File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Full metadata record

DC Field Value Language
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 -

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.