Jerry  D. Murphy


Jerry D. Murphy

Contact Details:


Lead PI/Lecturer




Dr. Jerry D Murphy has a Masters Degree in Anaerobic Digestion (1991 - 1992) and a PhD in energy production from waste (1999 – 2003). He is the Lecturer in Transportation Engineering in University College Cork and Principal Investigator (PI) in Bioenergy and Biofuels in the Environmental Research Institute (ERI). He has supervised to completion 25 postgraduate students and has served as an external examiner to PhD and postgraduate candidates in Universities in Finland, the UK and Ireland.

Jerry served as the International Energy Agency (IEA) Country Representative for Ireland for Task 39 Liquid Biofuels (2007 - 2009) and IEA Task 37 Energy from Biogas (2010 - present). He is an editor of the IEA commissioned book: “The Biogas Handbook: Science, Production and Applications”. He is lead author on a recent IEA publication (Murphy JD, Braun R, Weiland P, Wellinger A (2011) “Biogas from crop digestion”.

Jerry has served as Chair of an International Energy Agency (IEA) Biofuels conference in Cork in September 2008, an Environmental Protection Agency (EPA) conference on Grass Biomethane in UCC in April 2010 and an International Energy Agency (IEA) Biogas Conference in Cork in September 2011. He has delivered keynote/invited lectures at a number of conferences including: The European Grassland Federation Conference, Iceland (2013);The World Renewable Energy Conference, Denver (2012), the International Energy Farming Congress in Papenburg, Germany (2011), the European Grassland Federation Conference, Kiel (2010) and the German Bioenergy Association, Berlin (2009).

He has written 62 peer review journal papers (58 published, 4 in review) and 30 peer review conference papers; this work has been cited ca. 1620 times in peer review press (H Factor 23). Jerry serves as a referee on numerous peer review journals and is on the Editorial Board of Renewable Energy.

Since 2007 he has secured ca. €3 million funding to study: gaseous transport fuels; design of digesters for high solid content feed stocks; life cycle analyses of various biofuel systems.

Research Projects:

SFI MaREI Marine Renewable Energy Ireland. Sept 2013 – Sept 2019. €1.2M

Marie Curie ITN ATBEST. Sept 2013 – Sept 2017. €240,000

Biogas from Grass: Teagasc Walsh Fellowship. July 2012 – June 2016. €80,000

Optimal production of Renewable Gas: Science Foundation Ireland. September 2011 – August 2015 €182,000

Biomethane Laboratory: Higher Education Authority/Bord Gais Networks/University College Cork. 2011 – 2013 €250,000

Biomethane from residues: IRCSET Enterprise Partnership with Bord Gais Eireann. July 2010 – June 2013, €72,000

GreenGrass: Developing grass for sustainable renewable energy and value added products: Dept of Agriculture Fisheries and Food (DAFF) Stimulus Fund: December 2007 – December 2012: UCC Funding: €278,301

An evaluation of optimal biodiesel in a Northern European Context: HEA PRTLI Cycle 4 ERI. October 2007 – October 2010, €144,044

Compressed biomethane generated from grass, Environmental Protection Agency, December 2007 – May 2010, Funding €296,110.

Utilisation of compressed natural gas and biomethane as a transport fuel in Ireland, Bord Gas Eirean (BGE). Nov 2007 – Sept 2010. €100,000:


Under review:

  1. Wall, D., O’Kiely, P., Murphy, J.D. (2013). The potential for biomethane from grass and slurry to satisfy renewable energy targets. Bioresource Technology (Impact Factor (IF) 4.546).
  2. Browne, J., Allen, E., Murphy J.D. (2013). Assessing biomethane production from the organic fraction of municipal solid waste in batch and continuous operation. Bioresource Technology (IF 4.546).
  3. Browne, J., Murphy, J.D. (2013). The impact of increasing organic loading in two phase digestion of food waste, Waste Management (Impact factor (IF) 2.801).
  4. Fierro, J., Gómez, X., Murphy, J.D. (2013) Potential for second generation gaseous transport biofuel based on pig slurries in Spain, Applied Energy (IF 4.546)


