Arizona State University

Arizona Science and Technology Enterprises LLC

Sudeep Popat

Bruce E Rittmann

Cesar Torres

Prathap Parameswaran

Rosa Krajmalnik-Brown

The present disclosure is directed toward membrane biofilm reactors primarily comprising microorganisms that produce chemical fuel products or precursors thereof. Reactors of the present disclosure can primarily comprise acetogens, a methanotrophs, and/or

Membrane biofilm reactors, systems, and methods for producing organic products

A membrane biofilm reactor including a vessel defining a volume is disclosed. The reactor also typically includes a first and second plurality of hollow fiber membranes. Each hollow fiber membrane generally has an outer surface and a lumen, and is located within the volume. The reactor further preferably includes a first and second gas feedstock. The first gas feedstock is provided through a first inlet in fluid communication with the lumens of the first plurality of hollow fiber membranes. The second gas feedstock is provided through a second inlet in fluid communication with the lumens of the second plurality hollow fiber membranes. Finally, the reactor also typically includes a biofilm formed on the outer surface of the hollow fiber membranes and made up of methanotrophs,, or both. The first gas feedstock is preferably different from the second gas feedstock.

A microbial electrolysis cell having a brush anode is described. A method of producing products, such as hydrogen, at the cathode of the microbial electrolysis cell is also provided. The microbial electrolysis cell is configured in a cylindrical shape having an anode, cathode and anion exchange membrane all disposed concentrically. A brush anode spirally wound around the outside of the cylindrical microbial electrolysis cell is described. The method may include sparging the anode and/or cathode with air in some cases. In addition, CO-containing gas may be injected into a cathode chamber to reduce pH is some cases.

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Chandler, AZ, United States of America

Sudeep Popat