Exploring the humification process of municipal sludge in hyperthermophilic composting through metagenomic and untargeted metabolomic

被引：8

作者：

Ma, Feng ^{[1
]}

Wang, Youzhao ^{[1
]}

Quan, Haoyu ^{[1
]}

Wang, Zhipeng ^{[1
]}

Zhao, Chaoyue ^{[1
]}

Li, Xu ^{[1
]}

Liang, Baorui ^{[3
]}

Zhang, Hao ^{[4
]}

Hao, Liying ^{[2
]}

Zhu, Tong ^{[1
]}

机构：

[1] Northeastern Univ, Inst Proc Equipment & Environm Engn, Sch Mech Engn & Automat, Shenyang 110819, Peoples R China

[2] China Med Univ, Sch Pharm, Dept Pharmaceut Toxicol, Shenyang 110122, Peoples R China

[3] Tsinghua Univ, Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China

[4] China Med Univ, Hosp 1, Shenyang 110001, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2023年 / 387卷

关键词：

Composting temperature; Organic matter degradation; Thermophilic bacteria; Metabolic pathways; Humification index; ORGANIC-MATTER; BACTERIAL COMMUNITY; TEMPERATURE; REMOVAL;

D O I：

10.1016/j.biortech.2023.129575

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Hyperthermophilic composting (HC) has been widely recognized for the advantage of high treatment efficiency for organic wastes. However, the humification process is still unclear. In this study, the humification process of HC was investigated, compared to conventional composting (CK). The results showed that the highest com-posting temperature, organic matter degradation rate, and humification index in HC were 92.62 degrees C, 23.98%, and 1.59, while those in CK were 70.23 degrees C, 14.49 %, and 1.04, indicating HC accelerated humification process. Moreover, the results of metagenomic and untargeted metabolomic showed that the genes and metabolisms related to carbohydrate, lipid, amino acid, fatty acid, and nucleotide were more abundant in HC. Consequently, the metabolic pathways regarding organic matter degradation and microbial reproduction were enhanced in the high temperature stage of HC, further accelerating the humification reaction in the low temperature stage. This work contributes to the comprehension of the humification mechanism in HC.

引用

页数：12

共 41 条

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