摘要
以猪粪作为发酵原料,接种量为30%,中温35℃条件下考察不同固含量对厌氧发酵产气量的影响情况,同时建立其动力学模型。研究结果表明,三组实验产气趋势总体相似,都在第13 d和第22 d左右分别出现产气高峰,但从积累产气量来看,总固体含量(TS)为6%的条件下总产气量最高为7 179 m L。利用发酵动力学进一步分析,发现可以将厌氧发酵过程分两个时间段(每15 d一段)进行拟合,所得线性方程的相关系数R^2大部分高于0.90,方程描述结果与试验数据比较接近。说明Cheynoweth方程可以描述猪粪产甲烷的规律,研究数据能为以猪粪为原料的厌氧发酵工程上的应用奠定理论基础。
A laboratory-scale study was performed on the batch anaerobic digestion of pig manure with 30% inoculation quantity. The results showed that the three sets of experimental gas laws were basically the same,both at the peak of the13 d and the 22 d. The optimum proportional of pig manure was in the condition of 6% solid content,and the highest biogas production（ TS） was achieved 7 179 mL. The study of fermentation dynamics found that the anaerobic fermentation process can be matched in two phases（ each phase for 15d）. The correlation coefficients R^2 of the model are more than 0. 90,and the fitting results are closer to the experimental data. The results of the study can provide theoretical basis for the application of pig manure in anaerobic fermentation.
出处
《黑龙江科学》
2017年第8期7-9,13,共4页
Heilongjiang Science
关键词
固含量
猪粪
厌氧发酵
沼气
动力学模型
Biogas
Pig manure
Anaerobic fermentation
Methane
Dynamic model
