Waste-to-energy nexus for circular economy and environmental protection: Recent trends in hydrogen energy

Sharma, Surbhi; Basu, Soumen; Shetti, Nagaraj P.; Aminabhavi, Tejraj M.

doi:10.1016/j.scitotenv.2020.136633

Cited by 291 publications

(75 citation statements)

References 104 publications

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“…Efforts have been contributed to improving waste management, resource extraction and energy recovery from waste ( Moustakas et al., 2020 ). Sharma et al. (2020) investigated the potential of producing bio-hydrogen using waste materials such as industrial wastewater, sludge, farming waste and food waste, etc.…”

Section: Recent Development Trends and Toolsmentioning

confidence: 99%

Process assessment, integration and optimisation: The path towards cleaner production

Varbanov

Jia

Lim

2021

Journal of Cleaner Production

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This contribution starts from the broad perspective of the global material cycles, analysing the main resource and pollution issues world-wide from the viewpoint of the disturbances to these cycles caused by human activities. The issues are analysed in the light of the currently developing COVID-19 pandemic with the resulting behavioural and business pattern changes. It has been revealed in the analysis of previous reviews that there is a need for a more comprehensive analysis of the resource and environmental impact contributions by industrial and urban processes, as well as product supply chains. The review discusses the recent key developments in the areas of Process Integration and Optimisation, the assessment and reduction of process environmental impacts, waste management and integration, green technologies. That is accompanied by a review of the papers in the current Virtual Special Issue of the Journal of Cleaner Production which is dedicated to the extended articles developed on the basis of the papers presented at the 22nd Conference on Process Integration for Energy Saving and Pollution Reduction. The follow-up analysis reveals significant advances in the efficiency and emission cleaning effects of key processes, as well as water/wastewater management and energy storage. The further analysis of the developments identifies several key areas for further research and development – including increases of the safety and robustness of supply networks for products and services, increase of the resources use efficiency of core production and resource conversion processes, as well as the emphasis on improved product and process design for minimising product wastage.

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Section: Recent Development Trends and Toolsmentioning

confidence: 99%

Process assessment, integration and optimisation: The path towards cleaner production

Varbanov

Jia

Lim

2021

Journal of Cleaner Production

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“…The global energy demand is expected to double from 15 TW (2011) to 30 TW (2050) [1][2][3]. Eighty-one percent of our energy demand is supplied by fossil fuel.…”

Section: Introductionmentioning

confidence: 99%

Investigation of non-Pb all-perovskite 4-T mechanically stacked and 2-T monolithic tandem solar devices utilizing SCAPS simulation

et al. 2021

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SCAPS simulation was utilized to complement previously published perovskite-on-Si tandem solar devices and explore herein viable all-perovskite 4-T mechanically stacked and 2-T monolithic non-Pb tandem structures. CsSn0.5Ge0.5I3 (1.5 eV) was used as top cell wide bandgap absorber, while CsSnI3 (1.3 eV) was chosen as bottom cell low bandgap absorber. The top cell was simulated with AM 1.5G 1 Sun spectrum, and the bottom cell was simulated with the filtered spectrum from the top cell. To form a 2-T monolithic tandem device, ITO was used as the recombination layer; the current matching condition was investigated by varying the thickness of the absorber layers. For a current-matched device with a Jsc of 21.2 mA/cm2, optimized thicknesses of 450 nm and 815 nm were obtained for the top and bottom absorber layers, respectively. At these thicknesses, the PCEs of the top and bottom cells were 14.08% and 9.25%, respectively, and 18.32% for the final tandem configuration. A much simpler fabricated and simulated 4-T mechanically stacked tandem device, on the other hand, showcased top and bottom cell PCEs of 15.83% and 9.15%, at absorber layer thicknesses of 1300 nm and 900 nm, respectively, and a final overall tandem device PCE of 19.86%.

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“…Energy shortage and environmental degradation have become major obstacles to economic development and social progress [1,2]. Hydrogen is a type of green energy known for its high energy storage capacity, clean and renewable production, and its utility as an alternative to traditional fossil fuels [3].…”

Section: Introductionmentioning

confidence: 99%

Supplementation of green-synthesized nickel oxide nanoparticles enhances biohydrogen production of Klebsilla sp. using lignocellulosic hydrolysate and elucidation of the regulatory mechanism

Zhang

et al. 2021

Preprint

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Background In recent years, adding nanoparticles to fermentative hydrogen production system has become an effective way to increase the biohydrogen yield, however, the application of green synthesized nanoparticles to hydrogen production system is rarely studied, even to the interpretation of the regulatory mechanism, there are few reports on the regulation of hydrogen production pathway and related gene expression by addition of nanoparticles. Thus, we herein reported the green synthesis of nickel oxide nanoparticles (NiO-NPs) from Eichhornia crassipes (Ec) extract for the first time, and evaluated the regulatory effect of these NPs on fermentative hydrogen production. Results Characterization of the Ec-NiO-NPs revealed their spherical shape, small diameter (9.1 ± 2.6 nm) and high purity. The maximum cumulative hydrogen production and hydrogen yield Y(H2/S) reached 4842.19 ± 23.43 mL/L and 101.45 ± 3.32 mL/gsubstrate, respectively, in the presence of 20 mg/L Ec-NiO-NP, which were 47.29% and 37.78% higher than the control without NPs addition. Evaluation of glucose and xylose utilization efficiency as well as key node metabolites further established the potential of Ec-NiO-NP to improve the reducing sugar utilization and metabolic flux distribution in hydrogen synthesis pathway. Furthermore, addition of 20 mg/L Ec-NiO-NP resulted in enhanced hydrogenase activity with a maximum increase of 623% comparing to the control, and led to changes in the gene expression of both hydrogenase and formate-hydrogen lyase, which play important roles in promoting hydrogen production at different stages of fermentation. Conclusions The results prove that supplementation with green-synthesized Ec-NiO-NP effectively improves fermentative hydrogen production and regulates key node metabolites alteration and functional gene expression. This study provides a cheap and eco-friendly method to enhance fermentative hydrogen production and new insights to reveal the regulatory mechanism underlying NP mediated increases in biohydrogen synthesis.

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Waste-to-energy nexus for circular economy and environmental protection: Recent trends in hydrogen energy

Cited by 291 publications

References 104 publications

Process assessment, integration and optimisation: The path towards cleaner production

Process assessment, integration and optimisation: The path towards cleaner production

Investigation of non-Pb all-perovskite 4-T mechanically stacked and 2-T monolithic tandem solar devices utilizing SCAPS simulation

Supplementation of green-synthesized nickel oxide nanoparticles enhances biohydrogen production of Klebsilla sp. using lignocellulosic hydrolysate and elucidation of the regulatory mechanism

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