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dc.contributor.authorXie, Guo-Junen_US
dc.contributor.authorLiu, Bing-Fengen_US
dc.contributor.authorDing, Jieen_US
dc.contributor.authorWang, Qilinen_US
dc.contributor.authorMa, Chaoen_US
dc.contributor.authorZhou, Xuen_US
dc.contributor.authorRen, Nan-Qien_US
dc.description.abstractPoor flocculation of photo fermentative bacteria resulting in continuous biomass washout from photobioreactor is a critical challenge to achieve rapid and stable hydrogen production. In this work, the aggregation of Rhodopseudomonas faecalis RLD-53 was successfully developed in a photobioreactor and the effects of different carbon sources on hydrogen production and aggregation ability were investigated. Extracellular polymeric substances (EPS) production by R. faecalis RLD-53 cultivated using different carbon sources were stimulated by addition of L-cysteine. The absolute ζ potentials of R. faecalis RLD-53 were considerably decreased with addition of L-cysteine, and aggregation barriers based on DLVO dropped to 15–43 % of that in control groups. Thus, R. faecalis RLD-53 flocculated effectively, and aggregation abilities of strain RLD-53 cultivated with acetate, propionate, lactate and malate reached 29.35, 32.34, 26.07 and 24.86 %, respectively. In the continuous test, hydrogen-producing activity was also promoted and reached 2.45 mol H2/mol lactate, 3.87 mol H2/mol propionate and 5.10 mol H2/mol malate, respectively. Therefore, the aggregation of R. faecalis RLD-53 induced by L-cysteine is independent on the substrate types, which ensures the wide application of this technology to enhance hydrogen recovery from wastewater dominated by different organic substrates.en_US
dc.relation.ispartofjournalEnvironmental Science and Pollution Researchen_US
dc.subject.fieldofresearchChemical Sciences not elsewhere classifieden_US
dc.titleEffect of carbon sources on the aggregation of photo fermentative bacteria induced by L-cysteine for enhancing hydrogen productionen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.hasfulltextNo Full Text

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