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Cesar Torres

Assoc Professor
Faculty, TEMPE Campus, Mailcode 6106
Asst Professor
Faculty, TEMPE Campus, Mailcode 6106
Biography

Dr. César I. Torres is an Associate Professor of Chemical Engineering in the School for Engineering of, Matter, Transport and Energy at Arizona State University.  He is also graduate faculty in Environmental Engineering, Biological Design, and Sustainability.  César is a leader in microbial electrochemical cell research, focusing on microbial kinetics of anode-respiring bacteria (ARB) and extracellular electron transport to and from solid electrodes.  He has published >50 articles in peer-reviewed journals on this topic.  César combines biofilm modeling, electrochemical, microscopic, and analytical techniques, to characterize ARB kinetics and thermodynamics.

Visit  http://torres.environmentalbiotechnology.org/

Education

PhD, Environmental Engineering, Arizona State University, 2009
MSE, Environmental Engineering, Northwestern University, 2005
BS, Chemical Engineering, University of Puerto Rico-Mayaguez, 2002

Research Interests

The Torres Lab, part of the Swette Center for Environmental Biotechnology, focuses on microbiological technologies that provide energy or high value chemicals to society.  Our goal is to make use of microorganisms and their complex enzymatic machinery to carry out reactions that are difficult or impossible through any other known chemical route.  Our main research topics are microbial electrochemistry, fermentations, and photosynthetic production of biofuels.

Visit  http://torres.environmentalbiotechnology.org/

Publications

2017

  • B.G. Lusk, A. Colin, P. Parameswaran, B.E. Rittmann, C.I. Torres. Simultaneous fermentation of cellulose and current production with an enriched mixed culture of thermophilic bacteria in a microbial electrolysis cell. Microbial Biotechnology2017, in press.
  • D. Ki, S.C. Popat, B.E. Rittmann, C.I. Torres. H2O2 production in microbial electrochemical cells fed with primary sludge. Environmental Science & Technology201751, 6139-6145. 
  • M.N. Young, N. Chowdhury, E. Garver, P.J. Evans, S.C. Popat, B.E. Rittmann, C.I. Torres. Understanding the impact of operational conditions on performance of microbial peroxide producing cells. Journal of Power Sources2017356, 448-458.
  • D. Zhou, S. Dong, J. She, X. Cui, D. Ki, C.I. Torres, B.E. Rittmann. Intimate coupling of N-doped TiO2 photocatalyst and anode respiring bacteria for enhancing 4-chlorophenol degradation and current generation. Chemical Engineering Journal2017317, 882-889.
  • Y. Park, S. Park, V.K. Nugyen, J. Yu, C.I. Torres, B.E. Rittmann, T. Lee. Complete nitrogen removal by simultaneous nitrification and denitrification in flat-panel air-cathode microbial fuel cells treating domestic wastewater. Chemical Engineering Journal2017316, 673-679. 
  • M. Mahmoud, P. Parameswaran, C.I. Torres, B.E. Rittmann. Electrochemical techniques reveal that total ammonium stress increases electron flow to anode respiration in mixed-species bacterial anode biofilms. Biotechnology and Bioengineering2017114, 1151-1159.
  • D. Ki, P. Parameswaran, S.C. Popat, B.E. Rittmann, C.I. Torres.  Maximizing Coulombic recovery and solids reduction from primary sludge by controlling retention time and pH in a flat-plate microbial electrolysis cell.  Environmental Science: Water Research & Technology2017, 3, 333-339.

