Orta, Sharon Velasquez - Newcastle University - School of Chemical Engineering and Advanced Materials

研究领域

Bio-electrochemistry Technology: Microbial Fuel Cells (MFCs) are a type of technology that enables wastewater treatment and electricity generation. MFCs utilise various organic electron donors under anaerobic conditions and directly transform chemical energy into electrical energy via a series of electrochemical reactions. I have studied the effect of different organic wastewaters, novel mediator compounds and organic loading rates on bioelectricity production, organic matter removal and microbial diversity. I am also interested into using Microbial Electrosynthesis for carbon dioxide transformation to longer chain organic molecules. In this area our group has conducted economic and sustainability evaluations, recently proving the feasibility of using bioelectrochemical reactors on fermentation tanks to convert CO2 waste emissions. To know more about this research visit: http://www.staff.ncl.ac.uk/sharon.velasquez-orta/ Bio-fuel Production: Biofuel can be produced from wastewater sludge and microalgae using chemical (in situ transesterification), thermal (catalytic cracking) or biological processes. These two processes offer several advantages such as the elimination of the oil extraction step, potential improvement on biofuel yield, and reduction in the transportation of intermediate products. In situ transesterification is utilised for biodiesel production while catalytic cracking can produce several types of biofuels such as methane, biodiesel and jet fuel. To know more about this field of research visit: http://pig.ncl.ac.uk Sustainable Engineering Systems: Collaboration with SECURE (Self Conserving Urban Environments): Life cycle analysis to determine the energy use and carbon emissions produced during the transportation, treatment and final disposal of solid wastes, wastewater produced in the North East of England. To know more about this research visit: https://www.secure-project.org/

近期论文

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Christodoulou X, Velasquez-Orta SB. Microbial electrosynthesis and anaerobic fermentation: An economic evaluation for acetic acid production from CO2 and CO. Environmental Science and Technology 2016, 50(20), 11234–11242. Valeriano González MT, Monje-Ramírez I, Orta Ledesma MT, Gracia-Fadrique J, Velásquez-Orta SB. Harvesting microalgae using ozoflotation releases surfactant proteins, facilitates biomass recovery and lipid extraction. Biomass and Bioenergy 2016, 95, 109-115. Salam K, Velasquez-Orta SB, Harvey AP. Kinetics of fast alkali reactive extraction/in situ transesterification of Chlorella vulgaris that identifies process conditions for a significant enhanced rate and water tolerance. Fuel Processing Technology 2016, 144, 212–219. Varia JC, Zegeye A, Velasquez-Orta S, Bull S. Process analysis of AuCl4- sorption leading to gold nanoparticle synthesis by Shewanella putrefaciens. Chemical Engineering Journal 2016, 288, 482-488. Salam K, Velasquez-Orta SB, Harvey AP. Surfactant-assisted direct biodiesel production from wet Nannochloropsis occulata by in situ transesterification/reactive extraction. Biofuel Research Journal 2016, 3(1), 366-371. Salam KA, Velasquez-Orta SB, Harvey AP. In Situ Transesterification of Wet Marine and Fresh Water Microalgae for Biodiesel Production and Its Effect on the Algal Residue. Journal of Sustainable Bioenergy Systems 2016, 6(2), 17-30. Velasquez-Orta SB. Low cost microbial fuel cell biosensors. In: UN International Zaragoza Conference: Tools for Water, Sanitation and Hygiene implementation. Water and Sustainable Development from Vision to Action. 2015, Zaragoza, Spain: United Nations. Velasquez-Orta SB, Lee JGM, Harvey AP. Catalytic cracking using ZSM-5 or Zeolite-Y and pyrolysis of Chlorella vulgaris. In: 5th International Conference on Algal Biomass, Biofuels and Bioproducts. 2015, San Diego, USA. Velasquez-Orta SB, Garcia-Estrada R, Monje-Ramirez I, Harvey A, Orta Ledesma MT. Microalgae harvesting using ozoflotation: Effect on lipid and FAME recoveries. Biomass and Bioenergy 2014, 70, 356-363. Oladapo K, Velasquez Orta SB, Monje-Ramirez I, Yá?ez Noguez I, Harvey AP, Orta Ledesma MT. Biodiesel production from indigenous microalgae grown in wastewater. Bioresource Technology 2014, 154, 297-304. Varia JC, Silva Martinez S, Velasquez-Orta S, Bull S. Microbiological influence of metal ion electrodeposition: Studies using graphite electrodes, [AuCl4]? and Shewanella putrefaciens. Electrochimica Acta 2014, 115, 344-351. Velasquez-Orta SB. Alternatives for energy production in aerobic wastewater treatment facilities. Water Science and Technology 2013, 67(12), 2856-2862. Varia J, Silva Martinez S, Velasquez Orta SB, Bull S, Roy S. Bioelectrochemical metal remediation and recovery of Au3+, Co2+ and Fe3+ metal ions. Electrochimica Acta 2013, 95, 125-131. Velasquez-Orta SB, Lee JGM, Harvey A. Evaluation of FAME production from wet marine and freshwater microalgae by in situ transesterification. Biochemical Engineering Journal 2013, 76, 83-89. Velasquez Orta SB, Lee JGM, Harvey A. Alkaline in situ transesterification of Chlorella vulgaris. Fuel 2012, 94, 544-550. Velasquez-Orta SB, Curtis TP, Logan BE. Energy From Algae Using Microbial Fuel Cells. Biotechnology and Bioengineering 2009, 103(6), 1068-1076. Velasquez-Orta SB, Head IM, Curtis TP, Scott K, Lloyd JR, von Canstein H. The effect of flavin electron shuttles in microbial fuel cells current production. Applied Microbiology and Biotechnology 2010, 85(5), 1373-1381. Velasquez Orta SB, Head IM, Curtis TP, Scott K. Factors affecting current production in microbial fuel cells using different industrial wastewaters. Bioresource Technology 2011, 102(8), 5105-5112. Velasquez-Orta SB, Yu E, Katuri KP, Head IM, Curtis TP, Scott K. Evaluation of hydrolysis and fermentation rates in microbial fuel cells. Applied Microbiology and Biotechnology 2011, 90(2), 789-798. Di Lorenzo M, Curtis T, Head IM, Velasquez-Orta SB, Scott K. A single chamber packed bed microbial fuel cell biosensor for measuring organic content of wastewater. Water Science and Technology 2009, 60(11), 2879-2887.