Role of exogenous hydrogen in methane yield during anaerobic digestion of waste fat, oil, and grease by coupling carbon cloth with exogenous hydrogen

doi:10.1016/j.jclepro.2024.142302

	Role of exogenous hydrogen in methane yield during anaerobic digestion of waste fat, oil, and grease by coupling carbon cloth with exogenous hydrogen
	Liu, Xuzhen 1; He, Xia 1,2; Lu, Jian3 ; Dong, Jia 1
发表期刊	JOURNAL OF CLEANER PRODUCTION
ISSN	0959-6526
	2024-05-15
卷号	454 页码:11
关键词	Carbon cloth Hydrogen injection Direct interspecies electron transfer Lipid-rich wastes Methane recovery
DOI	10.1016/j.jclepro.2024.142302
通讯作者	He, Xia([email protected])
英文摘要	Carbon cloth (CC) coupled with exogenous hydrogen (EH2) was used to promote direct interspecies electron transfer (DIET) during anaerobic digestion of waste fat, oil, and grease (FOG). However, whether the change of EH2 injection pattern would further enhance DIET and FOG conversion for methane production is unknown, and the underlying mechanism is not fully understood. In this study, three EH2 injection pressures (0.2/0.4/0.6 atm) and frequencies (once/every 8 days/every 4 days) were chosen to collaborate with CC for investigating the role of EH2 in methane yield during FOG digestion. The results show that, combined with CC, increased EH2 injection pressure/frequency resulted in gradually enhanced DIET to increase FOG conversion rate (from 69.9% to 96.7%), leading to the highest cumulative methane production (1204.9 mL/gVSadded) 58.9% higher than that of Control. During the digestion, the secretion of extracellular polymeric substances was increased by EH2 to promote bioaggregation and electron transfer between cells for enhanced biological DIET in the digestate. The influence of EH2 on the microbial communities on CC surface was bigger than that in suspended sludge, leading to enhanced syntrophic acetate oxidation-hydrogenotrophic methanogenesis (SAO-HM) for acetate conversion on CC. As the amount of EH2 increased, the acetate conversion by SAO-HM via DIET was improved, which simultaneously promoted the syntrophic metabolisms between acidogens/acetogens and methanogens to achieve more efficient FOG conversion. Together, this work provides new insight into the role of EH2 in the enhancement of DIET and methane yield during FOG digestion.
资助机构	National Natural Science Foundation of China
收录类别	SCI
语种	英语
关键词[WOS]	EXTRACELLULAR POLYMERIC SUBSTANCES ; ELECTRON-TRANSFER ; OXIDATION
研究领域[WOS]	Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology
WOS记录号	WOS:001235213400001
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/35990
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
通讯作者	He, Xia
作者单位	1.Guilin Univ Technol, Coll Environm Sci & Engn, Guangxi 541006, Peoples R China 2.Guilin Univ Technol, Modern Ind Coll Ecol & Environm Protect, Guilin 541006, Peoples R China 3.Chinese Acad Sci, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Shandong Key Lab Coastal Environm Proc, Yantai Inst Coastal Zone Res YIC,YICCAS, Yantai 264003, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xuzhen,He, Xia,Lu, Jian,et al. Role of exogenous hydrogen in methane yield during anaerobic digestion of waste fat, oil, and grease by coupling carbon cloth with exogenous hydrogen[J]. JOURNAL OF CLEANER PRODUCTION,2024,454:11.
APA	Liu, Xuzhen,He, Xia,Lu, Jian,&Dong, Jia.(2024).Role of exogenous hydrogen in methane yield during anaerobic digestion of waste fat, oil, and grease by coupling carbon cloth with exogenous hydrogen.JOURNAL OF CLEANER PRODUCTION,454,11.
MLA	Liu, Xuzhen,et al."Role of exogenous hydrogen in methane yield during anaerobic digestion of waste fat, oil, and grease by coupling carbon cloth with exogenous hydrogen".JOURNAL OF CLEANER PRODUCTION 454(2024):11.