Process stability and microbial community structure in anaerobic hydrogen-producing microflora from food waste containing kimchi

Jo, Ji Hye; Jeon, Che Ok; Lee, Dong Hoon; Park, Jong

doi:10.1016/j.jbiotec.2007.07.492

Cited by 109 publications

(32 citation statements)

References 28 publications

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“…by means of alkali) and sufficient storage circumstances (preferentially at cold temperature) of such streams. This is attributed to the fact that indigenous strains, for example non-H 2 -producing acidogens such as lactic-and propionic bacteria present in non-aseptic substrate could cause strong contamination and even outcompete the H 2 -producing microbes [68,69].…”

Section: Experiences and Lessons Of Continuous H 2 Producing Bioreactmentioning

confidence: 99%

Review on the start-up experiences of continuous fermentative hydrogen producing bioreactors

Bakonyi

Nemestóthy

Simon

et al. 2014

Renewable and Sustainable Energy Reviews

113

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a b s t r a c tThe start-up of continuous biohydrogen fermentations is a complex procedure and a key to acceptable hydrogen production performance and successful long-term operation. In this review article, the experiences gained and lessons learned from relevant literature studies dealing with various aspects of H 2 producing bioreactor start-up are comprehensively surveyed. Firstly, the importance of H 2 -forming biosystem start-up including its main steps is outlined. Afterwards, the role of main influencing factors and methods (e.g. strain selection, seed pretreatment and inocula stimulation, switch-over time, bioreactor design, operating conditions) in avoiding the deterioration of starting a reactor is analyzed and presented in detail. Finally, the so far suggested applicable start-up strategies and the corresponding findings are critically discussed pointing out the advantages and disadvantages of each strategy.

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Section: Experiences and Lessons Of Continuous H 2 Producing Bioreactmentioning

confidence: 99%

Review on the start-up experiences of continuous fermentative hydrogen producing bioreactors

Bakonyi

Nemestóthy

Simon

et al. 2014

Renewable and Sustainable Energy Reviews

113

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“…One of the disadvantages of this method is underestimation of the true bacterial diversity due to the fact that only the most prominent DGGE bands are analyzed. Various studies have shown that DGGE bands representing LAB are one of the most dominant bands (Fang et al, 2002;Kim et al, 2006;Li et al, 2006;Wu et al, 2006;Hung et al, 2007;Ren et al, 2007;Jo et al, 2007;Lo et al, 2008;Sreela-or et al, 2011). Another method of analyzing the biodiversity of hydrogen-producing consortia is cloning and sequencing of the 16S rDNA gene amplified on the total DNA isolated from the culture probes.…”

Section: Lactic Acid Bacteria -Influence On Hydrogen Producersmentioning

confidence: 99%

“…Cessation of hydrogen generation by LAB was suggested to be due to (i) substrate competition and/or (ii) excretion of bacteriocins inhibiting growth of other bacteria. These observations derive from examinations of both batch (Sreela-or et al, 2011) and continuous (Ren et al, 2007;Jo et al, 2007) mixed cultures as well as co-cultures where one component was a representative of clostridia and the second one of lactic acid bacteria (Noike et al, 2002). Heat treatment was proposed as a method of eliminating lactic acid bacteria (Noike et al, 2002;Baghchehsaraee et al, 2008).…”

Section: Et Al 2006mentioning

confidence: 99%

Lactic Acid Bacteria in Hydrogen-Producing Consortia: On Purpose or by Coincidence?

Sikora¹,

Błaszczyk²,

Jurkowski³

et al. 2013

Lactic Acid Bacteria - R &Amp; D for Food, Health and Livestock Purposes

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“…The amount of ethanol in the culture samples was analyzed by an HP6890 (Agilent) gas chromatograph with a flame ionization detector as described previously (25), with some modifications. The gas chromatograph was equipped with a DB-23 capillary column (length, 60 m; i.d., 0.32 mm; film thickness, 0.25 m; Agilent), with helium as a carrier gas at 1.5 ml min Ϫ1 .…”

mentioning

confidence: 99%

Metabolism of Fructooligosaccharides in Lactobacillus plantarum ST-III via Differential Gene Transcription and Alteration of Cell Membrane Fluidity

Chen

Zhao

Chen

et al. 2015

Appl Environ Microbiol

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dAlthough fructooligosaccharides (FOS) can selectively stimulate the growth and activity of probiotics and beneficially modulate the balance of intestinal microbiota, knowledge of the molecular mechanism for FOS metabolism by probiotics is still limited. Here a combined transcriptomic and physiological approach was used to survey the global alterations that occurred during the logarithmic growth of Lactobacillus plantarum ST-III using FOS or glucose as the sole carbon source. A total of 363 genes were differentially transcribed; in particular, two gene clusters were induced by FOS. Gene inactivation revealed that both of the clusters participated in the metabolism of FOS, which were transported across the membrane by two phosphotransferase systems (PTSs) and were subsequently hydrolyzed by a ␤-fructofuranosidase (SacA) in the cytoplasm. Combining the measurements of the transcriptome-and membrane-related features, we discovered that the genes involved in the biosynthesis of fatty acids (FAs) were repressed in cells grown on FOS; as a result, the FA profiles were altered by shortening of the carbon chains, after which membrane fluidity increased in response to FOS transport and utilization. Furthermore, incremental production of acetate was observed in both the transcriptomic and the metabolic experiments. Our results provided new insights into gene transcription, the production of metabolites, and membrane alterations that could explain FOS metabolism in L. plantarum. Prebiotics are defined as nondigestible food ingredients that selectively stimulate the growth and activity of beneficial microbial strains residing in the host gastrointestinal tract (GIT) (1). Among the sugars that are qualified as prebiotics, fructooligosaccharides (FOS) are fructose polymers of diverse lengths that can be either derivatives of simple fructose polymers or fructose moieties attached to a sucrose molecule (2). Because of the linkage configuration, FOS are not digested in the upper GIT and have been shown in vivo to beneficially modulate the composition of the intestinal microbiota by preferentially increasing the numbers of bifidobacteria and lactobacilli (3, 4).Despite considerable commercial and research interest in the beneficial effects of FOS, the molecular basis of FOS metabolism by specific members of the intestinal microbiota has only recently been examined. In order to understand the influence of environmental conditions on genome-wide gene expression levels, wholegenome DNA microarrays have often been used to survey the gene expression patterns of strains in the presence and absence of oligosaccharides (2, 5-8). On the basis of in silico analysis of the Lactobacillus acidophilus NCFM genome sequence, Barrangou et al. (2) identified a multiple-sugar metabolism (msm) operon that was involved in the metabolism of FOS. The msm operon encodes an ATP-dependent binding cassette-type transport system and a cytoplasmic ␤-fructosidase, which mediates FOS uptake and intracellular hydrolysis. Moreover, expression of the operon was i...

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Process stability and microbial community structure in anaerobic hydrogen-producing microflora from food waste containing kimchi

Cited by 109 publications

References 28 publications

Review on the start-up experiences of continuous fermentative hydrogen producing bioreactors

Review on the start-up experiences of continuous fermentative hydrogen producing bioreactors

Lactic Acid Bacteria in Hydrogen-Producing Consortia: On Purpose or by Coincidence?

Metabolism of Fructooligosaccharides in Lactobacillus plantarum ST-III via Differential Gene Transcription and Alteration of Cell Membrane Fluidity

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