Nitrate Removal in Aquariums by Immobilized Pseudomonas
Nitrate Removal in Aquariums by Immobilized Pseudomonas
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DOI：
10.1021/bp0200088
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发表时间：
2003
影响因子：
2.9
通讯作者：
Y. Tal;A. Nussinovitch;J. van Rijn
中科院分区：
文献类型：
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作者：
Y. Tal;A. Nussinovitch;J. van Rijn
Biological denitrification of nitrate to nitrogen gas was examined in a freshwater and a marine aquarium. Nitrate removal in the aquarium water was accomplished with denitrifiers immobilized in a freeze‐dried, alginate‐starch matrix. Starch served as a bacterial carbon source and cellular matrix‐strengthening filler. Freeze‐dried beads were placed in canisters through which nitrate‐rich aquarium water was recirculated. The freshwater aquarium (100 L) contained goldfish (Carassius auratus) at a total biomass of 390 g, whereas cichlids (Oreochromis mossambicus) were kept at a similar stocking density in the marine aquarium. Denitrification resulted in low ambient nitrate concentrations in both aquariums. The specific nitrate removal rate of the freshwater beads was significantly higher (50 μg of NO3‐N/bead/day) than that of seawater beads (5 μg of NO3‐N/bead/day). Differences in ambient nitrate concentrations between both aquariums and diffusion limitation of nitrate to the active denitrification sites within the beads might explain these observed differences.
