Optimization and modelling of dark fermentative hydrogen production from cheese whey by Enterobacter aerogenes 2822

Rao, Raman; Basak, Nitai

doi:10.1016/j.ijhydene.2020.10.142

Cited by 52 publications

(15 citation statements)

References 96 publications

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“…The optimum hydrogen production was obtained at pH 5.5. Some facultative anaerobic bacteria (e.g., Enterobacter aerogenes) have also been recognized as H 2 producers since the hydrogenase enzyme was found in these bacteria [106]. The critical parameters, such as substrate concentration, temperature, pH, inoculum size, and yeast extract, were optimized to obtain a maximum H 2 yield of 0.21 L H 2 /g glucose.…”

Section: Diversity Of Biohydrogen-producing Bacteriamentioning

confidence: 99%

Biohydrogen—A Green Fuel for Sustainable Energy Solutions

Kanwal

Torriero

2022

Energies

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Energy plays a crucial role in the sustainable development of modern nations. Today, hydrogen is considered the most promising alternative fuel as it can be generated from clean and green sources. Moreover, it is an efficient energy carrier because hydrogen burning only generates water as a byproduct. Currently, it is generated from natural gas. However, it can be produced using other methods, i.e., physicochemical, thermal, and biological. The biological method is considered more environmentally friendly and pollution free. This paper aims to provide an updated review of biohydrogen production via photofermentation, dark fermentation, and microbial electrolysis cells using different waste materials as feedstocks. Besides, the role of nanotechnology in enhancing biohydrogen production is examined. Under anaerobic conditions, hydrogen is produced during the conversion of organic substrate into organic acids using fermentative bacteria and during the conversion of organic acids into hydrogen and carbon dioxide using photofermentative bacteria. Different factors that enhance the biohydrogen production of these organisms, either combined or sequentially, using dark and photofermentation processes, are examined, and the effect of each factor on biohydrogen production efficiency is reported. A comparison of hydrogen production efficiency between dark fermentation, photofermentation, and two-stage processes is also presented.

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Section: Diversity Of Biohydrogen-producing Bacteriamentioning

confidence: 99%

Biohydrogen—A Green Fuel for Sustainable Energy Solutions

Kanwal

Torriero

2022

Energies

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“…Fat is about 0.4 -0.5%, while salts vary from 1 to 3% (2,15,26) [10]. Milk handing out effluents have a bigger temperature, big variations in pH, TSS, BOD, COD, TN, TP and FOG, Table 1, it can be seen the characteristics of dairy wastewater which suggested preparing the synthetic samples in this article [36][37][38][39][40].…”

Section: Characteristics Of Dairy Wastewatermentioning

confidence: 99%

Mercury Removal From Dairy Wastewater by Using Membrane Distillation

Hasan

2022

jeasd

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Milk is one of the essential and necessary nutrients and maybe a basic substance in some places and all stages of human life. Milk is rich in many important elements for life and durability. Toxins and heavy elements may enter the milk and then into the human body due to pollution, and mercury is one of these pollutants. This product, despite being important, the production process is accompanied by a lot of liquid waste, which may lead to significant environmental damage. All small tests and misilianiuse works as well as the test of characteristics have been achieved according to American Public Health Association (APHA), American Water Works Association (AWWA), and Water Environment Federation (WEF). Mercury concentration has been achieved according to HACH procedure. In this topic, the membrane distillation process has been used to remove mercury, and the results were the ability of the membrane distillation mechanism to remove mercury 89.044% at the start of the operation, which would decrease due to obstruction. The temperature affects work efficiency and removal by MD, but to some extent, when removal reaches the maximum temperature of 15 ° C. The study came out with a set of recommendations, including a broader study on the possibility of cleaning the membrane used in this mechanism when a blockage occurred without stopping the work of this mechanism. Emphasis should be on what was found more than what was done.

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“…are believed to be the most efficient hydrogen producer, some studies outline that Enterobacter sp. can also yield a high hydrogen production [58][59][60], on some occasions even higher than Clostridium sp. [61].…”

Section: Effect Of the Inoculum Type On The Metabolic Profilesmentioning

confidence: 99%

Dark Fermentation Process Response to the Use of Undiluted Tequila Vinasse without Nutrient Supplementation

et al. 2021

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The technical feasibility of valorizing tequila vinasse (TV), a wastewater with high pollution potential, through the production of biogenic hydrogen via dark fermentation, has long been proven in diverse lab-scale reactors that were operated either in batch or continuous mode. However, such systems have mainly been tested with diluted streams and nutrient supplementation, hindering the techno-economic attractiveness of the TV-to-hydrogen concept at large scale. In this study, the feasibility of producing hydrogen from high-strength undiluted TV with no added extra nutrients was evaluated under batch mesophilic conditions. Additionally, the use of two different acidogenic inocula obtained either by heat or heat-aeration pretreatment was investigated to get a greater understanding of the effect of inoculum type on the process. The results obtained showed that the TV utilized herein contained macro- and micro-nutrients high enough to support the hydrogenogenic activity of both cultures, entailing average hydrogen yields of 2.4–2.6 NL H2/L vinasse and maximum hydrogen production rates of 1.4–1.9 NL H2/L-d. Interestingly, the consumption of lactate and acetate with the concomitant production of butyrate was observed as the main hydrogen-producing route regardless of the inoculum, pointing out the relevance of the lactate-driven dark fermentative process. Clostridium beijerinckii was ascertained as key bacteria, but only in association with microorganisms belonging to the genera Enterobacter and Klebsiella, as revealed by phylogenetic analyses.

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Optimization and modelling of dark fermentative hydrogen production from cheese whey by Enterobacter aerogenes 2822

Cited by 52 publications

References 96 publications

Biohydrogen—A Green Fuel for Sustainable Energy Solutions

Biohydrogen—A Green Fuel for Sustainable Energy Solutions

Mercury Removal From Dairy Wastewater by Using Membrane Distillation

Dark Fermentation Process Response to the Use of Undiluted Tequila Vinasse without Nutrient Supplementation

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