• Education:
    • Bachelor degree in chemical engineering (S.T.). Gadjah Mada University, Yogyakarta, DIY, Indonesia.1991-1996 – Graduated cum laude with GPA of 3.71 (scale of 4). Research: Two-step alcoholysis to produce biodiesel. Final design project: Preliminary design of amyl alcohol plant from amyl chloride
    • Master degree in chemical engineering (M.T.). Gadjah Mada University, Yogyakarta, DIY, Indonesia. 1996-1999 – Graduated cum laude with GPA of 4 (scale of 4). Thesis: Thermodynamic model for liquid-liquid equilibrium of water-citric acid- (triisooctyl amine) system
    • Doctorate degree in chemical engineering (Ph.D). West Virginia University, Morgantown, WV, USA. 2000-2003. Graduated with GPA of 4 (scale of 4). Dissertation: Basic theory and experimental approach to characterize flow and fracture properties of fine powder bulk body.

 

  • Awards and Fellowships
    • 2015: ASEAN-US Science and Technology Fellowship (sponsored by USAID)
    • 2013: The best research-based appropriate technology application, Gadjah Mada University
    • 2011: The best research based community service, Gadjah Mada University
    • 2009: Schlumberger’s Faculty for the Future Fellowship for visiting researcher in Cornell University, USA
    • 2007: L’OREAL-UNESCO National Fellowship Program for Women in Science for purification of PHB biopolymer
    • 2003: Asia Rice USA Foundation Study Award (as principal researcher) in kinetics of biological nitrogen fixation of cyanobacteria as biofertilizer for wetland rice fields.
    • 1999: Best paper in National Symposium of Chemical Engineering, Faculty of Engineering, University of Indonesia.

 

  • Employment:
    • Faculty member of Chemical Engineering Department. Gadjah Mada University, Yogyakarta, DIY, Indonesia. 1996-present.

 

  • Career-related work experience:
    • Postdoctoral research associate. Conducted a research project on the design of horizontal plug flow reactor for anaerobic digestion of cattle manure (the project was funded by Schlumberger Foundation’s Faculty for the Future Program). The Angenent Lab. Department of Biological and Environmental Engineering. Cornell University, NY, USA. July 6, 2009 – April 15, 2010
    • Guest lecturer in Magister of Engineering Systems, Universitas Gadjah Mada in Food Engineering Course. 2007-2010
    • Guest lecturer in Faculty of Pharmacy, Universitas Sanata Dharma Yogyakarta in powder technology. 2006-2014
    • Technical consultant in Yogya Quality Assurance for chemical processes. February 2006.
    • External reviewer for research proposals. IST Akprind’s Office of Research and Community Services. 2004.
    • Guest lecturer in Faculty of Animal Husbandry Universitas Gadjah Mada for Unit Operation Course. 2004-2007
    • Postdoctoral research associate. Conducted a research project on hybrid neural networks model to predict cyanobacterial growth rate and their nitrogen fixation rate in the presence of inorganic ammonium ions (the project was funded by the Asia Rice Foundation USA). Bioreaction Engineering Laboratory. Chemical Engineering Department, West Virginia University, Morgantown, WV, USA. January 1, 2004 – June 30, 2004.
    • Teaching assistant in undergraduate courses (Numerical Methods for Chemical Engineering, Process Fluid Mechanics, Chemical Engineering Transport Analysis, Chemical Process Design) and graduate course (Advanced Mathematical Methods in Chemical Engineering). Chemical Engineering Department West Virginia University, Morgantown, WV, USA. 2001-2004.

 

  • Leadership experience:

 

