Biohydrogen production improvement using hot compressed water pretreatment on sake brewery waste

Choiron, Miftahul; Tojo, Seishu; Chosa, Tadashi

doi:10.1016/j.ijhydene.2020.04.199

Cited by 25 publications

(7 citation statements)

References 73 publications

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“…For instance, hot compressed water was used to pre-treat sake brewery waste (sake lees). Compressed hot water at a high temperature of 130 • C and pressure of 3 bars was used to treat 10% biomass at a holding time of 1 h [56]. A reduction in lag time for biohydrogen generation was reported as a result of pre-treatment.…”

Section: Substrate Pre-treatment To Enhance Biohydrogen Productionmentioning

confidence: 99%

Intensification of Acidogenic Fermentation for the Production of Biohydrogen and Volatile Fatty Acids—A Perspective

et al. 2022

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Utilising ‘wastes’ as ‘resources’ is key to a circular economy. While there are multiple routes to waste valorisation, anaerobic digestion (AD)—a biochemical means to breakdown organic wastes in the absence of oxygen—is favoured due to its capacity to handle a variety of feedstocks. Traditional AD focuses on the production of biogas and fertiliser as products; however, such low-value products combined with longer residence times and slow kinetics have paved the way to explore alternative product platforms. The intermediate steps in conventional AD—acidogenesis and acetogenesis—have the capability to produce biohydrogen and volatile fatty acids (VFA) which are gaining increased attention due to the higher energy density (than biogas) and higher market value, respectively. This review hence focusses specifically on the production of biohydrogen and VFAs from organic wastes. With the revived interest in these products, a critical analysis of recent literature is needed to establish the current status. Therefore, intensification strategies in this area involving three main streams: substrate pre-treatment, digestion parameters and product recovery are discussed in detail based on literature reported in the last decade. The techno-economic aspects and future pointers are clearly highlighted to drive research forward in relevant areas.

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Section: Substrate Pre-treatment To Enhance Biohydrogen Productionmentioning

confidence: 99%

Intensification of Acidogenic Fermentation for the Production of Biohydrogen and Volatile Fatty Acids—A Perspective

et al. 2022

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“…Temperature has an important influence on product output, according to research, since enthalpies, particularly those of H2 and CH4, were associated with development factors. It has been also claimed that in the HTG process, quicker heating rates are required to prevent downsides such as reactor blocking [17]. Considering all of this in mind, the HTG process was kept at a temperature varying from 290 -450 °C.…”

Section: Influence Of Temperature On Product Distributionmentioning

confidence: 99%

Studies on Influence of Process Parameters in Upgradation of Bio-oil Derived from HTL of Domestic household waste: Application of Response Surface Methodology

2022

Global NEST: The International Journal

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<p>This research focuses on hydrothermal gasification (HTG) and hydrothermal liquefaction (HTL) studies to produce bio-hydrogen from domestic mixed waste. HTG and HTL studies were studied at temperatures of 300–450°C and 300–400°C, correspondingly, with a catalyst level of 6 wt %. The sol-gel technique was used to make the Bentonite/Nb-TiO2 catalyst. For a solvent-waste proportion of 14 millilitre/gram, an C2H5OH - water proportions of 2:2, and a period of one-hour, maximum H2 output from HTL was 30 wt % (catalyst loads: 4 wt %) and HTG was 40 wt % (catalyst loads: 5 wt %). As C2H5OH acts as half-solvent and ideal solvent to bio-mass capacity it shot up H2 result in the HTG procedure by methanation, gas water shift and improving responses in the organization. The second output of the HTL procedure was bio-oil, which yielded 35 wt % with O/C as well as H/C standards of 1.2 and 1.0, respectively, and an HHV of 42 Mega Joule/kilogram. In the HTL system, mechanistic procedures such depolymerization, hydration, reduction, and hydrolysis generated in a larger proportion of gaseous product. Thermal and the solvent-to-waste proportion is the ideal factors in the H2 synthesis procedure, according to experimental analysis. Energy nexuses from domestic mixed trash are taken over in this research.</p>

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“…Nitrogen gas was filled into the headspace of the HCW device to create a pressurized condition, and an automatic electric jacket heater was covered to increase temperature. This pretreatment method was adapted from [33], which is similar to NED (Nitrogen Explosive Decompression) method by [34].…”

Section: Pretreatmentmentioning

confidence: 99%

Effect of Natural Buffer on Biohydrogen Production

Choiron

Tojo

Chosa

2021

jti

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Hydrogen is the promising ideal energy carrier with no emission but water on its combustible in the next generation. Hydrogen production using biological methods is greener than other methods using fossil fuel. One of the major factors affecting the operation of biohydrogen production is pH level in bioreactors. Restrain of declining pH is expected to increase hydrogen production. Pretreatment is one key factor in successful biohydrogen fermentation using mixed microbes. This study aims to investigate the natural buffer effect on biohydrogen using hot compressed water pretreatment. This batch fermentation experiment was operated in a 110 mL glass reactor with 3.75 g/L glucose as substrate. Mixed culture was obtained from cow dung compost treated with hot compressed water pretreatment at 150 ºC, 0.5 MPa for 40 minutes. Fine dried eggshell powder and calcinated eggshell were added with 1 g/L, 3 g/L, and 5 g/L concentrations as buffer agents. The result showed that the addition of 1 g/L eggshell obtained the highest hydrogen production rate of 0.92 mol H2/mol glucose. Butyric acid and acetic acid are recognized as an indicator of hydrogen production and the Butyric/Acetic molar ratio over 2.6 as efficient biohydrogen fermentation. The highest B/A ratio in this experiment was 4.62 on 3g/L addition of eggshell powder.

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Biohydrogen production improvement using hot compressed water pretreatment on sake brewery waste

Cited by 25 publications

References 73 publications

Intensification of Acidogenic Fermentation for the Production of Biohydrogen and Volatile Fatty Acids—A Perspective

Intensification of Acidogenic Fermentation for the Production of Biohydrogen and Volatile Fatty Acids—A Perspective

Studies on Influence of Process Parameters in Upgradation of Bio-oil Derived from HTL of Domestic household waste: Application of Response Surface Methodology

Effect of Natural Buffer on Biohydrogen Production

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