| 堆肥过程中木质素的降解机理及影响因素研究进展 |
| |
| 引用本文： | 赵秀云,赵昕宇,杨津津,李绍康,陆祥昕,李翔. 堆肥过程中木质素的降解机理及影响因素研究进展[J]. 环境工程, 2021, 39(6): 128-136. DOI: 10.13205/j.hjgc.202106019 |
| |
| 作者姓名： | 赵秀云 赵昕宇 杨津津 李绍康 陆祥昕 李翔 |
| |
| 作者单位： | 中国环境科学研究院环境基准与风险评估国家重点实验室,北京100012;中国环境科学研究院国家环境保护地下水污染模拟与控制重点实验室,北京100012 |
| |
| 基金项目： | 国家自然科学青年基金（51808519） |
| |
| 摘 要： | 农作物秸秆中的木质素作为自然界中含量丰富的高分子芳香族化合物,结构复杂,微生物难以降解,因此农业废弃物堆肥技术中,木质素的降解利用备受关注.研究表明:木质素是由结构单元通过碳碳键和醚键联接聚合而成,结构稳定.已有堆肥实验证明,木质素的微生物降解过程中真菌占主导地位,其分泌的漆酶、锰过氧化物酶和木质素过氧化物酶等以H2O...
|
| 关 键 词： | 木质素 微生物 堆肥 腐殖质 |
| 收稿时间： | 2020-08-24 |
RESEARCH PROGRESS ON LIGNIN DEGRADATION MECHANISM AND INFLUENCING FACTORS DURING COMPOSTING |
| |
| Affiliation: | 1. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;2. State Key Laboratory of Environment Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China |
| |
| Abstract: | Lignin in crop stalks is a high-molecular aromatic compound abundant in nature. It has a complex structure and is difficult to degrade by microorganisms. Therefore, the degradation and utilization of lignin in agricultural waste composting technology has attracted much attention. Studies showed that lignin was formed by the polymerization of structural units through C-C bonds and ether bonds, and the structure was stable. Composting experiments proved that fungi dominate the process of microbial degradation of lignin. The secreted laccase, manganese peroxidase and lignin peroxidase used H2O2 or O2 as the electron acceptors, which could break the bond, demethylate the aromatic hydrocarbon structure. The polyphenols or phenol produced were polymerized with amino acids, and further polycondensed into humus, which was used as a soil improvement substance to return to the field. Under laboratory and natural conditions, most fungi could degrade lignin for a long period of 30~60 days, with a degradation rate of 20%~50%. The degradation process depended on the culture conditions, the medium temperature 35~45℃ and acidic conditions were more conducive to the degradation of lignin. There was an optimal amount of carbon and nitrogen supplementation in the process of microbial metabolism, and trace Mn2+, Cu2+ inducers could be used to increase the activity of lignin degrading enzymes, which provided an important research direction for regulating the degradation of lignin and artificial humification during composting. |
| |
| Keywords: | |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《环境工程》浏览原始摘要信息 |
|
点击此处可从《环境工程》下载全文 |
|