    • Head of Master Study Program, Chemical Engineering Department, Universitas Gadjah Mada
    • Secretary of National Electrical Vehicle (Molina) Project, Faculty of Engineering, Gadjah Mada University. 2014-2015
    • General Secretary of Regional Conference on Chemical Engineering, AUN Seed Net/JICA2014
    • PiC of Chemical Engineering Department for University Partnership Program UGM-Chevron (under faculty of Engineering). 2012-current
    • Coordinator for PHKI Theme D Program (Internasionalization). Chemical Engineering Department. Gadjah Mada University. 2011-2013
    • Team Leader for World Class Research University Program. Chemical Engineering Department. Gadjah Mada University. 2009-2011
    • Deputy Chairman for Research, Collaboration, and Alumni Affairs. Chemical Engineering Department. Gadjah Mada University. 2007-current
    • Head of Food and Bioprocess Engineering Laboratory. Chemical Engineering Department.Gadjah Mada University. 2006-2012
    • General Secretary in Organizing Committee of Regional Seminar on Chemical Engineering (RSCE 2007). Hosted by Chemical Engineering Department. Gadjah Mada University
    • Coordinator of Program III (Linking Academic Programs to Government and Industry) B Scheme Excellence Program. Chemical Engineering Department. Gadjah Mada University.2006-2008
    • Secretary in Organizing Committee of International Bioprocess Meeting (held in Faculty of Engineering, Gadjah Mada University, November 2006)
    • Secretary in Organizing Committee of National Gas Seminar (held in Faculty of Engineering, Gadjah Mada University, September 2004)
    • Graduate Safety Officer of Graduate Student Organization (GSO) in Chemical Engineering Department. West Virginia University, Morgantown, WV, USA. September 2001 – September 2002

 

  • Research/industrial experience

 

    • 2016: Feasibility study on organic fertilizer plant to mix compost from municipal solid waste and palm oil empty fruit bunch to achieve national target of organic fertilizer production in 2030 (collaboration with PT. Pupuk Indonesia)
    • 2016: Study on environmental impact and technoeconomic analysis of community-based miniplant to produce refuse-derived fuel (RDF) from municipal solid waste for alternative fuel in cement industry (collaboration with PT. Indocement Palimanan)
    • 2015-2017: Palm Oil Fund – Design of Anaerobic Fluidized Bed Reactor (AFBR) for biogas production from palm oil mill effluent (POME)
    • 2014-2016: CLEAN Project – conversion of municipal solid waste leachate into energy (PEER Science USAID/NSF)
    • 2013: Basic Engineering Design of Anaerobic Digestion for Biogas Production from Municipal Solid Waste (PT. Pertamina – Gas Directorate)
    • 2012: Production of site specific and slow released organic fertilizer (funded by the Multidisciplinary Research Grant from LPPM UGM)
    • 2010: Biogas purification for biogas storage in pressurized tank (funded by Koperasi Wanabakti Nusantara)
    • 2009: Faculty for the Future Fellowship from Schlumberger Fundation for development of low cost biodigester for household biogas production
    • 2009: Strategic Research Grant (from Indonesian Government) for development of compressed biogas for household energy supply (as team member)
    • 2008: Collaborative Research Grant from Directorate of Higher Education (as partner institution) in purification and characterization of carageenan.
    • 2007: Hi-Link Project (funded by JICA Japan) to develop low cost portable biodigester for rural energy self-sufficiency (as team member)
    • 2007: Collaborative Research Grant from Directorate of Higher Education (as partner institution) in standardization of natural dye powder.
    • 2007: Faculty of Engineering Research Grant (as principal researcher) in granule size distribution and granule composition distribution in mixed powder batch granulation of pharmaceutical ingredients
    • 2006: Industrial project from PT. Petrokimia Gresik (as team member) in purification of Fe-contaminated HCl B.
    • 2004: International Joint Research (as team member) in purification of microbial intercellular poly-b-hydroxy butyrate from fermentation broth.
    • 2000-2003: Dissertation in rheological behavior of fine powder bulk body, funded by QUE Project (from World Bank through Indonesian Directorate General for Higher Education)
    • 1996-1998 : Master thesis in equilibrium of reactive extraction in the system of citric acid-water-(TIOA + MIBK), funded by URGE fellowship (from World Bank through Indonesian Directorate General for Higher Education)

 

  • Community services:
    • 2013: Initiating of Organic Soap production from wasted milk in Samar Village, Kabupaten Tulungagung (funded by PHKI Program, as team leader)
    • 2012: Improving the productivity of home industries in rural areas by introduction of energy-saving strategies as an appropriate technology in Sidoharjo Village, Samigaluh, Kulonprogo (funded by PHKI Tema D JTK, as team leader)
    • 2012: Application of appropriate technology for rural community to improve the social and economical impact of biogas technology (funded by The Directorate of Higher Education)
    • 2011: Establishment of zero-waste small/medium industrial cluster in Samigaluh, Kulonprogo (as team leader)
    • 2011: Conserving water resources with productive activities (dairy villages in Tulungagung), supported by Asian Neighbors Program, Toyota Foundation, Japan
    • 2010: Establishment of zero-waste small/medium industrial cluster in Samigaluh, Kulonprogo (as team leader)
    • 2010: Mentor in L’Oreal Girl Science Camp in Bogor
    • 2009: Development of low cost portable biodigester for biogas production, establishment of zero-waste small/medium industrial cluster in Samigaluh, Kulonprogo (as team leader), improving female participation in economic activities in Samigaluh, Kulonprogo (as team leader)
    • 2008: Establishment of zero-waste small/medium industrial cluster in Samigaluh, Kulonprogo (as team leader), facilitator in workshop for local governments on optimizing local potentials for sustainable energy resources in ChAIN Center Chemical Engineering Department, facilitator in community forum for biogas introduction, Kabupaten Klaten, Mentor in L’Oreal Girl Science Camp in Pasir Mukti Bogor
    • 2007: Development of horizontal continuous biodigester in Pundong, Bantul (as team member), Mentor in L’Oreal Girl Science Camp in Kebun Raya Bogor
    • 2006: Development of floating dome biodigester in Pandansimo, Bantul (as team member)

