Search results: 134,153 results (approx.)

1. Effects of initial pH on two-stage biogas production and hydrolysis in a co-digestion process of food waste and waste activated sludge.

Batch tests were performed to investigate the effects of initial pH on the two-stage hydrogen and methane production process by co-digestion of food waste and waste activated sludge. Results show that the two-stage process had good pH adaptive capacity. Hydrogen production was similar at initial pH ...

Author(s) : Liu XinYuan; Li RuYing; Ji Min; Wu Nan; Yang Fan

Publisher : Mary Ann Liebert, Inc., New Rochelle, USA

Journal article : Environmental Engineering Science 2021 Vol.38 No.4 pp.266-276

2. How green can Amazon hydropower be? Net carbon emission from the largest hydropower plant in Amazonia.

The current resurgence of hydropower expansion toward tropical areas has been largely based on run-of-the-river (ROR) dams, which are claimed to have lower environmental impacts due to their smaller reservoirs. The Belo Monte dam was built in Eastern Amazonia and holds the largest installed...

Author(s) : Bertassoli, D. J., Jr.; Sawakuchi, H. O.; Araújo, K. R. de; Camargo, M. G. P. de; Alem, V. A. T.; Pereira, T. S.; Krusche, A. V.; Bastviken, D.; Richey, J. E.; Sawakuchi, A. O.

Publisher : American Association for the Advancement of Science, Washington, USA

Journal article : Science Advances 2021 Vol.7 No.26 ref.41

3. Nexus between natural resources and environmental degradation: analysing the role of income inequality and renewable energy.

Globally, as the environment deteriorates, use of renewable energy is increasing. The discrepancy between inequalities, sustainable sources, and natural resources, on the other hand, is enormous. As a consequence, the current research simulated the link between income inequality, renewable energy,...

Author(s) : Wang YongMing; Uddin, I.; Gong YingMei

Publisher : MDPI AG, Basel, Switzerland

Journal article : Sustainability 2021 Vol.13 No.15 ref.137

4. Food industries wastewater recycling for biodiesel production through microalgal remediation.

This article is an overview of a biosystem of food-industry wastewater (WW) treatment using microalgae towards circular bioeconomy through biosynthesis of compounds of added-value. Focusing on circular bioeconomy with concern to environmental pollution, the management of water-resource and...

Author(s) : Amit; Dahiya, D.; Ghosh, U. K.; Nigam, P. S.; Jaiswal, A. K.

Publisher : MDPI AG, Basel, Switzerland

Journal article : Sustainability 2021 Vol.13 No.15 ref.108

5. Solar photovoltaic architecture and agronomic management in agrivoltaic system: a review.

Agrivoltaic systems (AVS) offer a symbiotic strategy for co-location sustainable renewable energy and agricultural production. This is particularly important in densely populated developing and developed countries, where renewable energy development is becoming more important; however, profitable...

Author(s) : Zainol Abidin, M. A.; Mahyuddin, M. N.; Mohd Zainuri, M. A. A.

Publisher : MDPI AG, Basel, Switzerland

Journal article : Sustainability 2021 Vol.13 No.14 ref.143

6. Comparison of synthetic and low-cost natural zeolite for bio-oil focused pyrolysis of raw and pretreated biomass.

Acid-pretreatment of rice straw (RS) and its subsequent pyrolysis with and without natural zeolite (NZ) and HZSM-5 catalysts were investigated and compared comprehensively. Acid-washing eluted 96% K, 74.73% Ca, 94.78% Mg and 98.33% Na metals from RS besides improving its higher heating value (HHV)...

Author(s) : Khan, S. R.; Muhammad Zeeshan; Absar Ahmed; Sara Saeed

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Journal of Cleaner Production 2021 Vol.313

7. Renewable energy in agriculture: farmers willingness-to-pay for a photovoltaic electric farm tractor.

The European Union has fixed the 2020 renewable energy targets on 20% of energy obtained by renewable energy, and it posed limitation to the biofuel production by agriculture. Photovoltaic electricity may represent a clean method for generating electricity for agriculture. This paper focuses on a...

Author(s) : Lombardi, G. V.; Berni, R.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Journal of Cleaner Production 2021 Vol.313

8. Spatial dynamics of firewood and charcoal production in Brazil.

Firewood and charcoal are widely used as solid fuels in thermal, mechanical, and electrical energy generation processes in Brazil. Their production comes from silviculture or extractivism. The objective of the present study is to verify whether the expansion of forestry crops, mainly of eucalyptus, ...

Author(s) : Bichel, A.; Telles, T. S.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Journal of Cleaner Production 2021 Vol.313

9. Multi-objective optimization to support the design of a sustainable supply chain for the generation of biofuels from forest waste.

