Recent advances in reuse of waste material as substrate to produce biohydrogen by purple non-sulfur (PNS) bacteria

Wu, Ta Yeong; Hay, Jacqueline Xiao Wen; Kong, Liu Bi; Juan, Joon Ching; Jahim, Jamaliah Md

doi:10.1016/j.rser.2012.02.002

Cited by 99 publications

(41 citation statements)

References 58 publications

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“…Within the latter family different genera were detected and the most abundant were Caenispirillum, Roseospira, Skermanella, and Rhodospira (respectively 35.9%, 26.7%, 9.5% and 4.1% of the Rhodospirillales). PNS are a non-taxonomic group with a versatile metabolism [39], they can grow as photoheterotrophs, but can also use reduced forms of sulfur such as S, H 2 S and S 2 O 2 3À or Fe(II) [40] as an electron donor, switching from one mode to another depending on available conditions such as oxygen concentration, carbon source and light source [39]. The oxidation of H 2 S leads to the formation of S 0 which is then converted to SO 4 2À [40].…”

Section: Figurementioning

confidence: 99%

Anodic and cathodic microbial communities in single chamber microbial fuel cells

et al. 2015

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Section: Figurementioning

confidence: 99%

Anodic and cathodic microbial communities in single chamber microbial fuel cells

et al. 2015

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“…The energy conversion of biomass can be performed in different ways, bio and thermochemical being the most common. Biochemical conversion can be achieved by fermentation or anaerobic digestion [7][8][9], whilst the thermochemical processes include combustion, pyrolysis and gasification, with the oxidizing agent being the major difference between them, since combustion requires an excess of air while pyrolysis takes place in an inert atmosphere. Of these techniques, gasification is one of the most promising as it allows solid matter with a low energy value to be…”

Section: Introductionmentioning

confidence: 99%

Optimization of a Bubbling Fluidized Bed Plant for Low-Temperature Gasification of Biomass

et al. 2017

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Investigation into clean energies has been focused on finding an alternative to fossil fuels in order to reduce global warming while at the same time satisfying the world's energy needs. Biomass gasification is seen as a promising thermochemical conversion technology as it allows useful gaseous products to be obtained from low-energy-density solid fuels. Air-steam mixtures are the most commonly used gasification agents. The gasification performances of several biomass samples and their mixtures were compared. One softwood (pine) and one hardwood (chestnut), their torrefied counterparts, and other Spanish-based biomass wastes such as almond shell, olive stone, grape and olive pomaces or cocoa shell were tested, and their behaviors at several different stoichiometric ratios (SR) and steam/air ratios (S/A) were compared. The optimum SR was found to be in the 0.2-0.3 range for S/A = 75/25. At these conditions a syngas stream with 35% of H 2 + CO and a gas yield of 2 L gas/g fuel were obtained, which represents a cold-gas efficiency of almost 50%. The torrefaction process does not significantly affect the quality of the product syngas. Some of the obtained chars were analyzed to assess their use as precursors for catalysts, combustion fuel or for agricultural purposes such as soil amendment.

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“…Among the bio-hydrogen producers, the purple non-sulfur photosynthetic bacteria (PNSB) are regarded as effective in producing hydrogen from different kinds of substrates containing VFAs and sugar [8]. Rhodobacter sphaeroides KKU-PS5 used malate [9] and R. sphaeroides KD131 used succinate to produce hydrogen [10].…”

Section: Introductionmentioning

confidence: 99%

“…In order to overcome these limitations, application of a molecular biology technique, the polymerase chain reaction (PCR), was used in this study to detect the potential genes in the isolates responsible for hydrogen production. Hydrogenase is responsible for the production of hydrogen from organic acids in dark fermentation, while nitrogenase is responsible for the production of hydrogen by PNSB [8,21,22]. Mo nitrogenase consists of a nitrogenase iron (Fe) protein, called dinitrogenase reductase (or nifH) and a nitrogenase molybdenum-iron (MoFe) protein known as dinitrogenase, which consists of two subunits denoted alpha (or nifD) and beta (or nifK) [23,24].…”

Section: Introductionmentioning

confidence: 99%

Photo-fermentational hydrogen production of Rhodobacter sp. KKU-PS1 isolated from an UASB reactor

Assawamongkholsiri

Reungsang

2015

Electronic Journal of Biotechnology

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Background: In this study, the detection of nifH and nifD by a polymerase chain reaction assay was used to screen the potential photosynthetic bacteria capable of producing hydrogen from five different environmental sources. Efficiency of photo-hydrogen production is highly dependent on the culture conditions. Initial pH, temperature and illumination intensity were optimized for maximal hydrogen production using response surface methodology with central composite design. Results: Rhodobacter sp. KKU-PS1 (GenBank Accession No. KC478552) was isolated from the methane fermentation broth of an UASB reactor. Malic acid was the favored carbon source while Na-glutamate was the best nitrogen source. The optimum conditions for simultaneously maximizing the cumulative hydrogen production (H max ) and hydrogen production rate (R m ) from malic acid were an initial of pH 7.0, a temperature of 25.6°C, and an illumination intensity of 2500 lx. H max and R m levels of 1264 ml H 2 /l and 6.8 ml H 2 /L-h were obtained, respectively. The optimum initial pH and temperature were further used to optimize the illumination intensity for hydrogen production. An illumination intensity of 7500 lx gave the highest values of H max (1339 ml H 2 /l) and R m (12.0 ml H 2 /L-h) with a hydrogen yield and substrate conversion efficiency of 3.88 mol H 2 /mol malate and 64.7%, respectively. Conclusions: KKU-PS1 can produce hydrogen from at least 8 types of organic acids. By optimizing pH and temperature, a maximal hydrogen production by this strain was obtained. Additionally, by optimizing the light intensity, R m was increased by approximately two fold and the lag phase of hydrogen production was shortened.

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Recent advances in reuse of waste material as substrate to produce biohydrogen by purple non-sulfur (PNS) bacteria

Cited by 99 publications

References 58 publications

Anodic and cathodic microbial communities in single chamber microbial fuel cells

Anodic and cathodic microbial communities in single chamber microbial fuel cells

Optimization of a Bubbling Fluidized Bed Plant for Low-Temperature Gasification of Biomass

Photo-fermentational hydrogen production of Rhodobacter sp. KKU-PS1 isolated from an UASB reactor

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