Continuous dark fermentative hydrogen production by mesophilic microflora: Principles and progress

Hawkes, Freda R.; Hussy, Ines; Kyazze, Godfrey; Dinsdale, Richard M.; Hawkes, D.L.

doi:10.1016/j.ijhydene.2006.08.014

Cited by 630 publications

(344 citation statements)

References 94 publications

(165 reference statements)

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“…The high HBu/HAc ratio indicated an efficient biohydrogen generation system, since efficient hydrogen production is usually associated with high HBu production. Similar findings were reported in other studies as well (Lin and Chang, 1999;Chen et al, 2002;Lin et al, 2006;Demirbas, 2007;Hawkes et al, 2007).…”

Section: Smp Distributionsupporting

confidence: 92%

“…In addition to the importance of seed pretreatment, it is also known that biotechnological hydrogen formation is influenced by the environmental conditions applied. Among them, temperature, pH and substrate concentration are most crucial (Hawkes et al, 2007;Wang and Wan, 2009a). Therefore, these factors must carefully be optimized to improve hydrogen generation e.g.…”

Section: Introductionmentioning

confidence: 99%

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Improved microbial conversion of de-oiled Jatropha waste into biohydrogen via inoculum pretreatment: process optimization by experimental design approach

et al. 2015

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Improved microbial conversion of de-oiled Jatropha waste into biohydrogen via inoculum pretreatment: process optimization by experimental design approach In this study various pretreatment methods of sewage sludge inoculum and the statistical process optimization of de-oiled jatropha waste have been reported. Peak hydrogen production rate (HPR) and hydrogen yield (HY) of 0.36 L H2/L-d and 20 mL H2/g Volatile Solid (VS) were obtained when heat shock pretreatment (95 o C, 30 min) was employed. Afterwards, an experimental design was applied to find the optimal conditions for H2 production using heat-pretreated seed culture. The optimal substrate concentration, pH and temperature were determined by using response surface methodology as 205 g/L, 6.53 and 55.1 o C, respectively. Under these circumstances, the highest HPR of 1.36 L H2/L-d was predicted. Verification tests proved the reliability of the statistical approach. As a result of the heat pretreatment and fermentation optimization, a significant (~ 4 folds) increase in HPR was achieved. PCR-DGGE results revealed that Clostridium sp. were majorly present under the optimal conditions. Kumar et al. / Biofuel Research Journal 5 (2015) 209-214 Please cite this article as: Kumar G., Bakonyi P., Sivagurunathan P., Nemestóthy N., Bélafi-Bakó K., Lin C.Y. Improved microbial conversion of de-oiled Jatropha waste into biohydrogen via inoculum pretreatment and process optimization by experimental design approach. Biofuel Research Journal 5 (2015) 209-214.

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Section: Smp Distributionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Improved microbial conversion of de-oiled Jatropha waste into biohydrogen via inoculum pretreatment: process optimization by experimental design approach

et al. 2015

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“…[13]; however some organisms of no utility (e.g. propionic acid and homoacetogenic bacteria) may also survive and reclaim their niche over time [21,25].…”

Section: Pretreatment and Stimulationmentioning

confidence: 99%

“…The establishment of continuous flow bioreactors usually starts in batch mode, and it is to note that successful transition and reliable, long-term operation is highly influenced by the start-up strategy applied [12][13][14]. However, up to the authors' best knowledge, there is no recent review paper comprehensively surveying start-up experiences in continuous hydrogen producing bioreactors.…”

Section: Introductionmentioning

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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“…Some of these methods include electrolysis, reformation of hydrocarbons and microbiological methods. Many of these methods for generating hydrogen are difficult to use on a large scale because of the large amounts of energy required to produce the gas (Lee et al, 2004;2009;Hawkes et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

A New Development in Biological Process for Wastewater Treatment to Produce Renewable Fuel

Mongia¹

2010

American Journal of Applied Sciences

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Problem statement:Hydrogen is a clean energy source. Bio-conversion of biomass to generate hydrogen has been achieved using anaerobic fermentation of some well-defined materials, in wastewater. No data available on hydrogen yielded from wastewater using inoculum extracted from Iraqi municipal wastewater treatment plant. Approach: This study investigated the effects of substrate concentration, initial pH and process temperature on biohydrogen production from surgery wastewater using anaerobic batch reactor. Batch tests are carried out in a 2.0 L batch reactor under different temperatures of 34, 36, 38and 40°C, various initial pH of 4.5, 5.5 and 6.5 and substrate concentrations of 5, 10 and 15%. The raw seed was compost sludge obtained from municipal wastewater treatment plant in Baghdad (Al-Restomia plant). The volume of evolved gas was measured at room temperature by the water displacement method. Results: The maximum hydrogen production 160 mL L −1 is obtained at an optimum temperature of 38 °C, optimum pH of 5.5 and substrate concentration 15%. Conclusion:The results indicated that the use of compost of Al-Restomia plant as a seed in anaerobic fermentation process has given excellent biogas production under applied conditions.

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Continuous dark fermentative hydrogen production by mesophilic microflora: Principles and progress

Cited by 630 publications

References 94 publications

Improved microbial conversion of de-oiled Jatropha waste into biohydrogen via inoculum pretreatment: process optimization by experimental design approach

Improved microbial conversion of de-oiled Jatropha waste into biohydrogen via inoculum pretreatment: process optimization by experimental design approach

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

A New Development in Biological Process for Wastewater Treatment to Produce Renewable Fuel

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