Biogenic H2 production from mixed microalgae biomass: impact of pH control and methanogenic inhibitor (BESA) addition

Kumar, Gopalakrishnan; Zhen, Guangyin; Sivagurunathan, Periyasamy; Bakonyi, Péter; Nemestóthy, Nándor; Bélafi–Bakó, Katalin; Kobayashi, Takuro; Xu, Kai

doi:10.18331/brj2016.3.3.6

Cited by 31 publications

(11 citation statements)

References 18 publications

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“…and Sporolactobacillus sp. Y Y Kumar et al [ 34 ] Microalgae H 2 Batch The seed inoculum included BESA addition (1 g/L), pH 5.5 29.5 mL/g VS added – N N Ho et al [ 35 ] Microalgal C. vulgaris FSP - E Ethanol Batch 30 °C, pH 5.0-6.0 11.66 g/L Pure culture of Z. mobilis ATCC 29191 N N This study WAS, potato waste, food waste VFAs Batch 35 ± 1 °C, pH 10.0 343.54 ± 14.63 mg COD/g VS Firmicutes, Chloroflexi , and Proteobacteria Y Y – Not mentioned in literature …”

Section: Resultsmentioning

confidence: 99%

Novel insight into the relationship between organic substrate composition and volatile fatty acids distribution in acidogenic co-fermentation

Zhang

et al. 2017

Biotechnol Biofuels

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BackgroundCo-fermentation is an attractive technology for improving volatile fatty acids (VFAs) production by treatment of solid organic wastes. However, it remains unclear how the composition of different organic matters in solid waste influences the VFAs distribution, microbial community structure, and metabolic pathway during acidogenic co-fermentation. In this study, different organic wastes were added into waste activated sludge (WAS) as co-fermentation substrates to explore the impact of organic matter composition on VFAs pattern and the microbiological mechanism .ResultsAcetate was the most dominant VFA produced in all fermentation groups, making up 41.3–57.6% of the total VFAs produced during acidogenic co-fermentation under alkaline condition. With the increased addition of potato peel waste, the concentrations of propionate and valerate decreased dramatically, while ethanol and butyrate concentrations increased. The addition of food waste caused gradual decreases of valerate and propionate, but ethanol increased and butyrate was relatively stable. Some inconsistency was observed between hydrolysis efficiency and acidification efficiency. Our results revealed that starch was mainly responsible for butyrate and ethanol formation, while lipids and protein favored the synthesis of valerate and propionate. Microbial community analysis by high-throughput sequencing showed that Firmicutes had the highest relative abundance at phylum level in all fermentation groups. With 75% potato peel waste or 75% food waste addition to WAS, Bacilli (72.2%) and Clostridia (56.2%) were the dominant respective classes. In fermentation using only potato peel waste, the Bacilli content was 64.1%, while the Clostridia content was 53.6% in the food-only waste fermentation.ConclusionsAcetate was always the dominant product in acidogenic co-fermentation, regardless of the substrate composition. The addition of carbon-rich substrates significantly enhanced butyrate and ethanol accumulation, while protein-rich substrate substantially benefited propionate and valerate generation. Potato peel waste substantially favored the enrichment of Bacilli, while food waste dramatically increased Clostridia content in the sludge.Electronic supplementary materialThe online version of this article (doi:10.1186/s13068-017-0821-1) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 99%

Novel insight into the relationship between organic substrate composition and volatile fatty acids distribution in acidogenic co-fermentation