 

  • Member of society:

 

International affiliate member of American Chemical Society (since 2003)

Indonesia Association of Food Technologist (since 2007)

Associate member of Institute of Chemical Engineers IChemE (since 2009)

 

  • Proficiency:
    • Foreign language: English (active, written/spoken)

 

  • Publications :

 

    1. Amel, Sri Ismiyati Damayanti, Simparmin Ginting, and Wiratni Budhijanto (2017), Pengaruh modifikasi zeolite dengan impregnasi Fe & Mg dan inoculum kotoran sapi terhadap anaerobic digestion POME, Proceeding of Quality in Research International Conference, Nusa Dua Bali.
    2. Hanifrahmawan Sudibyo, Yano Surya Pradana, Budhijanto, Wiratni Budhijanto (2017), Bio-synthesis of Eicosapentaenoic Acid (EPA) from Palm Oil Mill Effluent using Anaerobic Process, Materials Science Forum / 7th ICEIM 2017 – Tokyo.
    3. Laily Isna Ramadhani, Sri Ismiyati Damayanti, Wiratni Budhijanto (2017), Kinetics of Anaerobic Digestion of Palm Oil Mill Effluent (POME) in Batch Reactor with Recirculation and Fluidization of Microbial Immobilization Media, Proceeding of Quality in Research International Conference, Nusa Dua Bali.
    4. Melly Mellyanawati, Firda Chusna Mahira, and Wiratni Budhijanto (2017), Influence of Nutrient Addition into Zeolite as Microbial Immobilization Media in Anaerobic Digestion of POME, Proceeding of Quality in Research International Conference, Nusa Dua Bali.
    5. Muhammad Mufti Azis, Hanifrahmawan Sudibyo, Wiratni Budhijanto (2017), Modeling lab-sized Anaerobic Fluidized Bed Reactor (AFRB) for Palm Oil Mill Effluent (POME) treatment: from batch to continue reactors, Proceeding of Quality in Research International Conference, Nusa Dua Bali.
    6. Rochim Bakti Cahyono, Sri Ismiyati Damayanti, Wiratni Budhijanto (2017), Characterization of Modified Zeolite as Microbial Immobilization Media on POME Anaerobic Digestion, Proceeding of Quality in Research International Conference, Nusa Dua Bali.
    7. Wiratni Budhijanto, Sholahuddin Al Ayubi, Hanifrahmawan Sudibyo (2017), Evaluation of a Pilot-Scale Anaerobic Fluidized Bed Reactor for Landfill Leachate Treatment during Start-Up Period, Proceeding of Quality in Research International Conference, Nusa Dua Bali.
    8. Budhijanto, W., Darlianto, D., Pradana, Y.S., and Hartono, M., (2016). Application of micro bubble generator as low cost and high efficient aerator for sustainable fresh water fish farming. International Seminar on Fundamental and Applied Chemical Engineering, Institut Teknologi Surabaya.
    9. Primaningtyas, A., Budhijanto, W., Fahrurrozi, M., and Kusumastuti, Y., (2016). The effects of surfactant and electrolyte concentrations on the size of nanochitosan during storage. Proceeding of International Seminar on Fundamental and Applied Chemical Engineering, Institut Teknologi Surabaya.
    10. Halim, L., Mellayanawaty, M., Cahyono, R.B., and Budhijanto, W, (2016). Anaerobic digestion of palm oil mill effluent with Lampung natural zeolite as microbial immobilization medium and digested cow manure as starter. Proceeding of International Seminar on Fundamental and Applied Chemical Engineering, Institut Teknologi Surabaya.
    11. Sudibyo, H., Guntama, D., and Budhijanto, W., (2016) Assessment of start up mechanisms for anaerobic fluidized bed bioreactor in series based on mathematical simulation, (2016). Proceeding of International Seminar on Fundamental and Applied Chemical Engineering, Institut Teknologi Surabaya.
    12. Ayu, E.D., Halim, L., and Budhijanto, W., (2016). Evaluation on the effect of natural zeolite as microbial immobilization medium in anaerobic digestion for various concentrations of palm oil mill effluent using digested biodiesel waste as inoculum. Proceeding of International Seminar on Fundamental and Applied Chemical Engineering, Institut Teknologi Surabaya.
    13. Hari, P.A, Halim, L., and Budhijanto, W., (2016). Enhancement of biogas production in anaerobic treatment of palm oil mill effluent by the addition of digested biodiesel waste as inoculum and microbial immobilization using natural zeolite. Proceeding of International Seminar on Fundamental and Applied Chemical Engineering, Institut Teknologi Surabaya.
