University Rank

Contact Information


Research Interests

Recent Publications

Courses Taught





University Rank

Vice Chancellor for Research and Extension and Professor 10


Contact Information

Department of Chemical Engineering

College of Engineering and Agro-Industrial Technology

University of the Philippines Los Baños

College, 4031 Laguna

T/F: +63 (049) 536-2315; 536-3664; 0917-348-2305

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In-progress Ph.D. in Environmental Science University of the Philippines Los Baños
Under completion Doctor in Engineering Tokyo Institute of Technology, Japan
1990 MSChE University of the Philippines Diliman
1984 BSChE (Cum laude) University of San Agustin, Iloilo City


Research Interests

Plant, process and equipment design

    • Design of Microbial Film Bioreactor for Industry
    • Physico-Chemical Methods of Purification and Recycling of Distillery Slops
    • Design, Fabrication, and Testing of Chemical Process Equipment
    • Design, Fabrication, and Testing of Countercurrent Mixed Flow Condenser
    • Feasibility Study for the Establishment of a Commercial Sweet Sorghum Plantation and a Sweet Sorghum Syrup Processing Plant in the Philippines

Bioethanol, biodiesel and biogas productions, optimization and downstream processes using alternative feedstocks

    • Methyl Ester Production Researches
    • Enzymatic, Solvent, and Mechanical Extraction Researches
    • Biogas Researches
    • Ethanol Fermentation and Distillation Researches
    • Saccharine Feedstocks for the Production of Ethanol and other High Value Products
    • Production of Quality Grade Ethanol from Sweet Sorghum
    • Desktop Study on Napier Plantation as a Potential Source of Biomass Fuel

Bioaviation and biogasoline productions

Life cycle assessment (carbon footprint, water footprint and energetics)

Waste treatment

Adaptability Trial of Super Sweet Sorghum


Recent Publications (Refereed Journals, 2009-Present)

Opulencia, R. B., Bambase, M. E. Jr., Perdigon, K. M. D., Demafelis, R. B., Llamado, A. A., Franco, R. A. G., Mogul, R. T.,and Raymundo, A. K. (Accepted, 2015). Copper-Resistant, Biofilm-Forming Bacteria for Potential Use in Rehabilitation of Copper-Contaminated Wastewater. International Journal of Philippine Science and Technology.

Martinez-Goss, M.R. and Demafelis, R.B. Sensory Evaluation of Some Food Preparations with Nostoc commune Vaucher (Cyanobacteria). Diversity and Conservation Studies on Microalgae in the Philippines. The Philippine Scientist. University of San Carlos Press. ISSN 0079-1466

Mendoza, T.C., Demafelis, R.B., Matanguihan, A.E.D., Malabuyoc, J.A.S., Magadia Jr., R.V., Pector, A.A., Hourani, K.A., Manaig, L.M.A., and Movillon, J.L. The Carbon Footprint of Sugar Production from Sugarcane in the Philippines. The Carbon Footprint Handbook. Florida: CRC Press | Taylor & Francis Group. Forthcoming 2015.

Rañola Jr., R.F., Movillon, J.L., Demafelis, R.B. (2015). The Philippine Biofuels Industry: Defining the Strategic Directions. Department of Agriculture – Bureau of Agricultural Research and University of the Philippines Los Baños.

Valencia, J.M.T., Demafelis, R.B., Borines, M.G., Gatdula, K.M. (2015). Bioethanol Potential of Brown Macroalgae (Sargassum spp.). Philippine Journal of Crop Science. Vol. 40(2): 1-11

