Simulation of three-phase fluidized bioreactors for denitrification

Technical Report · Sun Mar 01 00:00:00 EST 1981

DOI:https://doi.org/10.2172/6795219· OSTI ID:6795219

Hamza, A V; Dolan, J F; Wong, E W

Fluidized-bed bioreactors were developed and operated at three scales (diameters of 0.1, 0.2, and 0.5 m) by the Chemical Technology Division. The performance of these reactors in denitrification was simulated using the following modified form of Monod kinetics to describe the reaction kinetics: rate = V/sub max/ (NO/sub 3//sup -//K/sub s/ + NO/sub 3//sup -/) (% biomass). In the fluids-movement portion of the simulation the tanks-in-series approximation to backmixing was used. This approach yielded a V/sub max/ of 3.5 g/m/sup 3/-min (% biomass) and a K/sub s/ of 163 g/m/sup 3/ for the 0.5-m bioreactor. Values of V/sub max/ and K/sub s/ were also determined for data derived from the 0.1-m bioreactor, but inadequate RTD data reduced the confidence level in these results. A complication in denitrification is the multi-step nature of the reduction from nitrate to nitrite to hyponitrite and finally to nitrogen. An experimental study of the effect of biomass loading upon denitrification was begun. It is recommended that the experimental work be continued.

• Research Organization: Massachusetts Inst. of Tech., Oak Ridge, TN (USA). School of Chemical Engineering Practice
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6795219
• Report Number(s): ORNL/MIT-324; TRN: 81-007211
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
59 BASIC BIOLOGICAL SCIENCES
NITRATES
BIOCONVERSION
REMOVAL
WASTE WATER
DENITRIFICATION
COAL FINES
FLOW RATE
FLUIDIZED BED REACTORS
FUEL REPROCESSING PLANTS
IMMOBILIZED CELLS
LOADING RATE
MATHEMATICAL MODELS
PSEUDOMONAS
SIMULATION
THEORETICAL DATA
BACTERIA
CHEMICAL REACTIONS
DATA
FUEL DISPERSION REACTORS
HOMOGENEOUS REACTORS
HYDROGEN COMPOUNDS
INFORMATION
LIQUID WASTES
MICROORGANISMS
NITROGEN COMPOUNDS
NUCLEAR FACILITIES
NUMERICAL DATA
OXYGEN COMPOUNDS
REACTORS
WASTES
WATER
052001* - Nuclear Fuels- Waste Processing
550700 - Microbiology