    14. Budhijanto, W., Sudibyo, H., Purnomo, W.P., Syamsiah, S., Widhyasih, K., and Ivontianti, W.D., (2016). Comparison between performance of fixed bed and fluidized bed reactors with natural zeolite/bentonite as microbial immobilization media for anaerobic digestion of stillage. Proceeding of International Conference on Chemical Engineering in conjunction with Soehadi Reksowardojo National Seminar on Chemical Engineering, Institut Teknologi Bandung
    15. Kristanty, T., Sudibyo, H., Mellyanawaty, M., and Budhijanto, W., (2016). Mathematical modeling to evaluate the distribution of leachate discharge into the water streams around Piyungan Landfill Site. Proceeding of International Conference on Chemical Engineering in conjunction with Soehadi Reksowardojo National Seminar on Chemical Engineering, Institut Teknologi Bandung
    16. Pratiwi, W., Mellyanaway, M., Sudibyo, H., and Budhijanto, W., (2016). Substrate adsorption effects of natural zeolite as the microbial immobilization medium in anaerobic treatment of landfill leachate. Proceeding of International Conference on Chemical Engineering in conjunction with Soehadi Reksowardojo National Seminar on Chemical Engineering, Institut Teknologi Bandung
    17. Prastyo, E., Sudibyo, H., and Budhijanto, W., (2016). Determination of the optimum hydraulic retention time in double stage anaerobic fluidized bed bioreactor for landfill leachate treatment, Proceeding of International Conference on Chemical Engineering in conjunction with Soehadi Reksowardojo National Seminar on Chemical Engineering, Institut Teknologi Bandung
    18. Guntama, D., Sudibyo, H., and Budhijanto, W., (2016). Landfill leachate digestion using single stage anaerobic fluidized bed bioreactor with natural zeolite powder as microbial immobilization medium. Proceeding of International Conference on Chemical Engineering in conjunction with Soehadi Reksowardojo National Seminar on Chemical Engineering, Institut Teknologi Bandung.
    19. Shabrina, Z, Halim, L.,. and Budhijanto, W. (2015). Peningkatan Produksi Biogas dari Lindi dengan Variasi Jumlah Zeolit sebagai Media Imobilisasi Bakteri Anaerob. Prosiding Seminar Nasional Teknik Kimia Indonesia. Yogyakarta, 12-13 Oktober 2015.
    20. Hastuti, R.T., Halim, L., and Budhijanto, W. (2015). Peningkatan Produksi Biogas dari Lindi dengan Variasi Jenis Media Imobilisasi Bakteri Anaerob. Prosiding Seminar Nasional Teknik Kimia Indonesia. Yogyakarta, 12-13 Oktober 2015.
    21. Budhijanto, B, Nugraheni, P.S., and Budhijanto, W. (2015). Inhibition of Microbial Growth by Nano-chitosan for Fresh Tilapia (Oreochromis sp.) Preservation. Procedia Chemistry (16). 663-672.
    22. Deendarlianto, D., Wiratni, W., Tontowi, A., Indarto, I., & Iriawan, A. (2015). The Implementation of a Developed Microbubble Generator on the Aerobic Wastewater Treatment. International Journal Of Technology, 6(6), 924-930. doi:10.14716/ijtech.v6i6.1696
    23. Budhijanto, W., Deendarlianto, D., Kristiyani, H., & Satriawan, D. (2015). Enhancement of Aerobic Wastewater Treatment by the Application of Attached Growth Microorganisms and Microbubble Generator. International Journal Of Technology, 6(7), 1101-1109. doi:10.14716/ijtech.v6i7.1240
    24. Usack, J.G., Budhijanto, W., and Angenent, L.T., 2014, Improved design of anaerobic digesters for household biogas production in Indonesia: one cow, one digester, and one hour of cooking per day, The Scientific World Journal.
    25. Budhijanto, W, Kristiyani, H, Cahyaningrum, M, Anggita, WI, and Deendarlianto, 2013, “Preliminary study on the application of microbubble generator to enhance the performance of aerobic waste water treatment with attached growth microorganism”, Regional Conference on Chemical Engineering, Manila 2-3 Desember.
    26. Wresta A. and Budhijanto, W., 2012, “The effect of the addition of active digester effluent for start-up accelerator in anaerobic digestion of soybean curd industry waste water – basic research for biogas based power generation”, Journal of Mechatronics, Electrical Power, and Vehicular Technology”, vol 3 No 2, 81-86.
    27. Budhijanto, W., Purnomo, C.W., and Siregar, N.C., 2012, “Simplified mathematical model for quantitative analysis of biogas production rate in a continuous digester”, Engineering Journal, vol.16 (5), pp. 1-10.
    28. Wiratni and Gibran, M.A., 2012, Simplified Mathematical Model For Quantitative Analysis Of Anaerobic Co-Digestion Of Stillage And Cow Manure, Regional Conference on Chemical Engineering, Kuala Lumpur, Malaysia.
