The role of pH control on biohydrogen production by single stage hybrid dark- and photo-fermentation

Zagrodnik, Roman; Laniecki, M.

doi:10.1016/j.biortech.2015.07.028

Cited by 86 publications

(19 citation statements)

References 34 publications

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“…This result in agreement with other studies which reported optimum pH of 5.2 and 5.5 during glucose fermentation for C. butyricum and Clostridium felsineum , respectively. Zagrodnike and Laniecki studied the effect of pH on biohydrogen production in three different processes: dark fermentation, photofermentation and hybrid process in a single stage. These authors reported that pH control has favored hydrogen production in all these processes.…”

Section: Resultsmentioning

confidence: 99%

Influence of heat pre‐treated inoculum and pH control on the hydrogen production by microbial consortium

Romão

Silva

Costa

et al. 2017

Env Prog and Sustain Energy

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The production of hydrogen by biological route can be affected by various parameters. This work evaluated the influence of pH control during the fermentation process and the application of different inoculum heat pre-treatment in the production of biohydrogen using cheese whey permeate as a substrate. The tested pH values were 5.5 and 6.5, and the thermal pre-treatment was 508 C for 15 days and 938C for 15 min. Results indicated that when the fermentation was controlled at pH 5.5 responses productivity and yield were, 129.33 (mmol H 2 /day L) and 4.04 (mol H 2 /mol substrate consumed), respectively. These results were higher compared with those obtained in the fermentation without pH control and pH controlled at 6.5. Regarding to the most efficient treatment was the thermal shock of 938C for 15 min, maintaining the fermentation temperature at 308C. Under this condition, the synthesis of hydrogen was faster and the maximum production was achieved in 25 h of process (128.82 mmol H 2 /day L), while the maximum production of the assay using non-treated inoculum was attained in 43 h (109.14 mmol H 2 /day L).

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Section: Resultsmentioning

confidence: 99%

Influence of heat pre‐treated inoculum and pH control on the hydrogen production by microbial consortium

Romão

Silva

Costa

et al. 2017

Env Prog and Sustain Energy

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“…Different quality K 2 HPO 4 and KH 2 OP 4 were used as a buffer, and 75 mL photo-fermentation medium was also added into the bottle. On the control experiment, C 6 H 8 O 7 and Na 3 C 6 H 5 O 7 · 2H 2 O were used as a buffer. The control buffer's initial pH was adjusted to 7.0 by KOH.…”

Section: Experimental Designmentioning

confidence: 99%

“…At present, the production of hydrogen by microbial fermentation is mainly concentrated on the two aspects of anaerobic dark fermentation and photofermentation hydrogen production [7]. Because photo-fermentation hydrogen production has the advantages of extensive raw material resources and thorough substrate utilization, it has become a major research direction of hydrogen production technology at home and abroad [8].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of pH values stability and photo-fermentation biohydrogen production by phosphate buffer

Guo

Wang

et al. 2020

Bioengineered

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The main aim of this study was to investigate the effects of the initial pH values of the buffer on photofermentation biohydrogen production. Hydrogen production and the kinetics of it under different initial pH values were analyzed. Effects of initial pH values on reducing sugar consumption, hydrogen production rate, and byproduct production were evaluated at initial pH values of 5-7. The results showed that initial pH values of phosphate buffer had a significant effect on biohydrogen production via photo-fermentation. With the initial pH value of phosphate buffer at 6.0, the cumulative hydrogen production reached its maximum, 569.6 mL. The maximum hydrogen production rate was 23.96 mL/h at the initial pH value of 6.5. With the initial pH values at 5.0 and 7.5, the maximum hydrogen production rates were becoming lower, only 5.59 mL/h and 5.42 mL/h, respectively. And with the increase in pH values, the peak period of hydrogen production was gradually delayed, indicating that the alkaline environment had a negative effect on the ability of photosynthetic bacteria. This study revealed the influence of phosphate buffer initial pH values on the biohydrogen production via photo-fermentation and aimed to provide a scientific reference for further improving the theory and technology for biohydrogen production from biomass. ARTICLE HISTORY

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“…Besides cleaner electrochemical processes, numerous production methods have been studied to look for a more sustainable production system such as thermochemical processes using biomass, gasification, and pyrolysis and biological processes by dark and photofermentation using bacteria and microalgae. If we consider solar energy as a front‐running clean, abundant, and secure energy source, some researchers have faced the increasing demand for energy by proposing a photocatalytic hydrogen production process as a way to store solar energy as chemical energy …”

Section: Introductionmentioning

confidence: 99%

“…However, one of the barriers to the expansion of the use of hydrogen is its current unsustainable production process,w hich is mainly based on fossil fuels;t he steam reforming of methane and the gasification of coal share 96 %o fthe world market. [1] Besides cleaner electrochemical processes, [2][3][4][5][6] numerous productionm ethods have been studied to look for am ore sustainable productions ystem such as thermochemical processes using biomass,g asification, [7][8][9][10][11][12][13] and pyrolysis [14][15][16][17][18] and biological processesb yd ark [19][20][21][22][23] and photofermentation [20,[24][25][26][27] using bacteria and microalgae.I fw ec onsider solar energy as af ront-running clean, abundant, and secure energy source,s omer esearchers have faced the increasing demand for energy by proposing ap hotocatalytic hydrogen productionp rocess [28][29][30] as aw ay to store solar energya s chemical energy. [31] Factors affecting photocatalytic hydrogen generation Most studies in the field of photocatalysis are focusedo nt he synthesis,c haracterization of properties,a nd testing of nanomaterials able to catalyze the degradation of pollutants, [32][33][34][35][36][37][38][39]…”

Section: Introduction Hydrogen Role In Energy Scenariomentioning

confidence: 99%

Operational Conditions Affecting Hydrogen Production by the Photoreforming of Organic Compounds using Titania Nanoparticles with Gold

et al. 2018

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Several factors affect photocatalytic hydrogen productivity from the photoreforming of organic compounds, which makes it difficult to optimize operational conditions in photoreactors. To prioritize these factors, we focused on the quantification of the effect of five of them on hydrogen production. Photocatalytic experiments were performed on 67 mL batch photoreactors under UV‐LED lamps (λ=375 nm) using a suspension of TiO2–Au nanoparticles synthesized by a sol–gel approach. The analyzed factors were: (A) presence of Au as a cocatalyst, (B) type of alcohol as the electron donor, (C) intensity of UV light, (D) electron donor concentration, and (E) nanoparticle concentration. A main and interaction effects analysis is presented with reduced fixed effect models for three responses: total hydrogen generation, catalyst productivity, and electron donor productivity. The presence of Au as a cocatalyst (A), the intensity of UV light (C), and their interaction (AC) were the factors with the highest effect. The best configuration allowed us to reach a catalyst productivity of 2925 μmolnormalH2 g−1 h−1.

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The role of pH control on biohydrogen production by single stage hybrid dark- and photo-fermentation

Cited by 86 publications

References 34 publications

Influence of heat pre‐treated inoculum and pH control on the hydrogen production by microbial consortium

Influence of heat pre‐treated inoculum and pH control on the hydrogen production by microbial consortium

Enhancement of pH values stability and photo-fermentation biohydrogen production by phosphate buffer

Operational Conditions Affecting Hydrogen Production by the Photoreforming of Organic Compounds using Titania Nanoparticles with Gold

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