  1. Browne, J., Allen E., Murphy, J.D. (2013) Improving hydrolysis in multiphase digestion of food waste. Waste Management 10.1016/j.wasman.2013.06.025 (IF 2.801).
  2. Allen, E., Browne, J., Hynes, S., Murphy, J.D. (2013) The potential of algae blooms to produce renewable gaseous fuel. Waste Management (IF 2.801).
  3. Browne, J., Allen, E, Murphy, J.D. (2013) Evaluation of biomethane potential from multiple waste streams for a proposed community scale anaerobic digester. Environmental Technology DOI:10.1080/09593330.2013.812669 (IF 1.406)
  4. Allen, E., Browne, J., Murphy, J.D. (2013) Evaluation of biomethane potential from co-digestion of nitrogenous substrates. Environmental Technology DOI:10.1080/09593330.2013.806564 (IF 1.406)
  5. McEniry, J., Allen, E., Murphy, J.D., O’Kiely, P. (2013). Grass for biogas production: the impact of silage fermentation characteristics on methane yield in two contrasting biomethane potential test systems. Renewable Energy (IF 3.2)
  6. Orozco, A., Nizami, A.S., Murphy J.D., Groom, E (2013). Optimizing the Thermophilic Hydrolysis of Grass Silage in a Two-Phase Anaerobic Digestion System. Bioresource Technology 143 (2013) 117–125 (IF 4.546)
  7. Gallagher, C., Murphy, J.D. (2013) What is the realistic potential for biomethane from thermochemical routes to meet renewable energy heat targets? Applied Energy 108, 158-167 (IF 4.546)
  8. Gallagher, C., Murphy, J.D. (2013) Is it better to produce biomethane via thermochemical or biological routes? An energy balance perspective. Biofuels, Bioproducts, Biorefining 7:273–281 (IF 4.885).
  9. Murphy, J.D., Browne, J., Allen, E., Gallagher, C. (2013) The resource of biomethane, produced via biological, thermal and electricial routes, as a renewable transport fuel, Renewable Energy, 55: 474-479 (IF 3.2)
  10. Browne, J., Murphy, J.D., (2013) Assessment of the resource associated with biomethane from food waste, Applied Energy, 104: 170–177 (IF 4.546)


  1. Thamsiriroj, T., Nizami, A.S., Murphy, J.D. (2012) Use of modelling to generate design parameters for a two-phase grass digestion system, Bioresource Technology, 110, 379 – 389 (IF 4.546)
  2. Thamsiriroj, T., Nizami, A.S., Murphy, J.D. (2012) Why does mono-digestion of grass silage fail in long term operation? Applied Energy, 92, 783 – 790. (IF 3.88)
  3. Nizami, A.S., Orozco, A., Groom, E., Diertrich, B., Murphy, J.D., (2012) How much gas can we get from grass? Applied Energy 92: 783 - 790 (IF 3.88)


