@article { author = {}, title = {Editorial Board}, journal = {Biofuel Research Journal}, volume = {6}, number = {3}, pages = {-}, year = {2019}, publisher = {Alpha Creation Enterprise}, issn = {2292-8782}, eissn = {2292-8782}, doi = {10.18331/BRJ2019.6.3.1}, abstract = {}, keywords = {}, url = {https://www.biofueljournal.com/article_92198.html}, eprint = {https://www.biofueljournal.com/article_92198_e34fd80073a8412b0b875abceace5f99.pdf} } @article { author = {Kazemi Shariat Panahi, Hamed and Dehhaghi, Mona and Kinder, James E. and Ezeji, Thaddeus Chukwuemeka}, title = {A review on green liquid fuels for the transportation sector: a prospect of microbial solutions to climate change}, journal = {Biofuel Research Journal}, volume = {6}, number = {3}, pages = {995-1024}, year = {2019}, publisher = {Alpha Creation Enterprise}, issn = {2292-8782}, eissn = {2292-8782}, doi = {10.18331/BRJ2019.6.3.2}, abstract = {Environmental deterioration, global climate change, and consequent increases in pollution-related health problems among populations have been attributed to growing consumption of fossil fuels in particular by the transportation sector. Hence, replacing these energy carriers, also known as major contributors of greenhouse gas emissions, with biofuels have been regarded as a solution to mitigate the above-mentioned challenges. On the other hand, efforts have been put into limiting the utilization of edible feedstocks for biofuels production, i.e., first generation biofuels, by promoting higher generations of these eco-friendly alternatives. In light of that, the present review is aimed at comprehensively assessing the role and importance of microorganisms such as bacteria and yeasts as catalysts for sustainable production of liquid biofuels including bioethanol, biomethanol, biobutanol, bio-ammonia, biokerosene, and bioglycerol. Various aspects of these biofuels, i.e., background, chemical synthesis, microbial production (including exploitation of wild and metabolically-engineered species), and product recovery as well as the derivatives produced from these biofuels which are used as fuel additives are thoroughly covered and critically discussed. Furthermore, the industrial features of these green liquid fuels including the industrial practices reported in the literature and the challenges faced as well as possible approaches to enhance these practices are presented.}, keywords = {Biofuel,Microbial metabolite,Bioethanol,Biobutanol,Bio-jet fuel,Sustainable energy,Fuel additive}, url = {https://www.biofueljournal.com/article_92199.html}, eprint = {https://www.biofueljournal.com/article_92199_d80855f1b1d8a37e94a9376a479f4d55.pdf} } @article { author = {Sharma, Rohit Kumar and O'Neill, Crystal A. and Ramos, Hector A.R. and Thapa, Bibek and Barcelo-Bovea, Vanessa C. and Gaur, Kavita and Griebenow, Kai}, title = {Candida rugosa lipase nanoparticles as robust catalyst for biodiesel production in organic solvents}, journal = {Biofuel Research Journal}, volume = {6}, number = {3}, pages = {1025-1038}, year = {2019}, publisher = {Alpha Creation Enterprise}, issn = {2292-8782}, eissn = {2292-8782}, doi = {10.18331/BRJ2019.6.3.3}, abstract = {Inexpensive but resourceful sources of lipids, for example, used cooking oil (UCO) and brown grease (BG), which often contain large amounts of free fatty acids (FFA), are difficult to convert into biodiesel economically and in good yield. Candida rugosa lipase nanoparticles (cNP) were formed first and subsequently cross-linked nanoparticles (CLNP) were obtained by crosslinking of them. Alternatively, cNP were conjugated to magnetic nanoparticles (mNP) to achieve a cNP-mNP conjugate. All three formulations were employed in three different organic solvents (n-heptane, 1,4-dioxane, and t-butanol) to produce biodiesel using BG and UCO in the transesterification reaction with ethanol and methanol. The radii of nanoparticles (NP) were 5.5, 75, 100, 85 nm for mNP, cNP, CLNP, and cNP-mNP, respectively, as measured by scanning/transmission electron microscopy and dynamic light scattering. The catalytic efficiency (Kcat/KM) of cNP, CLNP, and cNP-mNP was increased ca. -25, -68, -176 folds in n-heptane and -35, -131, -262 folds in 1,4-dioxane compared to the lyophilized lipase in the model transesterification reaction of p-nitrophenyl palmitate (PNPP) with ethanol. In biodiesel formation, the best performance with 100% conversion of BG was achieved under optimum conditions with cNP-mNP, ethanol at a 1:3 molar ratio of lipid-to-alcohol, NP at a 1:0.1 weight ratio of lipid-to-enzyme, and water at a 1:0.04 weight ratio of enzyme-to-water at 30 oC for 35 h. The operational stability of the CLNP and cNP-mNP was sustained even after five consequent biodiesel batch conversions while 50% and 82% residual activity (storage stability) were retained after 40 d.