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KMID : 0613819990090060698
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Journal of Life Science
1999 Volume.9 No. 6 p.698 ~ p.703
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Nitrate Removal by Immobilized Denitrifying Bacteria in Recirculating Aquaculture System
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Abstract
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For the nitrate removal in recirculating aquaculture system, a denitrifying bacterium, Pseudomonas fluorescens, was isolated from municipal sewage and the cells were immobilized in modified-polyvinly alchol (PVA) gel beads. The immobilized cells in both the fixed-and fluidized-bed reactors showed 98% of denitrification efficiency with 6hr HRT, and the removal efficiency of total organic carbon (TOC) was above 90%. Form scanning electron microscopy (SEM) observation, it was known that biofilm formed in fixed-bed reactor was thicker than that formed in fluidized-bed reactor as operation time passed.
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