Insights into thermal hydrolysis pretreatment temperature for enhancing volatile fatty acids production from sludge fermentation: Performance and mechanism

被引：10

作者：

Xiang, Zhuangzhuang ^{[1
]}

Huang, Xiao ^{[1
,2
,3
]}

Chen, Hanfeng ^{[2
]}

Liu, Biming ^{[3
]}

Liu, Ziming ^{[2
]}

Dong, Wenyi ^{[4
]}

Wang, Hongjie ^{[4
]}

机构：

[1] Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Peoples R China

[2] Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Atmospher Environm & Equipm, Sch Environm Sci & Engn, Jiangsu Key Lab Atmospher Environm Monitoring & Po, Nanjing 210044, Peoples R China

[3] Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Cont, Beijing 100084, Peoples R China

[4] Harbin Inst Technol Shenzhen, Sch Civil & Environm Engn, Shenzhen Key Lab Water Resource Utilizat & Environ, Shenzhen 518055, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2023年 / 379卷

关键词：

Acidogenic fermentation; Sludge pretreatment; Acidogenic microbes; Fatty acid biosynthesis pathway; FOOD WASTE FERMENTATION; ANAEROBIC FERMENTATION; POTASSIUM FERRATE; DIGESTION; ACCUMULATION; PHOSPHORUS; YIELD;

D O I：

10.1016/j.biortech.2023.129032

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

To reveal the impact of thermal hydrolysis pretreatment (THP) temperature on the unclear mechanisms of volatile fatty acids (VFAs) production, four groups were established with different temperatures (100, 120, 140 and 160 degrees C), and high throughput sequencing technology was utilized. The results indicated that the optimal VFAs production occurred at 140 degrees C. Moreover, as the THP temperature increased, the proportion of acetic acid also increased, accounting for 10.8% to 26.7% of the VFAs, compared to only 4.9% in the control group. Mechanism investigations revealed that THP facilitated the hydrolysis and release of biodegradable organic matter. Moreover, the abundance of VFAs production and hydrolytic microorganisms and related metabolic functional genes expression were evidently improved by THP. Overall, this study deepens the understanding of the mechanisms through which different THP temperatures stimulate the production of VFAs through acidogenic fermentation, providing technical support for future THP application in sludge treatment.

引用

页数：9