Effect of biogas sparging on the performance of bio-hydrogen reactor over a long-term operation

Nualsri, Chatchawin; Kongjan, Prawit; Reungsang, Alissara; Imai, Tsuyoshi

doi:10.1371/journal.pone.0171248

Cited by 16 publications

(5 citation statements)

References 28 publications

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“…This variation of the HRT shifted the metabolism to favor the HY (5.73 mmol H 2 /g COD). Although H 2 does not participate in the production of succinic acid [Equation ()], substrate competition between both routes may result in a lower HY 50

{7 normalC}_{6} H_{12} O_{6} + {6CO}_{2} \to 12 {CH}_{4} H_{6} O_{4} + {6 normalH}_{2} normalO

{ΔG}^{0'} = - 119.28 kJ / mol

…”

Section: Resultsmentioning

confidence: 99%

“…This caused an increase in lactic acid concentration from 24 to 1038 mg COD/L in the author's study. Although H 2 is not produced or consumed in the conversion of glucose to lactic acid [Equation (3)], substrate competition between these pathways results in lower HY values, 50 as observed in the production of succinic acid. On the other T A B L E 3 Comparison between the HSu yields of the reactors in the present study and those in the literature using pure cultures…”

Section: Fermentative Performance Of the Afbrsmentioning

confidence: 99%

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Improved dark fermentation of cane molasses in mesophilic and thermophilic anaerobic fluidized bed reactors by selecting operational conditions

et al. 2020

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{7 normalC}_{6} H_{12} O_{6} + {6CO}_{2} \to 12 {CH}_{4} H_{6} O_{4} + {6 normalH}_{2} normalO

{ΔG}^{0'} = - 119.28 kJ / mol

…”

Section: Resultsmentioning

confidence: 99%

Section: Fermentative Performance Of the Afbrsmentioning

confidence: 99%

Improved dark fermentation of cane molasses in mesophilic and thermophilic anaerobic fluidized bed reactors by selecting operational conditions

et al. 2020

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show abstract

“…Sparging biogas from the CH 4 stage, which mainly consisted of CO 2 and CH 4 , could reduce the H 2 partial pressure in the H 2 stage and thus improve the H 2 yield [90][91][92][93]. On the other hand, it was observed that injection of CO 2 into the H 2 stage of a pilot-scale twostage system increased VFA production [94], which might lead to pH drop and unstable H 2 production.…”

Section: Biogas Recirculationmentioning

confidence: 99%

Critical Review on Two-Stage Anaerobic Digestion with H2 and CH4 Production from Various Wastes

Zheng,

2024

Water

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Anaerobic digestion (AD) is a promising method for resource recovery from various wastes. Compared to the conventional single-stage AD process, a two-stage AD process with separate H2 and CH4 production provides higher energy recovery efficiency and enhanced operation stability. The stage separation makes it possible to apply optimal conditions for different functional microorganisms in their respective stages. This review elaborates the mechanisms of the two-stage AD process and evaluates recent research trends on this topic. A comprehensive comparison between single- and two-stage AD processes is made from the perspective of biogas production, organics degradation, energy recovery, and operation stability. The main influence factors on the two-stage AD process are discussed, including substrates, inoculum, and operation parameters, such as pH, temperature, etc. Upgrading technologies for the two-stage AD process are assessed. The microbial communities in the two-stage AD process for treating different substrates and the influence factors on microbial systems are also summarized. Furthermore, future research opportunities for enhancing the application of this technology are highlighted.

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“…Apart from the mentioned 1G and 2G wastes, there are some intermediate substrates produced in sugarcane processing industry which can be used for two-stage AD processes, like crushed cane (2G) and sugar syrup (1G). Very few studies have been carried out using these wastes [106,107].…”

Section: Energy Balance Of Single-stage Vs Two-stage Anaerobic Digest...mentioning

confidence: 99%

Critical Assessment of Hydrogen and Methane Production from 1G and 2G Sugarcane Processing Wastes Using One-Stage and Two-Stage Anaerobic Digestion

2023

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Sugarcane is a lignocellulosic crop which is used to produce sugar in sugarcane processing industries. Globally, sugarcane processing industries generate solid and liquid wastes amounting to more than 279 million tons per annum and by-products; namely, trash, bagasse, mill mud, and molasses. The valorisation of waste and by-products has recently increased and is playing a significant role in achieving policies and goals associated with circular bioeconomy and sustainable development. For the valorisation of sugarcane processing industry waste and by-products, a number of technologies are well established and in use, while other innovative technologies are still ongoing through research and development with promising futures. These by-products obtained from sugarcane processing industries can be converted into biofuels like hydrogen and methane via anaerobic digestion. Molasses belongs to the first-generation (1G) waste, while trash, bagasse, and mill mud belong to second-generation (2G) waste. Various studies have been carried out in converting both first- and second-generation sugarcane processing industry wastes into renewable energy, exploiting anaerobic digestion (AD) and dark fermentation (DF). This review emphasises the various factors affecting the AD and DF of 1G and 2G sugarcane processing industry wastes. It also critically addresses the feasibility and challenges of operating a two-stage anaerobic digestion process for hydrogen and methane production from these wastes.

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Effect of biogas sparging on the performance of bio-hydrogen reactor over a long-term operation

Cited by 16 publications

References 28 publications

Improved dark fermentation of cane molasses in mesophilic and thermophilic anaerobic fluidized bed reactors by selecting operational conditions

Improved dark fermentation of cane molasses in mesophilic and thermophilic anaerobic fluidized bed reactors by selecting operational conditions

Critical Review on Two-Stage Anaerobic Digestion with H2 and CH4 Production from Various Wastes

Critical Assessment of Hydrogen and Methane Production from 1G and 2G Sugarcane Processing Wastes Using One-Stage and Two-Stage Anaerobic Digestion

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