Journal of Korean Society of Water and Wastewater (상하수도학회지)
- Volume 12 Issue 2
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- Pages.83-89
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- 1998
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- 1225-7672(pISSN)
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- 2287-822X(eISSN)
Removing Nitrate from Groundwater by Biofilm Filtration
생물막 여과에 의한 지하수중 질산성 질소의 제거
Abstract
The drinking water supply in Cheju entirely depends on the ground water and recently the polluted ground water bores are increasing. In 1993 Cheju Province Health-Environment Institute reported that the ground water quality of 26 of 98 bores under the drinking water quality standard. Therefore there are many investigation in the needs of the nitrate removal in the drinking water in the regin with no alternative water resources. In this study, the following results are obtained to remove the nitrate in biofilm filtration process in which uses ethanol as external carbon source. Over 90% of nitrate is removed after 10 days of experiment. The nitrate removal rate on filtration velocity is about 100% at 50m/day and 100m/day, and about 56% at 200m/day. The removal rate is reduced in 27% at 400m/day. Using ethanol as the external carbon source, denitrification kinetic is 1st-order. Denitrification constant k is 8.004(
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