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.
The model of high solid anaerobic digestion was used by improving the degree of homogeneity of the reaction system and biogas slurry reflux to gradually increase the material load. The vinegar residue-efficient anaerobic digestion system was successfully constructed without pretreatment. The optimum anaerobic digestibility was observed when the material loading of the reaction system reached 6. 15 g·（ L·d）^-1,when the amount of biogas produced per unit of dry material was 396 m L·g^-1,and the amount of methane produced per unit of dry material was 211 m L·g^-1. The degradation rate of hemicellulose reached 63. 66%,which was the main reason for the improvement of anaerobic digestion performance. The degradation rates of cellulose and lignin were 21. 46% and 24. 43%,respectively. The lower degradation efficiency was mainly due to the complicated degradation of the benzene ring structure in lignin and hindered hydrolysis of cellulose,which had a shielding effect on cellulose degradation.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2017年第10期4340-4347,共8页
Environmental Science
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)
关键词
醋糟
厌氧消化
物料负荷
木质纤维素
纤维素酶
vinegar residue
anaerobic digestion
material loading
lignocellulose
cellulase
作者简介
周云龙（1994-），男，硕士研究生，主要研究方向为固废资源化，E-mail：983038363@qq.com
通信作者，E-mail：wqruanjn@gmail．com