2016

  • M.N. Young, M.J. Links, S.C. Popat, B.E. Rittmann, C.I. Torres. Tailoring Microbial Electrochemical Cells for Production of Hydrogen Peroxide at High Concentrations and Efficiencies. ChemSusChem20169 (23), 3345-3352.
  • J.F. Miceli III, C.I. Torres, R. Krajmalnik-Brown. Shifting the balance of fermentation products between hydrogen and volatile fatty acids: microbial community structure and function. FEMS Microbiology Ecology201692 (12), fiw195.
  • B.G. Lusk, P. Parameswaran, S.C. Popat, B.E. Rittmann, C.I. Torres. The effect of pH and buffer concentration on anode biofilms of Thermincola ferriacetica. Bioelectrochemistry2016112, 47-52.
  • O. Sosa-Hernández, P. Parameswaran, G.S. Alemán-Nava, C.I. Torres, R. Parra-Saldívar.  Evaluating biochemical methane production from brewer's spent yeast. Journal of Industrial Microbiology & Biotechnology20166, 1-10.
  • S.C. Popat, C.I. Torres. Critical transport rates that limit the performance of microbial electrochemistry technologies. Bioresource Technology2016215, 265-273.45.      
  • M. Mahmoud, P. Parameswaran, C.I. Torres, B.E. Rittmann. Relieving the fermentation inhibition enables high electron recovery from landfill leachate in a microbial electrolysis cell. RSC Advances20166, 6658 – 6664.
  • D. Ki, S. C. Popat, C. I. Torres.  Reduced overpotentials in microbial electrolysis cells through improved design, operation, and electrochemical characterization.  Chemical Engineering Journal2016287, 181-188.
  • O. Sosa-Hernández, S. C. Popat, P. Parameswaran, G. S. Aleman-Nava, C. I. Torres, G. Buitron, R. Parra-Saldívar.  Application of microbial electrolysis cells to treat spent yeast from an alcoholic fermentation.  Bioresource Technology2016200, 342-349.

2015

  • B. G. Lusk, Q. F. Khan, P. Parameswaran, A. Hameed, N. Ali, B. E. Rittmann, C. I. Torres.  Characterization of electrical current- generation capabilities from thermophilic bacterium Thermoanaerobacter pseudethanolicus using xylose, glucose, cellobiose, or acetate with fixed anode potentials.  Environmental Science & Technology201549 (24), 14725-14731.
  • D. Ki, P. Parameswaran, S. C. Popat, B. E. Rittmann, C. I. Torres.  Effects of pre-fermentation and pulsed-electric-field treatment of primary sludge in microbial electrochemical cells.  Bioresource Technology2015195, 83-88.
  • B. G. Lusk, J. P. Badalamenti, P. Parameswaran, D. R. Bond, C. I. Torres.  Draft genome sequence of the gram-positive thermophilic iron reducer Thermincola ferriacetica strain Z-0001T.  Genome Announcements20153, e01072-15.
  • R. A. Yoho, S. C. Popat, L. Rago, A. Guisasola, C. I. Torres.  Anode biofilms of Geoalkalibacter ferrihydriticus exhibit electrochemical signatures of multiple electron transport pathways.  Langmuir201531, 12552-12559.
  • D. Ki, P. Parameswaran, B. E. Rittmann, C. I. Torres.  Effect of pulsed electric field pretreatment on primary sludge for enhanced bioavailability and energy capture.  Environmental Engineering Science201532, 831-837.
  • J. P. Badalamenti, R. Krajmalnik-Brown, C. I. Torres, D. R. Bond.  Genomes of Geoalkalibacter ferrihydriticus Z-0531T and Geoalkalibacter subterraneus Red1T, Two Haloalkaliphilic Metal-Reducing Deltaproteobacteria.  Genome Announcements20153, e00039-15.