  1. Murphy, J.D., Thamsiriroj, T. (2011) What will fuel transport systems of the future? Materials Today, 14, (11) 518 - 524 (IF 6.265)
  2. Nizami, A.S., Murphy, J.D. (2011) Optimizing the Operation of a Two-Phase Anaerobic Digestion System Digesting Grass Silage. Environmental Science and Technology, 45 (17) 7561 – 7569 (IF 4.825)
  3. Browne, J., Nizami, A.S., Murphy, J.D. (2011) Assessing the cost of biofuel production with increasing penetration of the transport fuel market: a case study of gaseous biomethane in Ireland, Renewable and Sustainable Reviews, 15 (9) 4537 - 4547 (IF 4.567)
  4. Thamsiriroj, T., Smyth, H., Murphy, J.D. (2011) A roadmap for the introduction of gaseous transport fuel: A case study for renewable natural gas in Ireland Renewable and Sustainable Reviews, 15 (9) 4642 - 4651 (IF 4.567)
  5. McEniry, J., O’Kiely, P., Crossan, P., Groom, E., Murphy, J.D. (2011). The effect of feedstock cost on biofuel cost as exemplified by biomethane production from grass silage. Biofuels, Bioproducts, Biorefinery 5 (6) 670 - 682 (IF 4.885)
  6. Nizami, A.S., Singh, A., Murphy, J.D. (2011) Design, commissioning and start-up of a sequentially fed leach bed reactor complete with upflow anaerobic sludge blanket digesting grass silage, Energy and Fuels, 25 (2) 823–834 (IF 2.319)
  7. Smyth, B.M., Smyth, H., Murphy, J.D. (2011) Determining the regional potential for a grass biomethane industry. Applied Energy 88 (6) 2037–2049 (IF 3.88)
  8. Nizami, A.S., Molander, S., Asam, Z.U.Z., Rafique, R., Korres, N.E. , Kiely, G. Murphy, J. D. (2011) Comparative analysis using EIA for developed and developing countries: case studies of hydroelectric power plants in Pakistan, Norway and Sweden, International Journal of Sustainable Development and World Ecology 18(2), 134 - 142
  9. Smyth,B.M., Murphy, J.D. (2011) The indirect effects of biofuels and what to do about them: the case of grass biomethane and its impact on livestock, Biofuels, Bioproducts, Biorefinery, 5 (2)165–184 (IF 4.885)
  10. Asam Z.U.Z., Poulsen, T.G., Nizami, A.S., Rafique, R., Kiely, G., Murphy, J.D. (2011) How can we improve biomethane production per unit of feedstock in biogas plants? Applied Energy, 88(6) 2013–2018 (IF 3.88)
  11. Singh, A., Nizami, A.S., Korres, N.E., Murphy, J.D. (2011) The effect of reactor design on the sustainability of grass biomethane Renewable and Sustainable Energy Reviews, 15(3) 1567–1574 (IF 4.842)
  12. Thamsiriroj, T., Murphy, J.D. (2011) A critical review of the applicability of biodiesel and grass biomethane as biofuels to satisfy both biofuel targets and sustainability criteria Applied Energy 88 (4) 1008–1019 (IF 3.88)
  13. Thamsiriroj, T., Murphy, J.D. (2011) Modelling mono-digestion of grass silage in a 2 stage CSTR using ADM1. Bioresource Technology, 102 (2) 948–959 (IF 4.253)
  14. Thamsiriroj, T., Murphy, J.D. (2011). The impact of the life cycle analysis methodology on whether biodiesel produced from residues can meet the EU sustainability criteria for biofuel facilities constructed after 2017. Renewable Energy 36 (1) 50-63 (IF 2.226)
  15. Singh, A., Nigam, P., Murphy, J.D. (2011).Renewable fuels from Algae: An answer to debatable land based fuels Bioresource Technology, 102(1) 10–16 (IF 4.253)
  16. Singh, A.,Nigam, P.S., Murphy J.D. (2011). Mechanism and Challenges in Commercialisation of Algal Biofuels. Bioresource Technology 102 (1) 26-34 (IF 4.253)

