Process Modeling Based Physical Input-Output Table (PIOT) for Nitrogen Flows Using ASPEN Plus: A Comparison with Empirical PIOT for Illinois

Liz Wachs

Department of Agricultural and Biological Engineering, Purdue University

Liz is a second year PhD student. She holds a BA in Ancient History and Classical Civilization (University of Texas at Austin), BS in Chemical Engineering (Purdue University) and MA in Desert Studies (from Ben-Gurion University of the Negev) focused on environmental policy and livestock husbandry systems in Israel.  Her research is focused on large-scale modeling of nitrogen flows for economic and ecological policy analysis. She is a member of the American Institute of Chemical Engineering (AIChE) and ISIE. 


Physical Input-Output Tables (PIOTs) depict material flows in the economy using the input-output (IO) framework. PIOTs combine the strength of material flow analysis (MFA) and IO models by connecting material flows to the... [ view full abstract ]


  1. Liz Wachs (Department of Agricultural and Biological Engineering, Purdue University)
  2. Shweta Singh (Department of Agricultural and Biological Engineering, Environmental and Ecological Engineering, Purdue University)

Topic Areas

• Environmentally and socially-extended input-output analysis , • Socio-economic metabolism and material flow analysis , • Circular economy


MS-3 » Resource efficiency and metabolism (10:00 - Monday, 26th June, Room F)

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