Studies on Removing Sulfachloropyridazine from Groundwater with Microbial Bioreactors |
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Authors: | William J Hunter Dale L Shaner |
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Institution: | (1) USDA–ARS, 2150-D Centre Avenue, Fort Collins, CO 80526-8119, USA |
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Abstract: | Sulfachloropyridazine (SCP), an antibiotic used in aquaculture and in animal husbandry, is a common contaminant in surface
and groundwaters. Two types of microbial reactors were evaluated as methods for removing SCP from flowing water. One type
of reactor evaluated was a nitrogen-limiting biobarrier; the other a slow-sand-filter. Results showed that the soybean oil-fed,
nitrogen-limiting biobarrier was not very effective at removing SCP from flowing water. When supplied with flowing water containing
2.4 mg l−1 SCP the nitrogen-limiting biobarrier removed ~0.6 mg l−1 SCP or about 28% of that present. SCP removal by the nitrogen-limiting biobarrier may not have been biological as abiotic
removal was not ruled out. More efficient biological removal was obtained with the slow-sand-filter which reduced the SCP
levels from 2.35 to 0.048 mg l−1, a removal efficiency of ~98%. High levels of nitrate nitrogen, 50 mg l−1 N, did not interfere with the removal processes of either reactor suggesting that SCP was not being degraded as a microbial
nitrogen source. |
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Keywords: | |
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