KMID : 1024519930020040325
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Journal of the Environmental Sciences 1993 Volume.2 No. 4 p.325 ~ p.330
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A Study on an Aerobic Fluidized-Bed Biofilm Reactor for Treating Industrial Wastewaters(II) -Effect of Organic Shock Loading Rate on Biomass Characteristics-
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Ahn Kab-Hwan
Park Young-Seek Choi Yoon-Chan Kim Dong-Seog Song Seung-Koo
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Abstract
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A number of experiments were conducted in order to investigate the organic removal efficiency and biomass characteristics according to the organic shock loading rate in a fluidized bed biofilm reactor. At the operation conditions of HRT, 8.44 hour, superficial upflow velocity, 0.9 cm/sec and temperature, 22, the removal efficiency of SCOD was founded to be 96.5, 92 and 90 % with the organic shock loading rate of 3.5, 10.8 and 33 kgCOD/m¤ýday, respectively. Within the F/M ratio ranged 0.4 to 2.0 kgCOD/kgVSS¤ýday, the SCOD removal efficiency was shown as 90% at F/M ratio of 2.0 kgCOD/kgVSS¤ýday, but the TCOD removal efficiency was 72 % at F/M ratio of 1.8 kgCOD/kgVSS¤ýday. The average biomass concentrations were 7800, 14950 and 27532 mg/l on the organic shock loading rate of 3.5, 10.8 and 33 kgCOD/¤ýday, respectively. This result was agreed with the fact that more biomass could be produced at high concentration of substrate, but some biomass was detached at the onset of shock and easily acclimated at the shock condition.
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KEYWORD
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fluidized-bed biofilm reactor, organic shock loading, biomass characteristics
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