1. STUDIES WITH ANAEROBIC MIGRATING BLANKET REACTOR  AMBR treatment of low-strength wastewater at low temperature  Characterization of microbial community structure in a compartmentalized anaerobic reactor  Effect of an organic shock load on the stability of AMBR  The Formulation of Granules and Methanosueta-Fibers in AMBR Largus T. Angenent A Novel anaerobic treatment system, the anaerobic migrating blanket reactor (AMBR) [US Patent No. 5,885,460] was developed. Influent Effluent Biogas

2. HIGH RATE ANAEROBIC DIGESTER For Converting Animal/Farm Wastes into Fuel and Chemicals Animal waste and biomass by products constitute a large source of affordable and renewable energy while also threat to air, water and soil quality. Therefore methods for their efficient treatment and safe disposal are in great demand. Improve biomass utilization via advancing the fundamental understanding of hydrodynamics, digester design and configuration, and performance modeling through development of advanced diagnostic techniques (e.g., Dual source tomography, Multiparticles Tracking, Etc.) Oak Ridge National Labs (ORNL) D.DePaoli (Projt. Manager) T. Klasson C.W. Alexander A. Winterberg Principal Investigator M.H. Al-Dahhan (Project Director) Iowa Energy Centre- Biomass Energy Conversion Facility (BECON) Norm Oslon (Projt. Manager) Washington University (WU) M.H. Al-Dahhan (Projt. Manager) K. Karim (Research associate) Mehul S. Vesvikar (Grad. Student) Rajneesh Varma (Grad. Student) Undergraduate students

3. Schematic Diagram of Various High Rate Anaerobic Digester Configurations A. Mechanical agitation Gas outlet Slurry level B. Slurry recirculation Gas outlet Gas pump Slurry level Gas outlet Heating pipes Gas outlet C. Gas recirculationD. Mechanical mixing with draft tube

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