2014

  • R. A. Yoho, S. C. Popat, C. I. Torres.  Dynamic potential-dependent electron transport pathway shifts in anode biofilms of Geobacter sulfurreducens.  ChemSusChem20147, 3413-3419.
  • S. C. Popat, D. Ki, M. N. Young, B. E. Rittmann, C. I. Torres.  Buffer pKa and transport govern concentration overpotential in electrochemical oxygen reduction at neutral pH.  ChemElectroChem20141, 1909-1915.
  • J. F. Miceli III, I. Garcia-Pena, P. Parameswaran, C. I. Torres, R. Krajmalnik-Brown.  Combining microbial cultures for the efficient production of electricity from butyrate in a microbial electrochemical cell.  Bioresource Technology2014169, 169-174.
  • H. Ren, C. I. Torres, P. Parameswaran, B. E. Rittmann, J. Chae.  Improved current and power density with a micro-scale microbial fuel cell due to a small characteristic length.  Biosensors and Bioelectronics201461, 587-592.
  • C. I. Torres.  On the importance of identifying, characterizing, and predicting fundamental phenomena towards microbial electrochemistry applications.  Current Opinion in Biotechnology201427, 107-114.
  • M. Mahmoud, P. Parameswaran, C. I. Torres, and B. E. Rittmann.  Fermentation pre-treatment of landfill leachate for enhanced electron recovery in a microbial electrolysis cell.  Bioresource Technology2014151, 151-158.
  • A. G. Delgado, D. Fajardo-Williams, S. C. Popat, C. I. Torres, and R. Krajmalnik-Brown.  Successful operation of continuous reactors at short retention times results in high-density, fast-rate Dehalococcoides dechlorinating cultures.  Applied Microbiology and Biotechnology201498, 2729-2737.
  • J. P. Badalamenti, C. I. Torres, and R. Krajmalnik-Brown.  Coupling dark metabolism to electricity generation using photosynthetic cocultures.  Biotechnology and Bioengineering2014111, 223-231.

2013

  • P. Parameswaran, T. Bry, S. C. Popat, B. G. Lusk, B. E. Rittmann, and C. I. Torres.  Kinetic, electrochemical, and microscopic characterization of the thermophilic, anode-respiring bacterium Thermincola ferriacetica.  Environmental Science & Technology201347, 4934-4940.
  • J. P. Badalamenti, R. Krajmalnik-Brown, and C. I. Torres.  Generation of high current densities by pure cultures of anode-respiring Geoalkalibacter spp. under alkaline and saline conditions in microbial electrochemical cells.  mBio20134, e00144-13.
  • J. P. Badalamenti, C. I. Torres, and R. Krajmalnik-Brown.  Light-responsive current generation by phototrophically enriched anode biofilms dominated by green sulfur bacteria.  Biotechnology and Bioengineering2013110, 1020-1027.

2012

  • S. Mahendra, P. Gedalanga, S. M. Kotay, C. I. Torres, C. S. Butler, and R. Goel.  Advancements in molecular techniques and applications in environmental engineering.  Water Environment Research201284, 814-844.
  • J. F. Miceli, P. Parameswaran, D. W. Kang, R. Krajmalnik-Brown, and C. I. Torres.  Enrichment and analysis of anode-respiring bacteria from diverse anaerobic inocula.  Environmental Science & Technology201246, 10394-10355.
  • S. C. Popat, D. Ki, B. E. Rittmann, and C. I. Torres.  Importance of OH- transport from cathodes in microbial fuel cells.  ChemSusChem20125, 1071-1079.
  • D. R. Bond, S. M. Strycharz-Glaven, L. M. Tender, and C. I. Torres.  On electron transport through Geobacterbiofilms. ChemSusChem20125, 1099-1105.
  • P. Parameswaran, C. I. Torres, D. W. Kang, B. E. Rittmann, and R. Krajmalnik-Brown.  The role of homoacetogenic bacteria as efficient hydrogen scavengers in microbial electrochemical cells (MXCs).  Water Science and Technology201265, 1-6.

