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DC Field | Value | Language |
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dc.citation.startPage | 150854 | - |
dc.citation.title | CHEMICAL ENGINEERING JOURNAL | - |
dc.citation.volume | 488 | - |
dc.contributor.author | Luo, Lijun | - |
dc.contributor.author | Lim, Roktaek | - |
dc.contributor.author | Pradhan, Nirakar | - |
dc.date.accessioned | 2024-05-23T11:35:08Z | - |
dc.date.available | 2024-05-23T11:35:08Z | - |
dc.date.created | 2024-05-23 | - |
dc.date.issued | 2024-05 | - |
dc.description.abstract | Lactic acid production under anaerobic dark fermentation is inversely related to hydrogen (H 2 ) production. In this study, a novel pH regulation mechanism was proposed to convert lactic acid to H 2 . The study also investigates the roles played by dominant microbial communities and enzymes in the degradation of kitchen waste, resulting in lactic acid accumulation and its subsequent conversion to H 2 . Furthermore, a two-phase Gompertz function was applied to describe the cumulative H 2 production, with the first phase representing H 2 production from readily degradable sugars, followed by the second phase representing H 2 production from lactic acid conversion. The study finds that the optimal H 2 production from lactic acid occurred within a pH range of 5.5 to 6.0. When the pH exceeded 6.0, it led to propionic acid accumulation and a subsequent reduction in H 2 production. The observed H 2 yield was found to be 39.23 +/- 2.29 mL-H 2 /g of volatile solids (VS) for the pHunregulated experiments and 28.60 +/- 2.78 mL-H 2 /g VS for the pH-regulated experiments. Finally, microbial community analysis reveals that Lactobacillus (relative abundance (RA): 63 - 66 %) and Bifidobacterium (RA: 19 - 21 %) are the dominant lactate producers in the initial phase, while Megasphaera (RA: 26 %), Veillonella (RA: 3.4 %), and Clostridium sensu stricto 7 (RA: 5 %) are the primary lactate utilizers and H 2 producers in the subsequent phase. These findings highlight the mechanistic understanding of lactic acid-based H 2 production from putrescible organic waste like kitchen waste and enhance the understanding of the acidogenic phase of anaerobic digestion. | - |
dc.identifier.bibliographicCitation | CHEMICAL ENGINEERING JOURNAL, v.488, pp.150854 | - |
dc.identifier.doi | 10.1016/j.cej.2024.150854 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.scopusid | 2-s2.0-85189519538 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/82663 | - |
dc.identifier.wosid | 001215742300001 | - |
dc.language | 영어 | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.title | Lactic acid-based fermentative hydrogen production from kitchen waste: Mechanisms and taxonomic insights | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental; Engineering, Chemical | - |
dc.relation.journalResearchArea | Engineering | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Lactic acid | - |
dc.subject.keywordAuthor | Dark fermentation | - |
dc.subject.keywordAuthor | Microbial community dynamics | - |
dc.subject.keywordAuthor | Metabolic pathway | - |
dc.subject.keywordAuthor | Two-phase Gompertz model | - |
dc.subject.keywordAuthor | Biohydrogen | - |
dc.subject.keywordPlus | BIOHYDROGEN PRODUCTION | - |
dc.subject.keywordPlus | FOOD WASTE | - |
dc.subject.keywordPlus | DARK FERMENTATION | - |
dc.subject.keywordPlus | BACTERIA | - |
dc.subject.keywordPlus | LACTATE | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | BUTYRATE | - |
dc.subject.keywordPlus | VINASSE | - |
dc.subject.keywordPlus | PH | - |
dc.subject.keywordPlus | SUBSTRATE | - |
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