    29. Wiratni, 2012, Simplified Mathematical Model for Quantitative Analysis of Biogas Production Rate in a Continuous Digester, Regional Conference on Biotechnology, Bangkok, Thailand.
    30. Wiratni and Angenent, LT., 2010, Improved Design Of Low-Cost Anaerobic Digesters For Household Biogas Production In Indonesian Rural Areas, CHEMECA 2010, Adelaide, Australia
    31. Wiratni and Ambar Pertiwiningrum, 2009, Enhancement of Methane Formation in Biogas Production by Addition of Landfill Leachate and Rumen Liquid, International Conference on Sustainable Energy, ITB, June 2009
    32. Wiratni and Subandiyono, 2009, Enhancement of Methane Formation in Biogas Production by Addition of Landfill Leachate, Regional Conference on Chemical Engineering, De La Salle University, Manila, January 2009
    33. Wiratni and Purnomo, CW, 2008, Optimization of Continuous Bio-Digester: Part 2. Quantitative Analysis on Biogas Formation Rate and Product Composition, Sriwijaya International Seminar on Energy and Sustainable Technology (SISEST), University of Sriwijaya, Palembang, November 2008.
    34. Sucipto, Mohammad Iqbal Javi, dan Wiratni, 2007, “Purifikasi Alkaloid Piperine dari Ekstrak Biji Lada Putih Bangka dengan Teknik Kristalisasi”, Seminar Nasional Teknik Kimia UNDIP, Juli 2007.
    35. Rahman, ZS, Wiratni, Syamsiah, S., and Redyowati, S., 2007, “Kinetics Model on Growth, Substrate Consumption, and Accumulation of Intracellular PHB by Cupriavidus necator (CCUG 52238 T)”, Seminar Nasional Teknik Kimia UNPAR, April 2007.
    36. Putra, JA, Wiratni, Syamsiah S., and Redyowati, S., 2007, “Kinetics of Lysis and Extraction of Intracellular PHB by Cupriavidus necator (CCUG 52238 T) using Differential Method by H2O2-Chloroform”, Seminar Nasional Teknik Kimia UNPAR, April 2007.
    37. Syamsiah, S, Redyowati, S, Wiratni, Mutiari, A, Irmafilda, and Harnomo, 2006, “Optimization of poly hydroxy butyrate production from wastes of starch industries by indigeneous amylolytic microorganism: I. Effect of raw materials and fermentation conditions on PHB production”, Seminar Nasional Teknik Kimia, Palembang, July 2006.
    38. Wiratni, Syamsiah, S, Redyowati, S, Paramesti, A, Bahua, H, de Rooy, SL, and Wahyuni ET, 2006, “Optimization of poly hydroxy butyrate production from wastes of starch industries by indigeneous microorganism: II. Effect of recovery techniques on process efficiency and product crystallinity”, Seminar Nasional Teknik Kimia, Palembang, July 2006.
    39. Cahyono, R.B., Wiratni, Syamsiah, S., and Redyawati, S., 2006, “Effect of Starch Concentration on the Production Rate of by Amylolytic Bacteria from the Waste of Tapioca Industry”, Prosiding Seminar Nasional Teknik Kimia “Kejuangan”, UPN Veteran Yogyakarta.
    40. Christiani, Y, Wiratni, Syamsiah, S., and Redyawati, S., 2006, “Effect of Variation of Carbon Source on the Production Rate of by Amylolytic Bacteria from the Waste of Tapioca Industry”, Prosiding Seminar Nasional Teknik Kimia “Kejuangan”, UPN Veteran Yogyakarta.
    41. Wiratni and Yang, RYK, 2005, “Mathematical Modeling for Optimization of Biological Nitrogen Fixation in the Presence of Inorganic Nitrogen Fertilizer”, Proceeding of  International Rice Conference, Bali, 12-14 September 2005.
    42. Wiratni, W. and Kono, H.O., 2005, “Determination of Intrinsic Minimum Bubbling Velocity in Fine Powder Aerations Based on Experimentally measured Elastic Deformation Coefficients”, The Canadian Journal of Chemical Engineering, 83(3), 418-424.
    43. Wiratni, W. and Kono, H.O., 2004, “A New Method to Determine the Minimum Bubbling Velocity in Fine Powder Aeration by Using Experimentally Measured Elastic Deformation Coefficient”, Proceeding of Fluidization XI International Conference, Ischia (Naples), Italy, May 9-14, 2004.
    44. Budi, D.T., Mahanani, L., Wiratni, and Sediawan, W.B., 2001, “Model Verification on Equilibrium in the Distribution of the System of Citric Acid -Water-(TIOA +DIBK), Prosiding Seminar Nasional Teknologi dan Proses Kimia III, 21 Maret 2001.
    45. Wiratni, Tyoso, B.W., and Sediawan, W.B., 2001, “Analysis of Liquid-liquid Equilibrium in the System of Citric Acid-Water-(Triisooctyl amine + Methyl Isobuthyl Ketone) using a Quasi-Physical Approximation”, Ind. Eng. Chem. Research, 40 (2), 668-673.
    46. Wiratni, Tyoso, B.W., and Sediawan, W.B., 1998, “Analysis of Liquid-liquid Equilibrium in Citric Acid – Water – (TIOA + MIBK) System”, Proceedings of FT UI Seminar 98, 4-7 Agustus 1998.