2011

  • R. Goel, S. M. Kotay, C. S. Butler, C. I. Torres, and S. Mahendra.  Molecular biological methods in environmental engineering. Water Environment Research201183, 927-955.
  • C. I. Torres, S. Ramakrishna, C. A. Chiu, K. G. Nelson, P. Westerhoff, and R. Krajmalnik-Brown.  Fate of sucralose during wastewater treatment.  Environmental Engineering Science201128, 325-331.
  • A. K. Marcus, C. I. Torres, and B. E. Rittmann.  Analysis of a microbial electrochemical cell using the proton condition in biofilm (PCBIOFILM) model.  Bioresource Technology2011102, 253-262.
  • P. Parameswaran, C. I. Torres, H. S. Lee, B. E. Rittmann, and R. Krajmalnik-Brown.  Hydrogen consumption in microbial electrochemical systems (MXCs): The role of homo-acetogenic bacteria.  Bioresource Technology2011102, 263-271.
  • S. Choi, H. S. Lee, Y. Yang, P. Parameswaran, C. I. Torres, B. E. Rittmann, and J. Chae.  A microliter-scale micromachined microbial fuel cell having high power density.  Lab on a Chip201111, 1110-1117.

2010

  • A. K. Marcus, C. I. Torres, and B. E. Rittmann.  Evaluating the impacts of migration in the biofilm anode using the model PCBIOFILM.  Electrochimica Acta201055, 6964-6972.
  • P. Parameswaran, H. S. Zhang, C. I. Torres, B. E. Rittmann, and R. Krajmalnik-Brown.  Microbial community structure in a biofilm anode fed with a fermentable substrate: The significance of hydrogen scavengers.  Biotechnology and Bioengineering2010105, 69-78.
  • C. I. Torres, A. K. Marcus, H. S. Lee, P. Parameswaran, R. Krajmalnik-Brown, and B. E. Rittmann.  A kinetic perspective on extracellular electron transfer by anode-respiring bacteria.  FEMS Microbiology Reviews201034, 3-17.

2009

  • C. I. Torres, R. Krajmalnik-Brown, P. Parameswaran, A. K. Marcus, G. Wanger, Y. A. Gorby, and B. E. Rittmann.  Selecting anode-respiring bacteria based on anode potential: Phylogenetic, electrochemical, and microscopic characterization.  Environmental Science & Technology200943, 9519-9524.
  • H. S. Lee, C. I. Torres, P. Parameswaran, and B. E. Rittmann.  Fate of H2 in an upflow single-chamber microbial electrolysis cell using a metal-catalyst-free cathode.  Environmental Science & Technology200943, 7971-7976.
  • H. S. Lee, C. I. Torres, and B. E. Rittmann.  Effects of substrate diffusion and anode potential on kinetic parameters for anode-respiring bacteria.  Environmental Science & Technology200943, 7571-7577.
  • P. Parameswaran, C. I. Torres, H. S. Lee, R. Krajmalnik-Brown, and B. E. Rittmann.  Syntrophic interactions among anode-respiring bacteria (ARB) and non-ARB in a biofilm anode: Electron balances.  Biotechnology and Bioengineering2009103, 513-523.

2008

  • C. I. Torres, H. S. Lee, and B. E. Rittmann.  Carbonate species as OH- carriers for decreasing the pH gradient between cathode and anode in biological fuel cells.  Environmental Science & Technology200842, 8773-8777.7.       
  • M. D. Marsolek, C. I. Torres, M. Hausner, and B. E. Rittmann.  Intimate coupling of photocatalysis and biodegradation in a photocatalytic circulating-bed biofilm reactor.  Biotechnology and Bioengineering2008101, 83-92.
  • C. I. Torres, A. K. Marcus, P. Parameswaran, and B. E. Rittmann.  Kinetic experiments for evaluating the Nernst-Monod model for anode-respiring bacteria (ARB) in a biofilm anode.  Environmental Science & Technology200842, 6593-6597.
  • C. I. Torres, A. K. Marcus, and B. E. Rittmann.  Proton transport inside the biofilm limits electrical current generation by anode-respiring bacteria.  Biotechnology and Bioengineering2008100, 872-881.
  • H. S. Lee, P. Parameswaran, A. K. Marcus, C. I. Torres, and B. E. Rittmann.  Evaluation of energy-conversion efficiencies in microbial fuel cells (MFCs) utilizing fermentable and non-fermentable substrates.  Water Research200842, 1501-1510.