Zhang

et al. 2017

Biotechnol Biofuels

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“…Hydrogen is one of the promising energy carriers for modern society [1,2]. Its use has gained increasing attention in the past decades, owing to its high specific energy (142 MJ kg −1 ) [3,4] and its environmental friendliness, i.e., the combustion of hydrogen gives only water as a by-product [5,6]. To date, the industrial production of hydrogen is by chemical conversion of fossil fuels, i.e., natural gas, coal, and oil [7], through processes like hydrocarbon reforming, desulfurization, pyrolysis, plasma reforming, aqueous phase reforming, and ammonia reforming [8].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Hydrogen Production from Chlorella sp. Biomass by Pre-Hydrolysis with Simultaneous Saccharification and Fermentation (PSSF)

et al. 2019

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Simultaneous saccharification and fermentation (SSF) and pre-hydrolysis with SSF (PSSF) were used to produce hydrogen from the biomass of Chlorella sp. SSF was conducted using an enzyme mixture consisting of 80 filter paper unit (FPU) g-biomass−1 of cellulase, 92 U g-biomass−1 of amylase, and 120 U g-biomass−1 of glucoamylase at 35 °C for 108 h. This yielded 170 mL-H2 g-volatile-solids−1 (VS), with a productivity of 1.6 mL-H2 g-VS−1 h−1. Pre-hydrolyzing the biomass at 50 °C for 12 h resulted in the production of 1.8 g/L of reducing sugars, leading to a hydrogen yield (HY) of 172 mL-H2 g-VS−1. Using PSSF, the fermentation time was shortened by 36 h in which a productivity of 2.4 mL-H2 g-VS−1 h−1 was attained. To the best of our knowledge, the present study is the first report on the use of SSF and PSSF for hydrogen production from microalgal biomass, and the HY obtained in the study is by far the highest yield reported. Our results indicate that PSSF is a promising process for hydrogen production from microalgal biomass.

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“…This work demonstrated the merits of exergetic indicators based on the second law of thermodynamics over the single process yield in assessing photobiological hydrogen production. Another example is the production of hydrogen from a biogenic reaction using microalgae biomass . Many aspects should be considered for energy production based on biomass/biofuels, particularly the possibility that additional by‐products will be formed.…”

Section: Introductionmentioning

confidence: 99%

The influence of process parameters on photocatalytic hydrogen production

Bednarczyk

Stelmachowski

Gmurek

2018

Env Prog and Sustain Energy

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High‐efficiency photocatalysts that are synthesized for hydrogen production via photocatalytic water splitting and glycerol conversion without the generation of additional pollutants are presented. Photocatalytic hydrogen production is particular promising because it utilizes glycerol, which is an inexpensive waste from biodiesel production. The main goal of the investigation was the proper selection of photocatalysts based on finding the optimal conditions of the photocatalytic production of hydrogen in the glycerol–water system. TiO2 as well as TiO2 doped with platinum, palladium or gold (0.1, 0.5, 1 wt%), prepared by the photodeposition and sol–gel method, were applied as photocatalysts. The photocatalysts were characterized by X‐ray powder diffraction analysis (XRD). The influences of the preparation methodology, the addition of the doped metal and amount of the doping, radiation intensity, solvent additives, and the amount of photocatalysts on process efficiency were investigated. The efficiency of hydrogen production is high compared to that reported in the literature. It was found that a high yield is impossible without the addition of glycerol or other organic compounds. The hydrogen production exceeded 141 × 103 μmol H2/h·gcat when 0.5 wt% Pt doped TiO2 was used. The novelty of this study is the highest hydrogen productivity obtained at a laboratory scale. The production rate of hydrogen depended on the catalyst concentration, the amount of the noble metal in the catalysts and the glycerol concentration. © 2018 American Institute of Chemical Engineers Environ Prog, 38: 680–687, 2019

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Biogenic H2 production from mixed microalgae biomass: impact of pH control and methanogenic inhibitor (BESA) addition

Cited by 31 publications

References 18 publications

Novel insight into the relationship between organic substrate composition and volatile fatty acids distribution in acidogenic co-fermentation

Novel insight into the relationship between organic substrate composition and volatile fatty acids distribution in acidogenic co-fermentation

Enhancing Hydrogen Production from Chlorella sp. Biomass by Pre-Hydrolysis with Simultaneous Saccharification and Fermentation (PSSF)

The influence of process parameters on photocatalytic hydrogen production

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