 

  • Experience as student research supervisor:

 

    • Bioleaching of Li from spent batteries (S1/S2, 2014-2016)
    • Conversion of MSW leachate into biogas (S1/S2, 2014-2016)
    • Nano-chitosan for fish preservation (S1/S2/S3, 2014-2016)
    • Site Specific and Slow Released Fertilizer (S1/S2, 2012)
    • Aerobic digestion with Microbubble Generator (S1/S2, 2012)
    • Hydrogel from carrageenan (S3, 2011)
    • Edible film from chitosan (S3, 2011)
    • Granulation of biofertilizer for slow released fertilizer (S1, 2007)
    • Effect of potential redox on biogas production from slaughterhouse waste and vinase (S2, 2006)
    • Purification of piperin from white pepper extract by crystallization (S1, 2006)
    • Food preservation by osmotic dehydration (S1, 2004)
    • Preservation of lycopene from fresh tomato juice by freeze drying (S1, 2004)
    • Optimum carbon source for amylolytic bacteria producing PHB (S1, 2004)
    • Optimum harvesting time to maximize PHB yield in batch fermentation (S1, 2004)
    • Factorial comparison of sodium hypochlorite and hydrogen peroxide as lysis agents in PHB purification (S1, 2005)
    • Effect of heat shock in lysis efficiency for PHB production (S1, 2005)
    • Purification of piperine from white pepper extract by crystallization (S1, 2006)
    • Upgrading banana starch to resistant starch by crystallization technique (S1, 2006)
    • Kinetics and equilibrium mathematical models in PHB purification using hydrogen peroxide (S1, 2006)
    • Design of digester for biogas production from slaughterhouse wastes (S2, 2006)
    • Co-digestion of cow manure and landfill leachate to produce biogas (S2, 2008)
    • Optimization of feed composition in anaerobic digestion of stillage into biogas (S1 and S2, 2009)