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Currently, the petrochemical industry uses fossil fuels as the source of carbon for the production of many things, including plastics. This is problematic because carbon dioxide adds to climate change and, in addition, fossil fuels are running out. Therefore, LARGUS ANGENENT and his research group are looking for new sources of carbon. As he explains in this video, their aim is to convert waste into the chemicals needed without adding anything to the original waste product. Specifically, they have focused on acid whey, a side product from the production of Greek yogurt. They have developed a two-phase system that allows them to convert acid whey into medium-chain carboxylic acids, their product of choice. This successful conversion from valueless waste into a useful product is an important step in the process of resource recovery.


Largus Angenent is Professor of Environmental Biotechnology at the Center of Applied Geosciences, Eberhard Karls University of Tübingen. Before this appointment, he was Professor in the Department of Biological and Environmental Engineering at Cornell University. Currently, he is interested in recovering carbon with open cultures, defined mixed cultures or pure cultures of microbes. He is co-owner of several US patents and has received a number of awards and honors, for instance, the Alexander von Humboldt Professorship (2017) and the SUNY Chancellor’s Award for Excellence in Scholarship and Creative Activities (2015).

Original publication

Temperature-Phased Conversion of Acid Whey Waste Into Medium-Chain Carboxylic Acids via Lactic Acid: No External e-Donor

Angenent Largus T., Xu Jiajie, Hao Jiuxiao, Guzman Juan J.L., Spirito Catherine M. and Harroff Lauren A.
Published in 2018