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dc.contributor.authorXie, Guo-Jun
dc.contributor.authorLiu, Bing-Feng
dc.contributor.authorDing, Jie
dc.contributor.authorWang, Qilin
dc.contributor.authorMa, Chao
dc.contributor.authorZhou, Xu
dc.contributor.authorRen, Nan-Qi
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.
dc.relation.ispartofjournalEnvironmental Science and Pollution Research
dc.subject.fieldofresearchChemical Sciences not elsewhere classified
dc.subject.fieldofresearchChemical Sciences
dc.subject.fieldofresearchEnvironmental Sciences
dc.subject.fieldofresearchBiological Sciences
dc.titleEffect of carbon sources on the aggregation of photo fermentative bacteria induced by L-cysteine for enhancing hydrogen production
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorWang, Qilin

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