Paul J. Weimer

Picture of Paul J. WeimerAssociate Professor of Bacteriology
1925 Linden Drive
Phone: (608) 890-0075
Overview · Publications


Ph.D 1978 University of Wisconsin-Madison

Areas of Study

Rumen microbiology
anaerobic metabolism
biopolymer degradation

Research Overview

Our research involves the microbiology of fiber digestion by the anaerobic microflora of the rumen. The rumen is an ideal ecosystem for studying metabolic interactions owing to the wide physiological and biochemical diversity of its many microbial species. Our group is interested in elucidating strategies for cellulosic biomass conversion in the rumen as a model system for understanding "consolidated bioprocessing" (CBP) schemes that employ anaerobic bacteria to carry out all steps of the conversion (cellulase synthesis, microbial cell growth and end product formation) in the same bioreactor; CBP is the lead candidate platform for second-generation production of fuels and chemicals from cellulosic biomass. In addition, we are determining bacterial community composition and dynamics in cows under different feeding and management conditions, with the goal of establishing more favorable species mixtures to improve animal production.


  • Microbiology 425: Environmental Microbiology


  • U.S. Dairy Forage Research Center
  • Collaboration with scientists in the Republic of Kazakhstan, through the US Department of Agriculture - Former Soviet Union Cooperative Research Program, to train former Soviet weapons scientists in agricultural research, and to develop agricultural technologies for commercialization in Kazakhstan.