2007 and before

  • A. K. Marcus, C. I. Torres, and B. E. Rittmann.  Conduction-based modeling of the biofilm anode of a microbial fuel cell. Biotechnology and Bioengineering200798, 1171-1182.
  • C. I. Torres, A. K. Marcus, and B. E. Rittmann.  Kinetics of consumption of fermentation products by anode-respiring bacteria. Applied Microbiology and Biotechnology200777, 689-697.
  •  J. Cowman, C. I. Torres, and B. E. Rittmann.  Total nitrogen removal in an aerobic/anoxic membrane biofilm reactor system. Water Science and Technology200552, 115-120.

BOOK CHAPTERS

Research Activity
Fall 2017
Course NumberCourse Title
CEE 492Honors Directed Study
CHE 493Honors Thesis
CEE 493Honors Thesis
CHE 494Special Topics
MBB 495Undergraduate Research
BIO 495Undergraduate Research
CEE 499Individualized Instruction
CHE 592Research
CEE 592Research
CHE 593Applied Project
CEE 593Applied Project
CEE 595Continuing Registration
CHE 598Special Topics
CEE 598Special Topics
CEE 599Thesis
CHE 599Thesis
CEE 790Reading and Conference
CHE 792Research
CEE 792Research
BDE 792Research
CEE 795Continuing Registration
BDE 799Dissertation
CHE 799Dissertation
CEE 799Dissertation
Summer 2017
Course NumberCourse Title
MBB 495Undergraduate Research
CEE 790Reading and Conference
CHE 792Research
BDE 792Research
CHE 795Continuing Registration
CHE 799Dissertation
Spring 2017
Course NumberCourse Title
CHE 231IntroTransport Phenom I:Fluids
CEE 492Honors Directed Study
CEE 493Honors Thesis
BIO 496Undergraduate Thesis
CHE 499Individualized Instruction
CEE 592Research
CHE 592Research
CEE 593Applied Project
CHE 593Applied Project
CEE 595Continuing Registration
SOS 598Special Topics
CEE 599Thesis
CHE 599Thesis
CEE 790Reading and Conference
CHE 792Research
CEE 792Research
CEE 795Continuing Registration
BDE 799Dissertation
CHE 799Dissertation
CEE 799Dissertation
Fall 2016
Course NumberCourse Title
ASU 101-CHEThe ASU Experience
CEE 492Honors Directed Study
CHE 493Honors Thesis
CEE 493Honors Thesis
CHE 494Special Topics
MBB 495Undergraduate Research
BIO 495Undergraduate Research
CEE 499Individualized Instruction
CEE 592Research
CHE 592Research
CHE 593Applied Project
CEE 593Applied Project
CEE 595Continuing Registration
SOS 598Special Topics
BCH 598Special Topics
CHE 598Special Topics
CEE 598Special Topics
CHE 599Thesis
CEE 599Thesis
CEE 790Reading and Conference
BDE 792Research
CEE 792Research
CHE 792Research
CEE 795Continuing Registration
BDE 799Dissertation
CHE 799Dissertation
CEE 799Dissertation
Summer 2016
Course NumberCourse Title
CEE 790Reading and Conference
BDE 792Research
CHE 792Research
CHE 795Continuing Registration
CHE 799Dissertation
Spring 2016
Course NumberCourse Title
CHE 231IntroTransport Phenom I:Fluids
CEE 492Honors Directed Study
CEE 493Honors Thesis
CHE 494Special Topics
CHE 498Pro-Seminar
CHE 592Research
CEE 592Research
CHE 593Applied Project
CEE 595Continuing Registration
SOS 598Special Topics
BCH 598Special Topics
CEE 599Thesis
CHE 599Thesis
CEE 790Reading and Conference
CEE 792Research
CHE 792Research
CEE 795Continuing Registration
BDE 799Dissertation
CHE 799Dissertation
CEE 799Dissertation