Professional Activity


  1. Smyth, B.M., O’Gallachoir, B., Korres, N.E., Murphy, J.D. (2010). Can we meet targets for biofuels and renewable energy in transport given the constraints imposed by policy in agriculture and energy? The Journal of Cleaner Production, 18 (16-17) 1671 - 1685 (IF 1.86)
  2. Rafique, R., Poulsen, T.J., Nizami, A.S., Asam, Z.U.Z., Murphy, J.D., Kiely G. (2010) Effect of thermal, chemical and thermo-chemical pre-treatments to enhance methane production Energy, 35(12) 4556-4561 (IF 2.209)
  3. Sheehan, C., Harrington, J., Murphy, J.D., (2010). A technical assessment of topsoil production from dredged material. Resources, Conservation and Recycling 54(12) 1377–1385. (IF 2.209)
  4. Sheehan, C., Harrington, J., Murphy, J.D. (2010). An environmental and economic assessment of topsoil production from dredge material. Resources, Conservation and Recycling 55 (2) 209–220. (IF 2.209)
  5. Nizami, A.S., Thamsiriroj, T., Singh, A., Murphy, J.D. (2010). Role of leaching and hydrolysis in a two phase grass digestion system. Energy and Fuels24(8), pp 4549–4559 (IF 2.319)
  6. Thamsiriroj, T., Murphy, J.D. (2010). Difficulties associated with mono-digestion of grass as exemplified by commissioning a pilot scale digester. Energy and Fuels, 24 (8), pp 4459–4469 (IF 2.319)
  7. Thamsiriroj, T., Murphy, J.D. (2010). How much of the target for biofuels can be met by biodiesel generated from residues in Ireland? Fuel 89(11) 3579 - 3589 (IF 3.179)
  8. Smyth, B.M., Smyth, H., Murphy, J.D. (2010) Can grass biomethane be an economically viable biofuel for the farmer and the consumer? Biofuels, Bioproducts, Biorefinery, 4(5): 519 - 537 (IF 4.885)
  9. Korres, N.E., Singh, A., Nizami, A.S., Murphy, J.D. (2010) Is grass biomethane a sustainable transport biofuel? Biofuels, Bioproducts, Biorefinery, 4 (3) 310–325 (IF 4.885)
  10. Thamsiriroj,T., Murphy, J.D. (2010). Can rapeseed biodiesel meet the European Union Sustainability Criteria for Biofuels? Energy Fuels, 24 (3): 1720–1730(IF 2.319)
  11. Nizami, A.S., Murphy J.D., (2010). What type of digester configurations should be employed to produce biomethane from grass silage? Renewable and Sustainable Energy Reviews14 (6) 1558–1568 (IF 4.842)
  12. Singh, A., Pant, D., Korres, N.E., Nizami, A.S, Prasad S., Murphy, J.D. (2010) Key issues in life cycle assessment of ethanol production from lignocellulosic biomass: Challenges and perspectives Bioresource Technology101(13) 5003–5012 (IF 4.253)
  13. Singh, A., Smyth, B.M., Murphy, J.D. (2010) A biofuel strategy for Ireland with an emphasis on production of biomethane and minimization of land take Renewable and Sustainable Energy Reviews, 14(1): 277-288. (IF 4.842)


  1. Nizami, A.S., Korres, N.E., Murphy, J.D. (2009) A review of the integrated process for the production of grass biomethane. Environmental Science and Technology, 43(22): 8496–8508 (IF 4.630)
  2. Smyth, B.M., Murphy, J.D., O'Brien, C. (2009). What is the energy balance of grass biomethane in Ireland and other temperate northern European climates? Renewable and Sustainable Energy Reviews 13(9): 2349-2360 (IF 4.842)
  3. Power, N.M., Murphy, J.D. (2009). Which is the preferable transport fuel on a greenhouse gas basis; biomethane or ethanol? Biomass and Bioenergy, 33(10) 1403 - 1412 (IF 3.326)
  4. Thamsiriroj, T., Murphy, J.D., (2009). Is it better to import palm oil from Thailand to produce biodiesel than to produce biodiesel from indigenous Irish rape seed? Applied Energy 86 (5) 595–604 (IF 3.88)
  5. Murphy,J.D., Power, N.M. (2009). An argument for using biomethane generated from grass as a biofuel in Ireland. Biomass and Bioenergy 33(3) 504-512 (IF 3.326)
  6. Power, N.M., Murphy, J.D., McKeogh, E. (2009). Technical and economic analysis of biogas production in Ireland using three different crop rotations. Applied Energy, 86(1) 25 – 36, (IF 3.88)


  1. Murphy, J.D., Power, N.M. (2008). How can we improve the energy balance of ethanol production from wheat? Fuel, 87 (10-11)1799 – 1806 (IF 3.179)
  2. Power, N.M., Murphy, J.D., McKeogh, E. (2008). What crop rotation will provide optimal first generation ethanol production in Ireland from technical and economic perspectives? Renewable Energy, 33 (7) 1444 – 1454, (IF 2.226)


  1. Murphy, J.D., Power, N.M. (2007). A technical, economic, and environmental analysis of energy production from newspaper in Ireland. Waste Management, 27(2)177 – 192 (IF 2.433)


  1. Murphy, J.D., McKeogh, E. (2006). The benefits of integrated treatment of wastes for the production of energy. Energy, 31(2-3) 294-310 (IF 2.952)
  2. Murphy, J.D., Power, N.M. (2006). A technical, economic and environmental comparison of composting and anaerobic digestion of biodegradable municipal waste. Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances and Environmental Engineering, 41(5) 865 - 879.
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