The production and supply chain management of biofuels from organic waste as raw material has been identified as a promising strategy in the field of renewable energies and circular economy initiatives. This industry involves complex tasks such as strategic land use, feedstock purchasing,...

Author(s) : Gutierrez-Franco, E.; Polo, A.; Clavijo-Buritica, N.; Rabelo, L.

Publisher : MDPI AG, Basel, Switzerland

Journal article : Sustainability 2021 Vol.13 No.14 ref.56

10. Process water recirculation during hydrothermal carbonization of waste biomass: current knowledge and challenges.

Hydrothermal carbonization (HTC) is considered as an efficient and constantly expanding eco-friendly methodology for thermochemical processing of high moisture waste biomass into solid biofuels and valuable carbonaceous materials. However, during HTC, a considerable amount of organics, initially...

Author(s) : Picone, A.; Volpe, M.; Messineo, A.

Publisher : MDPI AG, Basel, Switzerland

Journal article : Energies 2021 Vol.14 No.10 ref.100

11. Decentral energy generation potential of anaerobic digestion of black water and kitchen refuse for eco-district planning.

Biogas technology is an important alternative energy source worldwide. Blackwater and kitchen refuse represent ideal waste streams for bioenergy recovery through anaerobic co-digestion. Modeling of the biokinetics of anaerobic digestion on several aspects, such as microbial activity, substrate...

Author(s) : Mohammadi, S.; Álvarez Uribarri, P. M. de; Eicker, U.

Publisher : MDPI AG, Basel, Switzerland

Journal article : Energies 2021 Vol.14 No.10 ref.34

12. Life cycle assessment of bioethanol production: a review of feedstock, technology and methodology.

So far, a lot of efforts have been put in life cycle assessments (LCA) of bioethanol production. There are many works that have assessed bioethanol production in different points of view to illustrate the environmental impacts. This study reviewed former LCA studies on bioethanol produced from...

Author(s) : Angili, T. S.; Grzesik, K.; Rödl, A.; Kaltschmitt, M.

Publisher : MDPI AG, Basel, Switzerland

Journal article : Energies 2021 Vol.14 No.10 ref.65

13. A system dynamics approach to comparative analysis of biomass supply chain coordination strategies.

Biomass is an abundant energy source, particularly in Canada, as an alternative or primary source for electricity generation. However, low economy of scale could cause a loss of efficiency for bioenergy adoption in small remote communities. In this sense, coordination among the players could...

Author(s) : Khoddami, S.; Mafakheri, F.; Zeng Yong

Publisher : MDPI AG, Basel, Switzerland

Journal article : Energies 2021 Vol.14 No.10 ref.44

14. Evaluating the influence of cetane improver additives on the outcomes of a diesel engine characteristics fueled with peppermint oil diesel blend.

This paper aims to evaluate the impact of cetane improvers on the combustion, performance and emission characteristics of a compression ignition engine fueled with a 20% peppermint bio-oil/diesel blend (P20). It is hypothesized that the low viscosity and boiling point of peppermint oil could...

Author(s) : Purushothaman Paneerselvam; Gnanamoorthi Venkadesan; Panithasan, M. S.; Gurusamy Alaganathan; Wierzbicki, S.; Mikulski, M.

Publisher : MDPI AG, Basel, Switzerland

Journal article : Energies 2021 Vol.14 No.10 ref.44

15. Torrefaction of agricultural and wood waste: comparative analysis of selected fuel characteristics.

Abundant biomass is a potential energy source. However, it possesses several challenges when considered for energy applications. Torrefaction, a thermal pretreatment process can improve the properties of biomass as energy source. This study focused on comparing effect of torrefaction operating...

Author(s) : Cahyanti, M. N.; Doddapaneni, T. R. K. C.; Madissoo, M.; Pärn, L.; Virro, I.; Kikas, T.

Publisher : MDPI AG, Basel, Switzerland

Journal article : Energies 2021 Vol.14 No.10 ref.71

16. Sustainability evaluation of non-toxic Jatropha curcas in rural marginal soil for obtaining biodiesel using life-cycle assessment.

Using information from an experimental planting of non-toxic Jatropha curcas (NTJC) with minimal water and fertilization resources on rural marginal soil the objective of this article is to determine the sustainability of this raw material for producing biodiesel and the possibilities for improving ...

Author(s) : Pérez, G.; Islas-Samperio, J. M.

Publisher : MDPI AG, Basel, Switzerland

Journal article : Energies 2021 Vol.14 No.10 ref.76

17. Biogas from anaerobic digestion as an energy vector: current upgrading development.

The present work reviews the role of biogas as advanced biofuel in the renewable energy system, summarizing the main raw materials used for biogas production and the most common technologies for biogas upgrading and delving into emerging biological methanation processes. In addition, it provides a...

