Kinetic model for a fluidized-bed bioreactor for denitrification of wastewaters

Conference · Fri Jan 01 00:00:00 EST 1982

OSTI ID:5179155

Hancher, C. W.; Perona, J. J.

A fluidized-bed bioreactor was operated continuously for a period of seven months for nitrate removal from an aqueous stream. The fluidized particles were 30- to 60-mesh anthracite coal supporting a fixed biofilm. The reactor was composed of two vessels in series each 20 cm in diameter and with an operating height of 6.3 m. The nitrate concentration in the reactor feed ranged from 100 to 15,000 g/m/sup 3/. A model for nitrate removal was developed using Michaelis-Menten kinetics. Axial dispersion effects were considered to be negligible, and effectiveness factors were greater than 0.9 for most experimental conditions. The effluent nitrite concentration peaked sharply at a feed nitrate concentration of 4400 g/m/sup 3/. At higher concentrations the nitrite decomposition rate depended on the nitrite concentration to about the 0.4 power.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5179155
• Report Number(s): CONF-820580-2; ON: DE82015696
• Resource Relation: Conference: 4. symposium on biotechnology in energy production and conservation, Gatlinburg, TN, USA, 11 May 1982
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CHEMICAL REACTORS
DESIGN
NITRATES
BIODEGRADATION
DENITRIFICATION
REMOVAL
NITRITES
WASTE WATER
WATER TREATMENT
ANTHRACITE
BACTERIA
EXPERIMENTAL DATA
FLUIDIZED BED
MATHEMATICAL MODELS
PILOT PLANTS
REACTION INTERMEDIATES
BLACK COAL
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
DATA
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
HYDROGEN COMPOUNDS
INFORMATION
LIQUID WASTES
MATERIALS
MICROORGANISMS
NITROGEN COMPOUNDS
NUMERICAL DATA
OXYGEN COMPOUNDS
WASTES
WATER
520200* - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)