醋糟高效厌氧消化体系构建
发布时间：2018-08-27 13:50
【摘要】：运用高固态厌氧消化模式,通过提高反应体系均质程度和沼液回流等手段,逐步提升物料负荷,对未经预处理的醋糟进行厌氧消化处理,成功构建了醋糟高效厌氧消化体系.结果表明,在反应体系物料负荷达到6.15 g·(L·d)~(-1)时表现出最佳的厌氧消化性能,单位干物料产沼气量为396 m L·g~(-1),单位干物料产甲烷量为211 m L·g~(-1).该物料负荷下半纤维素降解率达到63.66%,是醋糟厌氧消化性能提高的主要原因.纤维素、木质素的降解率分别为21.46%、24.43%,较低的降解效率主要是由于木质素中的苯环结构难以降解,并阻碍纤维素酶的水解作用,对纤维素降解产生屏蔽效应.
[Abstract]:By improving the homogenization degree of reaction system and reflux of biogas liquid, the material load was increased step by using the high solid anaerobic digestion model, and the anaerobic digestion system of vinegar lees without pretreatment was successfully constructed. The results showed that the optimum anaerobic digestibility was obtained when the material load of the reaction system reached 6.15 g (L d) ~ (-1). The biogas production per unit dry material was 396mg ~ (-1), and the methane production per unit dry material was 211mg ~ (-1). The degradation rate of hemicellulose reached 63.66 under the material loading, which was the main reason for improving the anaerobic digestibility of vinegar lees. The degradation rates of cellulose and lignin were 21.46% and 24.43 respectively. The low degradation efficiency was mainly due to the difficulty in the degradation of benzene ring structure in lignin and the blocking effect of cellulase hydrolysis.
【作者单位】： 江南大学环境与土木工程学院;江苏省环境厌氧生物技术重点实验室;
【基金】：国家自然科学基金项目(51678279) 江苏省厌氧生物技术重点实验室开放课题项目(JKLAB201606)
【分类号】：X792
本文编号：2207482
[Abstract]:By improving the homogenization degree of reaction system and reflux of biogas liquid, the material load was increased step by using the high solid anaerobic digestion model, and the anaerobic digestion system of vinegar lees without pretreatment was successfully constructed. The results showed that the optimum anaerobic digestibility was obtained when the material load of the reaction system reached 6.15 g (L d) ~ (-1). The biogas production per unit dry material was 396mg ~ (-1), and the methane production per unit dry material was 211mg ~ (-1). The degradation rate of hemicellulose reached 63.66 under the material loading, which was the main reason for improving the anaerobic digestibility of vinegar lees. The degradation rates of cellulose and lignin were 21.46% and 24.43 respectively. The low degradation efficiency was mainly due to the difficulty in the degradation of benzene ring structure in lignin and the blocking effect of cellulase hydrolysis.
【作者单位】： 江南大学环境与土木工程学院;江苏省环境厌氧生物技术重点实验室;
【基金】：国家自然科学基金项目(51678279) 江苏省厌氧生物技术重点实验室开放课题项目(JKLAB201606)
【分类号】：X792
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