Author(s) : Iglesias, R.; Muñoz, R.; Polanco, M.; Díaz, I.; Susmozas, A.; Moreno, A. D.; Guirado, M.; Carreras, N.; Ballesteros, M.

Publisher : MDPI AG, Basel, Switzerland

Journal article : Energies 2021 Vol.14 No.10 ref.156

18. Overview and main findings for the Austrian case study.

As part of a project investigating in the potential greenhouse gas mitigation effect of the increased use and production of mass timber worldwide, a comparative study was carried out to show the potential benefit of mass timber use in buildings in central Europe. After designing a mass timber...

Author(s) : Dolezal, F.; Dornigg, I.; Wurm, M.; Figl, H.

Publisher : MDPI AG, Basel, Switzerland

Journal article : Sustainability 2021 Vol.13 No.14 ref.33

19. Hydrohydroxymethylation of ethyl ricinoleate and Castor oil.

The direct functionalization of the carbon-carbon double bonds of castor oil and its derivatives is of major interest to access biosourced building blocks. In particular, polyol derivatives can be produced in this way and find application in the field of bio-based polyesters and polyurethanes. In...

Author(s) : Becquet, C.; Berche, F.; Bricout, H.; Monflier, E.; Tilloy, S.

Publisher : American Chemical Society, Washington, USA

Journal article : ACS Sustainable Chemistry & Engineering 2021 Vol.9 No.28 pp.9444-9454

20. Climate change impacts on renewable energy supply.

Renewable energy resources, which depend on climate, may be susceptible to future climate change. Here we use climate and integrated assessment models to estimate this effect on key renewables. Future potential and costs are quantified across two warming scenarios for eight technologies:...

Author(s) : Gernaat, D. E. H. J.; Boer, H. S. de; Daioglou, V.; Yalew, S. G.; Müller, C.; Vuuren, D. P. van

Publisher : Nature Publishing Group, London, UK

Journal article : Nature Climate Change 2021 Vol.11 No.2 pp.119-125 ref.52

21. Transesterification of Litsea cubeba kernel oil to biodiesel over zinc supported on zirconia heterogeneous catalysts.

An effective approach for synthesizing green and sustainable biodiesel fuel from low-value vegetable oils has been explored. Herein, a series of catalysts of zinc supported on zirconia (xZn/ZrO2) were successfully synthesized, characterized, and applied for the production of biodiesel from Litsea...

Author(s) : Li DongMing; Feng WenPing; Chen Chao; Chen ShangXing; Fan GuoRong; Liao ShengLiang; Wu GuoQiang; Wang ZongDe

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Renewable Energy 2021 Vol.177 pp.13-22

22. Near infrared technique as a tool for the rapid assessment of waste wood quality for energy applications.

Considering the focus of the current European policy in promoting the reuse of waste products and increasing the share of renewable energies, waste wood is becoming an appealing resource rather than a product to dispose of. End-life waste wood products could be used for the production of panel...

Author(s) : Mancini, M.; Rinnan, Å.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Renewable Energy 2021 Vol.177 pp.113-123 ref.37

23. Enhanced energy and resource recovery via synergistic catalytic pyrolysis of byproducts from thermal processing of wastewater solids.

Wastewater sludge drying and incineration are conventional solids handling processes that are sometimes employed in water resource reclamation facilities. However, these two processes generate byproducts, sludge drying chaff and sludge incinerator ash, which are landfilled without taking advantage...

Author(s) : Liu ZhongZhe; Hughes, M.; Tong YiRan; Zhou JiZhi; Kreutter, W.; Valtierra, D.; Singer, S.; Zitomer, D.; McNamara, P.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Renewable Energy 2021 Vol.177 pp.475-481 ref.47

24. Biomass gasification using mixtures of air, saturated steam, and oxygen in a two-stage downdraft gasifier. Assessment using a CFD modeling approach.

This work proposes and employs a mixed-complexity modeling approach to creating a 3D computational fluid dynamics (CFD) model to predict the syngas production from Miscanthus briquettes in a two-stage downdraft gasifier operating with different gasification fluids. The study was performed at steady ...

Author(s) : Maya, D. M. Y.; Lora, E. E. S.; Andrade, R. V.; Ratner, A.; Martínez Angel, J. D.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Renewable Energy 2021 Vol.177 pp.1014-1030

25. Economical evaluation of jojoba cultivation for biodiesel production in Jordan.

In this study, the economic feasibility of jojoba cultivation for biodiesel production in Jordan is analyzed. The investigations are carried out for all activities and operations from jojoba farming, through oil extraction to biodiesel production and byproduct utilization. A thousand-hectare farm,...

Author(s) : Sandouqa, A.; Al-Hamamre, Z.

Publisher : Elsevier Ltd, Oxford, UK

Journal article : Renewable Energy 2021 Vol.177 pp.1116-1132