Projects per year
I am leader of the research theme 'Environment, Economy, and Society' at the Environmental Research Institue (ERI) based at North Highland College in Thurso. The research theme aims to understand the, often complex, impacts of industrial developments and environmental interventions considering all aspects of sustainability, with a focus on issues affecting rural, coastal and island areas and communities.
I originally trained as a Mechanical Engineer but spent my PhD working on the Anaerobic Digestion (AD) process for biogas production and organic waste management. In the subsequent 10 years as a researcher I continued to specialise in AD, but my work broadened to cover the development of a range of other environmental and energy technologies and their integration.
I apply process engineering tools in order to design, optimise and inform the implementation of these systems, and develop coupled models to understand their economic and environmental impacts.
Process modelling including biochemical, chemical and pyhisical models.
Design, integration and optimisation of multivector energy systems
Model parameter estimation
Anaerobic digestion and biogas systems
Organic waste management
Bioenergy and biofuels
Integrated renewable energy systems
Biorefineries and biobased products
Doctor of Engineering
Award Date: 1 Jan 2010
Master of Engineering, Durham University, England
Award Date: 1 Jul 2004
Biomethane production using an integrated anaerobic digestion, gasification and CO2 biomethanation process in a real waste water treatment plant: A techno-economic assessmentMichailos, S., Walker, M., Moody, A., Poggio, D. & Pourkashanian, M., 1 Apr 2020, In : Energy Conversion and Management. 209, 112663.
Research output: Contribution to journal › Article8 Citations (Scopus)
Walker, M., Salemdeeb, R., Soma, T. & Reynolds, C., Jan 2020, Routledge Handbook of Food Waste. Reynolds, C., Soma, T., Spring, C. & Lazell, J. (eds.). Routledge, 12 p.
Research output: Chapter in Book/Report/Conference proceeding › Chapter
Assessment of micro-scale anaerobic digestion for management of urban organic waste: A case study in London, UKWalker, M., Theaker, H., Yaman, R., Poggio, D., Nimmo, W., Bywater, A., Blanch, G. & Pourkashanian, M., Mar 2017, In : Waste Management. 61, p. 258-268 11 p.
Research output: Contribution to journal › ArticleOpen AccessFile15 Citations (Scopus)5 Downloads (Pure)
Assessment and parameter identification of simplified models to describe the kinetics of semi-continuous biomethane production from anaerobic digestion of green and food wasteOwhondah, R. O., Walker, M., Ma, L., Nimmo, B., Ingham, D. B., Poggio, D. & Pourkashanian, M., 9 Mar 2016, In : Bioprocess and Biosystems Engineering. 39, 6, p. 977-992 16 p.
Research output: Contribution to journal › ArticleOpen AccessFile6 Citations (Scopus)1 Downloads (Pure)
Modelling the anaerobic digestion of solid organic waste -Substrate characterisation method for ADM1 using a combined biochemical and kinetic parameter estimation approachPoggio, D., Walker, M., Nimmo, W., Ma, L. & Pourkashanian, M., Jul 2016, In : Waste Management. 53, p. 40-54 15 p.
Research output: Contribution to journal › ArticleOpen AccessFile28 Citations (Scopus)5 Downloads (Pure)
Modelling an off-grid integrated renewable energy system for rural electrification in India using photovoltaics and anaerobic digestionCastellanos, JG., Walker, M., Poggio, D., Pourkashanian, M. & Nimmo, W., Feb 2015, In : Renewable Energy. 74, p. 390-398 9 p.
Research output: Contribution to journal › Article48 Citations (Scopus)
Modeling the water scrubbing process and energy requirements for CO2 capture to upgrade biogas to biomethaneNock, W. J., Walker, M., Kapoor, R. & Heaven, S., 10 Jul 2014, In : Industrial Engineering Chemistry Research. 53, 32, p. 12783-12792 10 p.
Research output: Contribution to journal › Article32 Citations (Scopus)