Operation of a fluidized-bed bioreactor for denitrification

Conference · Sun Jan 01 04:00:00 EST 1978

OSTI ID:6748700

Hancher, C W; Taylor, P A; Napier, J M

Two denitrification fluidized-bed bioreactors of the same length (i.e., 5 m) but with different inside diameters (i.e., 5 and 10 cm) have been operated on feed ranging in nitrate concentration from 200 to 2000 g/m/sup 3/; thus far, good agreement has been obtained. Two 10-cm-ID bioreactors operating in series have also been tested; the results are in accordance with predicted results based on the performance of a 5-cm-ID bioreactor. The overall denitrification rate in the dual 10-cm-ID bioreactor system was found to be 23 kg N(NO/sub 3//sup -/)/day-m/sup 3/ using feed with a nitrate concentration of 1800 g/m/sup 3/. Data obtained in operating-temperature tests indicate that the maximum denitrification rate is achieved between 22 and 30/sup 0/C. These data will form the basis of the design of our mobile pilot plant which consists of dual 20-cm-ID by 7.3-m-long bioreactors.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6748700
• Report Number(s): CONF-780549-2
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
BACTERIA
BIOCONVERSION
CHEMICAL REACTIONS
CHEMICAL REACTORS
DENITRIFICATION
DESIGN
DISPERSIONS
FLUIDIZED BED
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
MICROORGANISMS
MIXTURES
OXYGEN COMPOUNDS
PERFORMANCE
PROCESS SOLUTIONS
PROCESSING
PSEUDOMONAS
RADIOACTIVE WASTE PROCESSING
SOLUTIONS
TEMPERATURE DEPENDENCE
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER