School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Sci Total Environ. 2023 Jan 15;856(Pt 1):159009. doi: 10.1016/j.scitotenv.2022.159009. Epub 2022 Sep 23.
In this study, the effect of Fe on the quinone redox cycling driving lignocellulosic degradation in composting systems was investigated. The results showed that the degradation rates of cellulose, hemicellulose, and lignin were higher in the experimental group (CT) with Fe(SO) addition than in the blank group (CK) (CT, 52.55 %, 45.14 %, 56.98 %; CK, 49.63 %, 37.34 %, 52.3 %). Changes in the abundance of key enzymes for quinone reduction (AA3_1, AA3_2, AA6) and the structural succession of microbial communities were analyzed by metagenomic analysis. Among them, Fe(SO) had the most significant effect on AA3_2, with an approximately 8-fold increase in abundance compared to the beginning of composting. The dominant phylum in the composting process was Actinobacteria. In conclusion, the addition of Fe(SO) contributed to the quinone redox cycling and effectively improved the degradation rate of lignocellulose in composting.
本研究考察了 Fe 对堆肥系统中醌类物质氧化还原循环驱动木质纤维素降解的影响。结果表明，添加 Fe(SO)的实验组（CT）的纤维素、半纤维素和木质素的降解率高于空白组（CK）（CT，52.55%、45.14%、56.98%；CK，49.63%、37.34%、52.3%）。通过宏基因组分析，分析了醌还原关键酶（AA3_1、AA3_2、AA6）丰度的变化和微生物群落的结构演替。其中，Fe(SO)对 AA3_2 的影响最为显著，与堆肥开始时相比，其丰度增加了约 8 倍。堆肥过程中的优势门是放线菌。综上所述，Fe(SO)的添加有助于醌类物质的氧化还原循环，有效提高了堆肥中木质纤维素的降解率。
