Impacts of iron oxide and titanium dioxide nanoparticles on biogas production: Hydrogen sulfide mitigation, process stability, and prospective challenges

Farghali, Mohamed; Andriamanohiarisoamanana, Fetra J.; Ahmed, Moustafa M.; Kotb, Saber; Yamashiro, Takaki; Iwasaki, Masahiro; Umetsu, Kazutaka

doi:10.1016/j.jenvman.2019.03.089

Cited by 84 publications

(41 citation statements)

References 48 publications

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“…Not only was the biogas yield enhanced, but the presence of these particles also favored a lower production of H 2 S, which is of great relevance regarding subsequent biogas up-grading operations. Similarly, Farghali et al [134] studied the addition of iron oxide (Fe 2 O 3 ) and titanium dioxide (TiO 2 ) nanoparticles, reporting a twofold increase in biogas yields and a decrease in H 2 S production. The addition of magnetite NPs was studied by Ali et al [135] and Zhong et al [136], with the latter indicating that the presence of these particles was probably responsible for accelerating the transfer of electrons from acid oxidizers to syntrophic methanogenesis, stimulating acid oxidizers to degrade acetate into H 2 /CO 2 , and finally to facilitate methane production.…”

Section: The Effect Of Adsorbents and Materials In Accelerating Anaerobic Degradationmentioning

confidence: 99%

High-Solid Anaerobic Digestion: Reviewing Strategies for Increasing Reactor Performance

et al. 2021

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High-solid and solid-state anaerobic digestion are technologies capable of achieving high reactor productivity. The high organic load admissible for this type of configuration makes these technologies an ideal ally in the conversion of waste into bioenergy. However, there are still several factors associated with these technologies that result in low performance. The economic model based on a linear approach is unsustainable, and changes leading to the development of a low-carbon model with a high degree of circularity are necessary. Digestion technology may represent a key driver leading these changes but it is undeniable that the profitability of these plants needs to be increased. In the present review, the digestion process under high-solid-content configurations is analyzed and the different strategies for increasing reactor productivity that have been studied in recent years are described. Percolating reactor configurations and the use of low-cost adsorbents, nanoparticles and micro-aeration seem the most suitable approaches to increase volumetric production and reduce initial capital investment costs.

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Section: The Effect Of Adsorbents and Materials In Accelerating Anaerobic Degradationmentioning

confidence: 99%

High-Solid Anaerobic Digestion: Reviewing Strategies for Increasing Reactor Performance

et al. 2021

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“…Meanwhile, a sharp reduction of H 2 S (53.0-57.9%) was also reported due to the formation of precipitation by IONPs such as ferrous sulfide (Fe S). 213 The effect of IONPs on biomethane at several concentrations of iron oxide (50, 75, 100, and 125 mg L −1 ) was studied. Maximum biogas production was observed with 75 mg L −1 IONPs, which was 53.3% higher.…”

Section: Additives Are Accelerator Of Admentioning

confidence: 99%

Facilitated lignocellulosic biomass digestibility in anaerobic digestion for biomethane production: microbial communities' structure and interactions

Faisal

Thakur

Jalalah

et al. 2021

J of Chemical Tech & Biotech

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Lignocellulosic biomass is a highly available and suitable candidate for biogas/biomethane production. However, high concentration of recalcitrant lignin is the major obstacle in successful anaerobic digestion (AD). The main aim of this review is to highlight the applications and challenges of lignocellulosic biomass in AD from the recent reports. Potential approaches to improve instabilities in mesophilic AD process (such as microbial communities' development, co-digestion, biofilm carrier's addition, and essential nutrients supplement) were also reported. This review goes one more step deeper to discuss the key microbes involved in lignocellulosic biomass degradation. Biofilm carriers provide attached growth systems for microbes in AD and acts as redox mediators to accelerate the biotransformation of recalcitrant pollutants. Addition of nanoparticles (NPs) stimulate Firmicutes, Bacteroidetes, Methanosaeta, Methanobacterium, and Methanosarcina population which further improve biomethanation. The comprehensive study of these proposed strategies and microbial stimulation through additives would make the lignocellulosic biomethanation more feasible.

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“…They observed that the application of NPs doubled the volume of methane relative to the control sample. Farghali et al examined the effect of TiO 2 NPs on the efficiency of AD of bovine slurry and recorded, in comparison with the control, 1.5‐fold higher biogas production efficiency after TiO 2 had been added to bioreactors . Khalid et al, when using Fe 3 O 4 NPs in an AD process, recorded an increase by 33% in the efficiency of biogas production from rice straw .…”

Section: Feedstocks Technologies and Factors Design To Intensify Bimentioning

confidence: 99%

“…Methanogenic microorganisms are highly sensitive to changes in pH in bioreactors. Excessively low pH can cause inhibition of AD, while very high pH can lead to the production of free ammonia, which is toxic to methanogenic microorganisms . The microorganisms participating in the process of methane fermentation, that is, hydrolytic, acidogenic, and methagenic microorganisms, have optimal pH ranges in which the maximum reaction efficiency is obtained.…”

Section: Feedstocks Technologies and Factors Design To Intensify Bimentioning

confidence: 99%

“…The pH value of the suspension also depends on a stage of the process. At the beginning of the process, during the stage of production of acids and release of large amounts of carbon dioxide, pH is around 6 . In the subsequent weeks of the AD process, pH slowly increases, methanogenic microorganisms are active and methane is produced.…”

Section: Feedstocks Technologies and Factors Design To Intensify Bimentioning

confidence: 99%

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Intensification of biogas production using various technologies: A review

et al. 2020

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Summary Anaerobic digestion (AD) is an organic matter conversion technology which offers a wide range of options for production of biogas from organic biomass, providing an excellent opportunity to convert abundant bioresources into safe, eco‐friendly, renewable energy. Important factors in the process of AD are the biodiversity of microorganisms, chemical load of oxygen demand, and content of water and total solids. A challenge for the future is to find technologies that will maximally enhance biogas production and to find pathways for biogas to supersede well‐established technologies and practices in the contemporary heavily fossil fuel‐based energy system. Current studies on technologies of biogas production indicate a number of possibilities of using appropriate biological and physicochemical additives, like added enzymes or fruit pomace, as well as immobilizing microorganisms on biofilters. Anaerobic biorefinery is an emerging concept that generates not only bioenergy but also high‐value biochemical products from the same feedstock. This study is a review of articles describing the intensification of biogas production by using various technologies.

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Impacts of iron oxide and titanium dioxide nanoparticles on biogas production: Hydrogen sulfide mitigation, process stability, and prospective challenges

Cited by 84 publications

References 48 publications

High-Solid Anaerobic Digestion: Reviewing Strategies for Increasing Reactor Performance

High-Solid Anaerobic Digestion: Reviewing Strategies for Increasing Reactor Performance

Facilitated lignocellulosic biomass digestibility in anaerobic digestion for biomethane production: microbial communities' structure and interactions

Intensification of biogas production using various technologies: A review

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