Welcome to my homepage! I am an Associate Professor based in Sweden with main interest in environmental assessment of food and bioenergy systems. I have created this page so that anybody who is interested can learn more about me and my research.

Agricultural and forestry systems are often very complex, involving both biological and technical features. When evaluating the sustainability of a certain food, biofuel or bioenergy system, it is therefore important to have a wide systems approach. For this you can use different quantitative or qualitative tools and models. I mainly work with life cycle assessment (LCA), which is a quantitative evaluation tool. 

My Masters in agricultural engineering was completed 2004, and my PhD in 2009, both from the Swedish University of Agricultural Sciences. This is also where I currently work as a researcher, after doing a postdoc at Lund University.

I also do shorter consultancy assignments, e.g. energy balances, GHG calculations

See full CV here

New paper! (Oct 2016) Karlsson, H., Ahlgren, S., Sandgren, M., Passoth, V., Wallberg, O., Hansson, P.-A. 2016. A systems analysis of biodiesel production from wheat straw using oleaginous yeast: process design, mass and energy balances. Biotechnology for Biofuels, 9(1), 229. Link

New paper! (Dec 2016) Moghaddam, E.A., Ahlgren, S., Nordberg, Å. 2016. Assessment of Novel Routes of Biomethane Utilization in a Life Cycle Perspective. Frontiers in Bioengineering and Biotechnology, 4(89). Link