A critical review on inhibition of dark biohydrogen fermentation

Elbeshbishy, Elsayed; Dhar, Bipro Ranjan; Nakhla, George; Lee, Hyung-Sool

doi:10.1016/j.rser.2017.05.075

Cited by 347 publications

(123 citation statements)

References 185 publications

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“…Ding et al [12] used food waste and applied hydrothermal pretreatment for 20 min at 100, 120, 140, 160, 180, and 200 • C. They found that HTP temperature exceeding 160 • C resulted in a sharp decrease in VFAs. However, in our experiment, the point where VFA concentrations began to decline was 210 • C. Therefore, it can be concluded that HTP at temperatures higher than 210 • C does not necessarily lead to higher VFAs production as many inhibitors, such as the formation of melanoid, might have affected the process [40].…”

Section: Volatile Fatty Acids Productioncontrasting

confidence: 52%

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Effect of Hydrothermal Pretreatment on Volatile Fatty Acids Production from Source-Separated Organics

et al. 2019

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The current study investigates the effect of hydrothermal pretreatment (HTP) on acidification of source-separated organics (SSO) in terms of volatile fatty acids (VFAs) production and solubilization. Temperature and retention time for HTP of SSO ranged from 150 to 240 • C and 5 to 30 min, respectively. The soluble substance after hydrothermal pretreatment initially increased, reaching its peak at 210 • C and then declined gradually. The highest overall chemical oxygen demand (COD) solubilization of 63% was observed at "210 • C-20 min" compared to 17% for raw SSO. The highest VFAs yield of 1536 mg VFAs/g volatile suspended solids (VSS) added, was observed at "210 • C-20 min" compared to 768 mg VFAs/g VSS for raw SSO. Intensification of hydrothermal pretreatment temperature beyond 210 • C resulted in the mineralization of the organics and adversely affected the process.

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Section: Volatile Fatty Acids Productioncontrasting

confidence: 52%

“…However, in our experiment, the point where VFA concentrations began to decline was 210 °C. Therefore, it can be concluded that HTP at temperatures higher than 210 °C does not necessarily lead to higher VFAs production as many inhibitors, such as the formation of melanoid, might have affected the process [40].…”

Section: Volatile Fatty Acids Productionmentioning

confidence: 99%

Effect of Hydrothermal Pretreatment on Volatile Fatty Acids Production from Source-Separated Organics

et al. 2019

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“…A very appealing course of action is the application of biological processes to the production of fuels (Hallenbeck and Ghosh, 2009). Hydrogen appears as one of the best alternatives for two reasons: i) the only by-product of its combustion is water (Ghimire et al, 2015), and ii) its energy content per unit mass is the highest, reaching 122 kJ/g, a value approximately 2.75 times higher than that of conventional hydrocarbon fuels (Elbeshbishy et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Fermentative biohydrogen production from a novel combination of vermicompost as inoculum and mild heat-pretreated fruit and vegetable waste

2019

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Please cite this article as: Pascualone M.J., Gómez Costa M.B., Dalmasso P.R. Fermentative biohydrogen production from a novel combination of vermicompost as inoculum and mild heat-pretreated fruit and vegetable waste. Keywords: Biohydrogen Dark fermentation Fruit and vegetable waste Vermicompost Mild heat-pretreated substrateThis study reports for the first time on biohydrogen production by dark fermentation using a novel combination of mild heatpretreated fruit and vegetable waste (FVW) as raw material and vermicompost as an economical source of hydrogen-producing bacteria. A suspension rich in reducing sugars obtained from FVW was used at different initial concentrations (5 to 25 g reducing sugars/L) during the bioprocess conducted in batch reactors at mesophilic temperature of 35 °C. The use of a mild heat-pretreated substrate and the consequent elimination of the natural microbiota present in the FVW led to higher hydrogen production than the control. Clostridium species, hydrogen-producing bacteria via butyric acid fermentation pathway, were the dominant microorganisms in the bioprocess. Hydrogen production, volumetric hydrogen production rate, and pretreated substrate degradation efficiency (63.0 mL/g VS, 372.6 mL/L/d, and 50% BOD5, respectively) obtained in the experiments performed with the highest substrate concentration demonstrated that the developed bioprocess was promising simultaneously leading to high hydrogen contents in biogas and high substrate removal efficiencies.

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“…Biohydrogen production and purification yield were assumed as 0.03 t/t_VS_fw [13,37], this is close to the maximum hydrogen yield. This was chosen, in order to discuss the huge effort in recent years regarding the biohydrogen production optimization from organic wastes by dark fermentation [16,[47][48][49][50][51][52]. Purified hydrogen was assumed to be sold to the grid at a price of 1800 USD/t [26], to make it competitive versus natural gas-based hydrogen.…”

Section: Dark Fermentationmentioning

confidence: 99%

Increasing Profits in Food Waste Biorefinery—A Techno-Economic Analysis

Bastidas‐Oyanedel

Schmidt

2018

Energies

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The present manuscript highlights the economic profit increase when combining organic waste anaerobic digestion with other mixed culture anaerobic fermentation technologies, e.g., lactic acid fermentation and dark fermentation. Here we consider the conversion of 50 tonnes/day of food waste into methane, power generation (from CHP of biomethane), lactic acid, polylactic acid, hydrogen, acetic acid and butyric acid. The economic assessment shows that the basic alternative, i.e., anaerobic digestion with methane selling to the grid, generates 19 USD/t_VS (3 USD/t_foodwaste) of profit. The highest profit is obtained by dark fermentation with separation and purification of acetic and butyric acids, i.e., 296 USD/t_VS (47 USD/t_foodwaste). The only alternative that presented losses is the power generation alternative, needing tipping fees and/or subsidy of 176 USD/t_VS (29 USD/t_foodwaste). The rest of the alternatives generate profit. From the return on investment (ROI) and payback time, the best scenario is the production of polylactic acid, with 98% ROI, and 7.8 years payback time. Production of butyric acid ROI and payback time was 74% and 9.1 years.

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A critical review on inhibition of dark biohydrogen fermentation

Cited by 347 publications

References 185 publications

Effect of Hydrothermal Pretreatment on Volatile Fatty Acids Production from Source-Separated Organics

Effect of Hydrothermal Pretreatment on Volatile Fatty Acids Production from Source-Separated Organics

Fermentative biohydrogen production from a novel combination of vermicompost as inoculum and mild heat-pretreated fruit and vegetable waste

Increasing Profits in Food Waste Biorefinery—A Techno-Economic Analysis

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