Fall 2015
Course NumberCourse Title
CHE 294Special Topics
CEE 492Honors Directed Study
CHE 492Honors Directed Study
CEE 493Honors Thesis
CHE 494Special Topics
CEE 499Individualized Instruction
CHE 592Research
CHE 593Applied Project
CEE 598Special Topics
SOS 598Special Topics
CHE 598Special Topics
CHE 599Thesis
CEE 790Reading and Conference
CHE 792Research
CEE 792Research
BDE 792Research
BDE 799Dissertation
CHE 799Dissertation
Summer 2015
Course NumberCourse Title
BDE 792Research
CHE 792Research
CHE 795Continuing Registration
CHE 799Dissertation
Spring 2015
Course NumberCourse Title
CHE 231IntroTransport Phenom I:Fluids
CHE 294Special Topics
CEE 492Honors Directed Study
CEE 493Honors Thesis
CHE 494Special Topics
CHE 591Seminar
CEE 592Research
CHE 592Research
CHE 593Applied Project
CEE 595Continuing Registration
SOS 598Special Topics
CEE 599Thesis
CHE 599Thesis
CEE 790Reading and Conference
CEE 792Research
CHE 792Research
BDE 792Research
CEE 795Continuing Registration
CHE 799Dissertation
CEE 799Dissertation
BDE 799Dissertation
Fall 2014
Course NumberCourse Title
CHE 294Special Topics
CEE 492Honors Directed Study
CEE 493Honors Thesis
CHE 494Special Topics
CEE 499Individualized Instruction
CHE 591Seminar
CHE 592Research
CHE 593Applied Project
SOS 598Special Topics
BCH 598Special Topics
CHE 599Thesis
CEE 790Reading and Conference
CHE 792Research
BDE 792Research
CEE 792Research
BDE 799Dissertation
CHE 799Dissertation
Summer 2014
Course NumberCourse Title
CHE 592Research
BDE 792Research
CHE 792Research
CHE 795Continuing Registration
CHE 799Dissertation
Spring 2014
Course NumberCourse Title
CHE 231IntroTransport Phenom I:Fluids
CHE 294Special Topics
CEE 492Honors Directed Study
CEE 493Honors Thesis
CHE 494Special Topics
CHE 591Seminar
CEE 592Research
CHE 592Research
CHE 593Applied Project
CEE 595Continuing Registration
SOS 598Special Topics
CEE 599Thesis
CHE 599Thesis
CEE 790Reading and Conference
CEE 792Research
BDE 792Research
CHE 792Research
CHE 795Continuing Registration
CEE 795Continuing Registration
CHE 799Dissertation
CEE 799Dissertation
BDE 799Dissertation
Fall 2013
Course NumberCourse Title
CHE 294Special Topics
CEE 492Honors Directed Study
CEE 493Honors Thesis
CHE 494Special Topics
CEE 499Individualized Instruction
CHE 591Seminar
CHE 592Research
CHE 598Special Topics
CEE 598Special Topics
BDE 792Research
CHE 792Research
BDE 799Dissertation
Summer 2013
Course NumberCourse Title
CEE 590Reading and Conference
CEE 592Research
CHE 595Continuing Registration
CEE 595Continuing Registration
CEE 599Thesis
CEE 790Reading and Conference
CHE 792Research
CEE 792Research
CHE 795Continuing Registration
CEE 795Continuing Registration
CEE 799Dissertation
Spring 2013
Course NumberCourse Title
CHE 231IntroTransport Phenom I:Fluids
CEE 492Honors Directed Study
CEE 493Honors Thesis
CHE 494Special Topics
CEE 592Research
CHE 592Research
CHE 593Applied Project
CEE 595Continuing Registration
CEE 599Thesis
CHE 599Thesis
CEE 790Reading and Conference
CEE 792Research
CHE 792Research
CHE 795Continuing Registration
CEE 795Continuing Registration
CHE 799Dissertation
CEE 799Dissertation