮阴师范学院学报（自然科学版）》2017年第1期34-38,共5页Journal of Huaiyin Teachers College;Natural Science Edition

基　　金：江苏省自然科学青年基金项目(BK20160430);江苏省区域现代农业与环境保护协同创新中心科技专项资助项目(HSXT312;HSXT227);淮安市重点研发(社会发展)计划项目(HAS201601-3;HAS201601-4)

摘　　要：为了探究丙酸预处理对麦秆厌氧发酵产沼气性能的影响,采用不同浓度的丙酸溶液对麦秆进行系列预处理,在中温(35±1)℃、小麦秸秆和牛粪按1:1配比的条件下进行了厌氧发酵试验.结果显示,经过不同质量百分数的丙酸预处理过后,小麦秸秆的木质纤维结构被明显破坏,显著缩短了发酵的启动时间,并不同程度上提升麦秆厌氧发酵产沼气的性能.其中以7%丙酸预处理试验组的效果最好,利用其对小麦秸秆进行7 d预处理,然后经过30 d的厌氧发酵.总产气量最多,为15 147 m L,日均产气量为432.77 m L/d,在此情况下,p H初期波动之后,基本保持在7.0左右,日产气量和甲烷含量波动最大.综合以上各种因素可以得出7%丙酸预处理是较优的工艺条件.In order to explore the influence of propionic acid（ CH_3CH_2COOH） pretreatments on characteristics of the biogas production of wheat straw,the experiment was performed in different mass fractions of propionic acid solution,which respectively were 1%,3%,5%,7%. A batch of experiments of straw was conducted under the condition of（ 35 ± 1） ℃ when the same content of straw and excrement were blended. The results indicated that,after the pretreatment of different mass fractions of acid,components of straw were destroyed more apparently and shorten the starting time effectively and the biogas yield was improved. 7%CH_3CH_2COOH pretreatment was best according to all parameters,7% CH_3CH_2COOH was used to pretreated wheat straw for 7 days,and then the anaerobic fermentation for 30 days. Total gas is 15147 m L,average gas is 432. 77 m L/d,In this case,p H swings early,then it remains at around 7. 0,daily gas production and methane content fluctuate mostly. All the results indicated that 7% CH3CH2 COOH pretreatment was much better.

关 键 词：沼气 小麦秸秆 酸预处理 厌氧发酵 

分 类 号：S216.4[农业科学—农业机械化工程] X712[农业科学—农业工程]