}, keywords = {Biodiesel,Brown grease,Candida rugosa lipase,Crosslinked lipase nanoparticles,Conjugated lipase nanoparticles,Used cooking oil}, url = {https://www.biofueljournal.com/article_92200.html}, eprint = {https://www.biofueljournal.com/article_92200_1c210ea63153989a0b765222110a441e.pdf} } @article { author = {Ferreira, Samuel Fontenelle and Buller, Luz Selene and Berni, Mauro Donizeti and Bajay, Sergio Valdir and Forster-Carneiro, Tânia}, title = {An integrated approach to explore UASB reactors for energy recycling in pulp and paper industry: a case study in Brazil}, journal = {Biofuel Research Journal}, volume = {6}, number = {3}, pages = {1039-1045}, year = {2019}, publisher = {Alpha Creation Enterprise}, issn = {2292-8782}, eissn = {2292-8782}, doi = {10.18331/BRJ2019.6.3.4}, abstract = {Brazil is currently focused on its energy matrix transition in favor of increasing of the share of renewable energy carriers for both enhanced energy security and mitigation of greenhouse gas emissions. In this context, the country`s pulp and paper industry whose different wastes teams are not generally exploited, could play a critical role. Accordingly, the main objective of this work is to develop a conceptual ‘systemic’ biorefinery framework integrating the treatment of pulp and paper mill wastewater using upflow anaerobic sludge blanket (UASB) reactor with energy recovery through biogas production and its conversion into heat and power in stationary engines and boilers, respectively. Based on the results obtained through the present case study, it was revealed that the adoption of UASB reactors by the paper mill industry could properly addresses the environmental concerns faced while could contribute to the national agenda favoring an increasing share of renewable energies in the country`s energy matrix. The financial analysis showed that the investment required for the implementation of UASB reactors within a biorefinery platform would be minor vs. the investment in the whole mill and would be returned in 6.4 yr with a high return on investment even when operated at half of operational capacity. Moreover, through the developed UASB reactor-based biorefinery, the Brazilian pulp and paper industry as a whole could avoid 1.06 ×105 CO2eq tons, effectively contributing to the decarbonization of the country`s economy.}, keywords = {Pulp and paper mill,Wastewater Treatment,UASB Reactor,Biogas,GHG mitigation,Financial and economic analysis}, url = {https://www.biofueljournal.com/article_92201.html}, eprint = {https://www.biofueljournal.com/article_92201_b8f13325750c8ce0a9c29432f708749e.pdf} } @article { author = {Pascualone, María J. and Gómez Costa, Marcos B. and Dalmasso, Pablo R.}, title = {Fermentative biohydrogen production from a novel combination of vermicompost as inoculum and mild heat-pretreated fruit and vegetable waste}, journal = {Biofuel Research Journal}, volume = {6}, number = {3}, pages = {1046-1053}, year = {2019}, publisher = {Alpha Creation Enterprise}, issn = {2292-8782}, eissn = {2292-8782}, doi = {10.18331/BRJ2019.6.3.5}, abstract = {This study reports for the first time on biohydrogen production by dark fermentation using a novel combination of mild heat-pretreated fruit and vegetable waste (FVW) as raw material and vermicompost as an economical source of hydrogen-producing bacteria. A suspension rich in reducing sugars obtained from FVW was used at different initial concentrations (5 to 25 g reducing sugars/L) during the bioprocess conducted in batch reactors at mesophilic temperature of 35 °C. The use of a mild heat-pretreated substrate and the consequent elimination of the natural microbiota present in the FVW led to higher hydrogen production than the control. Clostridium species, hydrogen-producing bacteria via butyric acid fermentation pathway, were the dominant microorganisms in the bioprocess. Hydrogen production, volumetric hydrogen production rate, and pretreated substrate degradation efficiency (63.0 mL/g VS, 372.6 mL/L/d, and 50% BOD5, respectively) obtained in the experiments performed with the highest substrate concentration demonstrated that the developed bioprocess was promising simultaneously leading to high hydrogen contents in biogas and high substrate removal efficiencies.}, keywords = {Biohydrogen,Dark fermentation,Fruit and vegetable waste,Vermicompost,Mild heat-pretreated substrate}, url = {https://www.biofueljournal.com/article_92202.html}, eprint = {https://www.biofueljournal.com/article_92202_9343805dc82157d511f7167ea43e5121.pdf} }