Santiago, D.E.O., Demafelis, R.B., Martinez-Goss, M.R., Nacorda, J.O.O., Torreta, N.K., Bataller, B.G., Redondo, M.J.H., Jao, N.L., Dizon, L.S.H. (2013). Design, Fabrication and Performance Evaluation of a Photobioreactor for the Cultivation of Chlorella vulgaris (Beijerinck). Philippine Journal of Crop Science. Vol 38(2): 21-29
Demafelis, R.B., Baticados, E.J.N., Hourani, K.A., Tongko, B.D. (2013). Potential of Bioethanol Production from Sweet Sorghum in the Philippines: An Income Analyses for Farmers and Distilleries. Sugar Tech. Vol 15(3): 225-231.
del Barrio, M. C., Demafelis, R.B., Mercado, S.M., Movillon, J.L., Rebancos, C.M. (2012). Growth Kinetics of Rhizopus chinensis Saito BIOTECH 3273 in the Production of Microbial Rennet Using coconut Paring Cake as Substrate. Philippine Agricultural Scientist. Vol 95(2): 129-138.
Movillon, J.L., Demafelis, R.B., Bautista, R.P., Cordova, K.J., Lacsa, M.C., Viray, D.C. (2012). Effects of Antioxidants Extractedfrom Leaves of “Banaba” (Lagerstroemia speciosa L.), “Mangosteen” (Garcinia mangostana L.) and “Tsaang Gubat” (Ehretia microphylla L.) on the Oxidation Stability of Biodiesel form Jatropha curcas LThe Philippine Journal of Crop ScienceVol 37(1): 1-7.
Razal, R. A., Daracan, V.C., Calapis, R.M., Angon, C.M., Demafelis, R.B. (2011).  Solvent Extraction of Oil from Bani (Pongamia pinnata (L.) Pierre) Seeds.  The Philippine Journal of Crop Science. Vol 37(1): 1-7.
Bambase, M.E. Jr., Demafelis, R.B., Vibal, R.E., Escobar, E.C., Revellame, E., Capunitan, J.E. and L.S.H. Dizon. (2011). Transesterification of Jatropha curcas L. Oil with Petroleum Ether as Dispersal Medium. The Philippine Journal of Crop Science. Vol 36(2): 48-55.
Demafelis, R. B., J. L. Movillon, V. R. Quinoñes, V. P. Migo, M. R. M. Goss, P. C. R. Alberto. (2011). Parametric Study on Dilute Acid Pretreatment and Enzymatic Saccharification of Turbinaria ornata (Phaeophyta) for Hydrolysate Production. Philippine Institute of Chemical Engineers (PIChE) Journal. Vol. 13(1): 77-83.
Del Rosario, E.E., Ranola, R.F. Jr., Demafelis, R.B., Elepaño, A.R., and B.G. Bataller. (2010) Feasibilty of Producing Bioethanol from Cassava Feedstock in the Philippines. The Philippine Journal of Crop ScienceVol. 35 (3): 9-21.
Demafelis, R. B., J. L. Movillon, R.B. Badayos, B.G. Bataller & R.F. Rañola. (2009). Opportunities and Challenges Interphasing the Bioethanol Program with the Philippine Sugarcane Industry. The Philippine Journal of Crop Science. Vol. 34 (1): 99-112.
Ranola, R. F., R. B. Demafelis, E. E. del Rosario and B. G.  Bataller. (2009). Enhancing the Viability of Cassava Feedstock for Bioethanol Production in the Philippines. Journal of International Society of Asian Agricultural Sciences. Vol. 15 No. 12.
Rola, W. R., R. R. Badayos, M. A. Dorado, R. B. Demafelis, R. B. Mendoza, A. A. Dorado. (2009). Towards a Sustainable Mining Waste Management: An Ex-Ante Analysis of a Nickel Mining Project in Narra, Palawan. Journal of Environmental Science and Management. Vol 12 No. 2.
Dela Cruz, F.B., V.P. Migo, S A. Valencia+ and R.B. Demafelis. (2009). Optimization of the Enzymatic Extraction of Oil from the Seeds of Vutalao (Calophyllum inophyllum L.). Philippine Journal of Crop Science Vol. 34 No. 5.
Demafelis, R. B., B. G. Bataller, R.R. A. L. Cortado, B. Villacorte, L. J. Pham, E.D. Revellame, V. A. Rodolfo and M. G. Borines. (2009). Parametric Study on the Production of Biodiesel from Transesterification of Jatropha curcas L. oil Using Various Alcohols and Base Catalysts.   Philippine Journal of Agricultural and Biosystems EngineeringVol 7.51-58.


Courses Taught

Undergraduate Courses 

ChE 31 Introduction to Chemical Engineering
ChE 32 Industrial Stoichiometry
ChE 145 Chemical Reaction Engineering
ChE 152 Separation Processes
ChE 153 Transfer Operation I
ChE 154 Transfer Operation II
ChE 155 Chemical Engineering Unit Operations Laboratory I
ChE 156 Chemical Engineering Unit Operations Laboratory II
ChE 192  Chemical Process Equipment Design
ChE 193  Plant Design
ChE 172 Biochemical Engineering
PPT 192  Pulp and Paper Engineering
PPT 193  Pulp and Paper Plant Design
ChE 185 Chemical Engineering Laws, Contracts and Ethics
ChE 191 Special Topics in Chemical Engineering
Chem 177 Biochemical Technology I

Graduate Courses 

ChE 245 Advanced Chemical Reaction Engineering 
ChE 283 Biological Wastewater Treatment Design
ChE 291 Wastewater Treatment Design
ChE 284 Solid Waste Management
ChE 286 Air Quality and Pollution Engineering



2014 UPLB Outstanding Senior Researcher in Natural Sciences, UPLB

2014 Alumni Achievement Awardee in Science and Technology, University of San Agustin Alumni Association (USAAA)

2013 Outstanding Professional of the Year Award, Professional Regulation Commission (PRC)

2013 Outstanding Chemical Engineer of the Philippines Award, Philippine Institute of Chemical Engineers

2011 University of the Philippines Alumni Association (UPAA) Outstanding Alumni in Chemical Engineering

2010 UPLB College of Engineering and Agro-Industrial Technology Distinguished Alumnus in Biofuels Research and Development

2010 Fellow of the Philippine Institute of Chemical Engineers (PIChE)

2010 Regional Commission on Higher Education (CHEd) RePublica Award

2009 Outstanding Researcher College of Engineering and Agro-Industrial Technology, UPLB

2006 UPLB Outstanding Teacher Award in Physical Sciences

2005 Certificate of Recognition, Board of Chemical Engineering, PRC

2004 Presidential Award, Philippine Institute of Chemical Engineers

2012  International Publication Awardee, The UP President’s Award for Academic Distinction, University of the Philippines



Philippine Institute of Chemical Engineers, 1984-present (National President 2004-2005)

Japan Society of Chemical Engineers, 1995

American Institute of Chemical Engineers, 1995

Technical Association of Pulp and Paper Industry of the Philippines, 1998

UPLB Chemical Engineering Alumni Association


CEAT Student Council Newsletter

CSC Report


Research Grants


Contact Us

Office of the Dean
Tel: +63 49 536 2873+63 49 5364728
Fax: +63 49 536 2873

Office of the College Secretary
Tel: +63 49 536 7450

Visit Us

College of Engineering &
Agro-industrial Technology,
UP Los Baños, College 4031
Laguna, Philippines

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