Hydrogen and methane potential based on the nature of food waste materials in a two-stage thermophilic fermentation process

Chu, Chun Feng; Xu, Kai; Li, Yu You; Inamori, Yuhei

doi:10.1016/j.ijhydene.2012.04.048

Cited by 74 publications

(22 citation statements)

References 31 publications

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“…In the future energy economy, hydrogen will play an important role as a clean, CO 2 -neutral energy for use as a substitute for fossil fuels [2]. Various attempts have been made to produce biohydrogen as alternative renewable energy from wastewater and solid waste via photofermentation [3], dark hydrogen fermentation [4] and combined fermentation [3,5]. Dark hydrogen fermentation is considered more feasible because it could achieve a much higher hydrogen production rate than that obtained from photofermentation [6].…”

Section: Introductionmentioning

confidence: 99%

Improvement of biohydrogen production using a reduced pressure fermentation

Kisielewska

Dębowski

Zieliński

2015

Bioprocess Biosyst Eng

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This study investigated the effect of reduced pressure on biohydrogen production in an upflow anaerobic sludge blanket (UASB) reactor from whey permeate. The results showed that the reduced pressure fermentation was more effective in enhancing biohydrogen production than dark fermentative hydrogen production at atmospheric pressure. Mesophilic fermentative biohydrogen production was investigated at a constant hydraulic retention time (HRT) of 24 h and increasing organic loading rates (OLRs) of 20, 25, 30, 35 kg COD/m(3) day. The reduced pressure fermentation was successfully operated at all OLRs tested. The maximum proportion of hydrogen in biogas of 47.7 %, volumetric hydrogen production rate (VHPR) of 7.10 L H2/day and hydrogen yield of 4.55 mol H2/kg COD removed occurred at the highest OLR. Increase in OLR affected the hydrogen production in UASB reactor exploited at atmospheric pressure. The reduced pressure process was able to remarkably improve the biohydrogen performance at high OLRs.

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Section: Introductionmentioning

confidence: 99%

Improvement of biohydrogen production using a reduced pressure fermentation

Kisielewska

Dębowski

Zieliński

2015

Bioprocess Biosyst Eng

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“…Thus under all conditions, hydrolytic bacterial mixture proved effective in enhancing the processes for generating bioenergy. Secondly, the split of H 2 stage and CH 4 stage allowed us to overcome the problem of H 2 -energy transfer [8,23]. These findings provide an evidence that hydrolysate of organic matter can be easily converted into bioproducts of high economic values.…”

Section: Discussionmentioning

confidence: 80%

“…Another primary reason for low or no evolution of H 2 during AD is the feedback inhibition of H 2 process by high partial pressure of H 2 . Studies to investigate H 2 and CH 4 potential of different biowastes have been evaluated under different physiological conditions [8][9][10][11][12][13]. It is difficult to produce H 2 from biowaste, since it is invariably accompanied by inherent microflora, which out number the H 2 -producing bacteria [8,14].…”

Section: Introductionmentioning

confidence: 99%

Ecobiotechnological Strategy to Enhance Efficiency of Bioconversion of Wastes into Hydrogen and Methane

et al. 2014

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Vegetable wastes (VW) and food wastes (FW) are generated in large quantities by municipal markets, restaurants and hotels. Waste slurries (250 ml) in 300 ml BOD bottles, containing 3, 5 and 7 % total solids (TS) were hydrolyzed with bacterial mixtures composed of: Bacillus, Acinetobacter, Exiguobacterium, Pseudomonas, Stenotrophomonas and Sphingobacterium species. Each of these bacteria had high activities for the hydrolytic enzymes: amylase, protease and lipase. Hydrolysate of biowaste slurries were subjected to defined mixture of H 2 producers and culture enriched for methanogens. The impact of hydrolysis of VW and FW was observed as 2.6-and 2.8-fold enhancement in H 2 yield, respectively. Direct biomethanation of hydrolysates of VW and FW resulted in 3.0-and 1.15-fold improvement in CH 4 yield, respectively. A positive effect of hydrolysis was also observed with biomethanation of effluent of H 2 production stage, to the extent of 1.2-and 3.5-fold with FW and VW, respectively. The effective H 2 yields were 17 and 85 l/kg TS fed, whereas effective CH 4 yields were 61.7 and 63.3 l/kg TS fed, from VW and FW, respectively. This ecobiotechnological strategy can help to improve the conversion efficiency of biowastes to biofuels.

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“…During biohydrogen production process, not only is H 2 produced as the main product but also volatile fatty acids (VFAs) and alcohols occurred as byproducts (Wei et al 2010). These byproducts can be used as a substrate for biomethane production (Chu et al 2012). Therefore, biohydrogen and biomethane production by a two-stage fermentation process has been applied and developed at present (Luo et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Enhanced thermophilic bioenergy production from food waste by a two-stage fermentation process

Wongthanate

Mongkarothai

2018

Int J Recycl Org Waste Agricult

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Purpose The objective of research was emphasized on the optimal conditions (initial pH and C/N ratio) for enhancing bioenergy from food waste by a two-stage fermentation process. Methods Bioenergy production from food waste was operated by mixed culture under thermophilic temperature in batch reactor. Thermophilic biohydrogen production was optimized in terms of initial pH (5.0-9.0) and then was optimized in terms of C/N ratio (10-50) in the first stage. After that, thermophilic biomethane production was optimized in terms of initial pH (6.0-10.0) in the second stage. Results The results revealed that the thermophilic biohydrogen production from food waste at an initial pH 7.0 presented the maximum hydrogen yield of 176.10 mL H 2 /g COD. At this optimal initial pH, the maximum hydrogen yield of 214.88 mL H 2 /g COD was achieved at C/N ratio 30. Subsequently, the effluent from the first stage of thermophilic biohydrogen production from food waste under the optimal initial pH of 7.0 and the optimal C/N ratio of 30 was used as a substrate in the second stage of thermophilic biomethane production. Thermophilic biomethane production from hydrogen fermentation effluent provided the maximum methane yield of 310.77 mL CH 4 /g COD at initial pH 7.0. At these optimal conditions, COD removal was achieved at 70-90%. Conclusion Therefore, a two-stage thermophilic fermentation process could effectively enhance biohydrogen and biomethane production, including reduction of organic waste at the same time.

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Hydrogen and methane potential based on the nature of food waste materials in a two-stage thermophilic fermentation process

Cited by 74 publications

References 31 publications

Improvement of biohydrogen production using a reduced pressure fermentation

Improvement of biohydrogen production using a reduced pressure fermentation

Ecobiotechnological Strategy to Enhance Efficiency of Bioconversion of Wastes into Hydrogen and Methane

Enhanced thermophilic bioenergy production from food waste by a two-stage fermentation process

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