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Journal Article

# Fluidized-Bed Bioreactor for Coal-Conversion Effluents

Douglas D. Lee, Charles D. Scott and Charles W. Hancher
Journal (Water Pollution Control Federation)
Vol. 51, No. 5 (May, 1979), pp. 974-984
Stable URL: http://www.jstor.org/stable/25039933
Page Count: 11

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Topics: Phenols, Bioreactors, Biodegradation, Oxygen, Coal, Thiocyanates, Recycling, Ammonia, Microorganisms, Inlets

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## Abstract

A bioreactor system based on a tapered fluidized bed is under development for the microbiological degradation of hazardous organic compounds such as those in aqueous waste effluents from coal-conversion processes. The fluidized bed is composed of particles that have adhering microorganisms. The tapered reactor stablilizes the fluidized bed while allowing a much wider range of operating conditions than is possible with conventional cylindrical reactors. A laboratory-scale study indicated that phenol concentration can be reduced from greater than 100 $\mu {\rm g}/{\rm cm}^{3}$ to less than 0.25 $\mu {\rm g}/{\rm cm}^{3}$ in a few minutes. Scale-up is considered practical. Preliminary tests with aqueous scrub solutions from a bench-scale hydrocarbonization experiment show that both phenols and thiocyanates can be degraded.

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